Quarterlytics / Consumer Cyclical / Specialty Retail / TransAlta

TransAlta

ta · TSX Consumer Cyclical
Claim this profile
Ticker ta
Exchange TSX
Sector Consumer Cyclical
Industry Specialty Retail
Employees 1001-5000
← All annual reports
FY2017 Annual Report · TransAlta
Sign in to download
Loading PDF…
Power

Low Cost
Reliable
Clean
Firm

TransAlta Corporation
2017 Annual Integrated Report

Letter to Shareholders 

Message from the Chair 

Management’s Discussion and Analysis 

Consolidated Financial Statements 

Notes to Consolidated Financial Statements 

Eleven-Year Financial and Statistical Summary 

Plant Summary 

Sustainability Performance Indicators 

Independent Sustainability Assurance Statement 

Shareholder Information 

Shareholder Highlights 

Corporate Information 

Glossary of Key Terms 

1

4

M1

F1

F10

200

202

203

206

208

210

211

212 

Letter to Shareholders

Dear Fellow Shareholders,

At TransAlta we make the energy our customers need and want. For over 
100 years we have produced reliable power. Today, the demand for low-cost 
and reliable energy is greater than ever — and it must be clean and available 
at the flip of a switch, 24/7.

Renewable power sources alone cannot provide this guarantee. TransAlta’s 
asset mix can. With a mix of hydro, wind, gas and solar power, TransAlta 
has the assets, expertise and growth platform to help meet the demand for 
clean power, while not compromising on reliability.

By 2025 we will deliver 100 per cent clean power 

and be the energy provider of choice.
To achieve this, we are accelerating the conversion of 

We preserved maximum value from our coal plants  
by securing an additional 75 years of combined life for 

our  existing  coal  facilities  and  adding  more  than  

our  coal  plants  to  natural  gas,  strengthening  our 

$1 billion in anticipated free cash flow and $37 million 

balance sheet and advancing our growth projects. We 

annual off-coal payments from the province of Alberta.

will combine natural gas with renewable power to 

deliver the reliability the market demands. As I outline 

in this letter, we have already made significant headway 

We negotiated full credit for our renewable assets 
under the carbon credit regime. As a result, over time, 

and a future of clean energy leadership is well within 

our wind and hydropower assets in Alberta will deliver 

our grasp.

$30 million to $50 million in value annually.

2015-2017: Building the Framework for Success
Over the course of two short years we eliminated the 

We supported the development of a capacity market 
in Alberta, which we expect will allow us to bid our 

uncertainty surrounding TransAlta’s future in a clean 

converted gas plants to support our customers.

energy environment and established the framework for 

future operating success.

We strengthened our balance sheet — reducing net 
debt by $500 million, increasing our financial flexibility 

and preserving our investment grade credit rating.

1

TransAlta Corporation    |    2017  Annual Integrated ReportEverything we do in 2018 and beyond will move us closer to 
100 per cent clean power by 2025.

“

These significant achievements, over the past two 

We are re-tooling our business to sharpen our focus on 

years, give us the clarity and confidence we need to 

the customer and to enable our employees to get work 

execute informed plans that propel us forward to a 

done!  Our  internal  efficiency  initiative,  Project 

future  of  100  per  cent  clean  electricity.  Our  2017 

Greenlight, is driving millions of dollars in cash value 

financial performance also demonstrates the strength 

from more efficient processes that will equip us to 

of the underlying fundamentals of our business. In 

serve  more  customers,  better.  We  are  already 

terms of overall performance, in 2017, we generated 

benefiting from leaner, more efficient operations with 

more  cash  flow  than  we  have  ever  generated,  at  
$328 million, and we gained significant confidence in 

plenty  of  scope  to  generate  additional  recurring 
savings. What I love about Greenlight is that it involves 

future cash flows through the execution of our strategic 

and rewards our people from the front lines to the back 

efficiency initiative, and our decision to transition to 

lines in over 900 initiatives are improving the company 

gas-fired generation.

in every corner of our operations. It is a new tool for the 

future and it’s a game-changer for our culture.

2018-2020: Becoming the Energy Provider of Choice
Customers  want  power  that  helps  make  them 

competitive,  environmentally  sensitive,  forward-

2025: Generating 100 Per Cent Clean Power
Everything we do in 2018 and beyond will move us 

looking and proud of who provides their power. We can 

closer to 100 per cent clean power by 2025. Our teams 

offer this. To do so, we must enhance our balance sheet 

are motivated and focused around this common goal. 

to preserve our investment grade credit rating — the 

We are moving ahead with our plans to transition from 

assurance  that  major  industrial  and  commercial 

coal to gas. We will continue to strategically manage 

customers require to do business with us.

our operational flexibility to ensure efficient capital 

allocation and energy supply based on market demands.

We  are  in  the  final  innings  of  our  debt  repayment 

program. Between 2018 and 2020, we will reduce our 

At the end of 2017, we had to take the unusual step of 

senior corporate debt to $1.1 billion, and have $1.0 billion 

consolidating our operations at Sundance to improve 

of amortizing project debt secured by our contracted 

efficiency  by  reducing  coal  and  greenhouse  gas 

portfolio. We believe this is an appropriate amount of 

emissions. With carbon now priced in Alberta, we 

leverage for our Alberta coal and hydro assets. By 2020, 

simply must optimize around carbon costs.

our FFO/debt ratio will give us a balance sheet that can 

weather any storm. It also means that capital allocation 

In the new capacity market, we will have the opportunity 

from here can start to focus on returns to shareholders 

to return five Sundance units to service as we transition 

and new growth. We know that customers value a 

them  to  gas-fired  generation.  Our  Sundance  and 

strong  balance  sheet  and  it’s  a  key  competitive 

Keephills units are part of our vision for clean power by 

advantage in our business.

2025. When the wind isn’t blowing, the water isn’t 

flowing, and the sun isn’t shining, we’ll be supporting 

customers in Alberta out of these plants.

2

TransAlta Corporation    |    2017  Annual Integrated ReportAs we think about a cleaner 2025, we are very clear that 
renewables play a much larger part. 

“

To meet the competitive pressures in Alberta, we’ve set 

a goal to have all our coal plants converted to gas by 

Capital Allocation
We have a clear line of sight to $1.2 billion in free cash 

2022. To ensure success, we have secured a pipeline 

flow from our existing operations between 2018 and 

agreement that will connect our plants to gas supply. 

2020 — $1 billion coming from our ongoing operations 

This means we can begin to blend our coal with gas to 

and $200 million coming from the PPA termination of 

reduce costs, emissions and carbon tax expenses and 

the Sundance units. This cash backs up our financial 

crucially get to work on our coal-to-gas conversions a 

plan  and  positions  us  for  strong  capital  allocation 

year earlier than expected.

decisions going forward, including the share buyback 
as described in Chairman Giffin’s Letter to Shareholders.

As we think about a cleaner 2025, we are very clear that 

renewables play a much larger part. Therefore, we are 

Today, TransAlta is focused on converting our coal 

continuing to invest in the exploratory development of 

plants to gas and maximizing the value of our hydro 

our Brazeau Hydro pumped storage expansion plan, 

assets. TransAlta Renewables is focused on growing 

which will meet the demand for clean, low cost, reliable 

contracted cash flows from wind, solar, hydro and 

and firm power. A project like Brazeau will require a 

storage  for  customers  both  inside  and  outside  of 

policy environment that supports the vision that clean, 

Alberta. The great news is that we are returning to a 

carbon-free power will dominate in Canada. We look 

time  when  TransAlta  can  take  our  cash  from  our 

forward to large hydro being a key part of the mix for 

Alberta assets and our contracted renewables assets 

Alberta again. By pushing on projects like Brazeau 

and think carefully about capital allocation.

today, we can take Alberta to a future where power is 
low cost — green — firm and reliable.

On  behalf  of  our  leadership  team,  we  very  much 

appreciate all your support and we thank our people 

for all that they do every day to serve our customers 

and build our company.

Dawn L. Farrell
President and Chief Executive Officer

March 1, 2018

3

TransAlta Corporation    |    2017  Annual Integrated ReportMessage from the Chair

From your Board’s perspective, 2017 can be best characterized in one word 
— progress. Steady, strategic progress.

First, let me assure you that the Board listened to the 

program will be complete and we’ll start to have more 

message delivered by our shareholders through the 

significant discussions about capital allocation.

say-on-pay vote last spring. The Board and management 

are firmly committed to a compensation philosophy 

While  the  public  markets  have  yet  to  recognize 

with the principle of pay for performance at its core. We 

TransAlta’s progress, the Board believes the financial 

have  undertaken  an  extensive  outreach  program, 

performance of the company has improved and our 

creating an ongoing dialogue with shareholders so that 

strategy is strong. The market will catch up to the 

we remain current on your thinking. We have also 

decisions we have made.

enhanced our approach to executive compensation, 

which is described in more detail in the Compensation 

As always, the Board and management are focused on 

Discussion & Analysis. 

the  future.  There  are  new  opportunities  ahead, 

including the transition to a capacity market and what 

Much like the legendary tortoise, without a lot of flash 

is proving to be a very competitive environment in 

or attention, your TransAlta employee team, across the 

which  to  build  the  next  generation  of  renewables. 

company, made substantial progress to improve the 

TransAlta is ready. The Board would like to express its 

company’s performance and to position it for success 

ongoing confidence in TransAlta’s leadership team and 

in the new and evolving power sector of the future. 

their  vision.  We  value  and  appreciate  their 

determination and personal resolve. 

In early 2017, TransAlta stated its strategic mission to 

become  Canada’s  leading  clean  power  company, 

In summary, the Board and the dedicated team of 

thereby creating value for its shareholders, customers, 

TransAlta employees have been diligent in the rigorous 

employees and other stakeholders in the decades ahead. 

pursuit of actions and policies to make TransAlta the 

In pursuit of that vision, 2017 saw many achievements, 

leading  clean  power  generator  —  a  company  that 

among them greater efficiency and innovation, debt 

consistently delivers value to shareholders. This is a 

reduction and an accelerated plan to convert our coal 

marathon, not a sprint, and the Board is confident that 

plants to gas. These are described in greater detail in 

our management has its eyes on the finish line, and, 

President and CEO Dawn Farrell’s accompanying letter.

like that tortoise, is on an inexorable path to cross it.

With the better-than-expected performance from the 

business, and the strong outlook, we are confident in 

the execution of our plan for 2018 to 2020 and have 

decided to allocate a portion of our capital to buy back 

our shares when we feel they are undervalued. In 2019, 

Ambassador Gordon D. Giffin
Chair of the Board of Directors

as the business continues to thrive, our de-leveraging 

March 1, 2018

4

TransAlta Corporation    |    2017  Annual Integrated ReportManagement’s Discussion and Analysis

TRANSALTA CORPORATION 

Management’s Discussion and Analysis 
Forward-Looking Statements   
Table of Contents 
Additional IFRS Measure and Non-IFRS Measures  

Accounting Changes   

M2  

M3  

Critical Accounting Policies and Estimates   

Business Model 

Highlights   

M4 

Competitive Forces 

M5  

TransAlta’s Capital 

Discussion of Consolidated Financial Results 

M7 

2017 Sustainability Performance 

Significant and Subsequent Events 

M21 

2018 Sustainability Performance Targets 

Financial Position  

Cash Flows 

Financial Instruments 

2018 Financial Outlook 

M27 

Governance and Risk Management 

M28 

Fourth Quarter   

M29 

Discussion of Consolidated Financial Results 

M31  

Selected Quarterly Information   

Other Consolidated Analysis 

M33  

Disclosure Controls and Procedures    

M37  

M43  

M45  

M48  

M76  

M78 

M80 

M91  

M92 

M96  

M98  

This Management’s Discussion and Analysis (“MD&A”) should be read in conjunction with our audited annual 2017 consolidated 
financial statements and our Annual Information Form for the year ended Dec. 31, 2017. Our consolidated financial statements 
have been prepared in accordance with International Financial Reporting Standards (“IFRS”) for Canadian publicly accountable 
enterprises as issued by the International Accounting Standards Board (“IASB”) and in effect at Dec. 31, 2017. All dollar amounts 
in the following discussion, including the tables, are in millions of Canadian dollars unless otherwise noted and except amounts per 
share  which  are  in  whole  dollars  to  the  nearest  two  decimals.  This  MD&A  is  dated  March  1,  2018.  Additional  information 
respecting TransAlta Corporation (“TransAlta”, “we”, “our”, “us” or the “Corporation”), including our Annual Information Form, is 
available on SEDAR at www.sedar.com, on EDGAR at www.sec.gov and on our website at www.transalta.com. Information on or 
connected to our website or our social media channels is not incorporated by reference herein.  

TRANSALTA CORPORATION M1
M1

TransAlta Corporation    |    2017  Annual Integrated Report 
 
 
 
 
This MD&A, the documents incorporated herein by reference, and other reports and filings made with securities regulatory 
Forward-Looking Statements
authorities  include  forward-looking  statements  or  information  (collectively  referred  to  herein  as  “forward-looking 
statements”) within the meaning of applicable securities legislation. Forward-looking statements are presented for general 
information purposes only and not as specific investment advice. All forward-looking statements are based on our beliefs as 
well as assumptions based on information available at the time the assumptions were made and on management’s experience 
and perception of historical trends, current conditions, and expected future developments, as well as other factors deemed 
appropriate  in  the  circumstances.  Forward-looking  statements  are  not  facts,  but  only  predictions  and  generally  can  be 
identified by the use of statements that include phrases such as “may”, “will”, “believe”, “expect”, “anticipate”, “intend”, “plan”, 
“project”, “forecast”, “foresee”, “potential”, “enable”, “continue”, or other comparable terminology. These statements are not 
guarantees of our future performance and are subject to risks, uncertainties, and other important factors that could cause 
our actual performance to be materially different from that projected. 

In  particular,  this  MD&A  contains  forward-looking  statements  pertaining  to:  our  business  model  and  anticipated  future 
financial performance; our success in executing on our growth projects; the timing of the construction and commissioning of 
projects  under  development,  including  the  Brazeau  Hydro  pumped  storage  Project,  the  Kent  Hills  3  Wind  Project,  the 
Antelope Coulee Wind Project, the Garden Plain wind Project, and the conversion of our Sundance Units 3 to 6 and Keephills 
Units 1 and 2 from coal-fired generation to gas-fired generation, and their timing, attendant costs and sources of funding; the 
benefits  to  be  realized  from  converting  coal-fired  facilities  to  gas-fired  facilities,  including  reductions  in  emissions;  the 
retirement of Sundance Unit 1 and the mothballing of Sundance Units 2 to 5; the compensation expected from the Balancing 
Pool and sustaining capital expenditures in connection with the termination of the Alberta Power Purchase Arrangements; 
spending on growth and sustaining capital and productivity projects; expectations in terms of the cost of operations, capital 
spending, and maintenance, and the  variability of those  costs; expected decommissioning costs;  the section titled  “2018 
Financial Outlook”; the ability of Sundance Unit 2 to qualify for the  expected 2019 capacity market auction; coal supply 
constraints for our facilities in Alberta and their impact on our mining costs and power generation at our Sundance Units 3 to 
6  and  Keephills  Units  1  to  3;  the  impact  of  certain  hedges  on  future  reported  earnings  and  cash  flows,  including  future 
reversals of unrealized gains or losses; our dividend payout ratio; expectations related to future earnings and cash flow from 
operating and contracting activities (including estimates of full-year 2018 comparable earnings before interest, depreciation 
and  amortization  (“EBITDA”),  funds  from  operations  (“FFO”)  and  free  cash  flow  (“FCF”),  and  expected  sustaining  capital 
expenditures; expectations in respect of financial ratios and targets and the timing associated with  meeting such targets 
(including FFO before interest to adjusted interest coverage, adjusted FFO to adjusted net debt, and adjusted net debt to 
comparable EBITDA); Canadian Coal Fleet availability; the anticipated financial impact to be realized from the commercial 
operation of the South Hedland Power Station; our ability to establish that all conditions to commercial operation of our 
South Hedland Power Station have been satisfied with Fortescue Metals Group Limited (“FMG”); the Corporation’s plans and 
strategies  relating  to  repositioning  its  capital  structure  and  strengthening  its  balance  sheet  and  the  anticipated  debt 
reductions; the terms of the anticipated normal course issuer  bid  (“NCIB”), including the timing, number of shares to be 
repurchased  pursuant to the NCIB, and the acceptance  thereof by  the  Toronto Stock Exchange;  expected  governmental 
regulatory  regimes  and  legislation,  including  the  federal  carbon  price,  the  Government  of  Alberta’s  intended  shift  to  a 
capacity  market  and  renewable  auctions  and  the  expected  impacts  on  us  and  the  timing  of  the  implementation  of  such 
regimes and regulations, as well as the cost of complying with resulting regulations and laws; the expected results and impact 
of the Off-Coal Agreement (“OCA”) with the Government of Alberta on our business and financial performance; estimates 
of fuel supply and demand conditions and the costs of procuring fuel; the impact of load growth, increased capacity, and 
natural gas costs on power prices; expectations in respect of generation availability, capacity, and production; power prices 
in  Alberta,  Ontario,  and  the  Pacific  Northwest;  expected  financing  of  our  capital  expenditures;  the  anticipated  financial 
impact of increased carbon prices, including under the Carbon Competitiveness Incentive Regulation (“CCIR”) in Alberta; 
expectations in respect of our environmental initiatives including reductions to our emissions, environmental incidents, and 
energy use, including the reduction in greenhouse gas (“GHG”) emissions of 60 per cent or 12 million tonnes CO2e; nitrogen 
dioxide emissions being reduced 50 per cent;  our trading strategies and the risk involved in these strategies; estimates of 
future tax rates, future tax expense, and the adequacy of tax provisions; accounting estimates; anticipated growth rates in 
our  markets;  our  expectations  regarding  the  outcome  of  existing  or  potential  legal  and  contractual  claims,  regulatory 
investigations, and disputes; expectations regarding the renewal of collective bargaining agreements; expectations for the 
ability to access capital markets on reasonable terms;  

M2
M2  TRANSALTA CORPORATION 

TransAlta Corporation    |    2017  Annual Integrated Report 
 
 
Management’s Discussion and Analysis

the estimated impact of changes in interest rates and the value of the Canadian dollar relative to the US dollar, the Australian 
dollar, and other currencies in which we do business; our exposure to liquidity risk; expectations in respect of the global 
economic  environment  and  growing  scrutiny  by  investors  relating  to  sustainability  performance;  our  credit  practices; 
expected cost savings and payback periods following the implementation of Project Greenlight and productivity initiatives, 
including translating certain costs from our corporate transformation into significant long-term cost savings; the estimated 
contribution  of  Energy  Marketing  activities  to  gross  margin;  expectations  relating  to  the  performance  of  TransAlta 
Renewables Inc.’s (“TransAlta Renewables”) assets; expectations regarding our continued ownership of common shares of 
TransAlta Renewables; the refinancing of our upcoming debt maturities over the next two years; expectations regarding our 
de-leveraging strategy; expectations in respect of our community initiatives; impacts of future IFRS standards and the timing 
of the implementation of such standards; and amendments or interpretations by accounting standard setters prior to initial 
adoption of those standards. 

Factors that may adversely impact our forward-looking statements include risks relating to: fluctuations in market prices and 
our ability to contract our generation for prices that will provide expected returns; the regulatory and political environments 
in the  jurisdictions  in  which  we operate;  increasingly stringent environmental requirements  and changes  in, or  liabilities 
under,  these requirements; ability to  compete effectively  in  the anticipated  Alberta capacity  market;  changes  in  general 
economic conditions, including interest rates; operational risks involving our facilities, including unplanned outages at such 
facilities; accelerated growth, whether through acquisition or greenfield development; unanticipated operating conditions; 
disruptions in the transmission and distribution of electricity; the effects of weather; disruptions in the source of fuels, water, 
sun, or wind required to operate our facilities; natural or man-made disasters; physical risks related to climate change; the 
threat of terrorism and cyberattacks and our ability to manage such attacks; equipment failure and our ability to carry out or 
have completed the repairs in a cost-effective or timely manner; commodity risk management; industry risk and competition; 
fluctuations in the value of foreign currencies and foreign political risks; the need for additional financing and the ability to 
access financing at a reasonable cost and on reasonable terms; our ability to fund our growth projects; our ability to maintain 
our investment grade credit ratings; structural subordination of securities; counterparty credit risk; our ability to recover our 
losses  through  our  insurance  coverage;  our  provision  for  income  taxes;  outcomes  of  legal,  regulatory,  and  contractual 
proceedings involving the Corporation including those with FMG at South Hedland; outcomes of investigations and disputes; 
reliance on key personnel; labour relations matters; risks associated with development projects and acquisitions, including 
delays or changes in costs in the construction and commissioning of the Kent Hills 3 wind project; and the maintenance or 
adoption of enabling regulatory frameworks or the satisfactory receipt of applicable regulatory approvals for existing and 
proposed operations and growth initiatives, including as it pertains to coal-to-gas conversions. 

The foregoing risk factors, among others, are described in further detail in the Governance and Risk Management section 
of this MD&A and under the heading “Risk Factors” in our 2018 Annual Information Form. 

Readers are urged to consider these factors carefully in evaluating the forward-looking statements and are cautioned not 
to place undue reliance on these forward-looking statements. The forward-looking statements included in this document 
are made only as of the date hereof and we do not undertake to publicly update these forward-looking statements to 
reflect  new  information,  future  events,  or  otherwise,  except  as  required  by  applicable  laws.  In  light  of  these  risks, 
uncertainties, and assumptions, the forward-looking events might occur to a different extent or at a different time than 
we have described, or might not occur. We cannot assure that projected results or events will be achieved.  

An  additional  IFRS  measure  is  a  line  item,  heading,  or  subtotal  that  is  relevant  to  an  understanding  of  the  financial 
Additional IFRS Measures and Non-IFRS Measures 
statements but is not a minimum line item mandated under IFRS, or the presentation of a financial measure that is relevant 
to  an  understanding  of  the  financial  statements  but  is  not  presented  elsewhere  in  the  financial  statements.  We  have 
included line items entitled gross margin and operating income (loss) in our Consolidated Statements of Earnings (Loss) 
for the years ended Dec. 31, 2017, 2016, and 2015. Presenting these line items provides management and investors with 
a measurement of ongoing operating performance that is readily comparable from period to period.  

M3
TRANSALTA CORPORATION M3 

TransAlta Corporation    |    2017  Annual Integrated Report 
 
 
 
 
 
Management’s Discussion and Analysis

We evaluate our performance and the performance of our business segments using a variety of measures. Certain of the 
financial  measures  discussed  in  this  MD&A  are  not  defined  under  IFRS  and,  therefore,  should  not  be  considered  in 
isolation or as an alternative to or to be more meaningful than net earnings attributable to common shareholders or cash 
flow  from  operating  activities,  as  determined  in  accordance  with  IFRS,  when  assessing  our  financial  performance  or 
liquidity.  These  measures  may  not  be  comparable  to  similar  measures  presented  by  other  issuers  and  should  not  be 
considered  in  isolation  or  as  a  substitute  for  measures  prepared  in  accordance  with  IFRS.  Comparable  EBITDA,  FFO, 
comparable FFO, FCF, and cash flow generated by the business are non-IFRS measures that are presented in this MD&A. 
See the Reconciliation of Non-IFRS Measures and Discussion of Segmented Comparable Results sections of this MD&A 
for additional information.  

Business Model 
We are one of  Canada’s largest publicly traded power generators with over 107 years of operating  experience.  As at 
Our Business 
March  1,  2018,  we  own,  operate,  and  manage  a  highly  contracted  and  geographically  diversified  portfolio  of  assets 
representing  over  8,400  megawatts  (“MW”)(1) of  gross  generating  capacity  and  use  a  broad  range  of  generation  fuels 
including coal, natural gas, water, solar, and wind.  Our energy marketing team adds value by optimizing assets as market 
conditions change and by supplying products for customers. 

Our vision is to supply low cost, clean, reliable and firm electricity to our markets and customers. Our values are grounded 
Vision and Values 
in accountability, integrity, safety, respect for people, innovation and loyalty, which together create a strong corporate 
culture and allow all of our people to work on a common ground and understanding. These values are at the heart of our 
success. 

We deliver shareholder value by delivering solid returns through a combination of dividend yield and disciplined growth 
Strategy for Value Creation 
in cash flow per share, while striving for a low to moderate risk profile over the long term. Over the next 12 months we 
will continue to deleverage our balance sheet and ensure financial flexibility as we transition our coal-fired plants to gas-
fired plants and move into a capacity market in  Alberta.  Now that our cash flows have strengthened,  we  can allocate 
capital to growth, dividends and share re-purchases.   

Sustainability means ensuring that our financial returns consider short- and long-term economics, environmental impacts 
Material Sustainability Impacts 
and societal and community needs. We track the performance of 74 sustainability-related Key Performance Indicators 
(“KPIs”). We obtained a limited assurance report from Ernst & Young LLP over material KPIs. Our MD&A integrates our 
financial and sustainability reporting.   

(1)  We measure capacity as net maximum capacity (see Glossary of Key Terms for  a definition of this and other key terms), which is consistent with industry standards. 

Capacity figures represent capacity owned and in operation unless otherwise stated, and reflect the basis of consolidation of underlying assets. 

M4
M4  TRANSALTA CORPORATION 

TransAlta Corporation    |    2017  Annual Integrated Report 
 
 
 
 
                                                 
Year ended Dec. 31
Highlights
Consolidated Financial Highlights (1)(2) (2) 
Revenues 

Net earnings (loss) attributable to common shareholders

Cash flow from operating activities
Comparable EBITDA(1,2)
FFO(1,2)
FCF(1,2)

Net earnings (loss) per share attributable to common 
  shareholders, basic and diluted
FFO per share(1,2)
FCF per share(1,2)

Dividends declared per common share 

As at Dec. 31

Total assets
Total consolidated net debt(3)

Total long-term liabilities

Management’s Discussion and Analysis

2017

2,307

(190)

626

1,062

804

328

(0.66)

2.79

1.14

0.12

2017

10,304

3,363

4,311

2016

2,397

117

744

1,144

734

257

0.41

2.55

0.89

0.20

2016

10,996

3,893

5,116

2015

2,267

(24)

432

867

699

239

(0.09)

2.50

0.85

0.72

2015

10,947

4,251

5,704

2017 was a successful year for TransAlta. FCF totalled $328 million, up $72 million compared to last year.  FFO was $804 
million for 2017, compared to $734 million for 2016, an increase of $70 million, as most of our operations delivered year-
over-year improvement in performance. 

At the end of the year our total net debt was approximately $3.4 billion, down more than $500 million from the beginning 
of the year, due to the scheduled repayment of the US$400 million US Senior Note using existing liquidity. Our adjusted 
FFO to adjusted net debt and adjusted net debt to comparable EBITDA metrics improved significantly to 20.4 per cent 
and  3.6  times,  respectively.  Liquidity  available  at  the  end  of  the  year  remains  at  a  similar  level  compared  to  last  year 
following the payment received in November from FMG for the sale of the Solomon Power Station. 

Net  loss  attributable  to  common  shareholders  in  2017  was  $190  million  ($0.66  net  loss  per  share)  compared  to  net 
earnings of $117 million ($0.41 net earnings per share) in 2016, a reduction of more than $300 million. Earnings in 2017 
were  negatively  impacted  by  lower  comparable  EBITDA  of  $82  million,  as  well  as  the  reduction  of  the  US  tax  rate 
announced  in  December  ($105  million).  The  US  tax  rate  reduction  was  offset  by  an  increase  in  other  comprehensive 
income.  Higher  depreciation  of  $34  million  year-over-year  was  due  mostly  to  the  shortening  of  the  useful  lives  of 
Keephills  3  and  Genesee  3  and  to  the  commissioning  of  South  Hedland  in  July.    Net  earnings  in  2016  were  positively 
impacted by a $48 million (net of related income tax expense and non-controlling interest) positive impact in connection 
with the Mississauga recontracting and the pre-tax $94 million Keephlils Unit 1 provision reversal, of which $80 million 
impacted comparable EBITDA.  

(1)  These items are not defined under IFRS. Presenting these items from period to period provides management and investors with the ability to evaluate earnings trends 
more readily in comparison with prior periods’ results. Refer to the  Reconciliation of Non-IFRS Measures section of this MD&A for further discussion of these items, 
including, where applicable, reconciliations to measures calculated in accordance with IFRS. 

(2)  During the fourth quarter of 2017, we revised our approach to reporting adjustments to arrive at FFO, mainly to better represent FFO as a cash metric. Previously, FFO 
was adjusted to include, exclude, or to modify the timing of cash impacts related to adjustments made in arriving at comparable EBITDA. As a result, comparable EBITDA, 
FFO, and FCF for 2016 and 2015 have been revised accordingly. 

(3)  Total  consolidated  net  debt  includes  long-term  debt  including  current  portion,  amounts  due  under  credit  facilities,  tax  equity,  and  finance  lease  obligations,  net  of 
available cash and the fair value of economic hedging instruments on debt. See the table in the Capital Structure section of this MD&A for more details on the composition 
of net debt.

TRANSALTA CORPORATION M5 
M5

TransAlta Corporation    |    2017  Annual Integrated Report             
             
             
                
                 
                   
                 
                 
                 
             
             
                 
                 
                 
                 
                 
                 
                 
               
                
               
                
                
                
                
                
                
                
                
                
                     
                     
                     
                        
                        
                        
                        
                        
                        
 
 
 
 
                                                 
Management’s Discussion and Analysis

(1) 

(1)

Segmented Cash Flow Generated by the Business
Year ended Dec. 31

2017

2016

2015

Segmented cash inflow (outflow)

  Canadian Coal

  US Coal

  Canadian Gas

  Australian Gas

  Wind and Solar

  Hydro

Generation cash inflow 

  Energy Marketing

  Corporate 

Total comparable cash inflow

175

33

221

127

201

61

818

39

(108)

749

198

21

235

99

180

53

786

25

(95)

716

177

41

194

114

163

38

727

17

(102)

642

Segmented  cash  flows  generated  by  the  business  measures  the  net  cash  generated  by  each  of  our  segments  after 
sustaining and productivity capital expenditures, reclamation costs, and provisions. It also excludes non-cash mark-to-
market gains or losses. This is the annual cash flows available to pay our interest and cash taxes, distributions to our non-
controlling partners and dividends to our preferred shareholders, grow the business, pay down debt and return capital to 
our shareholders. Cash flow generated by the business totalled $749 million in 2017, up $33 million over 2016 and $74 
million over 2015 in  a low price environment in  most markets in  North  America. We achieved this through a prudent 
contracting approach, disciplined cost control and sustaining capital expenditure allocation. 

Our  strategic  focus  continues  to  be  strengthening  our  balance  sheet,  improving  our  operating  performance,  and 
Significant Events
progressing our transition to clean power generation. We made the following progress throughout the year: 
▪  On March 1, 2018, we announced our intention to seek Toronto Stock Exchange acceptance of a normal course issuer 

▪ 

bid (“NCIB”). See the Significant and Subsequent Events section of this MD&A for further details. 
In April 2017, we announced our plan to transition to gas and renewables generation with the retirement of Sundance 
Unit 1 and the mothballing of Sundance Unit 2 at the end of 2017, as well as the conversion of Sundance Units 3 to 6 
and Keephills Units 1 and 2 from coal-fired generation to gas-fired generation between 2021 and 2022. Subsequent 
to the September 2017 Balancing Pool’s announcement of the termination of the PPAs in respect of Sundance B and 
C, we announced the acceleration of the conversion of Sundance Units 3 to 6 and Keephills Units 1 and 2 from coal-
fired generation in the 2021 to 2022 timeframe, a year earlier than originally planned. As a result of the termination 
of Sundance B and C PPAs, we determined to mothball additional capacity starting in April 2018. The coal-fired plants 
operated by us, once converted to gas, are anticipated to be able to run through to 2031 to 2039, which significantly 
lengthens their asset lives. See the Significant and Subsequent Events section of this MD&A for further details. 
▪  During the fourth quarter, we entered into a Letter of Intent to construct a 120-kilometre natural gas pipeline to our 
generating units at Sundance and Keephills, to facilitate our strategy of converting our coal units to natural gas units. 
See the Significant and Subsequent Events section of this MD&A for further details. 

▪  During the third quarter, we achieved commercial operation on our South Hedland Power Station. During the fourth 
quarter, we received formal notice of termination of the South Hedland PPA from a subsidiary of Fortescue Metals 
Group Limited (“FMG”), on the basis that the South Hedland Power Station had yet to achieve commercial operation. 
We  remain  confident  that  all  conditions  required  to  establish  commercial  operations,  including  all  performance 
conditions,  have  been  achieved  under  the  terms  of  the  PPA.  The  project  is  expected  to  generate  approximately  
$80  million  of  comparable  EBITDA  annually.  TransAlta  Renewables  converted  the  Class  B  shares  we  owned  into 
common shares and also increased  its monthly dividend by  approximately  seven  per cent.  See the Significant and 
Subsequent Events section of this MD&A for further details.  

(1)  This item is not defined under IFRS. Presenting these items from period to period provides management and investors with the ability to evaluate earnings trends more 
readily in comparison with prior periods’ results. Refer to the Reconciliation of Non-IFRS Measures section of this MD&A for further discussion of these items, including, 
where applicable, reconciliations to measures calculated in accordance with IFRS.

M6
M6  TRANSALTA CORPORATION 

TransAlta Corporation    |    2017  Annual Integrated Report 
 
                          
                            
                            
                            
                               
                               
                          
                            
                            
                          
                               
                            
                          
                            
                            
                            
                               
                               
                          
                            
                            
                            
                               
                               
                        
                             
                          
                          
                            
                            
 
                                                 
Management’s Discussion and Analysis

▪ 

In November, FMG repurchased the Solomon Power Station. We received approximately  US$325 million. See the 
Significant and Subsequent Events section of this MD&A for further details. 

▪  During the second quarter, we entered into a long-term contract for the 17.25 MW Kent Hills 3 expansion project 

located in New Brunswick, which is expected to begin the construction phase in the spring of 2018.   
In May, we repaid $US400 million of senior debt using existing liquidity.  

▪ 
▪  During  the  third  quarter,  TransAlta Renewables’  indirect  majority-owned  subsidiary,  Kent  Hills Wind  LP,  closed  a 
$260 million project-level financing. The bonds are amortizing and bear interest at an annual rate of 4.454 per cent, 
payable quarterly and maturing Nov. 30, 2033. The proceeds from the financing were used to early repay maturing 
debt and will fund the expansion of the project. In early 2018, we announced our intention to early repay $US500 
million of Senior Notes. See the Significant and Subsequent Events section of this MD&A for further details.  

▪  During the third quarter, TransAlta Renewables entered into a syndicated credit agreement giving it access to $500 
million in direct borrowings. We reduced our syndicated credit facility by the same amount. Our consolidated liquidity 
remains unchanged. Both facilities expire in 2021. 
In  March  2017,  we  closed  the  sale  of  our  51  per  cent  interest  in  the  Wintering  Hills  merchant  wind  facility  for 
approximately $61 million. The sale reduced our merchant exposure in Alberta and the proceeds were used to repay 
debt. 

▪ 

▪  During  the  second  quarter,  we  settled  the  contract  indexation  dispute  with  the  Ontario  Electricity  Financial 

Corporation (“OEFC”). The settlement consisted of a $34 million payment by the OEFC to TransAlta. 

We evaluate our performance and the performance of our business segments using a variety of measures. Comparable 
Discussion of Consolidated Financial Results
figures are not defined under IFRS. Those discussed below, and elsewhere in this MD&A, are not defined under IFRS and, 
therefore,  should  not  be  considered  in  isolation  or  as  an  alternative  to  or  to  be  more  meaningful  than  net  earnings 
attributable to common shareholders or cash flow from operating activities, as determined in accordance with IFRS, when 
assessing  our  financial  performance  or  liquidity.  These  measures  are  not  necessarily  comparable  to  a  similarly  titled 
measure  of  another  company.  Each  business  segment  assumes  responsibility  for  its  operating  results  measured  to 
comparable  EBITDA  and  cash  flows  generated  by  the  business.  Gross  margin  is  also  a  useful  measure  as  it  provides 
management  and  investors  with  a  measurement  of  operating  performance  that  is  readily  comparable  from  period  to 
period.  

EBITDA is a widely adopted valuation metric and an important metric for management that represents our core business 
Comparable EBITDA
profitability. Interest, taxes, and depreciation and amortization are not included, as differences in accounting treatments 
may distort our core business results. In addition, we reclassify certain transactions to facilitate the discussion on the 
performance of our business:  
(i) 

Certain assets we own in Canada and Australia are fully contracted and recorded as finance leases under IFRS. We 
believe it is more appropriate to reflect the payments we receive under the contracts as a capacity payment in our 
revenues instead of as finance lease income and a decrease in finance lease receivables. We depreciate these assets 
over their expected lives;  

(ii)  We also reclassify the depreciation on our mining equipment from fuel and purchased power to reflect the actual 

(iii) 

cash cost of our business in our comparable EBITDA;  
In  December  2016,  we  agreed  to  terminate  our  existing  arrangement  with  the  Independent  Electricity  System 
Operator (“IESO”) relating to our Mississauga cogeneration facility in Ontario and entered into a new Non-Utility 
Generator (“NUG”) Enhanced Dispatch Contract (the “NUG Contract”) effective Jan. 1, 2017. Under the new NUG 
Contract, we receive fixed monthly payments until December 31, 2018 with no delivery obligations. Under IFRS, for 
our  reported  results  in  2016,  as  a  result  of  the  NUG  Contract,  we  recognized  a  receivable  of  $207  million 
(discounted),  a  pre-tax  gain  of  approximately  $191  million  net  of  costs  to  mothball  the  units,  and  accelerated 
depreciation  of  $46  million.  In  2017  and  2018,  on  a  comparable  basis,  we  record  the  payments  we  receive  as 
revenues as a proxy for operating income, and continue to depreciate the facility until Dec. 31, 2018; and 

(iv)  On  commissioning  of  South  Hedland  Power  Station,  we  prepaid  approximately  $74  million  of  electricity 
transmission and distribution costs. Interest income is recorded on the prepaid funds. We reclassify this interest 
income as reduction in the transmission and distribution costs expensed each period to reflect the net cost to the 
business.  

TRANSALTA CORPORATION M7 
M7

TransAlta Corporation    |    2017  Annual Integrated Report 
Management’s Discussion and Analysis

A  reconciliation  of  net  earnings  (loss)  attributable  to  common  shareholders  to  comparable  EBITDA  results  is  set  out 
below: 

(1)

2016

(1)

2015

Year ended Dec. 31

1

Net earnings (loss) attributable to common shareholders

      Net earnings attributable to non-controlling interests

      Preferred share dividends

Net earnings (loss) 

Adjustments to reconcile net income to comparable EBITDA

      Income tax expense

      Gain on sale of assets and other

      Foreign exchange (gain) loss

      Net interest expense

      Depreciation and amortization

Comparable reclassifications

      Decrease in finance lease receivables 

      Mine depreciation included in fuel cost

      Australian interest income

Adjustments to earnings to arrive at comparable EBITDA
      Impacts to revenue associated with certain 
        de-designated and economic hedges
      Impacts associated with Mississauga recontracting(2)

      Asset impairment charge (reversal)

      Non-comparable portion of insurance recovery received

      Maintenance costs related to the Alberta flood of 
        2013, net of insurance recoveries

(1)

2017

(190)

42

30

(118)

64

(2)

1

247

635

59

75

2

2

77

20

-

-

117

107

52

276

38

(4)

5

229

601

57

65

-

26

(177)

28

-

-

(24)

94

46

116

105

(262)

(4)

251

545

23

62

-

60

-

(2)

(18)

(9)

867

Comparable EBITDA

1,062

1,144

Comparable EBITDA decreased by $82 million for the year ended Dec. 31, 2017, compared to 2016. The 2016 results were 
positively impacted by an $80 million non-cash accounting provision reversal relating to the Keephills 1 outage in 2013.  

Comparable EBITDA at our US Coal, Canadian Gas, Australian Gas, and Wind and Solar segments were all up year over year, 
and collectively accounted for an increase of $95 million of comparable EBITDA. At US Coal, lower coal transportation costs 
and  favourable  mark-to-market  on  economic  hedges  that  do  not  qualify  for  hedge  accounting  contributed  to  higher 
results. Our Canadian Gas operations benefited from the settlement of the contract indexation dispute with the OEFC 
relating to the Ottawa and Windsor generating facilities, totalling $34 million, as well as the positive impact of the early 
shut down of our Mississauga gas plant in Ontario. Australian Gas’ improved results were mainly due to the commissioning 
of our South Hedland  Power Station  in the third quarter. Higher volumes, lower cost of sales from renewable energy 
certificates, and lower operations, maintenance, and administration expenses were primary drivers of higher comparable 
EBITDA at our Wind and Solar segment.  

(1)  During the fourth quarter of 2017, we revised the way in which comparable EBITDA is reconciled to net earnings. Accordingly, prior years’ results have been revised. 
(2)  Impacts  associated  with  Mississauga  recontracting  for  the  year  ended  Dec.  31,  2017,  are  as  follows:  revenue  ($101  million),  fuel  and  purchased  power  and  de-
designated  hedges  ($12  million),  operations,  maintenance,  and  administration  ($3  million),  and  recovery  related  to  renegotiated  land  lease  ($9  million).  Impacts 
associated with Mississauga recontracting for the year ended Dec. 31, 2016, are as follows: net other operating income ($191 million) and fuel and purchased power 
and de-designated hedges ($14 million).

M8
M8  TRANSALTA CORPORATION 

TransAlta Corporation    |    2017  Annual Integrated Report 
 
                   
                    
                      
                       
                    
                       
                       
                       
                       
                   
                    
                    
                       
                       
                    
                         
                         
                   
                          
                          
                         
                    
                    
                    
                    
                    
                    
                       
                       
                       
                       
                       
                       
                          
                           
                           
                          
                       
                       
                       
                   
                            
                       
                       
                         
                           
                            
                      
                           
                            
                         
                
                
                    
 
 
 
 
 
                                                 
Management’s Discussion and Analysis

Comparable EBITDA for Canadian Coal was down $149 million from 2016.  Comparable EBITDA in 2016 was positively 
impacted by the reversal of an $80 million non-cash accounting provision. In 2017, we recognized $40 million for OCA 
payments  that  were  more  than  offset  by  lower  prices  due  to  the  rolling  off  of  higher  priced  hedges,  higher  coal  costs 
caused by a higher strip ratio and lower equipment availability at our mine, and higher environmental compliance costs. 
EBITDA in Energy Marketing was down $7 million in 2017 compared to 2016.  Results were impacted by unusual weather 
in the Northeast and the Pacific Northwest in the first quarter of 2017, but showed steady improvement in subsequent 
quarters.  

Our  overall  results  in  2017  also  included  costs  of  approximately  $29  million  relating  to  Project  Greenlight,  our 
transformation  initiative.  We  estimate  that  the  Project  Greenlight  initiatives  generated  between  $35  million  to  $45 
million of reduction in operations, maintenance, and administration (“OM&A”) expenses and fuel costs or efficiency gains.  

FFO is an important metric as it provides a proxy for cash generated from operating activities before changes in working 
Funds from Operations and Free Cash Flow 
capital,  and  provides  the  ability  to  evaluate  cash  flow  trends  in  comparison  with  results  from  prior  periods.  FCF  is  an 
important  metric  as  it  represents  the  amount  of  cash  that  is  available  to  invest  in  growth  initiatives,  make  scheduled 
principal repayments on debt, repay maturing debt, pay common share dividends, or repurchase common shares. Changes 
in  working  capital  are  excluded  so  FFO  and  FCF  are  not  distorted  by  changes  that  we  consider  temporary  in  nature, 
reflecting, among other things, the impact of seasonal factors and timing of receipts and payments. FFO per share and 
FCF per share are calculated using the weighted average number of common shares outstanding during the period.  
 (( 

The table below reconciles our cash flow from operating activities to our FFO and FCF.. (1 

) 

Year ended Dec. 31

Cash flow from operating activities

Change in non-cash operating working capital balances

Cash flow from operations before changes in working capital

Adjustment:

Decrease in finance lease receivable

Other 

FFO

Deduct:

Sustaining capital 

Productivity capital

Dividends paid on preferred shares

Distributions paid to subsidiaries' non-controlling interests

Other

FCF
Weighted average number of common shares outstanding in the year

FFO per share
FCF per share(1)

2017(1)

2016(1)

2015(1)

626

114

740

59

5

804

(235)

(24)

(40)

(172)

(5)

328

288

2.79

1.14

744

(73)

671

57

6

734

(272)

(8)

(42)

(151)

(4)

257

288

2.55

0.89

432

242

674

23

2

699

(305)

(6)

(46)

(99)

(4)

239

280

2.50

0.85

The increase in FCF was driven by year-over-year stronger cash flow from operations of $69 million and lower sustaining 
capital  expenditures.  This  was  partly  offset  by  higher  distributions  to  our  non-controlling  partners  at  our  gas  and 
renewables businesses and higher capital allocated to productivity capital. FCF in 2016 and 2015 was also reduced by 
payments to the Market Surveillance Administrator (“MSA”) of $25 million and $31 million, respectively. 

(1)  In the first quarter of 2017, we began deducting productivity capital in calculating FCF.  

TRANSALTA CORPORATION M9 
M9

TransAlta Corporation    |    2017  Annual Integrated Report 
 
                        
                        
                        
                        
                          
                        
                        
                        
                        
                           
                           
                           
                              
                              
                              
                        
                        
                        
                       
                       
                       
                          
                             
                             
                          
                          
                          
                       
                       
                          
                             
                             
                             
                        
                        
                        
                        
                        
                        
                       
                       
                       
                       
                       
                       
 
 
                                                 
Management’s Discussion and Analysis

The table below bridges our comparable EBITDA to our FFO and FCF.1 

Year ended Dec. 31

Comparable EBITDA

Provisions 

Unrealized (gains) losses from risk management activities

Interest expense

Current income tax expense

Realized foreign exchange gain (loss)

Decommissioning and restoration costs settled

Gain on curtailment and amendment of employee future benefit plans

Other cash and non-cash items

FFO

Deduct:

Sustaining capital 

Productivity capital 

Dividends paid on preferred shares

Distributions paid to subsidiaries' non-controlling interests

Other

FCF

2017(1)

1,062

(7)

(28)

(218)

(23)

15

(19)

-

22

804

(235)

(24)

(40)

(172)

(5)

328

2016(1)

1,144

(114)

4

(229)

(23)

(5)

(23)

-

(20)

734

(272)

(8)

(42)

(151)

(4)

257

2015(1)

867

101

9

(233)

(18)

9

(24)

(8)

(4)

699

(305)

(6)

(46)

(99)

(4)

239

(1) During the fourth quarter of 2017 we removed certain comparable adjustments that reflect timing of payments and receipts, accordingly prior years’ results have been 

restated. 

M10
M10  TRANSALTA CORPORATION 

TransAlta Corporation    |    2017  Annual Integrated Report 
 
                    
                    
                        
                             
                       
                        
                          
                              
                              
                       
                       
                       
                          
                          
                          
                           
                             
                              
                          
                          
                          
                                
                                
                             
                           
                          
                             
                        
                        
                        
                       
                       
                       
                          
                             
                             
                          
                          
                          
                       
                       
                          
                             
                             
                             
                        
                        
                        
 
 
 
                                                 
Segmented Comparable Results
 (1)

Canadian Coal
Year ended Dec. 31

Availability (%)

Contract production (GWh)

Merchant production (GWh)

Total production (GWh)
Gross installed capacity (MW)(1)

Revenues

Fuel and purchased power

Comparable gross margin

Operations, maintenance, and administration

Restructuring provision

Taxes, other than income taxes

Net other operating income

Comparable EBITDA

Deduct:

   Sustaining capital:

      Routine capital

      Mine capital

      Finance leases

      Planned major maintenance

      Total sustaining capital expenditures

      Productivity capital

      Total sustaining and productivity capital

Management’s Discussion and Analysis

2017

82.0

18,683

2016

85.3

19,823

3,786

                         3,787 

2015

84.3

20,256

3,827

                      22,469 

                      23,610 

                      24,083 

                         3,791 

                         3,791 

                         3,786 

                             999 

                         1,048 

                             912 

                             510 

                             386 

                             379 

                             489 

                             662 

                             533 

                             192 

                             178 

                             194 

                                    - 

                                    - 

                                11 

                                13 

                                13 

                                12 

                              (40)                                  (2)                                  (7)

                             324 

                             473 

                             323 

                                22 

                                33 

                                48 

                                28 

                                23 

                                25 

                                14 

                                13 

                                10 

                                54 

                             100 

                             107 

118

12

130

169

1

170

190

2

192

      Provisions 

                                   5 

                                85 

                              (64)

      Unrealized (gains) losses on risk management activities

                                   3 

                                   7 

                                   4 

      Decommissioning and restoration costs settled

                                11 

                                13 

                                14 

Canadian Coal cash flow

175

198

177

2017 
Availability  in  2017  was  down  compared  to  2016  due  to  higher  unplanned  outages  and  derates  due  to  coal  supply 
disruptions at our mine during the last half of the year, which also resulted in lower production of 1,141 gigawatt hours 
(“GWh”) year-over-year. 

Comparable EBITDA for the year ended Dec. 31, 2017, decreased $149 million compared to 2016, due to the $80 million 
reversal of the Keephills 1 provision in the fourth quarter of 2016. As expected, fuel and purchased power was impacted 
by  higher coal  costs  related  to  the  expected  higher strip  ratio  and  higher environmental compliance  costs  in  2017.  In 
addition, we incurred additional costs in the third quarter to mitigate the impact of lower productivity at our mine. OM&A 
increased $14 million year-over-year due mostly to contractor spend on Project Greenlight improvement initiatives ($20 
million) and higher material and operating expenses ($5 million), and was partially offset by lower compensation ($11 
million). See the Strategic Growth and Corporate Transformation section of this MD&A for further details. This year’s 
results also included $40 million related to OCA payments included in net other operating income. We received our OCA 
payment in the third quarter.  

(1)  2017 includes 560 MW for Sundance Units 1 and 2, which were both shut down and mothballed, on Jan. 1, 2018. 

TRANSALTA CORPORATION M11 
M11

TransAlta Corporation    |    2017  Annual Integrated Report 
 
                           
                           
                           
                     
                     
                     
                        
                        
                            
                            
                            
                               
                                  
                                  
                            
                            
                            
                            
                            
                            
 
 
  
                                                 
Management’s Discussion and Analysis

Sustaining and productivity capital expenditures for the year ended Dec. 31, 2017, were lower by $40 million compared 
to 2016, mainly due to the timing of major outages in 2017 and pit stops executed in 2016 on our Sundance 1 and 2 units.  

2016 
Production  for  the  year  ended  Dec.  31,  2016,  decreased  473  GWh  compared  to  2015,  primarily  due  to  higher  paid 
curtailments in the first half of the year and higher levels of economic dispatching, in both cases caused by lower prices in 
Alberta. This was partially offset by lower planned outages and derates. Unplanned outages remained at a similar level 
compared to last year. 

Comparable EBITDA for the year ended Dec. 31, 2016, increased $150 million compared to 2015, primarily due to the 
reversal of the $80 million provision relating to the Keephills 1 outage in 2013. The year-over-year impact to comparable 
EBITDA  of  this  provision  was  $139  million,  as  2015’s  comparable  EBITDA  was  reduced  by  $59  million  due  to  this 
provision, which also included $11 million of restructuring costs. Our high level of contracted generation and hedging 
strategy largely mitigated the impact of low power prices in Alberta. Comparable EBITDA was also positively impacted 
by a reduction in our operations, maintenance, and administration costs. 

For the year ended Dec. 31, 2016, sustaining capital expenditures decreased by $21 million compared to 2015, mainly 
due to lower expenditures on our turnaround outages executed on two of our operated units and deferral of discretionary 
projects into 2017.   

M12
M12  TRANSALTA CORPORATION 

TransAlta Corporation    |    2017  Annual Integrated Report 
 
 
 
 
1 

US Coal
Year ended Dec. 31

Availability (%)
Adjusted availability (%)(1)

Contract sales volume (GWh)

Merchant sales volume (GWh)

Purchased power (GWh)

Total production (GWh)

Gross installed capacity (MW)

Revenues

Fuel and purchased power

Comparable gross margin

Operations, maintenance, and administration

Restructuring provision

Taxes, other than income taxes

Comparable EBITDA

Deduct:

   Sustaining capital:

      Routine capital

      Finance leases

      Planned major maintenance

      Total sustaining capital expenditures

      Productivity capital

Management’s Discussion and Analysis

2017

66.3

86.2

2016

88.1

88.9

3,609

                         3,535 

5,488

                         4,896 

2015

87.4

89.5

2,868

5,484

                       (3,625)                        (3,854)                        (3,329)

                         5,472 

                         4,577 

                         5,023 

                         1,340 

                         1,340 

                         1,340 

                             437 

                             380 

                             432 

                             293 

                             281 

                             316 

                             144 

                                99 

                             116 

                                51 

                                54 

                                50 

                                    - 

                                    - 

                                   1 

                                   4 

                                   4 

                                   3 

                                89 

                                41 

                                62 

                                   3 

                                   3 

                                   2 

                                   3 

                                   3 

                                   3 

                                29                                  11 

                                10 

                                35 

                                17 

                                15 

                                   3 

                                    - 

                                    - 

      Total sustaining and productivity capital expenditures

                                38 

17

15

      Provisions

                                    - 

                                   7 

                                 (7)

      Unrealized (gains) losses on risk management activities

                                10 

                              (13)                                    4 

      Decommissioning and restoration costs settled

US Coal cash flow

                                   8 

                                   9 

                                   9 

                                33 

21

41

2017 
Availability was down compared to 2016 due to a forced outage on Centralia Unit 1 in January. Both Centralia Units were 
taken out of service in February due to economic dispatch from low prices in the Pacific Northwest market. We performed 
major  maintenance  on  both  units  during  that  time.  The  lower  availability  had  a  nominal  impact  on  our  results  as  our 
contractual obligations were supplied with less expensive power purchased in the market during the first half of the year.   

Production  was  up  895  GWh  in  2017  compared  to  2016  due  mainly  to  lower  economic  dispatching  caused  by  higher 
prices.  The increased generation was partially offset by higher unplanned and planned maintenance. 

Comparable EBITDA increased by $48 million compared to 2016 due to increased sales volumes that led to increased 
margins from higher market prices and higher contract rates. Lower coal transportation costs and the favourable impact 
of mark-to-market (year-over-year gain of $13 million) on certain forward financial contracts that do not qualify for hedge 
accounting also positively impacted Comparable EBITDA.   

Sustaining and productivity capital expenditures for year ended Dec. 31, 2017, increased $21 million compared to 2016 
due to planned outages executed during the second quarter of 2017. Productivity capital was invested in the installation 

TRANSALTA CORPORATION M13 
M13

TransAlta Corporation    |    2017  Annual Integrated Report 
                           
                           
                           
                           
                           
                           
                        
                        
                        
                        
                               
                               
                               
                               
 
 
 
 
 
                                                 
Management’s Discussion and Analysis

of inspection equipment to optimize heat rates on coal and improve air distribution systems. See the Strategic Growth 
and Corporate Transformation section of this MD&A for further details. 

2016 
Production was down 446 GWh in 2016 compared to 2015, due mainly to increased economic dispatching in the first half 
of the year caused by lower prices. We supplied our contractual obligations by buying less expensive power in the market 
during such periods.  

Comparable EBITDA decreased by $19 million compared to 2015 as a result of reduced margins due to lower prices and 
the  unfavourable  impact  of  mark-to-market  on  certain  forward  financial  contracts  that  do  not  qualify  for  hedge 
accounting. This was partially offset by lower coal transportation costs and a reduction in our coal impairment charges. 

Sustaining  capital  expenditures  for  2016  were  $2  million  higher  compared  to  2015,  primarily  due  to  higher  planned 
outages. 

Canadian Gas
Year ended Dec. 31

Availability (%)

Contract production (GWh)

Merchant production (GWh)

Total production (GWh)
Gross installed capacity (MW)(1)

Revenues

Fuel and purchased power

Comparable gross margin

Operations, maintenance, and administration

Restructuring provision

Taxes, other than income taxes

Comparable EBITDA

Deduct:

   Sustaining capital:

      Routine capital

      Planned major maintenance

      Total sustaining capital expenditures

      Productivity capital

      Total sustaining and productivity capital expenditures

      Provisions

      Unrealized (gains) losses on risk management activities

      Decommissioning and restoration costs settled

Canadian Gas cash flow

1 

2017 

2017

91.6

1,504

2016

95.7

2,784

2015

95.6

3,697

                             244 

288

                         1,535 

                         1,748 

                         3,072 

                         5,232 

                             953 

                         1,057 

                         1,057 

                             430 

                             470 

                             486 

                             113 

                             171 

                             204 

                             317 

                             299 

                             282 

                                53 

                                54 

                                67 

                                    - 

                                    - 

                                   1 

                                   1 

                                   1 

                                   3 

                             263 

                             244 

                             211 

                                   8 

                                   7 

                                   4 

                                22 

                                   5 

                                19 

                                30 

                                12 

                                23 

                                   2 

                                    - 

                                    - 

                                32 

12

23

                                   3 

                                 (2)                                  (1)

                                   7 

                                 (2)                                  (6)

                                    - 

                                   1 

                                   1 

221

235

194

(1) 2017 excludes capacity of Mississauga, which was mothballed in early 2017. All years Include production capacity for the Fort Saskatchewan power station, which has 
been accounted for as a finance lease. During 2015, operational control of our Poplar Creek facility was transferred to Suncor Energy (“Suncor”). We continue to own a 
portion of the facility and have included our portion as a part of gross capacity measures. Poplar Creek was removed from our availability and production metrics effective 
Sept. 1, 2015. 

M14
M14  TRANSALTA CORPORATION 

TransAlta Corporation    |    2017  Annual Integrated Report 
 
 
 
 
                           
                           
                           
                        
                        
                        
                            
                               
                               
                            
                            
                            
                                                 
Management’s Discussion and Analysis

Availability decreased approximately four per cent compared to 2016, primarily due to a planned major inspection at our 
Sarnia plant, the conversion to the peaking plant at Windsor and an unplanned steam turbine outage at Windsor. 

Production in 2017 decreased 1,324 GWh compared to 2016, primarily due to changes in contracts at Mississauga and 
Windsor at the end of 2016. 

Comparable EBITDA for 2017 increased by $19 million compared to 2016, primarily due to the settlement with the OEFC 
of  the  retroactive  adjustment  to  price  indices  at  Ottawa  and  Windsor  and  the  positive  impact  from  the  temporary 
shutdown at our Mississauga gas facility, partially offset by unfavourable changes on unrealized mark-to-market positions 
in  gas contracts that do not qualify  for hedge accounting and  the reduction in  earnings  from the change to a peaking 
contract at our Windsor facility.  The Mississauga, Ottawa, Windsor and Fort Saskatchewan facilities are owned through 
our 50.01 per cent interest in TA Cogeneration L.P. (“TA Cogen”). 

Sustaining capital for the year ended Dec. 31, 2017, increased $18 million compared to the same period in 2016, primarily 
due  to  the  planned  major  inspection  at  Sarnia  and  the  base  to  cycling  conversion  project  at  Windsor,  which  was 
undertaken to increase its flexibility to respond to market prices.  

2016 
Production for the year decreased 2,160 GWh compared to 2015, primarily due to the restructuring of our contract with 
Suncor at the Poplar Creek facility in the third quarter of 2015 and  higher economic dispatching in Ontario driven by 
lower prices. 

Comparable  EBITDA  for  2016  increased  by  $33  million  compared  to  2015,  as  a  result  of  a  year-over-year  change  in 
unrealized  mark-to-market  on  our  gas  position,  cost-efficiency  initiatives  and  favourable  pricing  in  Ontario  from  our 
contracts for power and gas. The recontracting of the Poplar Creek facility reduced our OM&A costs by more than $9 
million in 2016, compared to 2015. 

Sustaining capital totalled $12 million in 2016, a decrease of $11 million. In 2015, we refurbished two engines in Ontario. 
The change in our Poplar Creek operation also lowered our sustaining capital by approximately $7 million compared to 
2015. 

M15
TRANSALTA CORPORATION M15 

TransAlta Corporation    |    2017  Annual Integrated Report 
 
 
 
 
 
 
Management’s Discussion and Analysis

Australian Gas 
Year ended Dec. 31

Availability (%)

Contract production (GWh)
Gross installed capacity (MW)(1)

Revenues

Fuel and purchased power

Comparable gross margin

Operations, maintenance, and administration

Taxes, other than income taxes

Comparable EBITDA

Deduct:

   Sustaining capital:

      Routine capital

      Planned major maintenance

      Total sustaining capital

      Other

Australian Gas cash flow

2017

93.4

1,803

2016

93.1

1,529

2015

92.4

1,381

                             450 

                             425 

                             348 

                             180 

                             174 

                             163 

                                12 

                                20 

                                20 

                             168 

                             154 

                             143 

                                31 

                                25 

                                21 

                                    - 

                                   1 

                                    - 

                             137 

                             128 

                             122 

                                   9 

                                   3 

                                   4 

                                   1 

                                11 

                                   4 

                                10 

                                14 

                                   8 

                                    - 

                                15 

                                    - 

127

99

114

2017 
Production for 2017 increased by 274 GWh compared to 2016 due to the commissioning of our South Hedland  Power 
Station on July 28, 2017, and an increase in customer load, partially offset by the early termination of our lease for our 
Solomon  Power  Station  in  November  2017.  As  a  result  of  the  early  termination,  we  received  US$325  million  ($417 
million) in the fourth quarter of 2017. Due to the nature of our contracts, the increase in customer load did not have a 
significant financial impact on our results as our contracts are structured as capacity payments with a pass-through of fuel 
costs. 

Comparable EBITDA was up $9 million for 2017 compared to 2016 due to the commissioning of our South Hedland Power 
Station in July 2017, which was partially offset by the early termination of our lease for our Solomon Power Station in 
November 2017.  

2016 
Production for 2016 increased 148 GWh compared to 2015, mostly due to an increase in customer load. Due to the nature 
of  our  contracts,  the  increase  did  not  have  a  significant  financial  impact  as  our  contracts  are  structured  as  capacity 
payments with a pass-through of fuel costs.  

Comparable EBITDA for 2016 increased by $6 million compared to 2015, mainly due to the addition of capacity payments 
for the gas conversion project at our Solomon gas plant that was completed in May 2016, as well as the uplift from our natural 
gas pipeline that was commissioned in March 2015. The change in value of the Australian dollar had limited impact on our 
comparable EBITDA in 2016.  

Sustaining capital increased by $6 million compared to 2015, mainly driven by maintenance projects on two engines in 
2016 compared to maintenance projects on only one engine in 2015.  

(1)  2016 and 2017 figures include production capacity for the Solomon Power Station, which was accounted for as a finance lease. On Nov. 1, 2017, FMG repurchased 

the Solomon Power Station. The 2017 figures include capacity for the South Hedland Power Station, which achieved commercial operations on July 28, 2017. 

M16
M16  TRANSALTA CORPORATION 

TransAlta Corporation    |    2017  Annual Integrated Report 
                           
                           
                           
                        
                        
                        
                            
                               
                            
 
 
 
 
 
                                                 
Wind and Solar 
Year ended Dec. 31

Availability (%)

Contract production (GWh)

Merchant production (GWh)

Total production (GWh)
Gross installed capacity (MW)(1)

Revenues

Fuel and purchased power

Comparable gross margin

Operations, maintenance, and administration

Taxes, other than income taxes

Net other operating income

Comparable EBITDA

Deduct:

   Sustaining capital:

      Routine capital

      Planned major maintenance

      Total sustaining capital expenditures

      Productivity capital

      Total sustaining and productivity capital

      Provisions

Wind and Solar cash flow

Management’s Discussion and Analysis

2017

95.8

2,362

1,098

2016

94.9

2,301

1,212

2015

95.8

2,146

1,060

                         3,460 

                         3,513 

                         3,206 

                         1,363 

                         1,408 

                         1,424 

                             287 

                             272 

                             250 

                                17 

                                18 

                                19 

                             270 

                             254 

                             231 

                                48 

                                52 

                                48 

                                   8 

                                   8 

                                   7 

                                    - 

                                 (1)                                     - 

                             214 

                             195 

                             176 

                                   1 

                                   2 

                                   1 

                                10 

                                11 

                                12 

                                11 

                                13 

                                13 

                                   2 

                                   3 

                                    - 

13

16

13

                                    - 

                                 (1)                                     - 

201

180

163

2017 
Production for 2017 decreased by 53 GWh compared  to 2016 as we sold the Wintering Hills wind facility in the first 
quarter of 2017. Generation from our other facilities was slightly higher than last year. 

Comparable EBITDA for 2017 increased $19 million compared to 2016, primarily driven by higher volumes at contracted 
facilities, price increases on our contracted assets, higher prices in Alberta on our uncontracted assets and lower costs in 
our long-term service agreements. 

2016 
Production  for  2016  increased  by  307  GWh  compared  to  2015,  mainly  due  to  the  full-year  contribution  from  assets 
acquired during the second half of 2015, partly offset by lower wind resources negatively impacting generation across 
Canada.  

Comparable EBITDA for 2016 increased $19 million compared to 2015,  as assets acquired in the second half of 2015 
contributed approximately $23 million to the increase. Lower merchant prices in Alberta and lower generation in Canada 
negatively impacted our EBITDA.  

(1) The 2017 figure excludes capacity for the Wintering Hills wind facility, which was sold on March 1, 2017. Our 2015 capacity includes acquisitions completed during 

the second half of 2015.  

TRANSALTA CORPORATION M17 
M17

TransAlta Corporation    |    2017  Annual Integrated Report 
                           
                           
                           
                        
                        
                        
                        
                        
                        
                               
                               
                               
                            
                            
                            
 
 
 
 
 
                                                 
Management’s Discussion and Analysis

Hydro 
Year ended Dec. 31

Contract production (GWh)

Merchant production (GWh)

Total production (GWh)

Gross installed capacity (MW)

Revenues

Fuel and purchased power

Comparable gross margin

Operations, maintenance, and administration

Taxes, other than income taxes

Net other operating income

Comparable EBITDA

Deduct:

   Sustaining capital:

2017

2016

2015

                         1,866 

                         1,768 

                         1,662 

                                82 

                                88 

                                86 

                         1,948 

                         1,856 

                         1,748 

                             926 

                             926 

                             926 

                             121 

                             126 

                             116 

                                   6 

                                   8 

                                   8 

                             115 

                             118 

                             108 

                                37 

                                33 

                                38 

                                   3 

                                   3 

                                   3 

                                    - 

                                    - 

                                 (6)

                                75 

                                82 

                                73 

      Routine capital, excluding hydro life extension

                                   8 

                                   8 

                                   3 

      Hydro life extension

      Planned major maintenance

      Total before flood-recovery capital

      Flood-recovery capital

      Total sustaining capital expenditures

      Productivity capital

      Total sustaining and productivity capital

                                    - 

                                   9 

                                18 

                                   5 

                                10 

                                10 

                                13 

                                27 

                                31 

                                    - 

                                   2 

                                   4 

                                13 

                                29 

                                35 

                                   1 

                                    - 

                                    - 

                                14 

                                29 

                                35 

Hydro cash flow

61

53

38

2017 
Production for 2017 increased by 92 GWh compared to 2016, primarily due to stronger water resources from spring run-
off during the first nine months of 2017 in Alberta. 

However, comparable EBITDA for the year ended Dec. 31, 2017 decreased by $7 million compared to 2016, due to higher 
operations, maintenance, and administration costs and a $3 million positive adjustment relating to a prior year metering 
issue at one of our facilities recorded in 2016. 

Sustaining  capital  before  insurance  recoveries  for  2017,  decreased  $16  million  compared  to  2016  due  to  lower 
expenditures  on  major  overhauls.  Life  extension  projects  at  Bighorn  and  Brazeau  and  flood  recovery  capital  spend 
occurred in 2016. 

2016 
Production for 2016 increased by 108 GWh over 2015, primarily due to better water resources. 

Comparable EBITDA for 2016 increased $9 million compared to 2015. Higher generation contributed to higher revenues. 
Our financial contracts partially offset lower levels of revenues in the Alberta ancillary market, and we also benefited from  
cost-reduction initiatives implemented in late 2015 as well as recognized business interruption recoveries in net other 
operating income (loss). 

Sustaining  capital  (before  insurance  recoveries)  for  2016  decreased  $6  million  compared  to  2015  due  to  lower 
expenditures on hydro life extension projects, partially offset by higher expenditures on routine capital. 

M18
M18  TRANSALTA CORPORATION 

TransAlta Corporation    |    2017  Annual Integrated Report 
                               
                               
                               
 
  
 
 
 
 
Management’s Discussion and Analysis

Energy Marketing
Year ended Dec. 31

Revenues and comparable gross margin

Operations, maintenance, and administration

Market Surveillance Administrator settlement

Comparable EBITDA

Deduct:
    Provisions
    Unrealized (gains) losses on risk management activities
Energy Marketing cash flow

2017

2016

2015

                                69 

                                76 

                                49 

24

-

45

24

-

52

15

56

(22)

                                 (2)                                 24 
                                   8 
                                   3 
39
25

                              (28)
                              (11)
17

2017 
Comparable EBITDA results were lower by $7 million compared to 2016, due to unfavourable first quarter of 2017 results 
impacted  by  warm  winter  weather  in  the  Northeast,  significant  precipitation  in  the  Pacific  Northwest  and  reduced 
margins from our customer business.  

2016 
Comparable EBITDA from Energy Marketing increased $74 million compared to 2015 as a result of solid performances in 
all markets where we are active. During the second quarter of 2015, unexpectedly volatile markets in Alberta and  the 
Pacific Northwest negatively impacted gross margin.  Operating, maintenance, and administration costs increased $12 
million  to  $24  million  in  2016  compared  to  2015,  due  to  increases  in  share-based  incentive  compensation  and  lower 
charges to other business segments for energy hedging and optimization services. In 2015, we recognized $56 million in 
net other operating loss relating to the Alberta MSA settlement. 

2017 
Corporate
Our Corporate overhead costs were $14 million higher for the year ended Dec. 31, 2017, compared to 2016 mostly due 
to higher annual incentive compensations and Project Greenlight initiative fees. See the Strategic Growth and Corporate 
Transformation section of this MD&A for further details. The first quarter of 2017 also includes the reclassification of 
incentives for 2016 between our operational segments and our Corporate segment.  

2016 
Our Corporate overhead costs of $71 million were lower in 2016 compared to 2015 ($78 million) as we realized benefits 
of  cost-efficiency  initiatives  and  reduced  restructuring  costs  that  were  offset  by  reduced  allocations  to  our  business 
segments.  

The methodologies and ratios  used by rating agencies to assess our credit ratings are not  publicly disclosed. We have 
Key Financial Ratios
developed our own definitions of ratios and targets to help evaluate the strength of our financial position. These metrics 
and ratios are not defined under IFRS, and may not be comparable to those used by other entities or by rating agencies. 
We are focused on strengthening our financial position and flexibility and aim to meet all our target ranges by 2018.  

1 

(1) Includes finance lease obligations and tax equity financing. 
(2) Included in risk management assets and/or liabilities on the consolidated financial statements as at Dec. 31, 2017, Dec. 31, 2016, and Dec. 31, 2015.

TRANSALTA CORPORATION M19 
M19

TransAlta Corporation    |    2017  Annual Integrated Report 
                               
                               
                               
                                   
                                   
                               
                               
                               
                             
                               
                               
                               
 
 
 
 
 
                                                 
Management’s Discussion and Analysis

Funds from Operations Before Interest to Adjusted Interest Coverage 

As at Dec. 31

FFO

Add:  Interest on debt and finance leases, net of interest income and 
  capitalized interest

FFO before interest

Interest on debt and finance leases, net of interest income

Add:  50 per cent of dividends paid on preferred shares

Adjusted interest

FFO before interest to adjusted interest coverage (times)

2017

804

205

1,009

214

20

234

4.3

2016

734

203

937

219

21

240

3.9

2015

699

211

910

220

23

243

3.7

Our target for FFO before interest to adjusted interest coverage is four to five times. The ratio improved  significantly 
compared to 2016 due to better FFO delivered by the business and lower interest on debt as we continue to execute on 
our deleveraging plan.  

Adjusted Funds from Operations to Adjusted Net Debt 

As at Dec. 31

FFO

Less:  50 per cent of dividends paid on preferred shares

Adjusted FFO
Period-end long-term debt(1)

Less:  Cash and cash equivalents 

Add:  50 per cent of issued preferred shares
Fair value asset of hedging instruments on debt(2)

Adjusted net debt

Adjusted FFO to adjusted net debt (%)

2017

2016

2015

804

(20)

784

734

(21)

713

699

(23)

676

3,707

4,361

4,495

(314)

471

(30)

3,834

20.4

(305)

471

(163)

4,364

16.3

(54)

471

(190)

4,722

14.3

Our adjusted FFO to adjusted net debt ratio improved to 20.4 per cent, mainly due to the significant reduction in our net 
debt and the improvement in FFO. We reached the low end of our target range of 20 to 25 per cent in 2017 for the first 
time since 2011, due in part to our operations at South Hedland, which was fully commissioned in July 2017, and lower 
debt levels. 

Adjusted Net Debt to Comparable EBITDA 
1 
As at Dec. 31
Period-end long-term debt(1)

Less:  Cash and cash equivalents

Add:  50 per cent of issued preferred shares
Fair value asset of hedging instruments on debt(2)

Adjusted net debt   

Comparable EBITDA

Adjusted net debt to comparable EBITDA (times)

2017

3,707

(314)

471

(30)

3,834

1,062

3.6

2016

4,361

(305)

471

(163)

4,364

1,144

3.8

2015

4,495

(54)

471

(190)

4,722

867

5.4

Our adjusted net debt to comparable EBITDA ratio improved compared to 2016, mainly due to the significant reduction in 
our net debt during the year. Our target for adjusted net debt to comparable EBITDA is 3.0 to 3.5 times. We expect this metric 

(1) Includes finance lease obligations and tax equity financing. 
(2) Included in risk management assets and/or liabilities on the consolidated financial statements as at Dec. 31, 2017, Dec. 31, 2016, and Dec. 31, 2015. 

M20
M20  TRANSALTA CORPORATION 

TransAlta Corporation    |    2017  Annual Integrated Report 
 
                        
                        
                        
                        
                        
                        
                    
                        
                        
                        
                        
                        
                           
                           
                           
                        
                        
                        
                          
                          
                          
 
                        
                        
                        
                          
                          
                          
                        
                        
                        
                    
                    
                    
                       
                       
                          
                        
                        
                        
                          
                       
                       
                    
                    
                    
                       
                       
                       
 
                    
                    
                    
                       
                       
                          
                        
                        
                        
                          
                       
                       
                    
                    
                    
                    
                    
                        
                          
                          
                          
 
                                                 
Management’s Discussion and Analysis

to trend towards our targeted level due to the expected increase in comparable EBITDA from operations at South Hedland, 
which was fully commissioned in July 2017.  

Ability to Deliver Financial Results1
The metrics we use to track our performance are comparable EBITDA, FFO, and FCF. The following table compares target to 
actual amounts for each of the three past fiscal years: 

Year ended Dec. 31

Comparable EBITDA

FFO

FCF

Target
Actual(2)

Target

Actual

Target

Actual

2017(1)

2016

2015

1,025 - 1,135

990 - 1,100

1,000 - 1,040

1,062

765 - 855

804

300 - 365

328

1,144

755 - 835

734

250 - 300

257

867

720 - 770

699

265 - 270

239

Normal Course Issuer Bid 
Significant and Subsequent Events 
On March 1, 2018, the Corporation announced that it intends to seek Toronto Stock Exchange ("TSX") acceptance of a 
NCIB. The Board has authorized the repurchases of up to 14,000,000 of its common shares, representing approximately 
five  per  cent  of  TransAlta's  public  float.  Purchases  under  the  NCIB  are  expected  to  be  made  through  open  market 
transactions  on  the  TSX  and  any  alternative  Canadian  trading  platforms,  based  on  the  prevailing  market  price.  Any 
Common Shares purchased under the NCIB will be cancelled.  

Acquisition of Two US Wind Projects 
On Feb. 20, 2018, TransAlta Renewables announced it had entered into an arrangement to acquire two construction-
ready projects in the Northeast United States.  

The wind development projects consist of: (i) a 90 MW project located in Pennsylvania that has a 15-year PPA and (ii) a 
29 MW project located in New Hampshire with two 20-year PPAs.  All three counterparties have Standard & Poor’s credit 
ratings of A+ or better. 

The total cost of the two projects is estimated to be US$240 million, of which approximately 70 per cent will be funded in 
2018 and the remainder in 2019.  The commercial operation date for both projects is expected during the second half of 
2019. 

TransAlta Renewables will fund the acquisition and construction costs using its existing liquidity and tax equity. 

Investment Highlights: 

▪ 
▪ 

▪ 
▪ 
▪ 

accretive to cash available for distribution per share; 
aligns  with  the  Corporation’s  and  TransAlta  Renewables’  strategy  of  acquiring  contracted  renewable  power 
generation assets that provide stable cash flow through long-term PPAs with creditworthy counterparties; 
delivers growth that creates long-term shareholder value; 
provides additional geographic and asset diversification; and 
the  acquisition  of  the  projects  is  subject  to  a  number  of  closing  conditions,  including  customary  regulatory 
approvals and, in the case of the New Hampshire project, the receipt of a favourable regulatory determination 
in relation to the permitting of the project. 

(1)  Represents our original outlook. In the second quarter we reduced the following 2017 targets: Comparable EBITDA from the previously announced target range of 
$1,025 million to $1,135 million to $1,025 to $1,100 million, FFO from the previously announced target range of $765 million  to $855 million to $765 million to 
$820 million FCF target range to $270 million to $310 million from the previously announced target range of $300 million to $365 million. 

(2)  Comparable EBITDA in 2015 and 2016 was impacted by non-cash adjustments related to the Keephills 1 provision. Excluding these adjustments, our Comparable 

EBITDA would have been $1,064 million in 2016 and $926 million in 2015. 

TRANSALTA CORPORATION M21 
M21

TransAlta Corporation    |    2017  Annual Integrated Report 
                                  
                                  
                                       
                                       
                                       
                                       
                                       
                                       
                                       
 
 
 
 
 
 
 
                                                 
Management’s Discussion and Analysis

Early Redemption of Senior Notes Due 2018 
On Feb. 2, 2018, the Corporation announced it called for the redemption of its outstanding US$500 million 6.65 per cent 
senior notes maturing May 15, 2018 (the “Senior Notes”). The Senior Notes will be redeemed on March 15, 2018, at a 
price equal to the greater of: (i) 100 per cent of the principal amount of the Senior Notes and (ii) the sum of the present 
values of the remaining scheduled payments of principal and interest thereon discounted to the redemption date on a 
semi-annual basis at the treasury rate  plus 45 basis points,  plus in each case,  accrued  interest thereon to the date of 
redemption. 

Balancing Pool Provides Notice to Terminate the Alberta Sundance Power Purchase Arrangements 
On Sept 18. 2017, the Corporation received formal notice from the Balancing Pool for the termination of the Sundance B 
and C Power Purchase Arrangements (“Sundance PPAs”) effective March 31, 2018. 

The termination of the Sundance PPAs by the Balancing Pool was expected and the Corporation is working to ensure it 
receives the termination payment that it believes it is entitled to under the Sundance PPAs and applicable legislation. The 
expected impacts of the termination include approximately $215 million in compensation for the net book value of the 
assets as compared to the Balancing Pool’s estimate of approximately $157 million. The Balancing Pool’s estimate differs 
because  it  excludes  certain  mining  assets  that  the  Corporation  believes  should  be  included  in  the  net  book  value 
calculation. 

Transition to Clean Power in Alberta and Sundance Unit 1 Impairment Charge 
I. Sundance and Keephills Units 1 and 2 Coal-to-Gas Conversion Strategy 
On Dec. 6, 2017, the Corporation updated its strategy to accelerate its transition to gas and renewables generation. The 
strategy includes mothballing and retiring the following Sundance Units: 

▪ 
▪ 
▪ 
▪ 
▪ 

retiring Sundance Unit 1 effective Jan. 1, 2018; 
temporarily mothballing Sundance Unit 2 effective Jan. 1, 2018, for a period of up to two years;  
temporarily mothballing Sundance Unit 3 effective April 1, 2018, for a period of up to two years; 
temporarily mothballing Sundance Unit 4 effective April 1, 2019, for a period of up to two years; and 
temporarily mothballing Sundance Unit 5 effective April 1, 2018, for a period of up to one year. 

As a result of the clarity provided by the draft coal-to-gas conversion rules proposed by the Government of Canada, the 
Corporation has determined to accelerate the conversion of Sundance Units 3 to 6 and Keephills Units 1 and 2 from coal-
fired generation to gas-fired generation in the 2021 to 2022 timeframe, a year earlier than originally planned. Although 
not yet finalized, the Government of Canada has proposed coal-to-gas conversion rules that would extend the life of the 
Corporation's gas conversion units by five to ten years past their federal end of coal life, depending on their CO2 emissions 
profile.  The  proposed  rules  would  see  the  life  of  TransAlta’s  entire  coal-fired  fleet  extended  by  an  aggregate  of 
approximately 75 years. In addition to extending their operating lives, the benefits of converting units to gas generation 
include:  significantly  lowering  carbon  intensities,  emissions  and  costs;  significantly  lowering  operating  and  sustaining 
capital costs; and increasing operating flexibility. 

Temporarily mothballing the combination of Sundance Units throughout 2018 and 2019 ensures that two Sundance Units 
can operate at high-capacity utilizations with lower costs throughout the period to 2020 when additional power will be 
needed  in  the  Alberta  market.  The  mothballing  of  the  units  will  also  assist  the  Corporation  in  its  preparations  for 
converting Sundance Units 3 to 6 and Keephills Units 1 and 2 from coal-fired generation to gas-fired generation in the 
2021 to 2022 timeframe, thereby extending the useful lives of these assets until the mid-2030s. 

II. Gas Supply for Coal-to-Gas Conversions 
On  Dec.  6,  2017,  the  Corporation  entered  into  a  letter  of  intent  with  Tidewater  Midstream  and  Infrastructure  Ltd. 
("Tidewater")  to  construct  a  120-kilometre  natural  gas  pipeline  from  Tidewater's  Brazeau  River  complex  to  the 
Corporation's generating units at Sundance and Keephills facilities. The pipeline is expected to provide initial capacity of 
130 million cubic feet of gas per day by 2020, and to have expansion capability to 340 million cubic feet of gas per day. The 
initial capacity will support fuel blending, using a fuel combination of coal and gas for generation, which will reduce the 
marginal cost as well as emissions. The Corporation will have the option to acquire up to a 50 per cent interest in the 
pipeline, which, if exercised, would reduce the costs associated with the tolling agreement. 

M22
M22  TRANSALTA CORPORATION 

TransAlta Corporation    |    2017  Annual Integrated Report 
 
 
 
 
 
 
Management’s Discussion and Analysis

The  decision  to  work  with  Tidewater  advances  the  timeframe  for  the  construction  of  the  pipeline  and  permits  the 
acceleration of plant conversions.  TransAlta remains of the view that having at least two pipelines supplying natural gas 
would reduce operational risks and continues to advance discussions with other parties to construct additional pipelines 
to meet the remaining gas supply requirements for the facilities.  

III. Sundance Units 1 and 2  
Federal regulations stipulate that all coal plants built before 1975 must cease to operate on coal by the end of 2019, which 
includes Sundance Units 1 and 2. Given that Sundance Unit 1 will be shut down two years early, the federal Minister of 
Environment has agreed to extend the life of Sundance Unit 2 from 2019 to 2021. This will provide the Corporation with 
flexibility to respond to the regulatory environment for coal-to-gas conversions and the new upcoming Alberta capacity 
market. 

Sundance Units 1 and 2 collectively account for 560 MW of the 2,141 MW capacity at the Sundance power plant, which 
serves as a baseload provider for the Alberta electricity system. The PPA with the Balancing Pool relating to Sundance  
Units 1 and 2 expired on Dec. 31, 2017.  

In the second quarter of 2017, we recognized an impairment charge on Sundance Unit 1 in the amount of $20 million due 
to our decision to early retire Sundance Unit 1.  

Notice of Termination of South Hedland PPA from Fortescue Metals Group Limited 
On Nov. 13, 2017, the Corporation announced that TEC Hedland Pty Ltd ("TEC Hedland"), a subsidairy of the Corporation, 
received formal notice of termination of the South Hedland PPA from a subsidiary of FMG. The South Hedland PPA allows 
FMG  to  terminate  the  agreement  if  the  power  station  has  not  reached  commercial  operation  within  a  specified  time 
period. FMG continues to be of the view that South Hedland Power Station has yet to achieve commercial operation.  

The  Corporation  believes  that  all  conditions  required  to  establish  commercial  operations,  including  all  performance 
conditions,  have  been  achieved  under  the  terms  of  the  South  Hedland  PPA.  These  conditions  include  receiving  a 
commercial operation certificate, successfully completing and passing certain test requirements, and obtaining all permits 
and approvals required from the North West Interconnected System and government agencies. 

Confirmation of commercial operation has been provided by independent engineering firms, as well as by Horizon Power, 
the state-owned utility. The Corporation will take all steps necessary to protect its interests in the facility and ensure all 
cash flows promised under the South Hedland PPA are realized. 

TEC Hedland commenced proceedings in the Supreme Court of Western Australia on Dec. 4, 2017, to recover amounts 
invoiced under the South Hedland PPA. 

The South Hedland Power Station has been fully operational and able to meet FMG’s requirements under the terms of 
the South Hedland PPA since July 2017. 

Re-acquisition of Solomon Power Station 
On Aug. 1, 2017, the Corporation received notice of FMG’s intention to repurchase the Solomon Power Station from TEC 
Pipe  Pty  Ltd.  ("TEC  Pipe"),  a  wholly  owned  subsidiary  of  the  Corporation,  for  approximately  US$335  million.  FMG 
completed  its  acquisition  of  the  Solomon  Power  Station  on  Nov.  1,  2017  and  TEC  Pipe  received  US$325  million  as 
consideration. FMG has held back the balance from the purchase price. It is the Corporation’s view that this should not 
have been held back and the Corporation is taking action to recover all, or a significant portion of, this amount from FMG. 

M23
TRANSALTA CORPORATION M23 

TransAlta Corporation    |    2017  Annual Integrated Report 
 
 
 
 
 
 
 
 
 
Management’s Discussion and Analysis

TransAlta Renewables’ $260-Million Project Financing of New Brunswick Wind Assets and Early Redemption of 
Outstanding Debentures 
On  Oct.  2,  2017,  TransAlta  Renewables  announced  that  its  indirect  majority-owned  subsidiary,  Kent  Hills  Wind  LP 
(“KHWLP”), closed an approximate $260 million bond offering, secured by, among other things, a first ranking charge over 
all assets of KHWLP. The bonds are amortizing and bear interest at a rate of 4.454 per cent, payable quarterly, and mature 
on Nov. 30, 2033. A portion of the net proceeds will be used to fund a portion of the construction costs for the 17.25 MW 
Kent Hills 3 wind project (upon meeting certain completion tests and other specified conditions). The remaining proceeds 
were  advanced  to  its  subsidiary  Canadian  Hydro  Developers  Inc.  (“CHD”)  and  to  Natural  Forces  Technologies  Inc., 
KHWLP’s partner, which owns approximately 17 per cent of KHWLP. Proceeds of $30 million were classified as restricted 
cash as at Dec. 31, 2017 and will be released from the construction reserve account upon commissioning. 

At  the  same  time,  CHD,  a  wholly  owned  subsidiary  of  TransAlta  Renewables,  provided  notice  that  it  would  be  early 
redeeming all of its unsecured debentures. The debentures were scheduled to mature in June 2018. On Oct. 12, 2017, 
CHD redeemed the unsecured debentures for $201 million in total, which included the principal of $191 million, an early 
redemption  premium of $6 million,  and  accrued interest of $4 million.  The $6 million early  redemption  premium  was 
recognized in net interest expense for the year ended Dec. 31, 2017. 

Wintering Hills Sale  
On Jan. 26, 2017, we announced the sale of our 51 per cent interest in the Wintering Hills merchant wind facility for 
approximately  $61  million.  The  sale  closed  March  1,  2017.  Proceeds  from  the  sale  were  used  for  general  corporate 
purposes, including reducing our debt and funding future renewables growth. We acquired the interest in Wintering Hills 
in 2015 in connection with the restructuring of the arrangements associated with our Poplar Creek cogeneration facility. 
As at Dec. 31, 2016, the assets were classified as held for sale, and were measured at the lower of carrying amount and 
fair value less costs to sell, resulting in an impairment charge of $28 million, included in the Wind and Solar segment for 
the year ended Dec. 31, 2016. 

Alberta Off-Coal Agreement 
On Nov. 24, 2016, we announced that we entered into the OCA with the Government of Alberta on transition payments 
in exchange for the cessation of coal-fired emissions from the Keephills 3, Genesee 3 and Sheerness coal-fired plants on 
or before Dec. 31, 2030.  

Under the terms of the OCA, we will receive annual cash payments of approximately $37.4 million, net to the Corporation, 
commencing in 2017 and terminating in 2030, for a total amount of approximately $524 million. Receipt of the payments 
is subject to terms and conditions. The OCA’s main condition is the cessation of all coal-fired emissions in 2030. Other 
conditions  include  maintaining  prescribed  spending  on  investment  and  investment-related  activities  in  Alberta, 
maintaining  a  significant  business  presence 
in  Alberta  (including  through  the  maintenance  of  prescribed 
employment levels), maintaining spending on programs and initiatives to support the communities surrounding the plants, 
and the employees of the Corporation negatively impacted by the phase-out of coal generation and fulfilling all obligations 
to affected employees. The affected plants are not, however, precluded from generating electricity at any time by any 
method, other than the combustion of coal. 

Force Majeure Relief - Keephills 1 
Keephills 1 tripped off-line on March 5, 2013, due to a suspected winding failure within the generator. After extensive 
testing  and  analysis,  it  was  determined  that  a  full  rewind  of  the  generator  stator  was  required.  After  completing  the 
repairs,  the unit returned to service on Oct. 6,  2013. We claimed force majeure relief on March 26,  2013.  The buyer, 
ENMAX, disputed the claim of force majeure, which triggered the need for an arbitration hearing that took place in May 
2016. On Nov. 18, 2016, we announced that the independent arbitration panel confirmed our claim for force majeure 
relief. Accordingly, we reversed a provision of approximately $94 million. The buyer and the Balancing Pool are seeking to 
appeal or set the arbitration panel’s decision aside in the Court of Queen’s Bench of Alberta. We oppose these steps and 
believe they are without merit. 

M24
M24  TRANSALTA CORPORATION 

TransAlta Corporation    |    2017  Annual Integrated Report 
 
 
 
 
 
 
Management’s Discussion and Analysis

Memorandum of Understanding with the Government
In  November  2016,  we  entered  into  a  Memorandum  of  Understanding  (“MOU”)  with  the  Government  of  Alberta  to 
collaborate and co-operate in the development of a policy framework to facilitate the conversion of coal-fired generation 
to gas-fired generation, facilitate existing and new renewable electricity development through supportive and enabling 
policy, and ensure existing generation and new electricity generation are able to effectively  participate in the recently 
announced capacity market to be developed for the province of Alberta. Specifically, the parties undertook to collaborate 
on, among other things: 
▪ 

ensuring existing incumbents and new electricity generation are able to effectively participate in capacity payment 
auctions to be established as part of the development of a capacity market, 
developing  a  policy  environment  to  facilitate  the  economic  and  environmentally  responsible  conversion  of  some 
coal-fired generation to natural gas-fired generation in Alberta, including securing regulatory co-operation from the 
federal government, and 
developing  supportive  and  enabling  policy,  including  policy  that  addresses  the  value  of  carbon  reductions  in  the 
generation  of  electricity  from  existing  wind  and  hydro  generation,  the  development  of  effective  supporting 
mechanisms to ensure that existing renewables generation is not adversely impacted by the implementation of a 
capacity market in Alberta, and the development of regulatory clarity and alignment so as to permit the economic 
and timely development of hydroelectric projects within Alberta. 

▪ 

▪ 

The MOU does not create any legally binding obligations between the Government of Alberta and the Corporation and 
does not impose any obligations on, or constrain the discretion and authority of, the Government of Alberta. 

Mississauga Cogeneration Facility New Contract 
On Dec. 22, 2016, we announced that we had signed the NUG Contract with the IESO for our Mississauga cogeneration 
facility  (the  “Mississauga  Facility”).  The  NUG  Contract  became  effective  on  Jan.  1,  2017,  and  in  conjunction  with  the 
execution of the NUG Contract, we agreed to terminate, effective Dec. 31, 2016, the Mississauga Facility’s pre-existing 
contract with the OEFC, which would have otherwise terminated in December 2018. 

The  NUG  Contract  provides  us  stable  monthly  payments  until  Dec.  31,  2018,  totalling  approximately  $209  million, 
reduced operational costs, and the ability to maintain operational flexibility to pursue opportunities for the Mississauga 
Facility to meet power market needs in northeastern Ontario.  

As  a  result  of  the  NUG  Contract,  we  recognized  a  pre-tax  gain  of  approximately  $191  million.  The  predominant 
components of the gain relate to recognition of a one-time discounted revenue amount of approximately $207 million, 
offset by onerous contract expenses and other termination charges totalling $15 million. We also recognized $46 million 
in accelerated depreciation resulting from the change in useful life of the asset. We released and recognized in earnings 
unrealized pre-tax losses of net $14 million from accumulated other comprehensive income (“AOCI”) due to cash flow 
hedges  de-designated  for  accounting  purposes.  The  cash  flow  hedges  were  in  respect  of  future  gas  purchases 
denominated in US dollars expected to occur between 2017 and 2018. In the fourth quarter of 2016, the forecasted gas 
consumption was no longer expected to occur, which resulted in the cumulative loss on the hedging instruments being 
released from AOCI and recognized in earnings. 

Investment and Acquisition by TransAlta Renewables of the Sarnia Cogeneration Plant, Le Nordais Wind Farm and 
Ragged Chute Hydro Facility 
On Jan. 6, 2016, TransAlta Renewables completed its investment in an economic interest based on the cash flows of the 
Corporation’s “Canadian Assets” for a combined aggregate value of approximately $540 million. The Canadian Assets 
consist  of  approximately  611  MW  of  highly  contracted  power  generation  assets  located  in  Ontario  and  Québec.  The 
transaction was originally announced on Nov. 23, 2015.  

As consideration, TransAlta Renewables provided to the Corporation $173 million in cash, issued 15,640,583 common 
shares with an aggregate value of $152 million and issued a $215 million convertible unsecured subordinated debenture. 
On Nov. 9, 2017, TransAlta Renewables repaid the debentures early, for $218 million in total, comprised of the principal 
of $215 million and accrued interest of $3 million. The convertible debenture was scheduled to mature on Dec. 31, 2020. 

M25
TRANSALTA CORPORATION M25 

TransAlta Corporation    |    2017  Annual Integrated Report 
 
 
 
 
 
 
Management’s Discussion and Analysis

TransAlta Renewables funded the cash proceeds through the public issuance of 17,692,750 subscription receipts at a 
price of $9.75 per subscription receipt. Upon the closing of the transaction, each holder of subscription receipts received, 
for no additional consideration, one common share of TransAlta Renewables and a cash dividend equivalent payment of 
$0.07 for each subscription receipt held. As a result, TransAlta Renewables issued 17,692,750 common shares and paid a 
total dividend equivalent of $1 million. Share issuance costs amounted to $8 million, net of $2 million income tax recovery. 
On Jan. 6, 2016, TransAlta Renewables declared a dividend increase of 5 per cent. 

On Nov. 30, 2016, TransAlta Renewables acquired direct ownership of the Canadian Assets from the Corporation for a 
purchase price of $520 million by issuing a promissory note.  At the same time, the Corporation’s subsidiary redeemed 
the preferred shares that it had issued to TransAlta Renewables in January 2016 when TransAlta Renewables acquired 
an economic interest in the Canadian Assets as described above for $520 million. The two transactions were subject to a 
set-off arrangement and resulted in no cash payments. TransAlta Renewables also acquired working capital and certain 
capital spares totalling $19 million through the issuance of a non-interest bearing loan payable to the Corporation. 

Alberta Market Surveillance Administrator Ruling 
On July 27, 2015, the Alberta Utilities Commission (“AUC”) issued a ruling that found, among other things, that our actions 
in  relation to four outage events at our coal-fired  generating  units,  spanning 11 days in  2010 and  2011,  restricted  or 
prevented  a  competitive  response  from  the  associated  PPA  buyers  and  manipulated  market  prices  away  from  a 
competitive market outcome.  

On Sept. 30, 2015, TransAlta and the Alberta MSA reached an agreement to settle all outstanding proceedings before the 
AUC. The settlement, which was in the form of a consent order, was approved by the AUC on Oct. 29, 2015. Under the 
terms of the agreement, we agreed to pay a total amount of $56 million that included approximately $27 million as a 
repayment of economic benefits, approximately $4 million to cover the MSA’s legal and related costs, and a $25 million 
administrative penalty. Of this amount, $31 million was paid in the fourth quarter of 2015, and $25 million was paid in the 
fourth quarter of 2016.  

M26
M26  TRANSALTA CORPORATION 

TransAlta Corporation    |    2017  Annual Integrated Report 
 
 
 
 
Management’s Discussion and Analysis

The  following  chart  highlights  significant  changes  in  the  Consolidated  Statements  of  Financial  Position  from  Dec.  31, 
2017, to Dec. 31, 2016: 
Financial Position 

Increase/
(decrease)

Primary factors explaining change

Assets   
Trade and other receivables

Assets held for sale

Restricted cash

Finance lease receivables (long term)

Property, plant, and equipment, net 

230

Timing of customer receipts and seasonality of revenue

(61)

Closing of the sale of the Wintering Hills wind facility

30

Restricted cash related to the KHWLP project financing 

(504)

(246)

Termination of Solomon finance lease ($424 million), 
unfavourable changes in foreign exchange rates 
($23 million) and scheduled receipts ($58 million)

Depreciation for the year ($635 million), unfavourable 
changes in foreign exchange rates ($43 million), retirement 
and disposals of assets ($36 million), and impairment charge 
($20 million), partially offset by additions ($338 million) and 
revisions to decommissioning and restoration costs ($151 
million)

Deferred income tax assets 

(29)

Decreases in deductible temporary differences

Risk management assets (current and long term)

(131)

Contract settlements and unfavourable changes in foreign 
exchange rates, partially offset by market price movements

Other assets

Other

Total decrease in assets

Liabilities and equity
Accounts payable and accrued liabilities

(5)

Contractual payments received under Mississauga NUG 
contract ($116 million), offset by South Hedland long-term 
prepaid ($75 million) and loan receivable ($33 million)

24

(692)

Increase/
(decrease)
182

Primary factors explaining change
Timing of payments and accruals

Dividends payable 

(20)

Timing of the declaration of common dividends

Credit facilities, long term debt, and finance lease 
  obligations (including current portion)

Income taxes payable

Decommissioning and other provisions (current 
  and long term)

Defined benefit obligation and other 
  long term liabilities

Deferred income tax liabilities

(654)

58

127

Repayments ($708 million) net of gain on cross currency 
swap and favourable effects of changes in foreign exchange 
rates ($214 million), partially offset by increase in the 
KHWLP project financing ($260 million) and increase credit 
facility ($26 million)

Disposition of Solomon Power Station

Impact of lower discount rate due to shortened useful lives 
on certain Alberta coal assets

29

Actuarial losses of $36 million partially offset by higher 
benefits contributions

(163)

Disposition of Solomon Power Station and decreases in 
taxable temporary differences

Risk management liabilities (current and 
  long term)

27

Unfavourable market price changes, unfavourable foreign 
exchange and settled contracts

Equity attributable to shareholders

(185)

Non-controlling interests

Other 

Total decrease in liabilities and equity

(93)

-

(692)

Net loss ($160 million), common share dividends ($34 
million), preferred share dividends ($30 million), reallocation 
of equity in TransAlta Renewables ($48 million), partially 
offset by net other comprehensive income ($86 million)

Distributions paid and payable ($172 million) and 
intercompany available-for-sale-investments ($11 million), 
partially offset by reallocation of equity in TransAlta 
Renewables ($48 million) and net earnings ($42 million)

M27
TRANSALTA CORPORATION M27 

TransAlta Corporation    |    2017  Annual Integrated Report                     
                      
                        
                   
                   
                      
                   
                         
                        
                   
                     
                      
                   
                        
                     
                        
                   
                        
                   
                      
                            
                   
Management’s Discussion and Analysis

The following chart highlights significant changes in the Consolidated Statements of Cash Flows for the year ended Dec. 
31, 2017, compared to the years ended Dec. 31, 2016 and Dec. 31, 2015: 
Cash Flows

Year ended Dec. 31
Cash and cash equivalents, 
  beginning of year
Provided by (used in):
  Operating activities

2017
305

Increase/
(decrease)
251

2016
54

Primary factors explaining change

626

744

(118)

Unfavourable change in non-cash working capital of 
($187 million), partially offset by higher cash earnings 
($69 million)

  Investing activities

                  87 

            (327)

414

  Financing activities

(703)

(163)

(540)

Proceeds on sale of Wintering Hills wind facility and Solomon 
power station disposition ($478 million), net loan receivable 
($38 million), and restricted cash ($30 million)

Higher repayment of long-term debt ($726 million), lower 
issuance of long-term debt ($101 million), and lower proceeds on 
sale of non-controlling interest in subsidiary ($162 million), 
partially offset by lower borrowings under credit facility ($341 
million), higher realized gains on financial instrument ($108 
million), and lower dividends paid on common shares ($23 
million)

Translation of foreign 
  currency cash
Cash and cash equivalents,
   end of year

Year ended Dec. 31
Cash and cash equivalents, 
  beginning of year
Provided by (used in):
  Operating activities

(1)

(3)

314

305

2

9

2016
54

Increase/
(decrease)
11

2015
43

Primary factors explaining change

744

432

312

Favourable change in non-cash working capital of $315 million

  Investing activities

(327)

(573)

246

  Financing activities

(163)

149

(312)

Lower additions to property, plant, and equipment 
($118 million), a higher decrease in finance lease receivables 
($33 million), and a decrease in our renewable asset acquisitions 
($101 million)

Increase in repayments of borrowings under credit facilities 
($533 million), lower issuance of long-term debt ($126 million), 
lower proceeds on the sale of non-controlling interest in a 
subsidiary ($242 million), higher distributions paid to 
subsidiaries' non-controlling interests ($52 million), and lower 
realized gains on financial instruments ($89 million), partially 
offset by lower dividends paid to common shareholders ($55 
million) and lower repayment of long-term debt ($670 million)

Translation of foreign 
  currency cash
Cash and cash equivalents, end of 
year

(3)

305

3

54

(6)

251

M28
M28  TRANSALTA CORPORATION 

TransAlta Corporation    |    2017  Annual Integrated Report 
 
               
                
                  
              
             
                
                  
            
            
                
                  
                  
                        
              
             
                        
 
 
                 
                
                     
              
             
                  
            
            
                  
            
             
                
                  
                   
                      
              
                
                  
Management’s Discussion and Analysis

Financial instruments are used for proprietary trading purposes and to manage our exposure to interest rates, commodity 
Financial Instruments
prices, and currency fluctuations, as well as other market risks. We currently use physical and financial swaps, forward 
sale and purchase contracts, futures contracts, foreign exchange contracts, interest rate swaps, and options to achieve 
our risk management objectives. Some of our physical commodity contracts have been entered into and are held for the 
purposes of meeting our expected  purchase,  sale, or usage  requirements  (“own use”)  and as such,  are not  considered 
financial instruments and are not recognized as a financial asset or financial liability. Other physical commodity contracts 
that are not held for normal purchase or sale requirements and derivative  financial instruments are recognized on the 
Consolidated Statements of Financial Position and are accounted for using the fair value method of accounting. The initial 
recognition of fair value and subsequent changes in fair value can affect reported earnings in the period the change occurs 
if hedge accounting is not elected. Otherwise, changes in fair value will generally not affect earnings until the financial 
instrument is settled.  

Some  of  our  financial  instruments  and  physical  commodity  contracts  qualify  for,  and  are  recorded  under,  hedge 
accounting rules. The accounting for those contracts for which we have elected to apply hedge accounting depends on the 
type of hedge. Our financial instruments are categorized as fair value hedges, cash flow hedges, net investment hedges, 
or non-hedges. These categories and their associated accounting treatments are explained in further detail below. 

For all types of hedges, we test for effectiveness at the end of each reporting period to determine if the instruments are 
performing as intended and hedge accounting can still be applied. The financial instruments we enter into are designed to 
ensure that future cash inflows and outflows are predictable. In a hedging relationship, the effective portion of the change in 
the  fair  value  of  the  hedging  derivative  does  not  impact  net  earnings,  while  any  ineffective  portion  is  recognized  in  net 
earnings. 

We have certain contracts in our portfolio that, at their inception, do not qualify for, or we have chosen not to elect to 
apply, hedge accounting. For these contracts, we recognize in net earnings mark-to-market gains and losses resulting from 
changes in forward prices compared to the price at which these contracts were transacted. These changes in price alter 
the timing of earnings recognition, but do not necessarily determine the final settlement amount received. The fair value 
of future contracts will continue to fluctuate as market prices change.  

The fair value of derivatives traded by the Corporation that are not traded on an active exchange, or extend beyond the 
time period for which exchange-based quotes are available, are determined using valuation techniques or models. 

Fair  value  hedges  are  used  to  offset  the  impact  of  changes  in  the  fair  value  of  fixed  rate  long-term  debt  caused  by 
Fair Value Hedges  
variations in market interest rates. We use interest rate swaps in our fair value hedges. During the first quarter of 2017, 
we discontinued hedge accounting for a foreign currency fair value hedge that was in place on US$50 million of debt.  

In  a  fair  value  hedge,  changes  in  the  fair  value  of  the  hedging  instrument  (an  interest  rate  swap,  for  example)  are 
recognized in risk management assets or liabilities, and the related gains or losses are recognized in net earnings. The 
carrying amount of long-term debt subject to the hedge is adjusted for losses or gains associated with the hedged risk, 
with the corresponding amounts recognized in net earnings. As a result, only the net ineffectiveness is recognized in net 
earnings. 

When we do not elect hedge accounting, when we discontinue hedge accounting, or when the hedge is no longer effective 
and does not qualify for hedge accounting, the gains or losses as a result of changes in foreign exchange rates related to 
these financial instruments are recorded in net earnings in the period in which they arise. 

Cash flow hedges are categorized as project, foreign exchange, interest rate, or commodity hedges and are used to offset 
Cash Flow Hedges 
foreign exchange, interest rate, and commodity price exposures resulting from market fluctuations.  

M29
TRANSALTA CORPORATION M29 

TransAlta Corporation    |    2017  Annual Integrated Report 
 
 
 
 
 
 
 
 
 
 
Management’s Discussion and Analysis

Foreign currency forward contracts are used to hedge foreign exchange exposures resulting from anticipated contracts 
and  firm  commitments  denominated  in  foreign  currencies,  primarily  related  to  capital  expenditures,  and  currency 
exposures  related  to  US-denominated  debt.  During  the  first  quarter  of  2017,  we  discontinued  hedge  accounting  for 
certain foreign currency cash flow hedges that were in place on US$690 million of debt. 

Physical and financial swaps, forward sale and purchase contracts, futures contracts, and options are used primarily to 
offset the variability in future cash flows caused by fluctuations in electricity and natural gas prices. Foreign exchange 
forward contracts and cross-currency swaps are used to offset the exposures resulting from foreign-denominated long-
term debt. Interest rate swaps are used to convert the fixed interest cash flows related to interest expense at debt to 
floating rates and vice versa. 

In a cash flow hedge, changes in the fair value of the hedging instrument (a forward contract or financial swap, for example) 
are recognized in risk management assets or liabilities, and the related gains or losses are recognized in OCI. These gains 
or losses are subsequently reclassified from OCI to net earnings in the same period as the hedged forecast cash flows 
impact net earnings, and offset the losses or gains arising from the forecast transactions. For project hedges, the gains and 
losses reclassified from OCI are included in the carrying amount of the related property, plant, and equipment (“PP&E”). 

When we do not elect hedge accounting, when we discontinue hedge accounting, or when the hedge is no longer effective 
and does not qualify for hedge accounting, the gains or losses as a result of changes in prices, interest, or exchange rates 
related to these financial instruments are recorded in net earnings in the period in which they arise. 

Foreign  currency  forward  contracts  and  foreign-denominated  long-term  debt  have  historically  been  used  to  hedge 
Net Investment Hedges  
exposure to changes in the carrying values of our net investments in foreign operations that have a functional currency 
other than the Canadian dollar. In late 2016, we modified our net investment hedging practices and are no longer using 
foreign  currency  forward  contracts  in  our  hedges.  Our  net  investment  hedges  using  US-denominated  debt  remain 
effective and in place. Gains or losses on these instruments are recognized and deferred in OCI and reclassified to net 
earnings  on  the  disposal  of  the  foreign  operation.  We  also  manage  foreign  exchange  risk  by  matching  foreign-
denominated expenses with revenues, such as offsetting revenues from our US operations with interest payments on our 
US dollar debt. 

Financial instruments not designated as hedges are used for proprietary trading and to reduce commodity price, foreign 
Non-Hedges 
exchange,  and  interest  rate  risks.  Changes  in  the  fair  value  of  financial  instruments  not  designated  as  hedges  are 
recognized in risk management assets or liabilities, and the related gains or losses are recognized in net earnings in the 
period in which the change occurs. 

The majority of fair values for our project, foreign exchange, interest rate, commodity hedges, and non-hedge derivatives 
Fair Values 
are calculated using adjusted quoted prices from an active market or inputs validated by broker quotes. We may enter 
into commodity transactions involving non-standard features for which market-observable data is not available. These 
transactions  are  defined  under  IFRS  as  Level  III  instruments.  Level  III  instruments  incorporate  inputs  that  are  not 
observable from the market, and fair value is therefore determined using valuation techniques. Fair values are validated 
by using reasonably possible alternative assumptions as inputs to valuation techniques, and any material differences are 
disclosed in the notes to the financial statements. At Dec. 31, 2017, Level III instruments had a net asset carrying value of 
$767  million  (2016  -  $758  million).  Refer  to  the  Critical  Accounting  Policies  and  Estimates  section  of  this  MD&A  for 
further details regarding valuation techniques. Our risk management profile and practices have not changed materially 
from Dec. 31, 2016, with the exception of the changes to our hedge strategies for our US-dollar-denominated debt, as 
discussed above and in the Governance and Risk Management section of this MD&A. 

M30
M30  TRANSALTA CORPORATION 

TransAlta Corporation    |    2017  Annual Integrated Report 
 
 
 
 
 
 
 
 
Management’s Discussion and Analysis

As a result of the Balancing Pool terminating the Sundance B and C PPAs, our capacity contracted by PPAs and longer-
2018 Financial Outlook 
term contracts next year will drop by approximately 68 per cent. The average price of our short-term physical and financial 
contracts for 2018 is approximately $49 per megawatt hour (“MWh”) in Alberta and approximately US$50 per MWh in 
the Pacific Northwest. 

The following table outlines our expectations of key financial targets for 2018: 

Measure

Target

Comparable EBITDA

$950 million to $1,050 million

FFO

FCF

$725 million to $800 million

$275 million to $350 million 

Canadian Coal Capacity Factor

65 to 75 per cent

Dividend

 $0.16 per common share annualized, 13 to 17 per cent payout of FCF 

Availability and Capacity 
Operations 
Total availability of our Canadian coal fleet is expected to be in the range of 87 to 89 per cent in 2018. Availability of our 
other generating assets (gas, renewables) is expected to be in the range of 95 per cent in 2018. We will be accelerating 
our transition to gas and renewables generation, and have retired Sundance Unit 1 effective Jan. 1, 2018, and expect to 
be  temporarily  mothballing  various  Sundance  Units  during  the  first  four  months  of  2018.  See  the  Significant  and 
Subsequent Events section of this MD&A for further details. 

Fuel Costs  
In Alberta, we expect fuel costs to approximate $37/tonne in 2018, but total fuel costs to be lower due to the mothballing 
of certain Sundance units. See the Significant and Subsequent Events section of this MD&A for further details. 

In the Pacific Northwest, our US Coal mine, adjacent to our power plant, is in the reclamation stage. Fuel at US Coal has 
been purchased primarily from external suppliers in the Powder River Basin and delivered by rail.  The delivered fuel cost 
is expected to remain similar to that in 2017. 

Most of our generation from gas is sold under contract with pass-through provisions for fuel. For gas generation with no 
pass-through provision, we purchase natural gas from outside companies coincident with production, thereby minimizing 
our risk to changes in prices. 

We closely monitor the risks associated with changes in electricity and input fuel prices on our future operations and, where 
we consider it appropriate, use various physical and financial instruments to hedge our assets and operations from such price 
risks. 

Energy Marketing 
EBITDA from our Energy Marketing segment is affected by prices and volatility in the market, overall strategies adopted 
and  changes  in  regulation  and  legislation.  We  continuously  monitor  both  the  market  and  our  exposure  to  maximize 
earnings while still maintaining an acceptable risk profile. Our 2018 objective for Energy Marketing is for the segment to 
contribute between $60 million to $80 million in gross margin for the year.    

Exposure to Fluctuations in Foreign Currencies 
Our strategy is to minimize the impact of fluctuations in the Canadian dollar against the US dollar, the Australian dollar, 
and the euro by offsetting foreign-denominated assets with foreign-denominated liabilities and by entering into foreign 
exchange contracts.  We also have foreign-denominated expenses, including interest charges, which largely offset our net 
foreign-denominated revenues. 

M31
TRANSALTA CORPORATION M31 

TransAlta Corporation    |    2017  Annual Integrated Report 
 
 
 
 
 
 
 
 
 
Management’s Discussion and Analysis

Net Interest Expense 
Net interest expense for 2018 is expected to be lower than in 2017 largely due to lower levels of debt.  However, changes 
in interest rates and in the value of the Canadian dollar relative to the US dollar can affect the amount of net interest 
expense incurred. 

Net Debt, Liquidity, and Capital Resources 
We expect to maintain adequate available liquidity under our committed credit facilities. We currently have access to  
$1.6 billion in liquidity, including more than $300 million in cash. Our continued focus will be toward repositioning our 
capital structure and we expect to be well positioned to address the upcoming debt maturities in 2018 and 2019.  

Kent Hills 3 Wind Expansion 
Total  construction  costs  of  our  17.25  MW  Kent  Hills  3  wind  expansion  in  New  Brunswick  are  expected  to  be 
approximately $41 million. To date we have spent $9 million. Our 17 per cent partner on the existing Kent Hills facilities 
is participating in the expansion project and also owns a 17 per cent interest. They will be funding their share of the total 
project costs. Our target completion date is the fourth quarter of 2018.  

A significant portion of our sustaining and productivity capital is planned major maintenance, which includes inspection, 
repair  and  maintenance  of  existing  components,  and  the  replacement  of  existing  components.  Planned  major 
maintenance costs are capitalized as part of PP&E and are amortized on a straight-line basis over the term until the next 
major maintenance event. It excludes amounts for day-to-day routine maintenance, unplanned maintenance activities, 
and minor inspections and overhauls, which are expensed as incurred.  

Our estimate for total sustaining and productivity capital is allocated among the following:  

Category

Description

Routine capital(1)

Capital required to maintain our existing generating capacity

Planned major maintenance

Regularly scheduled major maintenance

Mine capital

Finance leases

Total sustaining capital 

Capital related to mining equipment and land purchases

Payments on finance leases

Flood-recovery capital

Capital arising from the 2013 Alberta flood

Total sustaining capital 
Productivity capital

Projects to improve power production efficiency and 
  corporate improvement initiatives

Total sustaining and productivity capital

Significant planned major outages for 2018 include the following:   
▪ 
▪ 
▪ 
▪ 

a major outage in our Canadian Coal segment, which one of our partners operates;  
a major outage at our US Coal segment scheduled for the second quarter; 
a major outage in our Canadian Gas segment related to our Sarnia facility; and 
distributed expenditures across our wind and hydro fleet. 

Spent in 
2016

Spent in 
2017

83

148

23

16
270

2
272

8
280

69

121

28

17
235

-
235

24
259

Expected 
spend 
in 2018

71 - 74

71 - 74

32 - 34

23 - 25
195 - 205

-
195 - 205

20 - 30
215 - 235

1 

Lost production as a result of planned major maintenance, excluding planned major maintenance for US Coal, which is 
scheduled during a period of economic dispatching, is estimated as follows for 2018: 

(1)  Includes hydro life extension expenditures. 

M32
M32  TRANSALTA CORPORATION 

TransAlta Corporation    |    2017  Annual Integrated Report 
 
 
 
 
                      
                        
 
 
                                                 
Management’s Discussion and Analysis

GWh lost

Coal

Gas and 
Renewables

Total

130 - 170

600 - 700

730 - 870

Funding of Capital Expenditures 
Funding for these planned capital expenditures is expected to be provided by cash flow from operating activities, existing 
liquidity, and capital raised from our contracted cash flows. We have access to approximately $1.6 billion in liquidity, if 
required. The funds required for committed growth, sustaining capital, and productivity projects are not expected to be 
significantly impacted by the current economic environment.  

Other Consolidated Analysis
As  part  of  the  Corporation’s  monitoring  controls,  long-range  forecasts  are  prepared  for  each  cash-generating  unit 
Asset Impairment Charges and Reversals 
(“CGU”). The long-range forecast estimates are used to assess the significance of potential indicators of impairment and 
provide criteria to evaluate adverse changes in operations. The Corporation also considers the relationship between its 
market  capitalization  and  its  book  value,  among  other  factors,  when  reviewing  for  indicators  of  impairment.  When 
indicators of impairment are present, the Corporation estimates a recoverable amount for each CGU by calculating an 
approximate fair value less costs of disposal using discounted cash flow projections based on the Corporation’s long-range 
forecasts.  The  valuations  used  are  subject  to  measurement  uncertainty  based  on  assumptions  and  inputs  to  the 
Corporation’s long-range forecast, including changes to fuel costs, operating costs, capital expenditures, external power 
prices, and useful lives of the assets extending to the last planned asset retirement in 2073. 

During 2017, 2016, and 2015, uncertainty continued to exist within the province of Alberta regarding the Government's 
A. Alberta Merchant CGU 
Climate Leadership Plan (“CLP”), the future design parameters of the Alberta electricity market, and federal policies on 
the  carbon  levy  and  GHG  emissions.  Economic  conditions  also  contributed  to  continued  oversupply  conditions  and 
depressed market prices throughout 2015 to 2017. The Corporation assessed whether these factors, and events arising 
during the latter part of 2016, which are more fully discussed below, presented an indicator of impairment for its Alberta 
Merchant  CGU.  In  consideration  of  the  composition  of  this  CGU,  the  Corporation  determined  that  no  indicators  of 
impairment were present with respect to the Alberta Merchant CGU. Due to this determination, the Corporation did not 
perform an in-depth impairment analysis for any of these years, but for all years, a sensitivity analysis associated with 
these factors was performed to confirm continued existence of adequate excess of estimated recoverable amount over 
book value. This analysis of the Alberta Merchant CGU continued to demonstrate a substantial cushion at the Alberta 
Merchant CGU in each of 2017, 2016, and 2015, due to the Corporation’s large merchant renewable fleet in the province. 

I. 2017  
Sundance Unit 1 
In the second quarter of 2017, the Corporation recognized an impairment charge on Sundance Unit 1 in the amount of 
$20 million due to the Corporation’s decision to early retire Sundance Unit 1. Previously, the Corporation had expected 
Sundance Unit 1 to operate in the merchant market in 2018 and 2019 and therefore remain within the Alberta Merchant 
CGU where significant cushion exists. The impairment assessment was based on value in use and included the estimated 
future cash flows expected to be derived from the Unit until its retirement on Jan. 1, 2018. Discounting did not have a 
material impact. 

No  separate  stand-alone  impairment  test  was  required  for  Sundance  Unit  2,  as  mothballing  the  Unit  maintains  the 
Corporation’s flexibility to operate the Unit as part of the Corporation’s Alberta Merchant CGU unit to 2021.  

M33
TRANSALTA CORPORATION M33 

TransAlta Corporation    |    2017  Annual Integrated Report 
 
 
 
 
 
Management’s Discussion and Analysis

II. 2016  
On Nov. 24, 2016, the Corporation reached an OCA with the Government of Alberta to receive annual cash payments of 
approximately $37.4 million, net to the Corporation in return for ceasing coal-fired generation by the end of 2030, among 
other conditions. Furthermore, the Corporation entered into an MOU on Nov. 24, 2016, with the purpose of collaborating 
and co-operating to advance objectives of the Alberta CLP. Specifically, the parties undertook to collaborate on, among 
other things: 
▪ 

a move toward a capacity market, commencing in 2021, compared to the current energy-only market. Under a 
capacity market, generators are compensated for their available capacity;  
development of a policy and to facilitate the economic conversion of some coal-fired generation to natural-gas-
fired generation in Alberta, including securing regulatory co-operation from the federal government; and 
policy development to address the value of carbon reductions in the generation of electricity from existing wind 
and hydro production, the development of effective supporting mechanisms to ensure that existing renewable 
generation  is  not  adversely  impacted  by  the  implementation  of  a  capacity  market  in  Alberta,  and  the 
development  of  regulatory  clarity  and  alignment  so  as  to  permit  the  economic  and  timely  development  of 
hydroelectric projects within Alberta. 

▪ 

▪ 

The MOU does not create any legally binding obligations between the Government and the Corporation and does not 
impose any obligations on, or constrain the discretion and authority of the Alberta government. The announcement of the 
intention  to  move  to  a  capacity  market  is  expected  to  impact  the  Alberta  market  mechanisms.  The  introduction  of  a 
capacity  market  to  replace  Alberta’s  current  market  structure  could  impact  the  Corporation’s  determination  of  the 
Alberta  Merchant  CGU;  however,  there  is  not  currently  sufficient  information  from  the  Government  or  the  Alberta 
Electric System Operator (“AESO”), which is overseeing the development of the capacity market, to determine if a change 
is required.  The Corporation has not  modified its previous conclusions  on the determination of the Alberta Merchant 
CGU. 

On Jan. 26, 2017, the Corporation announced the sale of its 51 per cent interest in the Wintering Hills merchant wind 
facility for approximately $61 million. In connection with this sale, the Wintering Hills assets were accounted for as held 
for sale at Dec. 31, 2016. As required, the Corporation assessed the assets for impairment before classifying them as held 
for sale.  Accordingly, the Corporation recorded an impairment charge of $28 million using the purchase price in the sale 
agreement as the indicator of fair value less cost of disposal in 2016. 

III. 2015 
In 2015, the Government announced its CLP, which broadly called for the phase-out of coal-generated electricity by 2030, 
and  proposed  the  imposition  of  additional  compliance  obligations  for  GHG  emissions  in  the  province.  In  2016,  the 
Government refined its approach to GHG emissions by announce the adoption of a levy on carbon emissions in excess of 
defined  limits,  amounting  to  $20  per  tonne  in  2017  and  $30  per  tonne  in  2018.  At  the  federal  level,  the  Canadian 
government announced its intention to implement a national price on GHG emissions. Under this proposal, beginning in 
2018, there would be a price of $10 per tonne of carbon dioxide equivalent emitted, rising to $50 per tonne by 2022. 

The Corporation considered possible indicators of impairment at US Coal in 2017, 2016, and 2015, as discussed in more 
B. US Coal 
detail below. 

Fair  value  less  costs  of  disposal  of  the  CGU  was  estimated  to  approximate  its  carrying  amount,  and  accordingly,  no 
impairment charge was recorded in 2017, 2016 or 2015. Any adverse change in assumptions, in isolation, would not have 
resulted in an impairment charge being recorded. The Corporation continues to manage risks associated with the CGU by 
optimizing its operating activities and capital plan. 

The valuations are subject to measurement uncertainty based on the key assumptions outlined below, and on inputs to 
the Corporation’s long-range forecast, including changes to fuel costs, operating costs, capital expenses and the level of 
contractedness under the Memorandum of Agreement for coal transition established with the State of Washington. The 
valuation period extended to the assumed decommissioning of the plant, after its projected cessation of operation in its 
current form in 2025. 

M34
M34  TRANSALTA CORPORATION 

TransAlta Corporation    |    2017  Annual Integrated Report 
 
 
 
 
 
 
Management’s Discussion and Analysis

I. 2017  
During 2017, the Corporation renegotiated rail transportation and coal supply agreements. Accordingly, the Corporation 
completed an estimate of the impact for the coal cost changes combined with updated power prices to determine whether 
the US Coal CGU had an indicator of impairment. The Corporation concluded that there is no indicator of impairment. 
The Corporation utilized the Corporation's long-range forecast and the following key assumptions: 

Mid-Columbia annual average power prices 
On-highway diesel fuel on coal shipments 
Discount rates 

US$21.50 to US$34.81 per MWh 
US$2.08 to 2.29 per gallon 
7.9 to 9.0 per cent 

II. 2016  
During 2016, the Corporation considered possible impairment at the US Coal CGU and found that the fair value less costs 
to sell approximated the then current carrying amount. The Corporation estimated the fair value less costs of disposal of 
the  CGU,  a  Level  III  fair  value  measurement,  utilizing  the  Corporation’s  long-range  forecast  and  the  following  key 
assumptions: 

Mid-Columbia annual average power prices 
On-highway diesel fuel on coal shipments 
Discount rates 

US$22.00 to US$46.00 per MWh 
US$1.69 to 2.09 per gallon 
5.4 to 5.7 per cent 

III. 2015 
During 2015, the Corporation considered possible impairment at the US Coal CGU and found that the fair value, less costs 
to sell approximated the then current carrying amount. The Corporation estimated the fair value less costs of disposal of 
the  CGU,  a  Level  III  fair  value  measurement,  utilizing  the  Corporation’s  long-range  forecast  and  the  following  key 
assumptions: 

Mid-Columbia annual average power prices 
On-highway diesel fuel on coal shipments 
Discount rates 

US$24.00 to US$50.00 per MWh 
US$2.44 to 2.90 per gallon 
5.2 to 6.2 per cent 

In 2015, an impairment reversal of $2 million resulted from additional recoveries from the disposal of the Centralia gas 
plant in 2014. 

Disclosure  is  required  of  all  unconsolidated  structured  entities  or  arrangements  such  as  transactions,  agreements,  or 
Unconsolidated Structured Entities or Arrangements
contractual arrangements with unconsolidated entities, structured finance entities, special purpose entities, or variable 
interest entities that are reasonably likely to materially affect liquidity or the availability of, or requirements for, capital 
resources. We currently have no such unconsolidated structured entities or arrangements. 

We have obligations to issue letters of credit and cash collateral to secure potential liabilities to certain parties, including 
Guarantee Contracts  
those related to potential environmental obligations, commodity risk management and hedging activities, construction 
projects, and purchase obligations. At Dec. 31, 2017, we provided letters of credit totalling $677 million (2016 - $566 
million) and cash collateral of $67 million (2016 - $77 million). These letters of credit and cash collateral secure certain 
amounts  included  on  our  Consolidated  Statements  of  Financial  Position  under  risk  management  liabilities  and 
decommissioning and other provisions. 

M35
TRANSALTA CORPORATION M35 

TransAlta Corporation    |    2017  Annual Integrated Report 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Management’s Discussion and Analysis

Contractual commitments are as follows: 
Commitments1 

2018

2019

2020

2021

2022

 2023 and 
  thereafter 

Natural gas, transportation, 
  and other purchase contracts

Transmission
Coal supply and mining agreements(1)

Long-term service agreements
Non-cancellable operating leases(2)

Long-term debt(3)

Principal payments on finance 
  lease obligations
Interest on long-term debt and
  finance lease obligations(4)

Growth

TransAlta Energy Transition Bill

Total

48

9

155

108

9

730

18

177

27

6

1,287

7

6

159

50

9

469

15

153

-

6

874

5

6

161

41

9

472

12

125

-

6

837

Total

98

24

608

280

156

5

3

23

31

9

4

-

14

15

9

29

-

96

35

111

100

581

1,312

3,664

6

102

-

6

285

4

95

-

6

14

69

692

1,344

-

6

27

36

728

2,295

6,306

As  part  of  the  TransAlta  Energy  Transition  Bill  signed  into  law  in  the  State  of  Washington  and  the  subsequent 
Memorandum of Agreement, we have committed to fund US$55 million over the remaining life of the US Coal plant to 
support economic and community development, promote energy efficiency, and develop energy technologies related to 
the improvement of the environment. The Memorandum of Agreement contains certain provisions for termination and in 
the event of the termination and certain circumstances, this funding or part thereof would no longer be required.  

I. Line Loss Rule Proceeding 
TransAlta has been participating in a line loss rule proceeding (the “LLRP”) before the AUC. The AUC determined that it 
Contingencies 
has the ability to retroactively adjust line loss charges going back to 2006 and directed the AESO to, among other things, 
perform such retroactive calculations. The various decisions by the AUC are, however, subject to appeal and challenge.  A 
recent decision by the AUC determined the methodology to be used retroactively and it is now possible to estimate the 
total retroactive potential exposure faced by TransAlta for its non-PPA MWs.  The estimate of the maximum exposure is 
$15 million; however, if TransAlta and others are successful on the appeal of legal and jurisdictional questions regarding 
retroactivity, the amount owing will be nil; TransAlta accordingly recorded an appropriate provision in 2017. 

II. FMG Disputes 
The  Corporation  is  currently  engaged  in  litigation  with  FMG  as  a  result  of  their  purported  termination  of  the  South 
Hedland PPA. In addition, FMG withheld approximately AUD58.2 million, including AUD43 million in tax applicable to the 
repurchase  of  the  Solomon  Power  Station.   TransAlta  is  seeking  payment  of  all  withheld  amounts  and  has  currently 
commenced proceedings to recover approximately AUD54.1 million by filing and serving FMG with a Writ and Statement 
of Claim on Nov. 17, 2017; TransAlta has also applied for summary judgment for this amount.  The hearing is scheduled 
for  
March 23, 2018.   

(1)   Commitments related to Sheerness and Genesee 3 may be impacted by the cessation of coal-fired emissions on or before Dec. 31, 2030. 
(2)  Includes amounts under certain evergreen contracts on the assumption of the Corporation's continued operations. 
(3)  Excludes impact of derivatives. 
(4)  Interest on long-term debt is based on debt currently in place with no assumption as to refinancing on maturity.

M36
M36  TRANSALTA CORPORATION 

TransAlta Corporation    |    2017  Annual Integrated Report 
                    
                       
                       
                       
                       
                    
                    
                       
                       
                       
                       
                         
                         
                    
                 
                 
                 
                    
                    
                    
                 
                 
                    
                    
                    
                    
                    
                 
                       
                       
                       
                       
                       
                 
                 
                 
                 
                 
                 
                 
             
             
                    
                    
                    
                       
                       
                    
                    
                 
                 
                 
                 
                    
                 
             
                    
                         
                         
                         
                         
                         
                    
                       
                       
                       
                       
                       
                       
                    
             
                 
                 
                 
                 
             
             
 
 
 
                                                 
Management’s Discussion and Analysis

The selection and application of accounting policies is an important process that has developed as our business activities 
Critical Accounting Policies and Estimates  
have evolved and as accounting rules and guidance have changed. Accounting rules generally do not involve a selection 
among alternatives, but involve an implementation and interpretation of existing rules and the use of judgment relative 
to the circumstances existing in the business. Every effort is made to comply with all applicable rules on or before the 
effective date, and we believe the proper implementation and consistent application of accounting rules is critical.  

However, not all situations are specifically addressed in the accounting literature. In these cases, our best judgment is 
used to adopt a policy for accounting for these situations. We draw analogies to similar situations and the accounting 
guidelines governing them, consider foreign accounting standards, and consult with our independent auditors about the 
appropriate  interpretation  and  application  of  these  policies.  Each  of  the  critical  accounting  policies  involves  complex 
situations  and  a  high  degree  of  judgment  either  in  the  application  and  interpretation  of  existing  literature  or  in  the 
development of estimates that impact our consolidated financial statements.  

Our significant accounting policies are described in Note 2 to our audited consolidated financial statements within this 
Annual  Report.  The  most  critical  of  these  policies  are  those  related  to  revenue  recognition,  financial  instruments, 
valuation of PP&E and associated contracts, project development costs, useful life of PP&E, valuation of goodwill, leases, 
income taxes, employee future benefits, decommissioning and restoration provisions, and other provisions. Each policy 
involves a number of estimates and assumptions to be made about matters that are uncertain at the time the estimate is 
made.  Different  estimates,  with  respect  to  key  variables  used  for  the  calculations,  or  changes  to  estimates,  could 
potentially have a material impact on our financial position or results of operations. 

We  have  discussed  the  development  and  selection  of  these  critical  accounting  estimates  with  our  Audit  and  Risk 
Committee (“ARC”) and our independent auditors. The ARC has reviewed and approved our disclosure relating to critical 
accounting estimates in this MD&A. 

These critical accounting estimates are described as follows: 

The majority of our revenues are derived from the sale of physical power, leasing of power facilities, and from commodity 
Revenue Recognition  
risk management activities.  

Revenues  under  long-term  electricity  and  thermal  sales  contracts  generally  include  one  or  more  of  the  following 
components:  fixed  capacity  payments  for  availability,  energy  payments  for  generation  of  electricity,  incentives  or 
penalties  for  exceeding  or  not  meeting  availability  targets,  excess  energy  payments  for  power  generation  above 
committed capacity, and ancillary services. Each of these components is recognized upon output, delivery, or satisfaction 
of contractually specific targets. Revenues from non-contracted capacity are comprised of energy payments, at market 
prices, for each MWh produced and are recognized upon delivery.  

In certain situations, a long-term electricity or thermal sales contract may contain, or be considered, a lease. Where the 
terms and conditions of the contract result in the customer assuming the principal risks and rewards of ownership of the 
underlying asset, the contractual arrangement is considered a finance lease, which results in the recognition of finance 
lease income. Where we retain the principal risks and rewards, the contractual arrangement is an operating lease. Rental 
income, including contingent rents where applicable, is recognized over the term of the contract. Revenues associated 
with non-lease elements are recognized as goods or services revenues as outlined above.  

Commodity risk management activities involve the use of derivatives such as physical and financial swaps, forward sales 
contracts, and futures contracts and options, to earn trading revenues and to gain market information. These derivatives 
are accounted for using fair value accounting when hedge accounting is not applied. The initial recognition of fair value 
and  subsequent  changes  in  fair  value  affect  reported  earnings  in  the  period  the  change  occurs.  The  fair  values  of 
instruments that remain open at the end of a reporting period represent unrealized gains or losses and are presented on 
the Consolidated Statements of Financial Position as risk management assets or liabilities.  

M37
TRANSALTA CORPORATION M37 

TransAlta Corporation    |    2017  Annual Integrated Report 
 
 
 
 
 
 
 
 
 
Management’s Discussion and Analysis

The determination of the fair value of commodity risk management contracts and derivative instruments is complex and 
relies on judgments concerning future prices, volatility, and liquidity, among other factors. Some of our derivatives are not 
traded on an active exchange or extend beyond the time period for which exchange-based quotes are available, requiring 
us to use internal valuation techniques or models. 

The fair value of a financial instrument is the price that would be received to sell an asset or paid to transfer a liability in 
Financial Instruments  
an orderly transaction between market participants at the measurement date. Fair values can be determined by reference 
to prices for instruments in active markets to which we have access. In the absence of an active market, we determine fair 
values based on valuation models or by reference to other similar products in active markets. 

Fair values determined using valuation models require the use of assumptions. In determining those assumptions, we look 
primarily to external readily observable market inputs.  However,  if not  available,  we use inputs that are not based on 
observable market data. 

Level Determinations and Classifications 
The Level I, II, and III classifications in the fair value hierarchy utilized by the Corporation are defined below. The fair value 
measurement of a financial instrument is included in only one of the three levels, the determination of which is based on 
the lowest level input that is significant to the derivation of the fair value. 

Level I  
Fair  values  are  determined  using  inputs  that  are  quoted  prices  (unadjusted)  in  active  markets  for  identical  assets  or 
liabilities that we have the ability to access. In determining Level I fair values, we use quoted prices for identically traded 
commodities obtained from active exchanges such as the New York Mercantile Exchange.  

Level II  
Fair values are determined, directly or indirectly, using inputs that are observable for the asset or liability.  

Fair values falling within the Level II category are determined through the use of quoted prices in active markets, which in 
some  cases  are  adjusted  for  factors  specific  to  the  asset  or  liability,  such  as  basis,  credit  valuation,  and  location 
differentials. Our commodity risk management Level II financial instruments include over-the-counter derivatives with 
values based on observable commodity futures curves and derivatives with inputs validated by broker quotes or other 
publicly available market data providers. Level II fair values are also determined using valuation techniques, such as option 
pricing models and regression or extrapolation formulas, where the inputs are readily observable, including commodity 
prices for similar assets or liabilities in active markets, and implied volatilities for options.  

In determining Level II fair values of other risk management assets and liabilities, we use observable inputs other than 
unadjusted quoted prices that are observable for the asset or liability, such as interest rate yield curves and currency rates. 
For  certain  financial  instruments  where  insufficient  trading  volume  or  lack  of  recent  trades  exists,  we  rely  on  similar 
interest or currency rate inputs and other third-party information such as credit spreads.  

Level III  
Fair values are determined using inputs for the asset or liability that are not readily observable. 

We may enter into commodity transactions for which market-observable data is not available. In these cases, Level III fair 
values are determined using valuation techniques such as the Black-Scholes, mark-to-forecast, and historical bootstrap 
models with inputs that are based on historical data such as unit availability, transmission congestion, demand profiles for 
individual  non-standard  deals  and  structured  products,  and/or  volatilities  and  correlations  between  products  derived 
from historical prices. We also have various contracts with terms that extend beyond a liquid trading period. As forward 
market prices are not available for the full period of these contracts, the value of these contracts is derived by reference 
to a forecast that is based on a combination of external and internal fundamental modelling, including discounting. As a 
result, these contracts are classified in Level III. 

M38
M38  TRANSALTA CORPORATION 

TransAlta Corporation    |    2017  Annual Integrated Report 
 
 
 
 
 
 
 
 
 
 
Management’s Discussion and Analysis

We have a Commodity Exposure Management Policy that governs both the commodity transactions undertaken in our 
proprietary trading business and those undertaken to manage commodity price exposures in our generation business. 
This  Policy  defines  and  specifies  the  controls  and  management  responsibilities  associated  with  commodity  trading 
activities, as well as the nature and frequency of required reporting of such activities.  

Methodologies and procedures regarding commodity risk management Level III fair value measurements are determined 
by  our  risk  management  department.  Level  III  fair  values  are  calculated  within  our  energy  trading  risk  management 
system  based  on  underlying  contractual  data  as  well  as  observable  and  non-observable  inputs.  Development  of  non-
observable  inputs  requires  the  use  of  judgment.  To  ensure  reasonability,  system-generated  Level  III  fair  value 
measurements are reviewed and validated by the risk management and finance departments. Review occurs formally on 
a quarterly basis or more frequently if daily review and monitoring procedures identify unexpected changes to fair value 
or changes to key parameters.  

The effect of using reasonably possible alternative assumptions as inputs to valuation techniques from which the Level III 
commodity risk management fair values are determined at Dec. 31, 2017, is an estimated total upside of $156 million  
(2016 - $94 million upside) and total downside of $157 million (2016 - $89 million) impact to the carrying value of the 
financial instruments. Fair values are stressed for volumes and prices. The amount of $130 million upside (2016  - $76 
million upside) and $130 million downside (2016 - $69 million downside) in the stress values stems from a long-dated 
power  sale  contract  in  the  Pacific  Northwest  that  is  designated  as  a  cash  flow  hedge  utilizing  assumed  power  prices 
ranging from US$25 to US$34 for the period from 2019 to 2025, while the remaining amounts account for the rest of the 
portfolio. The variable volumes are stressed up and down one standard deviation from historically available production 
data. Prices are stressed for longer-term deals where there are no liquid market quotes using various internal and external 
forecasting sources to establish a high and a low price range.  

At the end of each reporting period, we assess whether there is any indication that a PP&E or intangible asset is impaired. 
Valuation of PP&E and Associated Contracts  
Impairment exists when the carrying amount of the asset or CGU to which it belongs exceeds its recoverable amount, 
which is the higher of fair value less costs of disposal and value in use.  

Factors  that  could  indicate  that  an  impairment  exists  include:  significant  underperformance  relative  to  historical  or 
projected operating results; significant changes in the manner in which an asset is used or in our overall business strategy; 
or  significant  negative  industry  or  economic  trends.  In  some  cases,  these  events  are  clear.  However,  in  many  cases,  a 
clearly  identifiable  event  indicating  possible  impairment  does  not  occur.  Instead,  a  series  of  individually  insignificant 
events occur over a period of time leading to an indication that an asset may be impaired. This can be further complicated 
in situations where we are not the operator of the facility. Events can occur in these situations that may not be known until 
a date subsequent to their occurrence. 

Our operations, the market, and business environment are routinely monitored, and judgments and assessments are made 
to determine whether an event has occurred that indicates a possible impairment. If such an event has occurred, an estimate 
is made of the recoverable amount of the PP&E or CGU to which it belongs. Recoverable amount is the higher of an asset’s 
fair value less costs of disposal and its value in use. Fair value is the price that would be received to sell an asset in an orderly 
transaction  between  market  participants  at  the  measurement  date.  In  determining  fair  value  less  costs  of  disposal, 
information about third-party transactions for similar assets is used and if none is available, other valuation techniques, such 
as discounted cash flows, are used. Value in use is computed using the present value of management’s best estimates of future 
cash flows based on the current use and present condition of the asset. In estimating either fair value less costs of disposal or 
value in use using discounted cash flow methods, estimates and assumptions must be made about sales prices, cost of sales, 
production, fuel consumed, retirement costs, and other related cash inflows and outflows over the life of the facilities, which 
can  range  from  30  to  60  years.  In  developing  these  assumptions,  management  uses  estimates  of  contracted  and  future 
market prices based on expected market supply and demand in the region in which the plant operates, anticipated production 
levels,  planned  and  unplanned  outages,  and  transmission  capacity  or  constraints  for  the  remaining  life  of  the  facilities. 
Appropriate  discount  rates  reflecting  the  risks  specific  to  the  asset  under  review  are  used  in  the  assessments.  These 
estimates and assumptions are susceptible to change from period to period and actual results can, and often do, differ from 
the estimates,  and can have  either a  positive or negative  impact on the estimate of the  impairment charge,  and may be 
material.  

M39
TRANSALTA CORPORATION M39 

TransAlta Corporation    |    2017  Annual Integrated Report 
 
 
 
 
 
Management’s Discussion and Analysis

The impairment outcome can also be impacted by the determination of CGUs or groups of CGUs for asset and goodwill 
impairment  testing.  A  CGU  is  the  smallest  identifiable  group  of  assets  that  generates  cash  inflows  that  are  largely 
independent of the cash inflows from other assets or groups of assets, and goodwill is allocated to each CGU or group of 
CGUs that is expected to benefit from the synergies of the acquisition from which the goodwill arose. The allocation of 
goodwill is reassessed upon changes in the composition of segments, CGUs, or groups of CGUs. In respect of determining 
CGUs, significant judgment is required to determine what constitutes independent cash flows between power plants that 
are connected to the same system. We evaluate the market design, transmission constraints, and the contractual profile 
of each facility, as well as our commodity price risk management plans and practices, in order to inform this determination. 
With regard to the allocation or reallocation of goodwill, significant judgment is required to evaluate synergies and their 
impacts.  Minimum thresholds also exist  with respect to segmentation and internal monitoring activities. We evaluate 
synergies with regard to opportunities from combined talent and technology, functional organization, and future growth 
potential, and we consider our own performance measurement processes in making this determination. 

As a result of our review in 2017 and other specific events, various analyses were completed to assess the significance of 
possible impairment indicators. Refer to the Asset Impairment Charges and Reversals section of this MD&A for further 
details.  

Impairment charges can be reversed in future periods if circumstances improve. No assurances can be given if any reversal 
will occur or the amount or timing of any such reversal. 

Deferred project development costs include external, direct, and incremental costs that are necessary for completing an 
Project Development Costs
acquisition  or  construction  project.  These  costs  are  recognized  in  operating  expenses  until  construction  of  a  plant  or 
acquisition of an investment is likely to occur, there is reason to believe that future costs are recoverable, and that efforts 
will result in future value to us, at which time the costs incurred subsequently are included in PP&E or investments. The 
appropriateness of capitalization of these costs is evaluated each reporting period, and amounts capitalized for projects 
no longer probable of occurring are charged to net earnings.  

Each significant component of an item of PP&E is depreciated over its estimated useful life. A component is a tangible 
Useful Life of PP&E 
asset that can be separately identified as an asset and is expected to provide a benefit of greater than one year. Estimated 
useful  lives  are  determined  based  on  current  facts  and  past  experience,  and  take  into  consideration  the  anticipated 
physical life of the asset, existing long-term sales agreements and contracts, current and forecasted demand, the potential 
for technological obsolescence, and regulations. The useful lives of PP&E and depreciation rates used are reviewed at 
least annually to ensure they continue to be appropriate.  

In  2017,  total  depreciation  and  amortization  expense  was  $708  million  (2016  -  $664  million),  of  which  $75  million  
(2016 - $65 million) relates to mining equipment and is included in fuel and purchased power.  

As a result of the OCA with the Government of Alberta described in the Significant and Subsequent Events section of this 
MD&A, we will cease coal-fired emissions by the end of 2030. On Jan. 1, 2017, the useful lives of the PP&E and amortizable 
intangibles associated with some of our Alberta coal assets were reduced to 2030. See Accounting Changes section of 
this MD&A for further details. 

We evaluate goodwill for impairment at least annually, or more frequently if indicators of impairment exist. If the carrying 
Valuation of Goodwill 
amount of a CGU or group of CGUs, including goodwill, exceeds the unit’s fair value, the excess represents a goodwill 
impairment  loss.  A  CGU  is  the  smallest  identifiable  group  of  assets  that  generates  cash  inflows  that  are  largely 
independent of the cash inflows from other assets or groups of assets.  

For purposes of the 2017 and 2016 annual goodwill impairment review, the Corporation determined the recoverable 
amounts of the Wind and Solar CGU units by calculating the fair value less costs of disposal using discounted cash flow 
projections based on the Corporation’s long-range forecasts for the period extending to the last planned asset retirement 
in 2073. The resulting fair value measurement is categorized within Level III of the fair value hierarchy. During 2017, the 

M40
M40  TRANSALTA CORPORATION 

TransAlta Corporation    |    2017  Annual Integrated Report 
 
 
 
 
 
 
 
 
Management’s Discussion and Analysis

Corporation carried forward detailed recoverable amounts regarding the Hydro and Energy Marketing CGUs as specific 
criteria were met. 

We reviewed the carrying amount of goodwill prior to year-end and determined that the fair values of the related CGUs 
or groups of CGUs to which goodwill relates, based on estimates of future cash flows, exceeded their carrying amounts, 
and no goodwill impairments existed. 

Determining the fair value of the CGUs or group of CGUs is susceptible to changes from period to period as management 
is required to make assumptions about future cash flows, production and trading volumes, margins, and fuel and operating 
costs. Had assumptions been made that resulted in fair values of the CGUs or groups of CGUs declining by five per cent 
from current levels, there would not have been any impairment of goodwill at our Wind and Solar CGU.  

In determining whether the Corporation’s PPAs and other long-term electricity and thermal sales contracts contain, or 
Leases 
are, leases, management must use judgment in assessing whether the fulfillment of the arrangement is dependent on the 
use of a specific asset and the arrangement conveys the right to use the asset. For those agreements considered to contain, 
or be, leases, further judgment is required to determine whether substantially all of the significant risks and rewards of 
ownership are transferred to the customer or remain with TransAlta, to appropriately account for the agreement as either 
a finance or operating lease. These judgments can be significant to how we classify amounts related to the arrangement 
as either PP&E or as a finance lease receivable on the Consolidated Statements of Financial Position, and therefore the 
value of certain items of revenue and expense is dependent upon such classifications.  

In accordance with IFRS, we use the liability method of accounting for income taxes. Under the liability method, deferred 
Income Taxes 
income tax assets and liabilities are recognized on the differences between the carrying amounts of assets and liabilities 
and their respective income tax basis. 

Preparation of the consolidated financial statements involves determining an estimate of, or provision for, income taxes in 
each of the jurisdictions in which we operate. The process also involves making an estimate of taxes currently payable and 
taxes expected to be payable or recoverable in future periods, referred to as deferred income taxes. Deferred income taxes 
result from the effects of temporary differences due to items that are treated differently for tax and accounting purposes. 
The tax effects of these differences are reflected in the Consolidated Statements of Financial Position as deferred income 
tax assets and liabilities. An assessment must also be made to determine the likelihood that our future taxable income will be 
sufficient to permit the recovery of deferred income tax assets. To the extent that such recovery is not probable, deferred 
income tax assets must be reduced. The reduction of the deferred income tax asset can be reversed if the estimated future 
taxable income improves. No assurances can be given if any reversal will occur or the amount or timing of any such reversal. 
Management  must  exercise  judgment  in  its  assessment  of  continually  changing  tax  interpretations,  regulations,  and 
legislation to ensure deferred income tax assets and liabilities are complete and fairly presented. Differing assessments and 
applications than our estimates could materially impact the amount recognized for deferred income tax assets and liabilities. 
Our tax filings are subject to audit by taxation authorities. The outcome of some audits may change our tax liability, although 
we believe that we have adequately provided for income taxes in accordance with IFRS based on all information currently 
available. The outcome of pending audits is not known nor is the potential impact on the consolidated financial statements 
determinable. 

Deferred income tax assets of $24 million (2016 - $53 million) have been recorded on the Consolidated Statements of 
Financial Position as at Dec. 31, 2017. These assets primarily relate to net operating loss carryforwards. We believe there 
will be sufficient taxable income that will permit the use of these loss carryforwards in the tax jurisdictions where they 
exist. 

Deferred income tax liabilities of $549 million (2016 - $712 million) have been recorded on the Consolidated Statements 
of Financial Position as at Dec. 31, 2017. These liabilities are comprised primarily of taxes on unrealized gains from risk 
management transactions and income tax deductions in excess of related depreciation of PP&E. 

M41
TRANSALTA CORPORATION M41 

TransAlta Corporation    |    2017  Annual Integrated Report 
 
 
 
 
 
 
Management’s Discussion and Analysis

We  provide  selected  pension  and  post-employment  benefits  to  employees.  The  cost  of  providing  these  benefits  is 
Employee Future Benefits  
dependent upon many factors that result from actual plan experience and assumptions of future experience. 

The liabilities for future benefits and associated pension costs included in annual compensation expenses are impacted 
by employee demographics, including age, compensation levels, employment periods, the level of contributions made to 
the plans, and earnings on plan assets.  

Changes  to  the  provisions  of  the  plans  may  also  affect  current  and  future  pension  costs.  Pension  costs  may  also  be 
significantly  impacted  by  changes  in  key  actuarial  assumptions,  including,  for  example,  the  discount  rates  used  in 
determining the defined benefit obligation and the net interest cost on the net defined benefit liability. The discount rate 
used to estimate our obligation reflects high-quality corporate fixed income securities currently available and expected 
to be available during the period to maturity of the pension benefits. 

The plan assets are comprised primarily of equity and fixed income investments. Fluctuations in the return on plan assets 
as a result of actual equity market returns and changes in interest rates may result in increased or decreased pension costs 
in future periods. 

We recognize decommissioning and restoration provisions for PP&E in the period in which they are incurred if there is a 
Decommissioning and Restoration Provisions 
legal or constructive obligation to reclaim the plant or site. The amount recognized as a provision is the best estimate of 
the expenditures required to settle the provision. Expected values are probability weighted to deal with the risks and 
uncertainties  inherent  in  the  timing  and  amount  of  settlement  of  many  decommissioning  and  restoration  provisions. 
Expected values are discounted  at the risk-free  interest rate adjusted to  reflect the market’s evaluation of our credit 
standing.  

As  at  Dec.  31,  2017,  the  decommissioning  and  restoration  provisions  recorded  on  the  Consolidated  Statements  of 
Financial Position were $437 million (2016 - $293 million).  During 2017, mainly as a result of the OCA, the discount rates 
used for the Canadian coal and mining operations decommissioning provisions were changed to use the 5 to 15-year rates. 
The use of lower, shorter-term discount rates increased the corresponding liabilities. On average, these rates decreased 
by approximately 1.60 to 2.10 per cent.  Additionally, the amount and timing of cash outflows for certain Canadian coal 
plants and mining operations was also revised, resulting in an increase to the corresponding liabilities. 

We estimate the undiscounted amount of cash flow required to settle the decommissioning and restoration provisions is 
approximately $1 billion, which will be incurred between 2018 and 2073. The majority of these costs will be incurred 
between  2020  and 2050.  Some  of  the  facilities  that  are  co-located  with  mining  operations  do  not  currently  have  any 
decommissioning obligations recorded as the obligations associated with the facilities are indeterminate at this time.  

Sensitivities for the major assumptions are as follows: 

Factor

Discount rate

Undiscounted decommissioning and restoration provision

Increase or 
decrease (%)

Approximate impact 
on net earnings

1

10

3

2

Where necessary, we recognize provisions arising from ongoing business activities, such as interpretation and application 
Other Provisions 
of contract terms and force majeure claims. These provisions, and subsequent changes thereto, are determined using our 
best estimate of the outcome of the underlying event and can also be impacted by determinations made by third parties, 
in  compliance  with  contractual  requirements.  The  actual  amount  of  the  provisions  that  may  be  required  could  differ 
materially from the amount recognized. 

M42
M42  TRANSALTA CORPORATION 

TransAlta Corporation    |    2017  Annual Integrated Report 
 
 
 
 
 
 
 
                                        
                                        
 
 
Management’s Discussion and Analysis

Accounting Changes 
I. Change in Estimates - Useful Lives 
As a result of the OCA with the Government of Alberta described in the Significant and Subsequent Events section of this 
A. Current Accounting Changes 
MD&A, we will cease coal-fired emissions by the end of 2030. On Jan. 1, 2017, the useful lives of the PP&E and amortizable 
intangibles associated with some of our Alberta coal assets were reduced to 2030. As a result, depreciation expense and 
intangibles amortization for the year ended Dec. 31, 2017 increased in total by approximately $58 million. The useful lives 
may be revised or extended in compliance with the Corporation’s accounting policies, dependent upon future operating 
decisions and events, such as coal-to-gas conversions. 

Due to our decision to retire Sundance Unit 1 effective Jan. 1, 2018 (see the Significant and Subsequent Events section of 
this MD&A for further details), the useful lives of the Sundance Unit 1 PP&E and amortizable intangibles were reduced in 
the second quarter of 2017 by two years to Dec. 31, 2017. As a result, depreciation expense and intangibles amortization 
for the year ended Dec. 31, 2017, increased by approximately $26 million. 

Since Sundance Unit 1 will be shut down two years early, the federal Minister of Environment has agreed to extend the 
life of Sundance Unit 2 from 2019 to 2021. As such, during the third quarter of 2017, we extended the life of Sundance 
Unit  2  to  2021.  As  a  result,  depreciation  expense  and  intangibles  amortization  for  the  year  ended  Dec.  31,  2017, 
decreased in total by approximately $4 million. 

Accounting standards that have been previously issued by the IASB, but are not yet effective and have not been applied 
B. Future Accounting Changes 
by us, include:  

I. IFRS 15 Revenue from Contracts with Customers 
In May 2014, the IASB issued IFRS 15 Revenue from Contracts with Customers, which replaces existing revenue recognition 
guidance with a single comprehensive accounting model. The model specifies that an entity recognizes revenue when it 
transfers promised goods or services to customers in an amount that reflects the consideration to which it expects to be 
entitled in exchange for those goods or services. In April 2016, the IASB issued an amendment to IFRS 15 to clarify the 
identification  of  performance  obligations,  principal  versus  agent  considerations,  licenses  of  intellectual  property,  and 
transition practical expedients. IFRS 15, including the amendment, is required to be adopted either retrospectively or 
using  a  modified  retrospective  approach  for  annual  periods  beginning  on  or  after  Jan. 1,  2018,  with  earlier  adoption 
permitted. IFRS 15 will be applied by the Corporation on Jan. 1, 2018. 

We  have  completed  the  review  and  accounting  assessment  of  our  revenue  streams  and  underlying  contracts  with 
customers and the quantification of impacts. The majority of our revenues within the scope of IFRS 15 are earned through 
the  sale  of  capacity  and  energy  under  both  long-term  arrangements  and  merchant  mechanisms  and  from  the  sale  of 
renewable  energy  certificates.  IFRS  15  requires  the  application  of  a  five-step  model  to  determine  when  to  recognize 
revenue, and at what amount. The model specifies that an entity recognizes revenue when it transfers promised goods or 
services to customers in an amount that reflects the consideration to which it expects to be entitled in exchange for those 
goods or services. Depending on whether certain criteria are met, revenue is recognized either over time, in a manner that 
depicts the entity’s performance, or at a point in time, when control is transferred to the customer. We have not identified 
any significant differences in the timing or amount of recognition of revenue as a result of IFRS 15, with the exception of 
one difference, as discussed below.  

IFRS 15 requires that, in determining the transaction price, the promised amount of consideration is to be adjusted for the 
effects of the time value of money if the timing of payments specified in a contract provides either party with a significant 
benefit of financing the transfer of goods or services to the customer (“significant financing component”). The objective 
when adjusting the promised amount of consideration for a significant financing component is to recognize revenue at an 
amount that reflects the price that the customer would have paid, had they paid cash in the future when the goods or 
services are transferred to them. We were required to apply this to one of our contracts with a customer. The application 
of  the  significant  financing  component  requirements  results  in  the  recognition  of  interest  expense  over  the  financing 
period and a higher amount of revenue.   

M43
TRANSALTA CORPORATION M43 

TransAlta Corporation    |    2017  Annual Integrated Report 
 
 
 
 
 
Management’s Discussion and Analysis

We have chosen to apply the modified retrospective method of transition. Under this method, the comparative periods 
presented  in  the  consolidated  financial  statements  as  at  and  for  the  year  ended  Dec.  31,  2018,  will  not  be  restated. 
Instead, we will recognize the cumulative impact of the initial application of the standard in retained earnings as at Jan. 1, 
2018.  The cumulative impact of applying the significant financing component requirements to the identified contract 
results in a $12 million (net of tax impacts) charge to retained earnings. 

II. IFRS 9 Financial Instruments 
In July 2014, the IASB issued the final version of IFRS 9, which replaces IAS 39 Financial Instruments: Recognition and 
Measurement. IFRS 9 includes guidance on the classification and measurement of financial assets and financial liabilities, 
impairment of financial assets, and a new hedge accounting model. IFRS 9 is required to be adopted retrospectively for 
annual periods beginning on or after Jan. 1, 2018 with early adoption permitted. IFRS 9 will be adopted by the Corporation 
on Jan. 1, 2018. 

Under the new classification and measurement requirements, financial assets must be classified and measured at either 
amortized cost, at fair value through profit or loss, or through OCI. The classification and measurement depends on the 
contractual  cash  flow  characteristics  of  the  financial  asset  and  the  entity’s  business  model  for  managing  the  financial 
asset. The classification requirements for financial liabilities are largely unchanged from IAS 39. Based on the assessment 
performed to date, the Corporation’s classification and measurement of financial assets is not expected to be materially 
affected by the initial application of IFRS 9. 

The new general hedge accounting model is intended to be simpler and more closely focused on how an entity manages 
its  risks,  replaces  the  IAS  39  effectiveness  testing  requirements  with  the  principle  of  an  economic  relationship,  and 
eliminates the requirement for retrospective assessment of hedge effectiveness. Based on its assessment to date, the 
Corporation is not expected to be materially affected by the new general hedge accounting model. However, where the 
Corporation uses foreign exchange forward contracts to hedge anticipated payments in foreign currency, and the hedged 
transaction results in a non-financial item, the reclassification of gains or losses on the hedges will be presented directly 
in the Statement of Changes in Equity as a reclassification from accumulated other comprehensive income.  

The  Corporation  has  completed  its  implementation  plan,  which  included  reviewing  its  various  types  of  financial 
instruments to determine the impact of the new classification guidance, and assessing the historical credit loss data as 
well as considering reasonable and supportable forward-looking information that was available without undue cost or 
effort. There are no significant changes to classification and measurement identified. The Corporation is not expected to 
be materially impacted by the initial implementation of the expected credit loss impairment model. Ongoing disclosures 
are expected to be more extensive and will include information about the Corporation’s risk management strategy, how 
the risk management activities may affect the amount, timing and uncertainty of future cash flows and the effect that 
hedge  accounting  has  had  on  the  statement  of  financial  position,  the  statement  of  comprehensive  income  and  the 
statement of changes in equity. 

IFRS 16 Leases

In  January 2016,  the  IASB  issued  IFRS  16  Leases,  which  replaces  the  current  IFRS  guidance  on  leases.  Under  current 
guidance, lessees are required to determine if the lease is a finance or operating lease, based on specified criteria. Finance 
leases are recognized on the statement of financial position, while operating leases are not. Under IFRS 16, lessees must 
recognize a lease liability and a right-of-use asset for virtually all lease contracts. An optional exemption to not recognize 
certain short-term leases and leases of low value can be applied by lessees. For lessors, the accounting remains essentially 
unchanged.  IFRS 16 is effective for annual periods beginning on or after Jan. 1, 2019, with early application permitted if 
IFRS 15 is also applied at the same time. The standard is required to be adopted either retrospectively or using a modified 
retrospective approach. IFRS 16 will be applied by us on Jan. 1, 2019. 

We are in the process of completing an initial scoping assessment for IFRS 16 and have prepared a detailed project plan. 
We anticipate that most of the effort under the implementation plan will occur in mid-to-late 2018. It is not yet possible 
to make reliable estimates of the potential impact of IFRS 16 on our financial statements and disclosures.  

M44
M44  TRANSALTA CORPORATION 

TransAlta Corporation    |    2017  Annual Integrated Report 
 
 
 
 
 
Management’s Discussion and Analysis

Demand and supply balances are the fundamental drivers of prices for electricity. Underlying economic growth is the main 
driver of longer-term changes in the demand for electricity,  whereas system capacity, natural gas prices, GHG pricing, 
Competitive Forces
government  subsidies,  and  renewable  resource  availability  are  key  drivers  of  the  supply.  Growth  in  behind-the-fence 
generation for mining investments is key to developing our Australian gas segment. 

Renewable capacity addition has been strong for the past several years due to government incentives. New supply in the 
near term and intermediate term is expected to come primarily from investment in renewable energy as well as natural-
gas-fired generation. This expectation is driven by the low prices in the natural gas market combined with public policies 
that favour carbon emission reductions.  

We have substantial merchant capacity in Alberta and the Pacific Northwest. In those regions, we enter into contracts 
and  business  relationships  with  commercial  and  industrial  customers  to  sell  power  on  a  long-term  basis,  up  to  our 
available capacity in the markets. We further reduce the portion of production not sold in advance through short-term 
physical and financial contracts, and we optimize production in real time against our position and market conditions. 

We also compete for long-term contracted opportunities in renewable and gas power generation, including cogeneration, 
across Canada, the United States, and Australia. Our target customers in this area are incumbent utility providers and 
large industrial and mining operators. 

Alberta 
Approximately  59  per  cent  of  our  gross  capacity  is 
located in Alberta and more than 64 per cent of this is 
subject  to  legislated  Alberta  PPAs,  which  were  put  in 
place in 2001 to facilitate the transition from regulated 
generation  to  the  current  energy  market  in  the 
province. The Sundance 1 and 2 Alberta PPA expired at 
the end of 2017 and the Keephills 1 and 2, Sundance 3 to 6, Sheerness, and Hydro PPAs will expire at the end of 2020. 
During the third quarter of 2017, we received formal notice from the Balancing Pool of the termination of the Sundance 
3 to 6 PPAs, effective March 31, 2018. In the fourth quarter of 2017, we announced our strategy of mothballing certain 
facilities  as  well  as  our  plan  to  convert  our  coal-fired  generation  to  gas-fired  generation.  See  the  Significant  and 
Subsequent  Events  section  of this  MD&A  for further  details.  Coal  generation  sold under  certain  Alberta  PPAs  retains 
some exposure to market prices as we pay penalties or receive payments for production below or above, respectively, 
targeted  availability  based  upon  a  rolling  30-day  average  of  spot  prices. We  can  also  retain  proceeds  from  the  sale  of 
energy and ancillary services in excess of obligations on our Hydro Alberta PPAs (“hydro peaking”). We enter into financial 
contracts to reduce our exposure to variable power prices for a significant portion of our remaining generation.  

Following the decrease in oil prices, Alberta’s annual demand decreased approximately 1 per cent from 2015 to 2016, but 
recovered in 2017, increasing by approximately 4 per cent.  The increase in demand was reflected in the average pool 
price, which increased from $18.28/MWh in 2016 to $22.19/MWh in 2017.  However, the pool price was still relatively 
low due to the oversupply of electricity in the market.  The softness in prices impacted merchant wind and hydro peaking, 
which are portions of our portfolio we cannot effectively hedge. 

Our  market  share  of  offer  control  in  Alberta  in  2017  was  approximately  12  per  cent.   After  the  termination  of  the 
Sundance 3 to 6 PPAs, our share of offer control is forecast to increase to approximately 22 per cent (16 per cent if the 
Sundance mothballed units are excluded from offer control). 

In late November 2016, we announced that we had entered into the OCA with the Government of Alberta that provides 
transition payments for the cessation of coal-fired emissions from the Keephills 3, Genesee 3 and Sheerness coal-fired 
plants on or before Dec. 31, 2030. The affected plants are not, however, precluded from generating electricity at any time 
by any method other than the combustion of coal.  We also entered into the MOU with the Government of Alberta to 
collaborate  and  co-operate  in  the  development  of  a  capacity  market  in  Alberta  that  ensures  both  current  and  new 
electricity generators  will have a level  economic playing  field to build, buy, and sell  electricity, and  to develop  a  policy 
framework to facilitate the conversion of coal-fired generation to gas-fired generation.  

TRANSALTA CORPORATION M45 
M45

TransAlta Corporation    |    2017  Annual Integrated Report 
 
 
 
 
 
 
Management’s Discussion and Analysis

We  expect  additional  compliance  costs  as  a  result  of  the  federal  government’s  proposed  framework  in  which  each 
province is expected to implement a GHG policy equivalent to a carbon price of $50 per tonne by 2022. We believe that 
our extensive portfolio of assets provides us with brownfield development opportunities in wind, solar, hydro, and gas that 
give us a cost advantage over competitors when constructing generation facilities that use these fuel types. 

In  March  and  May  2016,  the  buyers  under  the  legislated  Sundance,  Sheerness,  and  Keephills  PPAs  announced  their 
intention to terminate the PPAs and transfer their respective obligations under the PPAs to the Balancing Pool because 
of a change in Alberta law. Accordingly, the Balancing Pool began its investigation to determine whether these transfers 
are permitted by the terms of the PPAs in the current circumstances and, if so, when the transfers would become effective. 
On July 25, 2016, the Attorney General for the Province of Alberta commenced legal proceedings seeking relief against 
all buyers who purported to transfer their respective obligations under the PPAs, the owner of the Battle River #5 PPA, 
the AUC and the Balancing Pool. In this claim, the Attorney General challenged, among other things, the basis on which 
the  buyers  purported  to  terminate  the  PPAs  and  transfer  their  PPA  obligations  to  the  Balancing  Pool.   The  Attorney 
General subsequently settled with the Buyers of the Sundance PPAs and, in the fourth quarter of 2017, the Balancing Pool 
confirmed  the  termination  of  the  Keephills  PPA.   Accordingly,  the  Balancing  Pool  now  acts  as  the  buyer  under  the 
Sundance B, C, and Keephills PPAs.   

Pursuant to the Electric Utilities Act (Alberta), the Balancing Pool announced the complete termination of the Sundance 
PPAs,  effective  March  31,  2018.   As  of  April  1,  2018,  there  will  be  no  buyer  under  these  PPAs.   There  has  been  no 
announcement yet concerning the Keephills PPA. 

Notwithstanding all the above events, TransAlta continues to operate the PPA generating units in their ordinary course 
and receives the capacity and energy payments due to TransAlta under the PPAs. 

Coal-to-Gas Conversions 
On  Feb.  16,  2018,  Environment  and  Climate  Change  Canada  announced  draft  regulations  to  phase  out  coal-fired 
generation by 2030, as well as draft regulations for gas-fired electricity generation including provisions for the conversion 
of boiler units from coal-fired generation to natural gas-fired generation.  The draft regulations were published in Canada 
Gazette I on Feb. 17, 2018.  The rules for converted units will allow converted plants to operate for a set number of years 
following  the  end-of-life  for  the  unit  under  the  coal  regulations  based  on  a  one-time  performance  test  at  the  time  of 
conversion.  For our units, these rules will provide 5 to 10 additional years of operating life to each of our units, resulting 
in a cumulative life extension for our entire fleet of approximately 75 years, for a period of up to 15 years or until 2045, 
whichever comes first.  We will continue to engage with the Government of Canada as the regulations move from draft to 
final publication in Canada Gazette II.  

We are planning the conversion of Sundance Units 3 to 6 and Keephills Units 1 and 2 to gas-fired generation in the 2021 
to 2022 timeframe, thereby extending the useful lives of these units until the mid-2030s. We expect that the capacity of 
Sundance  Units  3  to  6  and  Keephills  1  and  2  will  not  change  following  conversion,  which  will  result  in  a  reduction  of 
approximately  40  per  cent  of  carbon  emissions  from  these  units  while  maintaining  approximately  2,400  MWs  in  the 
Alberta power grid. 

Our  total  capital  commitment  for  the  coal-to-gas  conversions  is  expected  to  be  approximately  $300  million,  mostly 
invested between 2021 to 2022. We anticipate funding the conversions with free cash flow at that time. These units are 
expected to provide low-cost capacity and to be competitive in the upcoming capacity market auctions. We expect the 
first auction to occur in 2019 for 2021 and that federal and provincial regulations will be adopted to facilitate coal-to-gas 
conversions. We continue to be engaged with government in the development  of the required regulatory regime. This 
year, we spent $1 million to advance engineering for the conversion, and in 2018 we expect to spend $4 million. 

M46
M46  TRANSALTA CORPORATION 

TransAlta Corporation    |    2017  Annual Integrated Report 
 
 
 
 
 
 
Management’s Discussion and Analysis

US Pacific Northwest 
Our capacity in the US Pacific Northwest is represented by our 
1,340  MW  Centralia  coal  plant.  Half  of  the  plant  capacity  is 
scheduled to retire at the end of 2020 and the other half at the 
end of 2025.  

System capacity in the region is primarily comprised of hydro and gas generation, with some wind additions over the last 
few years in response to government programs favouring renewable generation. Demand growth in the region has been 
limited  and  further  constrained  by  emphasis  on  energy  efficiency.  Our  coal  plant  can  effectively  compete  against  gas 
generation, although depressed gas prices following the expansion of shale gas production in North America have added 
to the downward pressure on power prices. 

Our competitiveness is enhanced by our long-term contract with Puget Sound Energy for up to 380 MW per year to 2024 
and up to 300 MW for 2025. The contract and our hedges allow us to satisfy power requirements from the market when 
prices fall below our marginal cost of production.  

We maintain an opportunity to redevelop Centralia as a gas plant after coal capacity retires, with permitting provided for 
in our agreement for coal transition established with the State of Washington in 2011. 

Contracted Gas and Renewables
The market for developing or acquiring gas and renewable generation facilities is highly competitive in all markets in which 
we operate. Our solid record as operator and developer supports our competitive position. We expect, where possible, to 
reduce our cost of capital and improve our competitive profile by using project financing and leveraging the lower cost of 
capital  with  TransAlta  Renewables.  In  the  United  States,  our  substantial  tax  attributes  further  increase  our 
competitiveness. 

While depressed commodity prices have reduced sectoral growth in the oil, gas, and mining industries, the change is also 
creating opportunities for us as a service provider as some of our potential customers are more carefully evaluating non-
core activities and driving for operational efficiencies. In renewables, we are primarily evaluating greenfield opportunities 
in Western Canada or acquisitions in other markets in which we have existing operations. We maintain highly qualified 
and experienced development teams to identify and develop these opportunities.  

Some of our older gas plants are now reaching the end of their original contract life. The plants generally have a substantial 
cost  advantage  over  new  builds  and  we  have  been  able  to  add  value  by  recontracting  these  plants  with  limited  life-
extending capital expenditures. We have recently extended the life of our Ottawa (2033 expiry), Windsor (2031 expiry), 
and  Parkeston  (2026  expiry)  plants  in  this  manner.  During  the  fourth  quarter  of  2017,  we  entered  into  a  long-term 
contract for our Fort Saskatchewan natural gas facility. We own a net 30 per cent of the facility. The contract has an initial 
10-year term, commencing on Jan. 1, 2020, with an option for two five-year extensions. The contract allows our customer 
to continue to benefit from the operational flexibility of the plant. The current contract expires on Dec. 31, 2019. During 
the fourth quarter of 2016, we entered into a new contract with the IESO for our Mississauga cogeneration facility. The 
new  contract  took  effect  on  Jan.  1,  2017,  and  resulted  in  the  termination  of  the  existing  contract,  which  would  have 
otherwise terminated in December 2018. The new contract provides us with additional financial flexibility to pay down 
upcoming debt maturities.  

M47
TRANSALTA CORPORATION M47 

TransAlta Corporation    |    2017  Annual Integrated Report 
 
 
 
 
 
 
Management’s Discussion and Analysis

The following discusses TransAlta’s main categories of capital, being Financial, Power Generating Portfolio, Human and 
Intellectual, Social and Relationship, and Natural. 
TransAlta’s Capital 

Our goal over the last three years was to build financial flexibility by using multiple sources of funding to reposition our 
Financial Capital 
capital  structure.  Over  the  last  few  years,  the  rating  of  our  unsecured  debt  was  put  under  pressure  by  certain  rating 
agencies. We responded to this pressure by taking significant action starting in 2014 to reduce our indebtedness and 
strengthen our financial metrics.  

Moody’s lowered the rating of our senior unsecured debt to Ba1 with  a stable outlook in  December 2015. The direct 
financial impact of this downgrade has been limited. During 2017, Fitch Ratings reaffirmed our Unsecured Debt rating 
and  Issuer  Rating  of  BBB-  and  changed  its  outlook  from  negative  to  stable,  DBRS  Limited  changed  the  Corporation’s 
Unsecured Debt rating and Medium-Term Notes rating from BBB to BBB (low), the Preferred Shares rating from Pfd-3 to 
Pfd-3 (low), and Issuer Rating BBB to BBB (low) (changed to stable from negative), and Standard and Poor’s reaffirmed 
our Unsecured Debt rating and Issuer Rating of BBB- but changed the outlook from stable to negative. We remain focused 
on maintaining these ratings, as strengthening our financial position allows our commercial team to contract our portfolio 
with a variety of counterparties on terms and prices that are favourable to our financial results and provides us with better 
access to capital markets through commodity and credit cycles. Risks associated with further reductions in our credit 
ratings are discussed in the Liquidity Risk section of this MD&A. 

M48
M48  TRANSALTA CORPORATION 

TransAlta Corporation    |    2017  Annual Integrated Report 
 
 
 
 
 
Management’s Discussion and Analysis

Capital Structure
Our capital structure consists of the following components as shown below: 
1 

2017

As at Dec. 31

TransAlta Corporation

   Recourse debt - CAD debentures

   Recourse debt - US senior notes 

   Credit facilities

   US tax equity financing

   Other

$

1,046

1,499

-

31

13

%

14

19

-

-

-

2016

$

1,045

2,151

-

39

15

Less: cash and cash equivalents

(294)

(4)

(290)

Less: fair value asset of economic hedging 
  instruments on debt(1)

   Net recourse debt

   Non-recourse debt

   Finance lease obligations

Total net debt - TransAlta Corporation

TransAlta Renewables

   Credit facility

Less: cash and cash equivalents

   Net recourse debt

   Non-recourse debt

Total net debt - TransAlta Renewables

Total consolidated net debt 

Non-controlling interests

Equity attributable to shareholders

   Common shares

   Preferred shares

   Contributed surplus, deficit, and 
      accumulated other comprehensive income

Total capital

(30)

2,265

208

69

2,542

27

(20)

7

814

821

3,363

1,059

3,094

942

(710)

7,748

-

29

3

1

33

-

-

-

11

11

44

14

40

12

(9)

100

(163)

2,797

245

73

3,115

-

(15)

(15)

793

778

3,893

1,152

3,094

942

(525)

8,556

%

12

25

-

-

-

(3)

(2)

32

3

1

36

-

-

-

9

9

45

14

36

11

(6)

100

2015

$

1,044

2,221

315

50

17

(52)

(190)

3,405

55

82

3,542

-

(2)

(2)

711

709

4,251

1,029

3,075

942

(656)

8,641

%

12

26

4

-

-

-

(2)

39

-

1

40

-

-

-

8

8

48

13

36

11

(8)

100

We continued down our path of strengthening our financial position during 2017 and have reduced our total consolidated 
net debt by almost $900 million since the end of 2015. In the second quarter of 2017, we made a scheduled US$400 
million  U.S.  Senior  Note  repayment  using  existing  liquidity.  This  repayment  was  hedged  with  a  cross-currency  swap 
entered  into  on  issuance  of  the  debt  that  effectively  reduced  our  Canadian  dollar  repayment  by  approximately  $107 
million. On Oct. 2, 2017, we closed a $260 million bond offering secured by our Kent Hills Wind Farms,  and used $197 
million  of  the  proceeds  to  early  redeem  all  of  CHD’s  outstanding  non-recourse  debentures.  In  February  2018,  we 
announced  the  early  redemption  of  US$500  million  of  our  Senior  Notes  due  in  May  2018.  See  the  Significant  and 
Subsequent Events section of this MD&A for further details.  

Throughout 2016 and 2017, we continued implementing our strategy to raise debt secured by our contracted cash flows and 
completed the following debt offerings:  
▪  a  project-level  bond  in  the  amount  of  $260  million,  with  principal  and  interest  payable  quarterly,  maturing  on  

Nov. 30, 2033, secured by our Kent Hills Wind Farms;  

▪  a  non-recourse  bond  in  the  amount  of  $202.5  million,  with  principal  and  interest  payable  quarterly,  maturing  on  

(1)  During  the  first  quarter  of  2017,  we  discontinued  hedge  accounting  on  certain  US-denominated  debt  hedges.  The  foreign  currency  derivatives  remain  in  place  as 

economic hedges. See the Financial Instruments section of this MD&A for further details.   

TRANSALTA CORPORATION M49 

M49

TransAlta Corporation    |    2017  Annual Integrated Report              
         
              
              
              
                   
              
              
              
                   
              
                   
                         
                  
                          
                        
                  
                      
                     
                  
                     
                        
                     
                        
                     
                  
                     
                        
                     
                        
                 
                
                 
                     
                    
                        
                    
                  
                 
                     
                 
                     
              
              
              
                   
              
                   
                  
                 
                  
                      
                     
                        
                     
                 
                     
                      
                     
                      
              
              
              
                   
              
                   
                     
                  
                          
                        
                          
                        
                    
                  
                    
                        
                       
                        
                        
                  
                    
                        
                       
                        
                  
              
                  
                      
                  
                      
                  
              
                  
                      
                  
                      
              
              
              
                   
              
                   
              
              
              
                   
              
                   
              
              
              
                   
              
                   
                  
              
                  
                   
                  
                   
                 
                
                 
                     
                 
                     
              
           
              
                
              
                
 
 
 
                                                 
Management’s Discussion and Analysis

Dec. 31, 2030, secured by our Poplar Creek finance lease contract; and 

▪  a non-recourse bond in the amount of $159 million, with principal and interest payable semi-annually, and maturing 

on June 30, 2032, secured by our New Richmond Wind project in Quebec. 

These  actions  align  with  our  strategy  of  issuing  project-level  amortizing  debt  to  proactively  manage  upcoming  debt 
maturities.  

During  2019  to  2020,  we  have  approximately  $941  million  of  debt  maturing.  We  expect  to  refinance  some  of  these 
upcoming debt maturities by raising $300 to $400 million of debt secured by our contracted cash flows. We also expect 
to continue our deleveraging strategy as a significant part of our free cash flow over the three years will be allocated to 
debt reduction.  

During 2017, we received US$325 million ($417 million) from FMG for the sale of the Solomon Power Station and expect 
$215 million on March 31, 2018, relating to the Sundance Unit 3 to 6 PPA terminations from the Balancing Pool. On Feb. 
2, 2018, we announced our intent to use our existing liquidity to early repay a US$500 million U.S. Senior Note maturing 
in May 2018. For further details see the Significant and Subsequent Events section of this MD&A. These events provide 
us more financial flexibility in executing our deleveraging plan. 

On Jan. 18, 2017, we renewed a US base shelf prospectus that allows for the issuance of up to $2.0 billion aggregate principal 
amount (or its equivalent in other currencies) of common shares, first preferred shares, warrants, subscription receipts and 
debt securities from time to time. We also have a Canadian base shelf prospectus, which allows for the issuance of common 
shares, first preferred shares, warrants, subscription receipts and debt securities from time to time. The specific terms of 
any offering of securities is to be determined at the date of issue.  

On March 1, 2018, we announced our intention to seek Toronto Stock Exchange acceptance of a NCIB. See the Significant 
and Subsequent Events section of this MD&A for further details. 

The weakening of the US dollar has decreased our long-term debt balances by $113 million in 2017. Almost all our U.S.-
denominated debt is hedged(1) either through financial contracts or net investments in our U.S. operations. During the 
year, these changes in our US-denominated debt were offset as follows: 

As at Dec. 31

Effects of foreign exchange on carrying amounts of US operations 
  (net investment hedge) and finance lease receivable
Foreign currency economic cash flow hedges on debt(1)

Economic hedges and other

Total

2017

2016

(61)

(45)

(7)

(113)

(35)

(29)

(3)

(67)

Our credit facilities provide us with significant liquidity. On July 24, 2017, TransAlta Renewables entered into a $500 million 
syndicated credit agreement. At the same time, we agreed to reduce our facility by the same amount so that consolidated 
syndicated credit facilities remained constant at $1.5 billon. As a result, at Dec. 31, 2017, we maintained our total of $2.0 
billion  (Dec.  31,  2016  -  $2.0  billion)  of  committed  credit  facilities.  We  are  in  compliance  with  the  terms  of  the  credit 
facilities.  In  total,  $1.4  billion  (Dec.  31,  2016  -  $1.4  billion)  was  available  for  use.  At  Dec.  31,  2017,  the  
$0.6 billion (Dec. 31, 2016 - $0.6 billion) of credit utilized under these facilities was comprised of actual drawings of nil 
(Dec. 31, 2016 - nil) and letters of credit of $0.6 billion (Dec. 31, 2016 - $0.6 billion). These facilities are comprised of a $1 
billion committed syndicated bank facility expiring in 2021, a $500 million committed syndicated bank facility expiring in 
2021 at TransAlta Renewables, one bilateral credit facility of US$200 million expiring in 2020, and three bilateral credit 
facilities totalling $240 million, expiring in 2019.  

(1)  During  the  first  quarter  of  2017,  we  discontinued  hedge  accounting  on  certain  US-denominated  debt  hedges.  The  foreign  currency  derivatives  remain  in  place  as 

economic hedges. See the Financial Instruments section of this MD&A for further details.   

M50
M50  TRANSALTA CORPORATION 

TransAlta Corporation    |    2017  Annual Integrated Report 
 
 
 
 
 
 
  
                                             
                           
                                             
                           
                                                
                              
                                          
                           
 
 
 
                                                 
Management’s Discussion and Analysis

The Melancthon Wolfe Wind, Pingston, TAPC Holdings LP, New Richmond, KHWLP, and Mass Solar non-recourse bonds 
of $1,021 million (Dec. 31, 2016 - $845 million) are subject to customary financing conditions and covenants that may 
restrict the Corporation’s ability to access funds generated by the facilities’ operations. Upon meeting certain distribution 
tests,  typically  performed  once  per  quarter,  the  funds  are  able  to  be  distributed  by  the  subsidiary  entities  to  their 
respective parent entity. These conditions include meeting a debt service coverage ratio prior to distribution, which was 
met by these entities in the fourth quarter. However, funds in these entities that have accumulated since the third quarter 
test will remain there until the next debt service coverage ratio can be calculated in the first quarter of 2018. At Dec. 31, 
2017, $35 million (Dec. 31, 2016 -$24 million) of cash was subject to these financial restrictions. In addition, we have $30 
million of proceeds from the KHWLP project financing that are being held in a construction reserve account, which will 
be released upon certain conditions, including commissioning, being met.  

Additionally, certain non-recourse bonds require that certain reserve accounts be established and funded through cash 
held on deposit and/or by providing letters of credit. The Corporation has elected to use letters of credit as at Dec. 31, 
2017. However, as at Dec. 31, 2017, $1 million of cash was on deposit for certain reserve accounts that do not allow the 
use of letters of credit and was not available for general use.  

Working Capital 
Including the current portion of long-term debt, the excess of current assets over current liabilities was $101 million as at 
Dec. 31, 2017 (2016 - $337 million), a decrease of $226 million. Our working capital decreased year-over-year due to 
higher current income taxes payable as a result of the sale of the Solomon Power Station and the increase in long-term 
debt due within the next year (this year, we have a US$500 million senior note due; whereas last year, a US$400 million 
senior note was due). Last year, working capital included $61 million of assets classified as held for sale related to the 
Wintering Hills wind facility. Excluding the current portion of long-term debt of $747 million, the excess of current assets 
over liabilities was $848 million as at Dec. 31, 2017 (2016 - $976 million), a decrease of $128 million, mainly due to the 
higher 2017 current income taxes payable and the $61 million of assets related to  Wintering Hills in  2016’s working 
capital.  

Share Capital 
Our Series A Cumulative Fixed Redeemable Rate Reset Preferred Shares reset in 2016 at a coupon rate of 2.709 per cent. 
As  permitted  under  the  terms  of  the  Preferred  Shares,  some  shareholders  elected  to  convert  to  a  floating  rate  and 
1,824,620  of  our  12  million  Series  A  Cumulative  Fixed  Redeemable  Rate  Reset  Preferred  Shares  were  tendered  for 
conversion, on a one-for-one basis, into the Series B Cumulative Redeemable Floating Rate Preferred Shares. Our Series 
C and Series E Cumulative Redeemable Rate Reset Preferred Shares failed to receive the required number of minimum 
votes in 2017 to give effect to conversions into Series D and  Series F; respectively, accordingly, both the Series C and 
Series E Preferred Shares will be entitled to receive quarterly fixed cumulative preferential cash dividends, if, as and when 
declared by the Board.  The Series G preferred shares will reset in 2019. 

The following table outlines the common and preferred shares issued and outstanding:  

As at 

March 1, 2018

Dec. 31, 2017

Dec. 31, 2016

Number of shares (millions)

Common shares issued and outstanding, end of period

287.9

287.9

287.9

Preferred shares 

  Series A

  Series B

  Series C

  Series E

  Series G

Preferred shares issued and outstanding, end of period

10.2

1.8

11.0

9.0

6.6

38.6

10.2

1.8

11.0

9.0

6.6

38.6

10.2

1.8

11.0

9.0

6.6

38.6

M51
TRANSALTA CORPORATION M51 

TransAlta Corporation    |    2017  Annual Integrated Report 
 
 
 
Management’s Discussion and Analysis

Non-Controlling Interests 
As of Dec. 31, 2017, we own 64.0 per cent (2016 – 64.0 per cent) of TransAlta Renewables. The South Hedland Power 
Station achieved commercial operation on July 28, 2017. On Aug. 1, 2017, the Corporation converted its 26.1 million Class 
B  shares  held  in  TransAlta  Renewables  into  26.4  million  common  shares  of  TransAlta  Renewables.  At  that  time,  the 
Corporation’s common share equity participation percentage in TransAlta Renewables increased to 64 per cent from 59.8 
per cent.  The stable and predictable cash flows generated by TransAlta Renewables’  assets have attracted favourable 
equity valuations from investors, allowing TransAlta the potential to raise equity capital. 

In  January  2016,  we  completed  the  sale  to  TransAlta  Renewables  of  an  economic  interest  in  the  506  MW  Sarnia 
cogeneration facility and of two renewable energy facilities with total capacity of 105 MW for $540 million. Consideration 
received from TransAlta Renewables consisted of gross proceeds from a public offering of 17,692,750 common shares at 
$9.75 per share for gross proceeds of $173 million, 15.6 million common shares of TransAlta Renewables with a value of 
$152  million,  and  a  $215  million  unsecured  subordinated  debenture  convertible  into  common  shares  of  TransAlta 
Renewables  at  a  price  of  $13.16  per  common  share  upon  maturity  on  Dec  31,  2020.  On  Nov.  9,  2017,  TransAlta 
Renewables  paid  the  debentures  early,  for  $218  million  in  total,  comprised  of  principal  of  $215  million  and  accrued 
interest  of  $3  million.  In  November  2016,  the  economic  interest  was  converted  to  direct  ownership  of  the  Canadian 
Assets by TransAlta Renewables.   

TransAlta  Renewables  is  a  publicly  traded  company  whose  common  shares  are  listed  on  the  Toronto  Stock  Exchange 
under  the  symbol  “RNW”.  TransAlta  Renewables  holds  a  diversified,  highly  contracted  portfolio  of  assets  with 
comparatively  lower  carbon  intensity.  The  stable  and  predictable  cash  flows  generated  by  these  assets  has  attracted 
favourable equity valuations from investors, allowing TransAlta to raise equity capital. 

We remain committed to maintaining our position as the majority shareholder and sponsor of TransAlta Renewables, with 
a stated goal of maintaining our interest between 60 to 80 per cent. 

We also own 50.01 per cent of TransAlta Cogeneration L.P (“TA Cogen”), which owns, operates, or has an interest in three 
natural-gas-fired facilities and one coal-fired generating facility. In 2016, we recontracted our Mississauga cogeneration, 
which resulted in a pre-tax gain of approximately $191 million, accelerated depreciation of $46 million, and recognized a 
fuel charge for the de-designation of gas hedges of $14 million. The Mississauga, Ottawa, Windsor, and Fort Saskatchewan 
facilities are owned through our 50.01 per cent interest in TA Cogen. Since we own a controlling interest in TA Cogen and 
TransAlta Renewables, we consolidate the entire earnings, assets, and liabilities in relation to those assets.  

Returns to Providers of Capital 
Net Interest Expense 
The components of net interest expense are shown below: 

Year ended Dec. 31

Interest on debt

Interest income

Loss on redemption of bonds

Capitalized interest

Interest on finance lease obligations

Credit facility fees, bank charges, and other interest

Keephills 1 outage interest accruals (reversals)

Other

Accretion of provisions

Net interest expense

2017

218

(7)

6

(9)

3

18

-

(3)

21

247

2016

218

2015

218

(2)

1

(16)

3

19

(10)

(4)

20

229

(2)

-

(9)

4

10

9

-

21

251

In 2017, we refined our categorization of interest on debt, mainly to report separately credit facility fees. Prior periods 
have been revised accordingly. 

M52
M52  TRANSALTA CORPORATION 

TransAlta Corporation    |    2017  Annual Integrated Report 
 
 
 
 
 
 
                  
                     
                 
                       
                         
                      
                        
                           
                         
                       
                      
                      
                        
                           
                       
                     
                        
                    
                         
                      
                       
                       
                         
                         
                     
                        
                    
                  
                     
                 
 
Management’s Discussion and Analysis

Net interest expense increased during 2017 compared to 2016, due to  lower capitalized interest and the redemption 
premium recognized on the early redemption of the CHD debentures, which more than offset higher interest income. 
During  2016,  reversals  of  interest  previously  accrued  relating  to  our  Keephills  1  outage  arbitration  reduced  interest 
expense.   

Net interest expense decreased in 2016 compared to 2015, primarily as a result of higher capitalized interest relating to 
the South Hedland Power Station and the reversal of the accrued interest component of the Keephills 1 provision. See the 
Other Consolidated Analysis section of this MD&A for further details. These decreases were partially offset by higher 
credit facility fees, bank charges, and other interest. 

Dividends to Shareholders 
On Jan. 14, 2016, we announced a reduction of our common share dividend from $0.72 annually to $0.16 annually. This 
action was taken as part of a  plan to  improve our long-term  financial flexibility. The declaration of dividends is at the 
discretion of the Board. 

The following are the 2017 common and preferred shares dividends declared each quarter: 

Declaration date

April 19, 2017

July 18, 2017

Oct. 30, 2017

Common 
dividends 
per share 
0.04

0.04

0.04

Preferred Series dividends per share

A
0.16931

0.16931

0.16931

B
0.15645

0.16125

0.17467

C
0.28750

0.25169

0.25169

E
0.31250

0.31250

0.32463

G
0.33125

0.33125

0.33125

During the year ended Dec. 31, 2016, 3.9 million common shares were issued to shareholders that elected  to reinvest 
their  dividends,  for  a  total  of  $18  million.  On  Jan.  14,  2016,  we  suspended  the  Premium  DividendTM,  Dividend 
Reinvestment and Optional Common Share Purchase Plan. 

On Feb. 2, 2018, the Corporation declared a quarterly dividend of $0.04 per common share, payable on April 1, 2018. The 
Corporation also declared a quarterly dividend of $0.16931 on the Series A preferred shares, $0.17889 on the Series B 
preferred shares, $0.25169 on the Series C preferred shares, $0.32463 on the Series E preferred shares, and $0.33125 
on the Series G preferred shares, all payable on March 31, 2018. 

Non-Controlling Interests 
Reported earnings attributable to non-controlling interests for the year ended Dec. 31, 2017, decreased by $65 million 
compared to 2016. Net earnings were negatively impacted by the impairment of TransAlta Renewables’ investment in the 
Australian  business  recognized  as  a  result  of  the  sale  of  the  Solomon  Power  Station  to  FMG    and  the  purported 
termination  of  its  South  Hedland  PPA  and  by  higher  net  interest  expense  due  to  higher  outstanding  borrowings.  The 
Mississauga recontracting has also impacted net earnings, as we recognized a $191 million gain in 2016’s results.  

Reported net earnings attributable to non-controlling interests for the year ended Dec. 31, 2016, increased $13 million 
to  $107  million  compared  to  2015,  primarily  due  to  the  public  offering  of  additional  common  shares  by  TransAlta 
Renewables  to  finance  its  investments  in  the  Australian  and  Canadian  portfolios  in  May  2015  and  January  2016, 
respectively. Included in net earnings for 2016 was recognition of the non-controlling interests of $191 million gain due 
to the Mississauga recontracting. 

M53
TRANSALTA CORPORATION M53 

TransAlta Corporation    |    2017  Annual Integrated Report 
 
 
 
 
 
 
 
 
Management’s Discussion and Analysis

Power Generating Portfolio  
We  monitor  availability  closely  as  a  key  metric  to  achieving  our  financial  targets.  We  adjust  our  maintenance  and 
sustaining  capital  expenditures  to  optimize  financial  returns  on  our  investments  and  to  align  with  our  strategic 
orientations. 

Availability and Production 
Our adjusted availability target was 86 to 88 per cent 
for 2017.  

Our  availability  in  2017,  after  adjusting  for  economic 
dispatching  at  US  Coal,  was  86.8  per  cent  
(2016 – 89.2 per cent, 2015 – 89.0 per cent) and was 
lower compared to last year. The main causes of the decrease were higher outages and derates at Canadian Coal, planned 
maintenance at our Sarnia facility, and the change at Windsor to a peaking facility. Windsor’s base to cycling conversion 
project also impacted the year-to-date availability. Lower availability had a minimal impact on our results due to current 
low prices in Alberta, the Pacific Northwest, and Ontario. 

Production for the year ended Dec. 31, 2017, decreased 
1,257  GWh  compared  to  2016.  The  cessation  of 
operations at our Mississauga gas plant effective Jan. 
1,  2017, and  higher outages and derates at Canadian 
Coal were the main drivers of the production decrease 
during  the  year.  This  was  partially  offset  by  higher 
generation  from  Australia  due  to  the  commissioning  of  South  Hedland  and  stronger  customer  demand.  U.S.  Coal  had 
higher production compared to 2016 as a result of lower economic dispatching in the first quarter of 2017 due to slightly 
higher prices. Higher water resources at Hydro also contributed to higher production in 2017.  In accordance with the 
terms of Mississauga’s new contract with Ontario’s IESO, we will continue to receive monthly capacity payments from the 
IESO until Dec. 31, 2018.  

Operational 
In the generation segments, our OM&A costs reflect the cost of operating our facilities. These costs can fluctuate due to 
the timing and nature of planned and unplanned maintenance activities. In 2017, we initiated Project Greenlight across 
the entire organization with the intent to deliver committed improvements across the Corporation, including increased 
generation efficiency, lower cost and improved heat rates. Since 2015, we have reduced our OM&A generation costs by 
approximately 7 per cent from $418 million to $383 million.  

The following table outlines our generation comparable OM&A over the last three years: 

Year ended Dec. 31

Generation comparable OM&A 

Greenlight transformation costs included in OM&A

  Canadian Coal

  US Coal

  Gas, Wind and Solar, and Hydro

Adjusted generation comparable OM&A

2017

412

(20)

(2)

(7)

383

2016

396

2015

418

-

-

-

-

-

-

396

418

M54
M54  TRANSALTA CORPORATION 

TransAlta Corporation    |    2017  Annual Integrated Report 
 
 
 
 
 
 
 
                            
                            
                            
                              
                                    
                                    
                                 
                                    
                                    
                                 
                                    
                                    
                            
                            
                            
 
 
Management’s Discussion and Analysis

Sustaining Capital 
We are in a long-cycle, capital-intensive business that requires significant capital expenditures. Our goal is to undertake 
sustaining capital that ensures our facilities operate reliably and safely over a long period of time. Sustaining capital also 
includes capital required following the 2013 flood in Alberta, most of which has been recovered from third parties. 

Year ended Dec. 31

Routine capital

Mine capital

Planned major maintenance

Finance leases

Total sustaining capital expenditures

Productivity capital

Flood-recovery capital

Total sustaining, productivity, and flood recovery capital expenditures

Insurance recoveries of sustaining capital expenditures

Net amount

Lost production as a result of planned major maintenance is as follows: 
1 

2017

2016

2015

69

28

121

17

235

24

-

259

-

259

83

23

148

16

270

8

2

280

(1)

279

101

25

162

13

301

6

4

311

(25)

286

Year ended Dec. 31
GWh lost(1)

2017

1,234

2016

938

2015

1,409

Total net sustaining and productivity capital expenditures were $20 million lower compared to 2016. While we decreased 
our target for sustaining capital for the year, we  increased the productivity capital expected spend for 2017, as these 
expenditures  relate  to  the  funding  of  some  Project  Greenlight  transformation  initiatives.  In  certain  cases,  payback  is 
expected to be achieved within two years. We completed planned major outages at Sundance Units 5 and 6, Keephills Unit 
2, Keephills Unit 3, Sheerness Unit 1, Centralia Unit 2, Sarnia, and Windsor, and we completed an overhaul to one of our 
draglines at our Highvale mine.  

Strategic Growth and Corporate Transformation  

Acquisition of Two U.S. Wind Projects 
On  Feb.  20,  2018,  TransAlta  Renewables  announced  that  it  had  entered  into  an  arrangement  to  acquire  two  wind 
construction-ready projects in the United States. See the Significant and Subsequent Events section of this MD&A for 
further details. 

South Hedland Power Station and Conversion of Class B Shares 
Our South Hedland Power Station achieved commercial operation on July 28, 2017. On Aug. 1, 2017, we converted our 
26.1 million Class B shares held in TransAlta Renewables into 26.4 million common shares of TransAlta Renewables. At 
that time, our common share equity participation percentage in TransAlta Renewables increased to 64 per cent from 59.8 
per cent. The Class B shares were converted at a ratio greater than 1:1 because the construction and commissioning costs 
for  the  project  were  below  the  referenced  costs  agreed  to  with  TransAlta  Renewables.  TransAlta  Renewables  also 
announced an increase in its monthly dividend rate of approximately 7 per cent. 

On  Aug.  1,  2017,  FMG  notified  TransAlta  that  in  its  view  the  South  Hedland  Power  Station  has  not  yet  satisfied  the 
requisite performance criteria under the South Hedland PPA between FMG and TransAlta. In our view, all conditions to 
establish commercial operations have been fully satisfied under the terms of the PPA with FMG and TransAlta. Horizon 
Power, the local utility and pricing offtaker, has not disputed commercial operation. On Nov. 13, 2017, FMG issued a notice 
of termination of the PPA.  

(1)  Lost production excludes periods of planned major maintenance at US Coal, which occur during periods of economic dispatching. 

TRANSALTA CORPORATION M55 
M55

TransAlta Corporation    |    2017  Annual Integrated Report 
                               
                               
                            
                               
                               
                               
                            
                            
                            
                               
                               
                               
                            
                            
                            
                               
                                  
                                  
                                   
                                  
                                  
                            
                            
                            
                                   
                                
                             
                            
                            
                            
 
 
                        
                            
                        
 
 
 
 
 
                                                 
Management’s Discussion and Analysis

Our view is that the contract termination is invalid and, as such, we have continued to invoice FMG for monthly capacity. 
On Dec. 4, 2017, we commenced proceedings in the Supreme Court of Western Australia to recover amounts invoiced 
under the PPA to FMG. 

Kent Hills Wind Project 
During  the  second  quarter,  TransAlta  Renewables  entered  into  a  long-term  contract  with  the  New  Brunswick  Power 
Corporation (“NB Power”) for the sale of all power generated by an additional 17.25 MW of capacity from the Kent Hills 
wind project. At the same time, the term of the Kent Hills 1 contract with NB Power was extended from 2033 to 2035, 
matching the life of the Kent Hills 2 and Kent Hills 3 wind projects. 

The additional 17.25 MW at Kent Hills is an expansion of our existing Kent Hills wind farms, increasing the total operating 
capacity of the Kent Hills wind farms to approximately 167 MW. We expect to begin the construction phase in the spring 
of 2018. 

On Oct. 2, 2017, TransAlta Renewables’ indirect majority-owned subsidiary, KHWLP, closed an approximate $260 million 
bond offering, by way of a private placement, which is secured by, among other things, a first ranking charge over all assets 
of KHWLP. The bonds are amortizing and bear interest at an annual rate of 4.454 per cent, payable quarterly, and mature 
on Nov. 30, 2033. The proceeds from the financing were used to early repay maturing debt and to fund the expansion of 
the project, net of $30 million held in a construction reserve account with the remainder, being distributed to the partners 
in the Kent Hills wind project.  

Brazeau Hydro Pumped Storage 
The Brazeau Hydro Pumped Storage project is an innovative way to generate and shape clean electricity. It will store water 
that can be used to both generate power when it is needed and store excess power supply when demand is low. When 
there is excess renewable generation in periods of low demand, water will be pumped from the lower reservoir and stored 
in the upper reservoir to be used later. When demand is high and generation from other renewables generation is not 
sufficient, water will flow back through a turbine using gravity to generate clean electricity. The Brazeau Hydro Pumped 
Storage project is a focus for us, as it has existing infrastructure that reduces the cost and environmental footprint of the 
project,  is situated close to existing transmission infrastructure,  and  allows for increased  renewables development by 
balancing intermittent generation from wind and solar.  

We are currently working to secure a path that will advance our investment in the project and secure a long-term contract 
for the project. The Brazeau Hydro Pumped Storage project is expected to have new capacity ranging between 600 MW 
to 900 MW, bringing the total Brazeau facility to 955 to 1,255 MW, post-completion. We estimate an investment in the 
range of $1.8 billion to $2.5 billion and expect construction to begin upon receipt of a long-term contract and regulatory 
approvals, between 2020 and 2021, with operations to commence in 2025. In 2017, we invested approximately $6 million 
to advance the environmental study, work with stakeholders and execute geotechnical work to help further our design 
and construction phase. 

Other Growth Projects
We are advancing our plans to build, own and operate the following growth projects: 
▪  The  Antelope  Coulee  Wind  project  -  a  wind  project  located  in  southwest  Saskatchewan,  comprised  of  up  to  55 
turbines, with a total capacity of between 100 MW to 200 MW, depending on the approved size of the project. If 
successful, construction could begin in 2020 with a proposed commercial operation date of no later than September 
2021. If built, the project is expected to produce up to 800,000 MWh of electricity annually, enough to power over 
80,000 homes. 

▪  The Garden Plain Wind project – a wind project located near Drumheller, Alberta, comprised of 36 turbines, with a 
total capacity of approximately 130 MW. We are in the late stages of finalizing the project design and are preparing 
to submit an application to the AUC for construction and permitting approval, which is expected in March 2018. If 
built, the project is expected to produce 455,000 MWh of electricity annually, enough to power around 50,000 homes. 

M56
M56  TRANSALTA CORPORATION 

TransAlta Corporation    |    2017  Annual Integrated Report 
 
 
 
 
 
Management’s Discussion and Analysis

▪  The New Colony Wind Farm - a greenfield wind project located in Martinsdale, Montana, comprised of 7 turbines, 
with a total capacity of approximately 23.1 MW. The project is in late stages of development and if built, the project is 
expected to produce 75,000 MWh of energy annually.  
 Goonumbla  Solar  Project  –  a  solar  project  located  in  New  South  Wales,  roughly  350  kilometres  from  Sydney, 
consisting  of  photovoltaic  solar  panels  with  a  total  capacity  of  70  MW.  The  project  is  permitted  and  has  an 
interconnection agreement in  place with  a transmission operator.  An experienced  engineering,  procurement,  and 
construction contractor has been selected.   

▪ 

In 2015 we completed two transactions and acquired: 
▪  71 MW of fully contracted renewable generation assets for cash consideration of US$76 million together with the 
assumption of certain  tax  equity obligations and US$42 million of non-recourse debt.  The assets acquired  include  
21 MW of solar projects located in Massachusetts and the 50 MW Lakeswind wind project located in Minnesota. The 
assets are contracted under long-term PPAs ranging from 20 to 30 years.  

▪  As part of the restructuring of our Poplar Creek contract, we acquired the 20 MW Kent Breeze wind facility located 
in Ontario, which has a 20-year contract with the Ontario IESO and a 51 per cent interest in an 88 MW non-contracted 
wind facility in Alberta. Our interest in the Alberta wind facility was sold in early 2017. 

During 2015, we received approval from the AUC to construct and operate an 856 MW combined-cycle natural-gas-fired 
power plant in Alberta. The Sundance 7 project has received all regulatory approvals after receiving the  Environmental 
Protection and Enhancement Act approval from Alberta Environment and Parks on Oct. 1, 2015. Construction of Sundance 
7 will not commence until we have contracted a significant portion of the plant capacity.  Following changes to market 
conditions in Alberta during the last few years, we do not anticipate that this condition will be met before the beginning 
of  the  next  decade.  In  December  2015,  we  repurchased  our  partner’s  50  per  cent  share  in  TAMA  Power,  the  jointly 
controlled entity developing this project, for consideration of $10 million payable over five years, along with an option 
permitting the partner to buy back into this project or into other projects of TAMA Power during this period.  

Project Greenlight 
Our transformation project is  a top priority for us.  Driven by  engagement from all employees,  the intent is to deliver 
ambitious improvements in every part of the Corporation. Initiatives include increasing revenue, improving generation, 
reducing operating and maintenance costs, reducing overhead costs and financing costs, and optimizing our capital spend. 
We expect Project Greenlight to deliver sustainable pre-tax savings of approximately $50 million to $70 million annually, 
commencing in 2018. We are on track to achieve our expected annual savings targets. In 2017, the cost of the program 
was largely offset by the cost reductions and productivity gains. We expect to invest a further $10 million to $20 million 
on this program in 2018. We also expect to spend $20 million to $30 million related to productivity capital in 2018. 

Contractual Profile 
Approximately 65 per cent of our capacity over the next two years is sold under long-term contracts. Excluding Alberta 
PPAs for our coal and hydro facilities, the majority of these contracts have maturities in excess of 10 years. During the 
fourth quarter of 2017, we entered into a long-term contract for the Fort Saskatchewan natural gas facility, commencing 
Jan. 1, 2020. The contract has an initial 10-year term. In 2016, we entered into a long-term contract for the Akolkolex 
hydro facility in B.C., expiring in 2045. Our South Hedland Power Station reached commercial operations on July 28, 2017, 
and is expected to add stable contracted cash flows until the end of its 25-year contract life. In 2015, significant contracts 
were extended at our Poplar Creek, Windsor, and Parkeston facilities, as discussed in more detail below. The average life 
of these contracts is approximately 19 years. 

M57
TRANSALTA CORPORATION M57 

TransAlta Corporation    |    2017  Annual Integrated Report 
 
 
Management’s Discussion and Analysis

Poplar Creek
In late 2015, we closed the restructuring of our contractual arrangement for power generation services with Suncor at 
Suncor’s oil sands base site near Fort McMurray and the acquisition of Suncor’s interest in two wind projects located in 
Alberta and Ontario. 

The Poplar Creek cogeneration facility had been built and contracted to provide steam and electricity to Suncor until 
2023. Under the terms of the new arrangement, Suncor acquired from TransAlta two steam turbines with an installed 
capacity of 132 MW and certain transmission interconnection assets. In addition, Suncor assumed full operational control 
of the cogeneration facility, including responsibility for all capital costs and the right to use the full 244 MW capacity of 
TransAlta’s gas generators until Dec. 31, 2030. We provide Suncor with technical support to maximize performance and 
reliability of plant equipment. Ownership of the entire Poplar Creek cogeneration facility will transfer to Suncor in 2030. 

As  part  of  the  arrangement,  we  acquired  Suncor’s  20  MW  Kent  Breeze  wind  facility  located  in  Ontario  and  Suncor’s  
51 per cent interest in the 88 MW Wintering Hills merchant wind facility located in Alberta. The Kent Breeze facility has 
a 20-year contract with the Ontario IESO. On Jan. 26, 2017, we announced the sale of our 51 per cent interest in the 
Wintering Hills merchant wind facility for approximately $61 million.  

The Poplar Creek transaction creates value by increasing the duration of the contract to 2030 from the prior 2023 expiry, 
while the sale of Wintering Hills reduces our exposure to Alberta’s merchant power market, and allows us an injection of 
near-term liquidity and financial flexibility to pay down debt. Additionally, we were able to further leverage our interest 
in the Poplar Creek cogeneration facility by completing a private placement in late December, of $202.5 million bonds 
that mature in 2030 and are secured by a first ranking charge over the equity interests of the issuer that issued such bonds, 
further allowing us to deleverage our corporate debt. 

Windsor 
During 2015, we executed a new 15-year power supply contract with the Ontario IESO for our Windsor facility, which 
was effective Dec. 1, 2016. The contract is similar to the contract signed in 2013 for our Ottawa facility. Under the new 
contract, the plant will become dispatchable for up to 72 MW of capacity. The new contract provides long-term stable 
earnings for this facility. 

Parkeston 
During 2015, we executed an extension to our PPA to supply power to the Kalgoorlie Consolidated Gold Mine from our 
55 MW share of the Parkeston power station. The agreement extends the previous contract to October 2026 with options 
for early termination available to either party beginning in 2021. The contract extension will continue to provide stable 
cash flow for the business. 

Over the last four years, we have nearly tripled the weighted average remaining contractual life of our gas fleet from six 
years to 19 years. 

Engaging our workforce, developing our employees, and minimizing safety incidents are the keys to human capital value 
Human Capital
creation  at  TransAlta.  The  most  material  impacts  on  our  human  capital  performance  are  an  engaged  workforce  and 
keeping our employees safe. 

As at Dec. 31, 2017, we had 2,228 (2016 - 2,341) active employees. This number has decreased by four per cent since the 
previous year, following various restructuring initiatives to reduce costs and increase efficiency.  

Approximately 57 per cent of our employees are unionized. We strive to maintain open and positive relationships with 
union representatives and regularly meet to exchange information, listen to concerns, and share ideas that further our 
mutual  objectives.  Collective  bargaining  is  conducted  in  good  faith,  and  we  respect  the  rights  of  all  employees  to 
participate in collective bargaining.  

M58
M58  TRANSALTA CORPORATION 

TransAlta Corporation    |    2017  Annual Integrated Report 
 
 
 
 
 
 
 
 
Management’s Discussion and Analysis

Organizational Culture and Structure 
Our employees are central to value creation. Our corporate culture has been cultivated throughout our more than 100-
year heritage of pioneering innovative ways to safely and responsibly generate reliable and affordable electricity. In 2016, 
we formalized our core values to help provide strategic clarity for our employees. We want our people to align with and 
live our core values, which are: innovation, respect, loyalty, accountability, integrity, and safety. We seek to challenge our 
employees  to  maximize  their  potential.  We  encourage  alignment  with  our  values  and  work  ethic,  while  providing  a 
foundation for leadership, collaboration, community support, growth, and work/life balance. 

Our organizational structure consists of six levels, which helps facilitate pace and decision-making in our organization. 
Our business operates in a decentralized, business-centric model, with Coal & Mining, Gas & Renewables, Australia, and 
Energy Marketing and Trading defined as our four primary businesses. Our Corporate function oversees our business and 
provides strategic alignment.  

Employee Benefits 
TransAlta is an attractive employer in all three countries in which we operate. We provide compensation to our employees 
at levels that are competitive in relation to their respective location. We strive to be an employer of choice through our 
total rewards program, which includes various incentive plans designed to align performance with our annual and mid-
term targets, as determined annually by the Board. 

Also included in compensation are various retirement savings plans. We have registered pension plans in Canada and the 
US,  as  well  as  a  superannuation  plan  in  Australia.  The  plans  cover  substantially  all  employees  of  the  Corporation,  its 
domestic subsidiaries, and specific named employees working internationally. These plans have defined benefit (“DB”) and 
defined contribution (“DC”) options, and in  Canada there was an additional  DB supplemental pension plan (“SPP”) for 
members whose annual earnings exceed the Canadian income tax limit. The DB SPP was closed as of Dec. 31, 2015, and a 
new DC SPP commenced for only executive members effective Jan. 1, 2016. Current executives as of Dec. 31, 2015, were 
grandfathered  in  the  DB  SPP.  The  Australian  superannuation  plan  is  compulsory  for  employers  with  contributions 
required at a rate set by the government, currently 9.5 per cent of employees’ wages and salaries.   

The Canadian and US defined benefit pension plans are closed to new entrants, with the exception of the Highvale pension 
plan acquired in 2013. The US defined benefit pension plan was frozen effective Dec. 31,  2010, resulting in no future 
benefits being earned. The defined benefit plans are funded by the Corporation in accordance with governing regulations 
and  actuarial  valuations.  We  provide  other  health  and  dental  benefits  for  disabled  members  and  retired  members, 
typically up to the age of 65. The supplemental pension plan is non-registered and an obligation of the Corporation. We 
are not obligated to fund the supplemental pension plan but are obligated to pay benefits under the terms of the plan as 
they come due.  

Talent and Employee Development
Talent and employee development is a viewed as a key pillar of organizational health. In 2017, we conducted a Change 
Leadership Forum for our managing directors and in 2018 this program will be extended to managers. The two-day session 
is focused on organizational transformation with an emphasis on identifying root causes of barriers related to driving 
change. 

In  2017,  we  completed  a  six-month  (intermittent)  leadership  training  program,  called  Elevate,  for  our  middle 
management.  This  resulted  in  training  approximately  75  leaders  in  the  Corporation.  The  program  was  focused  on 
establishing a learner’s mindset, building trust and influence, strengths-based leadership, being transparent, providing 
feedback, collaboration as a team and innovation. In 2018, we are continuing this program with a focus on training our 
professionals and subject matter experts. Our professionals will be supported by our leaders who completed the program 
in 2017.  

In addition to Elevate, we launched a two-day leadership program in 2017 for all of our employees. The program, called 
Execution Engine, was designed to build capabilities for our people to create an organization that is both efficient and 
adaptive, while living our values. The training program was built on research into what is needed for our people to help 
drive and sustain change. With everyone taking this course (approximately 700 employees or 30 per cent in the past nine 
months)  the  learning  has  become  part  of  how  we  work.  Employees  learn  project  management  (i.e.,  idea  generation, 

M59
TRANSALTA CORPORATION M59 

TransAlta Corporation    |    2017  Annual Integrated Report 
 
 
 
 
 
 
Management’s Discussion and Analysis

planning, problem solving and prioritization), effective communication (i.e., presentations, meetings, emails), how to get 
the best out of people (coaching and influencing) and health (organizational health and personal resilience).  

Safety 
The safety of our people, communities and environment is one of our seven core values. At TransAlta we operate large 
and complex facilities. The environments in which we work, including Canadian winters and the Australian outback, often 
add an additional challenge to keep our employees safe. The safety of our staff, contractors, and visitors is the top priority 
of our social performance. Our safety culture is further embedded into TransAlta culture each year. Every meeting of more 
than four people starts with a “safety moment,” which helps share key safety learnings across the Corporation.  

Our approach to safety was revised in 2015 from only a focus on occupational safety to a focus on both occupational 
safety and preventative maintenance (targeted with safety in mind). With collaboration from ScottishPower, who achieve 
leading  safety  performance,  we  launched  our  total  safety  management  policy,  which  is  a  two-pronged  approach.  The 
policy builds on our occupational safety program, Target Zero, which is focused on protecting our workers on site, through 
personal protection equipment, inspections, safety controls, job safety analyses, field-level hazard assessments and safety 
communications. The policy is supplemented by our Operational Integrity program, which is focused on preventing all 
hazards from equipment, through definition and measurement of safety-critical performance measures and operating 
limits. Another way to think of Operational Integrity is preventative safety. 

This policy and approach has led to progress and results. In 2017 our Injury Frequency Rate (“IFR”) was 0.72 (2016 - 0.85). 
IFR is defined as the number of injuries (lost-time and medical) for every 200,000 hours worked. Our ultimate goal is to 
achieve zero injury incidents, but annually we seek improvement over the prior year. Fortunately, we have experienced no 
fatalities during the last three years. Our target IFR in 2018 is 0.53, a 20 per cent reduction over 2017 performance.  

In 2017, we introduced a new key performance indicator to help us further improve our safety performance. Total Incident 
Frequency  (“TIF”)  tracks  the  total  number  of  injuries  (medical  aids,  lost-time  injuries,  restricted  works  and  first  aids) 
relative to employee hours worked. First aids can be minor (such as a cut or scratch) nevertheless, incident awareness and 
understanding  provide  us  with  preventative  safety  knowledge,  which  translates  into  education  for  employees  and 
subsequently injury avoidance. Our TIF in 2017 was 3.54. We are targeting a TIF of 2.83 in 2018, a 20 per cent reduction 
over 2017 performance. As noted above, our long-term goal is zero. 

Year ended Dec. 31

IFR

TIF

2017

0.72

3.54

2016

0.85

-

2015

0.75

-

We reward our plants for safety leadership annually, and this year our President’s Award for Safety Leadership went to 
the  Ottawa  Health  Sciences  Centre  Cogeneration  Team.  Our  cogeneration  facility  in  Ottawa  supports  the  Ottawa 
Hospital. This facility and its team have logged zero lost-time injuries for more than six years — and the effort didn’t only 
come from our employees. More than 100 contractors, logging more than 50,000 contractor hours, completed their work 
without  a  single  lost-time  injury.  Our  team  at  our  Sarnia  facility  also  displayed  great  safety  leadership  in  2017.  The 
team had 300,000 worker exposure hours in 2017 without injury and has had 1.15 million exposure hours since an injury 
last occurred. 

Intellectual capital at TransAlta is another key to value creation. Our employee culture is supported by a long-term and 
Intellectual Capital 
sustainable approach, as evidenced by over 100 years in business. A long-term commitment lends itself to goodwill and 
brand recognition, something we value and don’t take for granted. We believe our low cost and clean power strategy, 
supported by our internal values and sustainable approach to business, will help support and continue to increase our 
brand recognition positively. 

The experience and acumen of our employees further enhances our capital value creation. This is evidenced by our 18-
month  ongoing  internal  transformation,  called  Project  Greenlight.  This  project  is  focused  on  bottom-up  innovation, 
specifically fostering a culture of idea generation, development of ideas into projects with defined KPIs, milestones and 

M60
M60  TRANSALTA CORPORATION 

TransAlta Corporation    |    2017  Annual Integrated Report 
 
 
 
 
                                  
                                
 
 
 
Management’s Discussion and Analysis

execution or delivery dates, and ongoing project management to ensure success. Where we fail, we idea generate, build 
and test again. Since inception, we have completed 900 bottom-up initiatives. 

We believe that global marketplace disruption is here to stay and we recognize that to adapt to the pace of change and 
remain  competitive,  our  employees  must  be  nimble,  adaptive  and  work  smarter  and  faster.  For  further  details  on  our 
investment  in  our  workforce,  please  see  the  Talent  and  Employee  Development  discussion  in  the  Human  Capital 
subsection of this MD&A.  

In addition, our teams continuously explore the use of applied or new technologies to find solutions to expand or adapt 
our  fleet  in  an  ever-changing  world,  which  helps  protect  our  shareholder  value  and  maintain  delivery  of  reliable  and 
affordable electricity. 

The following are further examples of how we have developed innovative solutions to optimize and maximize value from 
our fleet: 

Operations Diagnostic Centre 
TransAlta  has  run  its  Operations  Diagnostic  Centre  (“ODC”)  since  2008.  The  ODC  monitors  coal-fired,  gas-fired,  and 
wind-generating assets across Canada, the United States, and Australia. A centralized team of engineers and operations 
specialists remotely monitors our power plants for emerging equipment reliability and performance issues. ODC staff are 
trained in the development and use of specialized equipment monitoring software and can apply their experience in power 
plant operations. If an equipment issue is detected, the ODC notifies plant operations to investigate and remedy the issue 
before there is an impact to operations. The monitoring, analysis, and diagnostics completed by the ODC are focused on 
early  identification  of  equipment  issues  based  on  longer-term  trend  analysis  and  complements  day-to-day  plant 
operations. 

Operational Integrity Program
Our Operational Integrity program is the integration of sustainability, specifically safety, into asset management. It is a 
program designed to achieve process and equipment safety by understanding and monitoring of key operational risks and 
implementation  of  mitigation  measures.  Consider  it  proactive  safety.  In  2017,  we  put  into  place  our  Total  Safety 
Management  System,  which  integrates  our  work  in  Process  Safety  with  our  existing  strength  in  Occupational  Safety 
programs. We continue to see a positive increase in self-reporting and addressing process safety hazards as awareness 
and new tools are being introduced. This is evidenced by our trend in safety incidents, which decreased in 2017 to an IFR 
of  0.72  (0.85  in  2017).  This  was  one  of  our  best  safety  performance  years  in  our  history.  Our  goal  is  zero  and  the 
Operational Integrity program is a tried and tested tool to help propel us closer to this goal. 

Innovation: Applied Technologies 
TransAlta  has  been  at  the  forefront  of  innovation  in  the  power  generation  sector  since  the  early  1900s  when  we 
developed hydro assets. To add context, these assets were developed at the same time as the automobile. We have been 
an early adopter and developer of wind technology in Canada and today are the largest wind generator in the country. 
Today we run a Wind Control Centre, the only one of its kind in Canada, that monitors, to the second, each and every wind 
turbine we operate across North America. In 2015, we made our first investment in solar technology with the purchase of 
a 21 MW solar facility in Massachusetts. 

As we move towards our vision of becoming the leading clean power corporation in Canada by 2030 we continue to seek 
solutions  to  innovate  and  create  value  for  investors,  society  and  the  environment.  This  is  evidenced  by  our 
announcements  of  the  accelerated  coal-to-gas  conversion  plans,  the  expansion  of  our  Kent  Hills  wind  farm  in  New 
Brunswick, the proposed solar development in New South Wales, Australia, and the exploration of our proposed Brazeau 
hydro expansion, a 600-900 MW pumped hydro expansion that will double our hydro capacity in Alberta. Hydro is a clean 
alternative to both coal and gas and has long-term life. We still operate some of our legacy hydro assets from the early 
1900s today. 

We strive to keep up to date with power technologies that have the potential to redefine power markets today and in the 
future. Innovation is constantly happening on a more micro scale at TransAlta. For further communications on innovation 
at TransAlta, please visit www.transalta.com/about-us/innovation. 

M61
TRANSALTA CORPORATION M61 

TransAlta Corporation    |    2017  Annual Integrated Report 
 
 
 
 
 
 
Management’s Discussion and Analysis

Creating shared  value  for our  stakeholders is the key to social and  relationship value creation at TransAlta. The most 
Social and Relationship Capital 
material impacts to our social and relationship performance are public health and safety, anti-competitive behaviour and 
fostering better relationships and conditions with all stakeholders, but with a key focus on Indigenous groups. Each year 
we strive to do better in each of these areas. 

Public Health and Safety 
We seek to ensure public health and safety through measures such as restricting physical access to our operating sites 
and  by  minimizing  our  environmental  impact.  It  is  our  goal  to  both  keep  our  employees  safe  and  the  peoples  and  the 
communities in which we operate. 

We specifically look to protect against the following risks: 
▪  harm to person(s); 
▪  damage to property; 
▪ 
▪ 

increased liability due to negligence; and 
loss of organizational reputation and integrity. 

When addressing concerns such as occupiers’ liability, our Corporate Security team liaises with stakeholders to facilitate 
appropriate security countermeasures and  controls to prevent  or reduce the identified risk.  For example,  in 2017 we 
reduced  the  risk  of  cliff  jumping  on  or  close  to  our  hydro  facilities  west  of  Calgary.  We  increased  awareness  through 
a collaborative multi-agency approach and tightened up the boundaries with the introduction of natural resources, such 
as foliage and large boulders, to prevent vehicular access to jump spots.  

A safety signage project was launched across hydro in the Canmore valley and Seebe area. Our partners also supported 
this action, with: 
▪  ATCO reinforcing its facility access with fencing;  
▪  CP Rail placed effective signage and patrols; and 
▪ 

the Stoney Nation Band emergency services increasing patrols and signage. 

We also co-ordinated and conducted trespassing  patrols  in  the area  with Parks  Canada,  RCMP  and bylaw officers.  In 
addition, identified jump spots were physically taken down with our property owners in the area. 

We  actively  monitor  air  emissions  from  our  coal  and  gas  plants.  Our  large  coal  facilities  have  Continuous  Emissions 
Monitoring Systems in place, which help us monitor our pollutant emission levels to ensure they are in line with acceptable 
limits. When we are in breach of regulatory limits we report this to regulatory bodies and conduct a root cause analysis to 
understand how we can eliminate future breaches from occurring. In 2017, we had one sulphur dioxide breach at our 
Centralia coal plant.  

Of  note,  our  coal  plants  currently  capture  80  per  cent  of  mercury  emissions  and  the  majority  of  particulate  matter 
emissions.  Both  mercury  and  particulate  matter  emissions  have  been  deemed  harmful  to  human  health,  which  we 
recognize and work to minimize through capture. The health impact risk from emissions that do reach our environment is 
minimized due to the location of our plants, which are located away from urban environments. Independent studies dated 
Nov.  19,  2015,  and  conducted  by  University  of  Alberta  scientist  Dr.  Warren  Kindzierski,  using  provincial  government 
monitoring data over nine years, also show that approximately 10 per cent or less of all particulate matter in the airshed 
in  the  largest  urban  environment  close  to  our  facilities,  Edmonton,  can  be  attributed  to  coal  combustion  emissions. 
Chemical  “signatures”  for  emissions  pointed  to  several  sources  of  air  quality  concern  in  Edmonton,  including  local 
industry, vehicles and wood-burning fireplaces. 

Assuming  reasonably  anticipated  growth  and  operating  scenarios,  future  GHG  emissions  and  air  pollution  emissions 
performance will be dramatically reduced in respect of our existing assets in the next five years following the sale of the 
Solomon Power Station to FMG and as we execute our coal-to-gas conversion strategy. GHG emissions from coal will be 
cut within the range of 60 per cent or 12 million tonnes CO2e. We currently capture 80 per cent of mercury emissions at 
our coal plants, but post-coal burn mercury emissions will be eliminated. Particulate matter and sulphur dioxide emissions 

M62
M62  TRANSALTA CORPORATION 

TransAlta Corporation    |    2017  Annual Integrated Report 
 
 
 
 
 
 
 
Management’s Discussion and Analysis

will be virtually eliminated or considered negligible post-coal and diesel burn. Our nitrogen dioxide emissions will also be 
reduced in the range of approximately 50 per cent.  

Indigenous Relationships and Partnerships 
The focus of our efforts in this area is to establish solid relationships with Indigenous and Métis communities, recognizing 
and respecting their rights and focusing on engaging them at the earliest stages of any applicable project or development. 
Specifically, our Aboriginal Relations team continues to develop and enhance aboriginal relations in areas of employment, 
economic development, community engagement, and investment. In 2017, we once again achieved the Canadian Council 
for  Aboriginal  Business’s  silver-level  Progressive  Aboriginal  Relations  certification.  In  2016,  we  introduced  our  STAR 
tracking program, which functions as a communication record-keeping and engagement measurement tool. This capacity 
fulfils our requirements for consultation with stakeholders and aboriginal groups alike, and is capable of producing reports 
(notably, government reports) as proof of engagement and consultation efforts. 

In 2017, we supported an Indigenous Leadership Program at Banff Centre for Arts and Creativity. Approximately 250 
Indigenous leaders from over 120 communities attended. With help from TransAlta and other supporters, Banff Centre 
awarded scholarships to 191 leaders from 102 Indigenous communities across Canada, giving them the opportunity to 
attend this Indigenous Leadership Program.  

Over the past five years, TransAlta’s support has provided 39 scholarships for members of Indigenous communities to 
attend the programs and take that learning back to their communities. Those participants have come from communities 
across Alberta and British Columbia including the First Nations of Alexis Nakota Sioux, Bearspaw, Chiniki, Enoch Cree, 
Ermineskin Cree, Fort McKay, Kainai, Montana, Paul, Piikani, Samson Cree, Siksika, Squamish, Tsuu T’ina, and Wesley. 

Stakeholder Relationships
Relationships matter to TransAlta. Driven by our values, we seek to maximize value creation for our stakeholders and 
TransAlta. 

TransAlta Stakeholders 
Our stakeholders are people. Regardless of who they represent, our goal is to act in the best interests of the Corporation 
and to create value across our stakeholder chain. Major stakeholder categories can be summarized as shareholders, debt 
holders,  business  partners,  contractors,  consultants,  customers,  community  organizations,  employees,  governments, 
Indigenous groups, industry and professional bodies, media, NGOs, public and regulatory affairs, residents and suppliers. 
This too encompasses our value chain. Our mindset is value creation across this chain. 

Engagement Framework 
Our  stakeholder  engagement  framework  is  modelled  and  closely  tied  to  the  stakeholder  engagement  aspect  of  ISO 
14001,  which  is  an  internationally  recognized  environmental  management  standard.  This  framework  is  a  streamlined 
corporate-wide  approach  to  ensure  that  engagement  and  relationship-building  practices  are  consistent  across 
TransAlta’s locations and types of work. 

Methods of Engagement 
In  order  to  run  our  business  successfully,  we  are  in  consistent  two-way  communication  with  the  majority  of  our 
stakeholders, some more than others. As an example, our dialogue with customers is daily, iterative and takes on many 
forms including meetings (in-person, virtual, and one-one), calls, emails, newsletters and feedback systems (online loops). 
It  is  both  proactive  and  reactive.  Our  approach  and  our  goal  is  to  be  proactive,  which  is  communicating  consistent 
messaging  and  information,  while  being  transparent.  There  are  often  times  we  will  need  to  be  reactive,  such  as  to  a 
customer complaint, and we commit to timely and professional resolution using values-based dialogue. We then work to 
identify how to mitigate further issues, moving back to our proactive approach. 

M63
TRANSALTA CORPORATION M63 

TransAlta Corporation    |    2017  Annual Integrated Report 
 
 
 
 
Management’s Discussion and Analysis

Part of our business is growth, which we achieve by developing or purchasing new assets. We proactively engage with 
many stakeholders in all of our geographic operating areas in Australia, Canada and the United States in order to develop 
and  maintain  relationships;  assess  needs  and  fit;  and  to  seek  out  collaborative  and  sustainable  value  creation 
opportunities.  

Recently  we  completed  construction  of  our  South  Hedland  150  MW  combined-cycle  plant  in  Western  Australia.  The 
project took four years from RFP to commercial operation. Achieving construction and commercial operation was the 
outcome of successful stakeholder engagement and collaboration. We recently announced our coal-to-gas transition plan, 
secured by way of collaborative stakeholder engagement. This plan involved signing a Memorandum of Understanding 
with the Alberta government, which highlights the project fit for Alberta, not just TransAlta. The  coal-to-gas project is 
expected to significantly reduce the environmental impact from coal (a reduction in air pollution and GHG emissions) 
while enabling the transition and addition of 5,000 MW of renewable energy by 2030. We are also currently exploring the 
expansion of our Brazeau hydro facility, which, once again, involves the collaboration, participation and approval of many 
stakeholders.  

More details on our stakeholder engagement activities can be found via our social media channels. 

Engagement Tracking and Reporting 
Our  Stakeholder  and  Indigenous  Relations  tracking  program  functions  as  a  Corporation-wide  communication  record-
keeping tool, which is managed by our Stakeholder and Indigenous Relations team. This capacity fulfils our requirements 
for consultation with stakeholders and aboriginal groups alike, and is capable of producing reports (notably, government 
reports) as proof of engagement and consultation efforts. Built as an in-house application, this tool has no operating cost 
or  fees  and  has  the  ability  to  grant  different  levels  of  access  to  information.  Furthermore,  the  tool  can  store  email 
conversations, documents and voice-mail messages related to any project, event, or issue, and use them in reports. It can 
also  produce  an  array  of  statistical  reports  showing  frequencies  and  volumes  of  engagement  based  on  project, 
stakeholder, stakeholder group, issue or keywords. 

Engagement and Board Communication
The Board believes that it is important to have constructive engagement with its shareholders and other stakeholders and 
has established means for the shareholders of the Corporation and other stakeholders to communicate with the Board 
through  the  use  of  a  confidential  Ethics  Helpline  or  by  writing  directly  to  the  Board.  The  contact  information  for 
communicating  with  the  Board  is  published  in  the  Whistleblower  section  of  this  MD&A.  Shareholders  and  other 
stakeholders may, at their option, communicate with the Board on an anonymous basis. The Corporation has also adopted 
a Shareholder Engagement Policy that describes the Board’s approach to shareholder communication. In addition, the 
Board has adopted an annual non-binding advisory vote on the Corporation’s approach to executive compensation. The 
Corporation  is  committed  to  ensuring  continued  good  relations  and  communications  with  its  shareholders  and  other 
stakeholders and will continue to evaluate its practices in light of any new governance initiatives or developments. 

Highlights 
In early 2018 we launched our new energy services for customers. Our customer solutions team has partnered with best-
in-class energy service providers to help businesses achieve: 
energy consumption and energy costs management; 
▪ 
▪  market price risks and volume exposure mitigation; 
▪ 
▪  monitoring of energy market design changes, price signals and applicable and available incentives. 

sustainability initiatives such as self-generated electricity; and 

Our energy services include solar, energy efficiency audits, distributed generation and building automation. To learn more, 
please visit the Energy Services customer page on our website. 

Supply Chain 
We continue to seek solutions to advance supply chain sustainability. In 2017 we partnered with Ivalua Inc. to optimize 
our global supply chain management operations. After an exhaustive review of all leading vendors, Ivalua was selected for 
its  comprehensive  Source-to-Pay  platform,  flexible  architecture  and  overall  ability  to  give  TransAlta  a  competitive 

M64
M64  TRANSALTA CORPORATION 

TransAlta Corporation    |    2017  Annual Integrated Report 
 
 
 
 
 
 
Management’s Discussion and Analysis

advantage. Key business values that we expect include increased supply chain efficiency, reduced lead times, lower costs 
and improved supplier performance. 

We  continue  to  offer  our  business  units  optional  sustainability  terms  and  conditions  for  inclusion  within  supplier 
agreements.  These  terms  and  conditions  include  suppliers  communicating  their  sustainability  policies,  strategy  and 
performance;  documented  systems  for 
labour  practices;  environmental  management  systems;  disclosure  of 
environmental infringements; disclosure of anticompetitive behavior; disclosure on climate change management; third-
party  certifications  on  products;  and  demonstration  of  community  investments.  Furthermore,  as  we  explore  major 
projects, such as our Brazeau hydro expansion, we are assessing vendors both at the RFP evaluation stage and in up-front 
information requests on such elements as safe work practices, environmental practices and Indigenous spend. This means, 
for example, getting information on: 
▪ 
▪ 
▪ 
▪ 

estimated value of services that will be procured though local Indigenous businesses (in RFP template); 
estimated number of local Indigenous persons that will be employed (in RFP template); 
understanding overall community spend and engagement; and 
understanding through interview processes and stakeholder work the state of community relations. 

Local Communities 
TransAlta creates value for local communities through the generation of an essential service. We provide reliable, cost-
efficient  and  clean  power  in  Australia,  Canada  and  the  United  States.  With  the  phase-out  of  coal,  we  seek  to  secure 
favourable outcomes for our workers and the communities surrounding our plants. Our proposed coal-to-gas conversions 
provide  the  opportunity  to  maintain  some  jobs  during  conversions,  support  sector  jobs,  and  redeploy  some  of  our 
workforce  in  the  plants  or  toward  renewables  growth.  Electricity  and  energy  have  always  been  at  the  heart  of  the 
economy in Alberta, and any changes in the industry must therefore support our communities. Conversion will also help 
keep municipal, provincial and federal tax revenues supporting these communities. TransAlta advocates for sufficiently 
long timelines  for transition to minimize disruption and  negative economic impact,  and to  provide  support for  facility 
redevelopment, funds for retraining, and economic diversification. 

Community Investments
During 2017, TransAlta contributed $2.6 million in donations and sponsorships (2016 - $2.5 million). One of our major 
community investments is to United Way campaigns across Canada and the US. This year, TransAlta employees, retirees, 
contractors and the Corporation raised over $1.28 million and directed over $0.2 million to United Way youth education 
programs. 

In 2017, we had a focus on youth education and achieved our target to direct $0.75 million of community investment to 
this  cause.  Some  of  our  partnerships  included  the  University  of  Calgary,  Southern  and  Northern  Alberta  Institutes  of 
Technology, Mount Royal University, Banff Centre for Arts and Creativity (Indigenous leadership scholarships), Mother 
Earth Children's Charter School (Indigenous kindergarten to grade 9), Calgary Stampede (The Young Canadians - ages 7 
to 18), national Canada and US Indigenous scholarships (post-secondary for trades and academic) and the Alberta Council 
for Environmental Education. 

On  July  30,  2015,  we  announced  a  US$55  million  community  investment  over  10  years  to  support  energy  efficiency, 
economic and community development, and education and retraining initiatives in Washington State. The US$55 million 
community investment is part of the TransAlta Energy Transition Bill, passed in 2011. This bill was a historic agreement 
between policymakers, environmentalists, labour leaders, and TransAlta to transition away from coal in Washington State, 
closing the Centralia facility’s two units, one in 2020 and the other in 2025.  

In 2017, some highlights from grant investment included construction of an 86 kW solar project at the Tenino High School 
and construction of a 56 kW solar photovoltaic project for the library at Centralia College (both projects reducing power 
bills and CO2 emissions). A new boiler system for the Toledo Elementary School is planned in 2018. Projects that promote 
a clean economy transition in Washington State will be ongoing until 2025. 

M65
TRANSALTA CORPORATION M65 

TransAlta Corporation    |    2017  Annual Integrated Report 
 
 
 
 
 
 
Management’s Discussion and Analysis

Natural Capital 
We  continue  to  increase  value  from  natural  capital-related  business  activities,  while  reducing  our  carbon  footprint. 
Comparable EBITDA from renewable energy generation in 2017 was $289 million (2016 - $277 million). Our revenue in 
2017 from carbon-related offsets was $27.7 million (2016 - $29 million). In addition, innovation-related natural capital value 
creation was in the range of $25 million to $35 million, primarily from sale of coal byproducts, but also from waste related 
recycling.  

The following are key natural capital KPI trends: 

Year ended Dec. 31

Renewable energy comparable EBITDA

Carbon offsets revenue
GHG emissions (million tonnes C02e)

2017

289

27.7

29.9

2016

277

29.0

30.7

2015

249

18.9

32.2

Natural Capital Management 
All energy sources used to generate electricity have some impact on the environment. While we are pursuing a business 
strategy that includes investing in low impact renewable energy resources such as wind, hydro, and solar, we also believe 
that natural gas will continue to play an important role in meeting energy needs as part of this transition. In 2017 we 
accelerated our transition from coal to gas. We are planning to convert six of our coal units to gas by 2022. We expect that 
by 2025 our owned asset generation capacity will be 100 per cent gas and renewables. 

Regardless of the fuel type, we place significant importance on environmental compliance and continued environmental 
impact  mitigation,  while  seeking  to  deliver  low-cost  electricity.  Currently  the  most  material  natural  or  environmental 
capital impacts to our business are GHG emissions, air emissions (pollutants, metals), and energy use. Material impacts 
that we manage and track include our environmental management systems, environmental incidents and spills, land use, 
water usage, and waste management. 

In the jurisdictions in which we operate, legislators have proposed and enacted regulations to discontinue, over time, the 
use of the technologies our coal-fueled plants currently utilize. Our gas and coal facilities can also incur costs in relation 
to  their  carbon  emissions,  depending  on  the  jurisdiction  in  which  the  facility  is  located.  Our  contracted  facilities  can 
generally recover those costs from the customer. Conversely, our renewable generation facilities are generally able to 
realize value from their environmental attributes. We continue to closely monitor the progress and risks associated with 
environmental legislation changes on our future operations. 

Reducing the environmental impact of our activities benefits not only our operations and financial results, but also the 
communities  in  which  we  operate.  We  expect  that  increased  scrutiny  will  be  placed  on  environmental  emissions  and 
compliance, and therefore we have a proactive approach to minimizing risks to our results. Our Board provides oversight 
with  respect  to  the  Corporation’s  monitoring  of  environmental  regulations  and  public  policy  changes  and  to  the 
establishment  and  adherence  to  environmental  practices,  procedures  and  polices  in  response  to  legal/regulatory  and 
industry compliance or best practices.  

Our environmental initiatives include: 
▪  Renewable power growth and offsets portfolio: Over the last 10 years, we have added approximately 1,300 MW in 
renewable energy capacity. In 2017, 360 MW of our Alberta wind capacity was eligible to generate offsets at a rate 
of $20 tonne CO2e. Annual revenue generation from these offsets was in the range of $10 million to $15 million. In 
2018, as per rules associated with the new Alberta Carbon Competitiveness Incentive, our offset eligibility capacity 
will expand to include additional capacity from our wind fleet and hydro fleet. The price of offsets will also rise to 
$30/tonne CO2e. We expect Alberta offset revenue to rise to approximately $25 million in 2018. 
Environmental  controls  and  efficiency:  We  continue  to  make  operational  improvements  and  investments  in  our 
existing generating facilities to reduce the environmental impact of generating electricity. We have installed mercury 
control equipment at all of our coal operations and we achieve an 80 per cent capture rate of mercury at all coal 
facilities.  Our  Keephills  3  and  Genesee  3  plants  use  supercritical  combustion  technology  to  maximize  thermal 

▪ 

M66
M66  TRANSALTA CORPORATION 

TransAlta Corporation    |    2017  Annual Integrated Report 
 
 
                   
                   
                   
                  
                  
                  
                  
                  
                  
 
 
 
 
 
Management’s Discussion and Analysis

▪ 

▪ 

efficiency,  as  well  as  sulphur  dioxide  (“SO2”)  capture  and  low  oxides  of  nitrogen  (“NOx”)  combustion  technology. 
Uprate  or energy-efficiency  projects completed at our Keephills and Sundance plants,  including a 15 MW uprate 
finalized in 2015 at Sundance 3, have improved the energy and emissions efficiency of those units. 
Planning:  With  respect  to  environmental  rules  (as  detailed  in  the  following  Regional  Regulation  and  Compliance 
subsection), we investigate the cost effectiveness of multiple technological solutions and various operating models 
in order to prepare appropriate work scopes.  
Policy  participation:  We  are  active  in  policy  discussions  at  a  variety  of  levels  of  government  and  with  industry 
participants. Where capacity retirements are being mandated, we advocate minimizing the capital requirements of 
incremental regulation, to allow reinvestment in lower-intensity sources during the transition phase. In Washington 
State, the retirement of our Centralia coal plant was established through a multi-stakeholder agreement. In 2016 we 
entered into the OCA with the Alberta Government totalling $524 million, and a Memorandum of Understanding to 
facilitate the conversion of coal plants to gas and the development of a capacity market. 

In addition to these initiatives, we maintain procedures for environmental incidents similar to our safety practices, with 
tracking, analyzing, and active management to eliminate occurrence, and ongoing support from our Operational Integrity 
program.  With  respect  to  biodiversity  management,  we  seek  to  establish  robust  environmental  research  and  data 
collection to establish scientifically sound baselines of the natural environment around our facilities and closely monitor 
the air, land and water in these areas to identify and curtail potential impacts. 

Environmental Performance
All of our 67 facilities have Environmental Management Systems (“EMS”) in place, the majority of which closely align the 
internationally recognized ISO 14001 EMS standard. We have operated our facilities in line with ISO 14001 for 18 years, 
and our systems and knowledge of management systems are therefore mature. We no longer certify our Alberta coal 
plants as ISO 14001, but the plants continue to run best practice EMS. Only two of our facilities do not closely track ISO 
14001, which is due to commercial arrangements (we are not the primary operator), but these facilities still have EMS. 

Environmental Incidents and Spills 
We recorded five significant environmental incidents in 2017 (2016  - 16 incidents), which was below our target of 11. 
This  was  a  record  year  for  TransAlta  and  reflects  our  continuous  improvement  in  tracking,  presorting  and  identifying 
potential hazards. All incidents occurred at our coal fleet. None of these incidents resulted in a material environmental 
impact.  

The following are the environmental incidents by fuel types: 

Year ended Dec. 31

Coal

Gas and renewables

Total environmental incidents

2017

2016

2015

5

-

5

13

3

16

10

2

12

Incident types in 2017 included the expiry of an approval to transfer water, an SO2 exceedance at our Centralia plant, a 
pump failure leading to an unplanned discharge and a hydrocarbon spill leading to contamination of soil and groundwater. 
All incidents were managed in line with our EMS practice and resolved quickly. We continue to target improvement and 
our  corporate-wide  2018  target  is  nine  or  fewer  incidents.  We  also  continue  to  track  and  manage  all  non-reportable 
(minor)  environmental  incidents,  which  helps  us  identify  what  causes  an  incident.  Understanding  the  root  cause  of 
incidents helps with incident prevention planning and education. 

Typical spills at TransAlta are hydrocarbon spills, which happen in low environmental impact areas and are almost always 
contained and recovered. It is extremely rare that we experience large spills with impact on the environment. Spills that 
do occur that we must report are typically just above acceptable regulatory spill limits and these are always addressed 
with a critical time factor. The estimated volume of spills in 2017 was 15 m3 (2016 - 61 m3). 

M67
TRANSALTA CORPORATION M67 

TransAlta Corporation    |    2017  Annual Integrated Report 
 
 
                         
                      
                      
                          
                         
                         
                         
                      
                      
 
 
 
 
Management’s Discussion and Analysis

Air Emissions 
In 2017, air emissions were down compared with 2016. Air emissions decreased slightly in  line with reduction in coal 
power generation and reduction in diesel combustion. Our future air emissions performance will be dramatically reduced 
in the next five years in respect of our existing assets as we execute our coal-to-gas conversion strategy and following the 
sale of our Solomon Power Station to FMG. We currently capture 80 per cent of mercury emissions at our coal plants, but 
post-coal  burn  mercury  emissions  will  be  eliminated  following  conversion.  Particulate  matter  and  sulphur  dioxide 
emissions will be virtually eliminated or considered negligible post-coal and diesel burn. Our nitrogen dioxide emissions 
will also be reduced in the range of approximately 50 per cent.  

Year ended Dec. 31

Sulphur dioxide (tonnes)

Nitrogen oxide (tonnes)

Particulate matter (tonnes)

Mercury (kilograms)

2017

36,200

44,400

5,000

110

2016

39,600

48,400

4,900

130

2015

41,800

48,000

4,900

170

Water 
Our principal water uses are for cooling and steam generation in coal and gas plants, and for hydro power production. 
Typically,  TransAlta  withdraws  in  the  range  of  220-240  million  m3  of  water  across  our  fleet.  In  2017  we  withdrew  
213 million m3 and returned approximately 172 million m3 back to its source. Water is withdrawn primarily from rivers, 
where  we  hold  permits  to  withdraw  water  and  adhere  to  regulations  on  water  quality.  We  return  or  discharge 
approximately 70 per cent of  water back to the source,  meeting the regulatory quality  levels that exist in  the various 
locations in which we operate. The difference between withdraw and discharge, representing consumption, is largely due 
to evaporation loss. 

The following represents our total water consumption (million m3 ) over the last three years: 

Year ended Dec. 31

Water from environment

Water to environment

Total water consumption

2017

213

172

41

2016

239

197

42

2015

258

212

46

Our areas of higher water risk are situated east of Perth in our simple-cycle gas plants in Western Australia and in our southern 
Alberta hydro operations. We monitor and manage water risk in our operating areas east of Perth. In southern Alberta, following 
the flood of 2013, our hydro facilities are being used for a greater water management role than they have played in the past. 
During 2016, we signed a five-year agreement with the Government of Alberta to manage water on the Bow River at our Ghost 
reservoir facility to aid in potential flood mitigation efforts, as well as at our Kananaskis Lakes System (which includes Interlakes, 
Pocaterra and Barrier), for drought mitigation efforts. 

Land Use 
The largest land use associated with our operations is for surface mining of coal. Of the three mines we have operated, 
Whitewood is completely reclaimed and the land certification process is ongoing. Our Centralia mine in Washington State 
is currently in the reclamation phase (35 per cent reclaimed), and our Highvale mine in Alberta is actively mined with 
certain sections undergoing reclamation. Our reclamation plans are set out on a life-cycle basis and include contouring 
disturbed areas, re-establishing drainage, replacing topsoil and subsoil, re-vegetation, and land management. Our mining 
practice incorporates progressive reclamation where the final end use of the land is considered at all stages of planning 
and development. 

In 2017, we reclaimed 57 acres (23 hectares) at our Highvale mine, which was below our target of 74 acres (30 hectares). 
This  was  due  to  competing  priorities  for  equipment  and  inclement  weather  (early  thaw  and  rain),  which  limited  the 
opportunities to meet the topsoil placement goal. The Centralia mine is no longer actively used for coal operations, but 
reclamation  activity  is  ongoing.  In  2017,  we  reclaimed  16  hectares  of  land.  Our  Centralia  mine  team  added  another 
150,000 Douglas Fir during the 2017 planting season, bringing the number of trees planted since 1991 to over 1.8 million.  

M68
M68  TRANSALTA CORPORATION 

TransAlta Corporation    |    2017  Annual Integrated Report 
            
            
            
            
            
            
               
               
               
                   
                   
                   
 
 
 
                   
                   
                   
                   
                   
                   
                      
                      
                      
 
 
 
 
Management’s Discussion and Analysis

In 2016, we decommissioned our Cowley Ridge wind plant, which was Canada’s first commercial wind plant constructed 
in 1993 and reached its end of life in 2016. During this process, our wind operations team recycled: 
▪ 
▪ 
▪ 
▪ 

54 towers weighing 20,000 pounds; 
61 nacelles — the housing of the turbine generating components — weighing 22,000 pounds; 
19 transformers weighing 9,000 pounds; and 
32,000 litres of oil. 

Our recycling efforts meant that we diverted 2,609,000 pounds from the land fill. This job was completed safely, and in 
addition generated around $0.15 million of value from the recycled components. This work reflects TransAlta’s values of 
innovation and safety, while maintaining a positive environmental impact at our operations. 

In 2015, we donated 64 acres of land to the 
. The land includes an area 
that was once a mine settling pond and is now a site of ecological significance. The donation aligns with our objectives for 
community participation and stakeholder engagement. 

Waste
Our  operating  teams  work  to  minimize  waste  and  maximize  recoverable  value  from  waste.  Over  the  years,  we  have 
invested  in  equipment  to  capture  byproducts  from  the  combustion  of  coal,  such  as  fly  ash,  bottom  ash,  gypsum,  and 
cenospheres,  for  subsequent  sale.  These  non-hazardous  materials  add  value  to  products  like  cement  and  asphalt, 
wallboard,  paints,  and  plastics.  Byproduct  sales  and  associated  annual  revenue  generation  typically  ranges  from  $25 
million to $35 million. 

Energy Use 
TransAlta uses energy in a number of different ways. We burn coal, gas, and diesel to generate electricity. We harness the 
kinetic  energy  of  water  and  wind  to  generate  electricity.  We  also  use  the  sun  to  generate  electricity.  In  addition  to 
combustion of fuel sources we also track combustion of fuel in the vehicles we use and energy use in the buildings we 
occupy. Knowledge of how much energy we use allows us to optimize and create energy efficiencies.  

As an energy corporation, we naturally look for ways to optimize or create efficiencies related to the use of energy. Our 
coal-to-gas  conversions  display  one  innovative  way  we  intend  to  reduce  a  significant  amount  of  energy  use  and 
significantly reduce our environmental impact, while returning the generation of reliable and low-cost power supply to 
Albertan customers. 

The following captures our energy use (millions of gigajoules). On a comparable basis, our energy use has declined over 
the last three years as a result of lower generation from our coal-generating assets. 

Year ended Dec. 31 (in millions of GJ)

Coal

Gas and renewables

Corporate

Total energy use

2017

447.4

49.4

0.1

496.9

2016

469.1

59.2

0.1

528.4

2015

483.4

58.9

0.1

542.4

M69
TRANSALTA CORPORATION M69 

TransAlta Corporation    |    2017  Annual Integrated Report 
 
 
 
 
 
               
               
               
                  
                  
                  
                     
                     
                     
               
               
               
 
Management’s Discussion and Analysis

Greenhouse Gas Emissions 
In 2017,  we estimate that 29.9 million tonnes of GHGs with  an intensity of 0.86 tonnes per MWh (2016-30.7 million 
tonnes of GHGs with an intensity of 0.83 tonnes per MWh) were emitted as a result of normal operating activities.(1) Our 
GHG emissions decreased in 2017, primarily as a result of lower emissions from our gas facilities. In 2017 our Mississauga 
plant was no longer operational and our Windsor plant transitioned to a peaking facility. In Australia, our diesel burn at 
Parkeston and Solomon Power Station significantly declined. Our coal GHG emissions were relatively flat overall. At our 
Centralia plant in Washington State production increased due to market demand, which increased our emissions from the 
facility by 1.4 million tonnes of CO2e. This was offset by lower production and associated emissions (-1.6 million tonnes 
of CO2e) from our Alberta coal fleet.  

The following are our GHG emissions in million tonnes CO2: 

Year ended Dec. 31 (in million tonnes C02)
Coal

Gas and renewables

Total GHG emissions

2017

27.4

2.5

29.9

2016

27.7

3.0

30.7

2015

29.2

3.0

32.2

Our total GHG emissions include both scope 1 and scope 2 emissions(2). Scope 1 emissions in 2017 were estimated to be 
29.7 million tonnes CO2e. Scope 2 emissions were estimated to be 0.2 million tonnes CO2e. We estimate our scope 3 
emissions to be in the range of six million tonnes.  

In 2017, TransAlta maintained its scoring on the Carbon Disclosure Project Climate Change investor request. Our overall 
score was a B, which places us as ahead of our peers when it comes to carbon disclosure, management, performance and 
leadership. We were also highlighted by the Chartered Professional Accountants of Canada (“CPA Canada”) as the only 
company  in  Canada,  out  of  75  companies,  that  reports  on  climate  change  across  all  levels  of  disclosure:  the  Annual 
Information Form, this MD&A, and our information circular. Our 2016 Integrated Report was selected as a finalist for CPA 
Canada’s  Award  of  Excellence  in  Corporate  Reporting  –  of  note,  our  Climate  Change  disclosure  was  highlighted  as 
“outstanding” by CPA Canada Judges.  

Climate Change 
We believe in open and transparent reporting on climate change. Our climate change reporting is guided by the Financial 
Stability  Board  Task  Force  on  Climate  Related  Financial  Disclosures  recommendations.  The  following  highlights  our 
management  of  climate  change  related  impacts.  For  more  detailed  information,  please  visit  our  Climate  Disclosure 
webpage: https://www.transalta.com/sustainability/climate-change-action-and-strategy/ 

(1)  2017 data are estimates based on best available data at the time of report production. GHGs include water vapour, CO2, methane, nitrous oxide, sulphur hexafluoride, 
hydrofluorocarbons,  and  perfluorocarbons.  The  majority  of  our  estimated  GHG  emissions  are  comprised  of  CO2  emissions  from  stationary  combustion.  Emissions 
intensity data has been aligned with the “Setting Organizational Boundaries: Operational Control” methodology set out in The Greenhouse Gas Protocol: A Corporate 
Accounting and Reporting Standard. As per the methodology, TransAlta reports emissions on an operation control basis, which means that we report 100 per cent of 
emissions at facilities in which we are the operator. Emissions intensity is calculated by dividing total operational emissions by 100 per cent of production (MWh) from 
operated facilities, regardless of financial ownership. 

(2) The GHG Protocol Corporate Standard classifies a company’s GHG emissions into three ‘scopes’. Scope 1 emissions are direct emissions from owned or controlled 
sources. Scope 2 emissions are indirect emissions from the generation of purchased energy. Scope 3 emissions are all indirect emissions (not included in scope 2) that 
occur in the value chain of the reporting company, including both upstream and downstream emissions. 

M70
M70  TRANSALTA CORPORATION 

TransAlta Corporation    |    2017  Annual Integrated Report 
 
 
                  
                  
                  
                     
                     
                     
                  
                  
                  
 
 
 
 
                                                 
 
Management’s Discussion and Analysis

Climate  change  related  risks  are  monitored  through  our  Corporation-wide  risk  management  processes  and  actively 
managed.  Identified  climate  change  risks  and  opportunities  are  also  reviewed  by  our  management  team.  We  apply 
regionally  specific  carbon  pricing,  both  current  and  anticipated,  as  a  mechanism  to  manage  future  risks  pertaining  to 
uncertainty in the carbon market and as a safeguard to anticipate future impacts of regulatory changes on our facilities. It 
is also a method of modelling for future electricity prices and analyzing the viability of acquisitions. Identified climate 
change  risks  or  opportunities  and  carbon  pricing  are  recognized  in  the  annual  TransAlta  long-and-medium  range 
forecasting processes. Regulatory risk/compliance (coal electricity generation), physical risks (hydro and drought/floods) 
and monetary opportunities (gas and renewable electricity generation) are the main drivers of integration into business 
strategy. 

Aligned with our business strategy is our climate change strategy, which is implemented and managed on a corporate-
wide business unit level, consisting of four main areas of focus: 
▪ 
▪ 
▪ 
▪ 

energy-efficiency improvements; 
development of emissions offset portfolios to achieve emissions reductions at competitive costs; 
development of clean combustion technologies; and 
growth of our renewables portfolio as an increasing component of our total generation portfolio. 

We  seek  investment  in  climate  change  related  mitigation  solutions  where  we  can  maximize  value  creation  for  our 
shareholders,  local  communities,  and  the  environment.  Conversion  of  our  large  coal  fleet  to  gas-fired  generation 
highlights  this  approach,  which  will  allow  us  to  run  our  assets  longer  than  the  federally  mandated  coal  retirement 
schedule. Our goals for undertaking such anticipated actions are to enhance value for our shareholders, ensure low-cost 
and reliable power for Albertans, and reduce the environmental impact from coal-fired generation. 

Our investment and growth in renewable energy is highlighted by our diverse portfolio of renewable energy generating 
assets. We currently operate over 2,200 MW of hydro, wind and solar power. We are the largest producer of wind power 
in Canada and the largest producer of hydro power in Alberta. Production from renewable energy in 2017 resulted in 
avoidance of over 3.1 million tonnes of CO2e, which is equivalent to removing over 660,000 vehicles from North American 
roads over the same year. For further details on governance and risk, see the Governance and Risk Management section 
of this MD&A. 

Climate  change  related  risks  are  monitored  through  our  Corporation-wide  risk  management  processes  and  actively 
managed. Identified climate change risks and opportunities are identified at the business unit level and through corporate 
functions (government relations, regulatory, emissions trading, and sustainability). Risks and opportunities are reviewed 
by our management team quarterly and reported to the Governance Environment and Safety Committee (“GESC”) of the 
Board and the Audit and Risk Committee of the Board, as applicable. 

M71
TRANSALTA CORPORATION M71 

TransAlta Corporation    |    2017  Annual Integrated Report 
 
 
 
 
Management’s Discussion and Analysis

Risk or opportunity
Policy requirements

Carbon pricing

New technology

Adaptation and 
mitigation

Water stress

Management approach
TransAlta supports smart regulation and carbon pricing that ensures economic growth and certainty for 
investment. We have also demonstrated co-operation and collaboration on climate-related policy, while 
ensuring we protect value for employees and shareholders. This is evidenced by our Off-Coal Agreement 
with the Alberta Government, totalling $524 million and Memorandum of Understanding to convert coal 
plants to gas. Further climate-related policy updates can be found in the Regional Regulation and Compliance 
subsection of this MD&A

Our corporate function attributes regionally specific carbon pricing, both current and anticipated, as a 
mechanism to manage future risks pertaining to uncertainty in the carbon market and as a safeguard to 
anticipate future impacts of regulatory changes on facilities. This information is directed to the business unit 
level for further integration. Identified climate change risks or opportunities and carbon pricing are 
recognized in the annual TransAlta long-and-medium range forecasting processes. We capture economic 
profit from carbon markets through generation of renewable energy credits or offsets and via our emission 
trading function, which seeks to commoditize and profit from carbon trading.

We have demonstrated upside in growing renewable and gas power generation. From 2000 to 2017 we have 
grown renewable capacity from approximately 900 MW to over 2,200 MW. Our proposed Brazeau hydro 
expansion is an innovative energy storage project, which would involve a 900 MW expansion of the facility to 
operate as a pumped hydro facility.

Our clean power strategy means that all new investment must meet clean standards in order to mitigate 
potential future risk related to carbon policy and pricing. Our target is for 100 per cent of net generation 
capacity to be from gas and renewables capacity by 2025. Our coal-to-gas conversion plan in Alberta is an 
adaptive measure to climate change related policy. Using existing infrastructure significantly reduces capital 
costs compared with new gas builds and also results in the avoidance of approximately $15/MW in carbon 
related pricing (assuming a $30 per tonne carbon price). Our new gas facility at South Hedland Power Station 
is built with adaptation in mind. The facility will operate with a best-in-class emission intensity, and the 
facility uses less water than traditional gas plants as we use dry cooling towers as opposed to the normal wet 
cooling towers (wet cooling tower have heavy water consumption). The plant is designed to withstand a 
category 5 cyclone, which can frequent the northwest region of  Western Australia. Category 5 is the highest 
cyclone rating. Floods, which can occur in the area, have been mitigated by constructing the facility above the 
normal flood levels.

Our thermal plants require water for operation. The majority of our thermal facilities are operated in low 
water stress environments. Our most water-stressed area of operation is at Sarnia; however, due to the 
nature of the operation, 98 per cent of water is recycled. The plant is a cogeneration facility. At all of our coal 
facilities we hold licences to pull water from low stressed areas. In Australia we purchase water for 
operations, and despite operating in remote locations, these areas are not currently  water-stressed. Water 
purchasing will allow us to minimize local water stress if this becomes an issue. Our operating cost increase 
exposure due to water in Australia is low as our thermal operations are small. 

Weather 
Abnormal weather events can impact our operations and give rise to risks. In addition, normal year-over-year variations 
in wind, solar, water and temperatures give rise to various levels of volume risk depending on the input fuel of each facility; 
events outside the design parameters of our facilities give rise to equipment  risk; and fluctuations in temperatures can 
cause commodity price risk through impact on customer demand for heating or cooling. Refer to the Governance and Risk 
Management section of this MD&A for further discussion of each risk and our related management strategy. 

During  the  past  five  years,  some  deviations  from  expected  weather  patterns  have  negatively  impacted  our  annual 
financial results: 
▪ 

the southern Alberta flood of 2013 disrupted our hydro operations and caused us to invest in substantial repair work. 
Our losses have been largely covered through insurance; 

M72
M72  TRANSALTA CORPORATION 

TransAlta Corporation    |    2017  Annual Integrated Report 
 
Management’s Discussion and Analysis

▪  warm weather in Alberta in 2015 increased derates at our coal facilities due to its impact on the Sundance cooling 
ponds. These cooling ponds are susceptible to warm weather; however, we anticipate that decreased coal production 
and the retirement and mothballing of Sundance Units 1 and 2, respectively, in the medium term will reduce the stress 
from such occurrence; and 
our Alberta mine was susceptible to significant rain starting in August of 2016, which resulted in several weeks of 
flooding and impacted our coal deliveries. We focused on improving drainage infrastructure and using stockpiles to 
mitigate future risks. 

▪ 

Over the same period, other deviations have positively impacted our financial results, such as the cold temperatures in 
eastern North America in the winter of 2014 that caused market volatility and benefitted our Energy Marketing Group. 

Adaptation 
Our new South Hedland gas facility in Western Australia started commercial operation in 2017. The facility is built with 
adaptation  in  mind.  The  facility  will  operate  with  a  best-in-class  emission  intensity  for  gas  power  generation  and  the 
facility uses less water than traditional gas plants as we use dry cooling towers as opposed to the normal wet cooling 
towers (wet cooling towers have heavy water consumption).  The plant is designed to withstand a category 5 cyclone, 
which can frequent this region. Category 5 is the highest cyclone rating. The plant was also constructed above normal 
flood levels, as floods can occur in the area. 

In 2017, our wind  operations team developed and implemented  a Blade Icing Mitigation program designed to reduce 
downtime  of  wind  turbines  during  icing  events.  The  program  entails  weather  forecasting  data,  revised  standard 
procedures and alarms for both active and forecasted icing conditions. Created for our wind farms in Ontario, Quebec 
and New Brunswick, this program allows our technicians to analyze the data before an icing event occurs and reduce the 
time during which the wind turbines are shut down, in turn increasing the generating time, revenue opportunity and safety 
of the wind turbines. Typically, we lose 40,000 MWh annually due to icing events. In 2017, we set a goal to reduce this by 
5 per cent or $0.25 million. In its first season, the program has saved over $0.6 million. This program will be extremely 
valuable to ongoing operations of the wind turbines during the winter months. 

Regional Regulation and Compliance 
Carbon pricing and related legislation will continue to have an impact on our business. We are committed to complying 
with legislative and regulatory requirements and to minimizing the environmental impact of our operations. We work 
with  governments  and  the  public  to  develop  appropriate  frameworks  to  protect  the  environment  and  to  promote 
sustainable development. 

Recent changes to carbon regulations may materially adversely affect us. As indicated under “Risk Factors” in our Annual 
Information Form and within the Governance and Risk Management section of this MD&A, many of our activities and 
properties are subject to carbon requirements, as well as changes in our liabilities under these requirements, which may 
have a material adverse effect upon our consolidated financial results. 

Canadian Federal Government 
In November 2016, the Canadian federal government announced that coal-fired generation would be phased out by 2030, 
following a similar commitment by the Alberta provincial government in November 2015. These decisions changed the 
coal plant closure requirements, which had previously been guided by federal regulations that became effective on July 
1, 2015, and that provided for up to 50 years of life for coal units. According to the new shutdown requirements, the 
Corporation’s older coal units (which retire prior to 2030) will be guided by the 50-year life rule, while newer units (which 
were  previously  scheduled  to  retire  post-2030)  will  face  the  new  2030  shutdown  date.  In  November  2016,  the 
Corporation  signed  an  OCA  with  the  Alberta  government  that  confirmed  the  2030  shutdown  commitment  for  the 
impacted units. 

On Nov. 21, 2016, the Canadian federal government announced that the Department of Environment and Climate Change 
will develop regulations for gas-fired generation. The announcement confirmed plans to include specific rules for coal-to-
gas converted units, including a proposed 15-year life and a separate emissions intensity standard. The Canadian federal 
government conducted consultations on the proposed regulation in the first two quarters of 2017. Finalized regulations 
are currently expected by the end of 2018. 

M73
TRANSALTA CORPORATION M73 

TransAlta Corporation    |    2017  Annual Integrated Report 
 
 
 
 
 
Management’s Discussion and Analysis

On  Oct.  3,  2016,  the  Canadian  federal  government  announced  its  intention  to  implement  a  national  price  on  GHG 
emissions. Under this proposal, beginning in 2018, there would be a price of $10 per tonne of carbon dioxide equivalent 
emitted,  rising  to  $50  per  tonne  by  2022,  or  a  comparable  reduction  in  GHGs  under  a  cap-and-trade  program.  The 
application of the price would be co-ordinated with  provincial jurisdictions. We  are currently assessing how this price 
mechanism will affect our operations. 

Alberta 
On Nov. 22, 2015, the Government of Alberta announced, through the CLP, its intent to phase out emissions from coal-
fired generation by 2030, replace two-thirds of the retiring coal-fired generation with renewable generation and impose 
a new carbon price of $30 per tonne of CO2 emissions based on an industry-wide performance standard. On March 16, 
2016, the Government of Alberta announced the appointment of a Coal Phase-out Facilitator to work with coal-fired 
electricity generators, the AESO, and the Government of Alberta to develop options to phase out emissions from coal-
fired  generation  by  2030.  The  Coal  Phase-out  Facilitator  was  tasked  with  presenting  options  to  the  Government  of 
Alberta that would strive to maintain the reliability of Alberta’s electricity grid, maintain stability of prices for consumers 
and avoid unnecessarily stranding capital. 

In March 2016, Alberta began developing its renewable energy procurement process design for the AESO to procure a 
first block of renewable generation projects to be in-service by mid-2019. On Sept. 14, 2016, the Government of Alberta 
reconfirmed its commitment to achieve 30 per cent renewables in Alberta’s electricity energy mix by 2030. On May 24, 
2016,  the  Government  of  Alberta  passed  the  Climate  Leadership  Implementation  Act  which  establishes  the  carbon 
framework for its application to fuels. It was effective for the electricity sector on Jan. 1, 2018.  

On  Nov.  24,  2016,  we  announced  that  we  had  entered  into  the  OCA,  which  provides  for  transition  payments  for  the 
cessation of coal-fired emissions from the Keephills 3, Genesee 3 and Sheerness coal-fired plants on or before Dec. 31, 
2030. The affected plants are not, however, precluded from generating electricity at any time by any method other than 
the combustion of coal. Under the terms of the OCA, the Corporation will receive annual cash payments of approximately  
$37.4  million,  net  to  the  Corporation,  commencing  in  2017  and  terminating  in  2030.  For  further  details,  refer  to  the 
Highlights section of this MD&A. 

Additionally, we announced that we had reached an understanding set out in the MOU to collaborate and co-operate with 
the Government of Alberta in the development of a policy framework to facilitate the conversion of coal-fired generation 
to gas-fired generation, to facilitate existing and new renewable electricity development through supportive and enabling 
policy, and to ensure existing generation and new electricity generation are able to effectively participate in the capacity 
market being developed for the Province of Alberta. 

On Jan. 1, 2018, the Alberta government transitioned from Specified Gas Emitters Regulation  (“SGER”) to the Carbon 
Competitiveness  Incentive  Regulation  (“CCIR”).    Under  the  CCIR,  the  regulatory  compliance  moved  from  a  facility-
specific compliance standard to a product/sectoral performance compliance standard. The carbon price remains set at 
$30/tCO2e from 2018 to 2022 and will then follow the federal price increase to $40/tCO2e in 2021 and $50/tCO2e in 
2022. The electricity sector performance standard was set at 0.37tCO2e/MWh but will decline over time. All renewable 
assets that received crediting under the SGER will continue to receive credits under CCIR on a one-to-one basis. All other 
renewable assets that did not receive credits under SGER will now be able to opt into the CCIR and get carbon crediting 
up to the electricity sector performance standard in perpetuity. Once the wind projects crediting standard under SGER 
ends, these renewable projects will also be able to opt into the CCIR and receive crediting. 

In Alberta there are additional requirements for coal-fired generation units to implement additional air emission controls 
for oxides of NOx and SO2 once the units reach the end of their respective PPAs, which in most cases is in 2020. These 
regulatory  requirements  were  developed  by  the  province  in  2004  as  a  result  of  multi-stakeholder  discussions  under 
Alberta’s Clean Air Strategic Alliance (“CASA”). The release of the federal regulations in 2012 adopted by the Government 
of  Canada  and  the  Government  of  Alberta,  and  the  accelerated  coal-fired  generation  retirement  schedule,  creates  a 
potential misalignment between the CASA air pollutant requirements and schedules and the retirement schedules for the 
coal  plants,  which  in  themselves  will  result  in  significant  reductions  of  NOx,  SO2  and  particulate  emissions.  This  is 
something which has been identified as a matter yet to be addressed in the MOU. 

M74
M74  TRANSALTA CORPORATION 

TransAlta Corporation    |    2017  Annual Integrated Report 
 
 
 
 
 
 
Management’s Discussion and Analysis

The Government of Alberta’s Renewable Electricity Program is intended to encourage the development of 5,000 MW of 
new renewable electricity capacity by 2030. The AESO solicited interest in the first competitive procurement for 400 
MW  in  2017.  Eligible  projects  must  be  5  MW  or  larger  and  can  be  hydro,  wind,  solar  and  certain  biomass.  The  first 
competition utilized an indexed renewable energy credit or contract for difference mechanism that will fix the price to the 
proponent for over 20 years. Four successful projects were announced in December of 2017, for nearly 600 MW of wind 
generation at a weighted average bid price of $37/MWh.  

The Government of Alberta has tasked the AESO with transitioning Alberta’s energy-only market to a capacity market 
structure.  The capacity  market will help to ensure that there  is sufficient supply adequacy,  as over 6,000 MW of coal 
generation retires by 2030. The new market structure is expected to reduce reliance on scarcity pricing, which drives 
energy price volatility and the price signal for new investment, and to compensate resource owners with monthly capacity 
payments for making their capacity available in the energy and ancillary services market. The AESO is currently engaging 
with stakeholders in determining the design and implementation of the capacity market. The AESO will begin formalizing 
the capacity market design and implementing it in the second half of 2018, with the first procurement expected in the 
second half of 2019, to be effective in 2021, with first capacity contracts awarded at that time.  

Pacific Northwest 
Our  Centralia  coal  facility  is  located  in  Washington  State.  On  Dec.  17,  2014,  Washington  State  Governor  Jay  Inslee 
released a carbon-emissions reduction program for the state. Included in that program were a cap-and-trade plan and a 
low-carbon fuels standard, with the proposed emissions cap becoming more stringent over time, providing emitters time 
to transition their operations. A late-2017 Court of Appeals case found that the Governor’s Clean Air Rule was beyond 
his authority to implement.  

On Aug. 3, 2015, the US federal government announced the Clean Power Plan (“CPP”). The plan set out GHG emission 
standards  for  new  fossil-fuel-based  power  plants  and  emission  limits  for  individual  states.  States  had  the  option  of 
interpreting their limits in mass-based (tons) or rate-based (pounds per MWh) terms. The plan was intended to achieve an 
overall reduction in GHG emissions of 32 per cent from 2005 levels by 2030.  On Feb. 9, 2016, the US Supreme Court 
stayed  the  implementation  of  the  Clean  Power  Plan,  pending  consideration  of  whether  the  regulations  are  lawful. 
Currently, the Environmental Protection Agency (“EPA’) is not expected to implement the CPP, although the EPA will still 
have an obligation to address climate change emissions. The EPA’s new approach to addressing climate change has yet to 
be defined or consulted on. The US also provided notice of its intention to withdraw from the 2015 Paris Agreement. 

TransAlta has agreed with Washington State to retire its two  Centralia coal units in 2020 and 2025 respectively. This 
agreement is formally part of the State’s climate change program. We currently believe that there will be no additional 
GHG regulatory burden on US Coal given these commitments. The related TransAlta Energy Transition Bill was signed 
into  law  in  2011  and  provides  a  framework  to  transition  from  coal  to  other  forms  of  generation  in  the  State.  We  are 
currently evaluating a number of transition solutions. 

Ontario 
On Feb. 25, 2016, Ontario released draft regulations for its GHG cap-and-trade program that were finalized on May 19, 
2016. The regulations became effective Jan. 1, 2017, and will apply to all fossil fuels used for electricity generation. The 
majority of our gas-fired generation in Ontario will not be significantly impacted by virtue of change-in-law provisions 
within existing PPAs. 

Australia 
In March 2017, state elections were held in Western Australia and a change of government took place. The new Labor 
government  announced  a  road  map  for  electricity  initiatives.  The  reform  program  focuses  on  three  pillars  of  work:  
improving access to Western Power’s network, improving reserve capacity and pricing signals, and improving access to, 
and operation of, the Pilbara electricity network.  

Coal Transition 
Our coal transition, whether it is executing on our coal-to-gas conversion plans or completing a full phase-out by 2030, is 
expected to vastly improve our environmental performance. Energy use, GHG, air emissions, waste generation and water 
usage is expected to significantly decline. A conversion of coal-fired power generation to gas-fired generation is expected 
to eliminate all mercury emissions and the majority of nitrogen oxide emissions. 

M75
TRANSALTA CORPORATION M75 

TransAlta Corporation    |    2017  Annual Integrated Report 
 
 
 
Management’s Discussion and Analysis

Stakeholder Communication and Value Creation 
2017 Sustainability Performance  
The information contained herein seeks to highlight our ability to create value for investors, stakeholders and society in 
the short, medium and long term. The selection of key information and key metrics disclosed in this integrated report and 
our  full  sustainability  disclosures  follow  a  materiality  assessment  process,  which  identifies  key  impact  areas  to  our 
stakeholders. We subsequently are guided by, and place focus on, reporting on these key areas. More information on key 
areas of materiality can be found in the sustainability section of our website.  

Sustainability Targets and Results1 
Sustainability targets are strategic goals that support the long-term success of our business. Targets are set in line with 
business unit goals to manage key areas of concern for stakeholders and ultimately improve our environmental and social 
performance in these areas.  

Financial 
Achieve and maintain investment grade 
credit metrics

2017 Sustainability Targets
Results
Partly achieved

1. Maintain our 
investment 
grade rating

Comments
TransAlta maintains investment grade ratings 
from three out of four rating agencies: 
S&P (BBB-) negative outlook, DBRS (BBB low) 
stable outlook, and Fitch (BBB-) stable outlook

2. Increase 
focus on FFO(1) 
and EBITDA(1) 

Deliver comparable EBITDA and FFO in the 
range of $1,025 million to $1,135 million 
and $765 million to $855 million 
respectively

Achieved

For the year ended Dec. 31, 2017, comparable 
EBITDA was $1,062 million and FFO was reported 
at $804 million

 (1)  Represents our original outlook. In the second quarter we reduced the following 2017 targets: Comparable EBITDA from the previously announced target range of 
$1,025 million to $1,135 million to $1,025 to $1,100 million, FFO from the previously announced target range of $765 million  to $855 million to $765 million to 
$820 million FCF target range to $270 million to $310 million from the previously announced target range of $300 million to $365 million. 

M76
M76  TRANSALTA CORPORATION 

TransAlta Corporation    |    2017  Annual Integrated Report 
 
 
 
 
                                                 
 
Management’s Discussion and Analysis

Human and Intellectual

Results

Comments

3. Reduce safety 
incidents

Achieve an Injury Frequency Rate below 
0.50

Not achieved

4. Human 
Resources

Maintain voluntary turnover percentage 
under eight per cent  

Not achieved

5. Support 
employee 
development

Continue development plans for all high-
potential employees at the top three levels 
of the organization

Achieved

Natural

Keep recorded incidents (including spills 
and air infractions) below 11

Results

Achieved

6. Minimize fleet-
wide 
environmental 
incidents

Although we missed our target, we achieved one of 
our lowest IFRs in our history. Our 2017 IFR was 
0.72, a 15 per cent improvement over 2016 
performance
Our voluntary turnover in 2017 was 11 per cent. 
We seek to maintain voluntary turnover or attrition 
under eight per cent as this is considered a healthy 
amount of attrition for a corporation. As we 
transition away from coal-fired generation and its 
associated jobs we face significant workforce 
challenges with retention. The lack of job security 
and uncertainty is unsettling for many of our coal 
employees and we faced this challenge in 2017

In 2017, we completed a six-month (intermittent) 
leadership training program, called Elevate, for our 
middle management. This resulted in the training of 
approximately 75 leaders in our company. The 
program was focused on establishing a learner’s 
mindset, building trust and influence, strengths-
based leadership, being transparent, providing 
feedback, collaboration as a team and innovation

Comments

We recorded 5 signficant environmental incidents 
in 2017, none of which had a material 
environmental impact. This was a 54 per cent 
improvement over 2016 performance

7. Increase mine 
reclaimed acreage

Replace annual topsoil at Highvale mine at 
a rate of 74 acres/year

Partly achieved We were able to replace 57 acres in 2017. 

Competing priorities for equipment and inclement 
weather (early thaw and rain) limited the 
opportunities to meet the topsoil placement goal

8. Utilize coal by-
product

Sell a minimum of two million tonnes of coal 
byproduct materials during the period 
2015 to 2017

Achieved

We reused and sold over 2 million tonnes of coal 
byproducts (fly ash, bottom ash, cenospheres and 
gypsum) from 2015 to 2017

9. Reduce air 
emissions

95 per cent reduction from 2005 levels of 
TransAlta coal facility NOx and SO2 
emissions by 2030

On track

We reduced levels of NOx and SO2 in 2017 by close 
to 4,000 tonnnes collectively and remain on track to 
realize these emission reductions by 2030

10. Reduce GHG 
emissions

a) Our goal, in line with a commitment to 
the UN Sustainable Development Goals 
(SDGs), is to reduce our total GHG 
emissions in 2021 to 30 per cent below 
2015 levels

b) Our goal, in line with a commitment to 
the UN SDGs and prevention of two 
degrees Celsius of global warming, is to 
reduce our total greenhouse gas emissions 
in 2030 to 60 per cent below 2015 levels

On track

On track

We reduced GHG emissions in 2017 by close to 1 
million tonnes and we remain on track to realize 
emission reductions by 2021/2030

M77
TRANSALTA CORPORATION M77 

TransAlta Corporation    |    2017  Annual Integrated Report 
Management’s Discussion and Analysis

11. Support youth 
education with 
community 
investment

Social and Relationship

Approximately $0.75 million of community 
investment spending will be directed to 
supporting youth education

Results

Achieved

12. Increase 
internal best 
practice Aboriginal 
engagement 
awareness

Develop an engagement and consultation 
best practices document for project 
planning and development as a guide for 
employees to work with Indigenous 
communities and stakeholders 

Achieved

Comprehensive

13. Transition from 
coal to gas-fired 
and renewable 
generation

Continue negotiations with the 
Government of Alberta, using a principles-
based approach, to ensure we have 
regulation certainty and the capacity 
needed to invest in clean power

Results

Achieved

Comments

Some of our partnerships included the University of 
Calgary, Southern and Northern Alberta Institute of 
Technology, Mount Royal University, Banff Centre 
for Arts and Creativity (Indigenous leadership 
scholarships), Mother Earth Children's Charter 
School (Indigenous kindergarten to grade 9), 
Calgary Stampede (The Young Canadians - ages 7 to 
18), national Canada and US Indigenous 
scholarships (post-secondary for trades and 
academic) and the Alberta Council for 
Environmental Education

An Indigenous Awareness presentation was 
developed, which includes historical facts and basic 
concepts around consultation and engagement, 
which will be shared with all employees. The same 
presentation will be used at the Schulich School of 
Engineering at the University of Calgary in 2018 for 
one of their ethics courses

Comments

We signed a Memorandum of Understanding with 
the Alberta Government in 2016 to advance coal to 
gas conversions, expand credits for existing 
renewable energy facilities and level the playing 
field for incumbents from a capacity market. We 
also signed an OCA with the Alberta Government 
totaling $524 million of compensation to the 
Corporation

Our 2018 and longer-term sustainability targets support the long-term success of our business. Targets are set in line with 
2018 Sustainable Development Targets 
business unit goals to manage key areas of concern for stakeholders and ultimately improve our environmental and social 
performance in these areas. We continue to evolve and adapt targets to focus on anticipated key areas of materiality to 
stakeholders. Targets are outlined below: 

1. Reduce safety incidents

Achieve an Injury Frequency Rate below 0.53

Human and Intellectual

Annual Performance Status

20 per cent improvement over 
2017 performance (0.75)

Achieve a Total Incident Frequency rate below 2.83

New target

2. Manage employee turnover Maintain voluntary turnover percentage under eight per cent  

3. Support employee 
development

Advance our Elevate leadership training, completing training for 
75 professionals or subject matter experts

Consistent with 2017 target, 
we seek to maintain voluntary 
turnover under 8 per cent as 
this is considered a healthy 
amount of turnover

Builds upon 2017 target and 
our continued focus on 
employee development

M78
M78  TRANSALTA CORPORATION 

TransAlta Corporation    |    2017  Annual Integrated Report 
 
 
 
 
 
Management’s Discussion and Analysis

Natural

Annual Performance Status

4. Minimize fleet-wide 
environmental incidents

Keep recorded incidents (including spills and air infractions) 
below 9

20 per cent improvement over 
2017 target

5. Increase mine reclaimed 
acreage

Replace annual topsoil at Highvale mine at a rate of 
70 acres/year

Below 2017 target (74 acres)

6. Reduce air emissions

95 per cent reduction from 2005 levels of TransAlta coal facility 
NOx and SO2 emissions by 2030

Consistent with 2017 (long-
term target)

7. Reduce GHG emissions

Our goal, in line with a commitment to the UN Sustainable 
Development Goals (SDGs), is to reduce our total GHG emissions 
in 2021 to 30 per cent below 2015 levels (Our GHG and clean 
power targets assume reasonably anticipated growth and 
operating scenarios)

Our goal, in line with a commitment to the UN SDGs and 
prevention of two degrees Celsius of global warming, is to reduce 
our total GHG emissions in 2030 to 60 per cent below 2015 levels 
(Our GHG and clean power targets assume reasonably 
anticipated growth and operating scenarios)

Consistent with 2017 (long-
term target)

Social and Relationship

Annual Performance Status

8. Support quality education for 
youth

Support equal access to all levels of education for youth and 
Indigenous peoples

New target

Approximately $0.75 million of community investment spending 
will be directed to supporting youth education

Consistent with 2017 target

Our education goal and targets 
support UN SDG Goal 4: Quality 
Education related to ensuring 
“inclusive and equitable quality 
education” and related to 
“eliminating gender disparities in 
education”

9. Increase internal best 
practice Aboriginal engagement 
awareness

Develop sustainability and indigenous engagement materials for 
Integration within our developmental leadership programs at 
TransAlta

New target

10. TransAlta will be a leading 
clean power company by 2030

By 2022, we will convert six coal plant units from coal-fired 
generation to gas-fired generation

New target

Comprehensive

Annual Performance Status

By 2025, 100 per cent of our owned asset company-wide net 
generation capacity will be from gas and renewables

New target

Our clean power goal and targets 
support the UN SDG Goal 7: 
Affordable and Clean Energy 
related to ensuring “access to 
affordable, reliable, sustainable 
and modern energy”

We will continue to seek new opportunities to grow our portfolio 
of 2,265 MW wind, hydro and solar assets

New target

Continue to explore viability of Brazeau 900 MW pumped hydro 
expansion – doubling our hydro capacity in Alberta

New target

M79
TRANSALTA CORPORATION M79 

TransAlta Corporation    |    2017  Annual Integrated Report 
 
Management’s Discussion and Analysis

Our business activities expose us to a variety of risks and opportunities including, but not limited to, regulatory changes, 
Governance and Risk Management 
rapidly changing market dynamics, and increased volatility in our key commodity markets. Our goal is to manage these 
risks  and  opportunities  so  that  we  are  in  position  to  develop  our  business  and  achieve  our  goals  while  remaining 
reasonably  protected  from  an  unacceptable  level  of  risk  or  financial  exposure.  We  use  a  multilevel  risk  management 
oversight structure to manage the risks and opportunities arising from our business activities, the markets in which we 
operate and the political environments and structures with which we interface. 

The key elements of our governance practices are:   
Governance
employees, management and the Board are committed to ethical business conduct, integrity, and honesty; 
▪ 
▪  we have established key policies and standards to provide a framework for how we conduct our business; 
the Chair of our Board and all directors, other than our Chief Executive Officer (“CEO”), are independent; 
▪ 
the Board is comprised of individuals with a mix of skills, knowledge and experience that are critical for our business 
▪ 
and our strategy; 
the effectiveness of the Board is achieved through annual evaluations and continuing education of our directors; and  
our management and Board facilitate and foster an open dialogue with shareholders and community stakeholders. 

▪ 
▪ 

Commitment to ethical conduct is the foundation of our corporate governance model. We have adopted the following 
codes of conduct to guide our business decisions and everyday business activities:   
▪  Corporate Code of Conduct, which applies to all employees and officers of TransAlta and its subsidiaries, 
▪  Directors’ Code of Conduct,  
▪ 
▪ 

Finance Code of Ethics, which applies to all financial employees of the Corporation, and  
Energy Trading Code of Conduct, which applies to all of our employees engaged in energy marketing. 

Our  codes  of  conduct  outline the  standards  and  expectations  we  have  for  our  employees,  officers  and  directors  with 
respect to the protection and proper use of our assets. The codes also provide guidelines with respect to securing our 
assets, conflicts of interest, respect in the workplace, social responsibility, privacy, compliance with laws, insider trading, 
environment, health and safety, and our commitment to ethical and honest conduct. Our Corporate Code of Conduct goes 
beyond the laws, rules, and regulations that govern our business in the jurisdictions in which we operate; it outlines the 
principal business practices with which all employees must comply.  

Our employees, officers, and directors are reminded annually about the importance of ethics and professionalism in their 
daily work, and must certify annually that they have reviewed and understand their responsibilities as set forth in the 
respective codes of conduct. This certification also requires our employees, officers, and directors to acknowledge that 
they have complied with the standards set out in the respective code during the last calendar year.  

The Board is responsible for overseeing the management of the Corporation by establishing key policies and standards, 
including  policies  for  the  assessment  and  management  of  principal  risks  and  strategic  plans.  The  Board  monitors  and 
assesses the performance and progress of the Corporation’s goals through candid and timely reports from the CEO and 
the senior management team. We have also established an annual evaluation process whereby our directors are provided 
with an opportunity to evaluate the Board, Board committees, individual directors, and the chair’s performance. 

In order to allow the Board to establish and manage the financial, environmental, and social elements of our governance 
practices,  the  Board  has  established  the  Audit  and  Risk  Committee  (“ARC”),  the  GESC,  and  the  Human  Resources 
Committee (the “HRC”).  

M80
M80  TRANSALTA CORPORATION 

TransAlta Corporation    |    2017  Annual Integrated Report 
 
 
 
 
 
 
 
 
 
Management’s Discussion and Analysis

The ARC, consisting of independent members of the Board,  provides assistance to the Board in  fulfilling its oversight 
responsibility  relating  to  the  integrity  of  our  financial  statements  and  the  financial  reporting  process;  the  systems  of 
internal accounting and financial controls; the internal audit function; the external auditors’ qualifications and terms and 
conditions  of  appointment,  including  remuneration;  independence;  performance  and  reports;  and  the  legal  and  risk 
compliance programs as established by management and the  Board. The ARC approves our Commodity and Financial 
Exposure Management policies and reviews quarterly Enterprise Risk Management reporting. 

The  GESC  is  responsible  for  developing  and  recommending  to  the  Board  a  set  of  corporate  governance  principles 
applicable to the Corporation and for monitoring the compliance with these principles. The GESC is also responsible for 
Board recruitment and for the nomination of directors to the Board and its committees. In addition, the GESC assists the 
Board in fulfilling its oversight responsibilities with respect to the Corporation’s monitoring of environmental, health and 
safety regulations and public policy changes and the establishment and adherence to environmental, health and safety 
practices, procedures, and policies. The GESC also receives an annual report on the annual Corporate Code of Conduct 
certification process.  

In regards to overseeing and seeking to ensure that the Corporation consistently achieves strong environment, health, 
and safety (“EH&S”) performance, the GESC undertakes a number of actions that include: (i) receiving regular reports 
from  management  regarding  environmental  compliance,  trends,  and  TransAlta’s  responses;  (ii)  receiving  reports  and 
briefings on management’s initiatives with respect to changes in climate change legislation, policy developments as well 
as other draft initiatives and the potential impact such initiatives may have on our operations; (iii) assessing the impact of 
the  GHG    policies  implementation  and  other  legislative  initiatives  on  the  Corporation’s  business;  (iv)  reviewing  with 
management  the  EH&S  policies  of  the  Corporation;  (v)  reviewing  with  management  the  health  and  safety  practices 
implemented within the Corporation, as well as the evaluation and training processes put in place to address problem 
areas; (vi) receiving reports from management on the near-miss reporting program and discussing with management ways 
to improve the EH&S processes and practices; and (vi) reviewing the effectiveness of our response to EH&S issues and 
any new initiatives put in place to further improve the Corporation’s EH&S culture. 

The  HRC  is  empowered  by  the  Board  to  review  and  approve  key  compensation  and  human  resources  policies  of  the 
Corporation that are intended to attract, recruit, retain, and motivate employees of the Corporation. The HRC also makes 
recommendations to the Board regarding the compensation of the Corporation’s executive officers, including the review 
and  adoption  of  equity-based  incentive  compensation  plans,  the  adoption  of  human  resources  policies  that  support 
human rights and ethical conduct, and the review and approval of executive management succession and development 
plans.  

The responsibilities of other stakeholders within our risk management oversight structure are described below: 

The CEO and senior management review key risks quarterly. Specific Trading Risk Management reviews are held monthly 
by  the  Commodity  and  Compliance  Risk  Committee,  and  weekly  by  the  Managing  Director  Commodity  Risk,  the 
commercial managing directors in Trading and Marketing, and the Senior Vice-President Trading and Marketing. 

The  Investment  Committee  is  chaired  by  our  Chief  Legal  and  Compliance  Officer  and  Corporate  Secretary  and  is 
comprised of the CEO, Chief Financial Officer, Chief Legal and Compliance Officer and Corporate Secretary, and Chief 
Investment Officer. It reviews and approves all major capital expenditures including growth, productivity, life extensions, 
and major coal outages. Projects that are approved by the committee will then be put forward for approval by the Board, 
if required. 

The Commodity Risk & Compliance Committee is chaired by our Chief Financial Officer and is comprised of the Chief 
Financial Officer, Chief Legal and Compliance Officer and Senior Vice President, Energy Marketing.  It oversees the risk 
and compliance program in trading and ensures that this program is adequately resourced to monitor trading operations 
from a risk and compliance perspective. It also ensures the existence of appropriate controls,  processes,  systems and 
procedures to monitor adherence to policy.  

M81
TRANSALTA CORPORATION M81 

TransAlta Corporation    |    2017  Annual Integrated Report 
 
 
 
 
 
  
 
Management’s Discussion and Analysis

TransAlta  is  listed  on  the  Toronto  Stock  Exchange  (“TSX”)  and  the  New  York  Stock  Exchange  and  is  subject  to  the 
governance regulations, rules, and standards applicable under both exchanges. Our corporate governance practices meet 
the following governance rules of the TSX and Canadian Securities Administrators: (i) Multilateral Instrument 52-109 - 
Certification of Disclosure in Issuers’ Annual and Interim Filings; (ii) Multilateral Instrument 52-110 - Audit Committees; 
(iii)  National  Policy  58-201  -  Corporate  Governance  Guidelines;  and  (iv)  National  Instrument  58-101  -  Disclosure  of 
Corporate Governance Practices. As a “foreign private issuer” under US securities laws, we are generally permitted to 
comply with Canadian corporate governance requirements. Additional information regarding our governance practices 
can be found in our management proxy circular. 

Our risk controls have several key components: 
Risk Controls  
Enterprise Tone  
We strive to foster beliefs and actions that are true to, and respectful of, our many stakeholders. We do this by investing 
in communities where we live and work, operating and growing sustainably, putting safety first, and being responsible to 
the many groups and individuals with whom we work. 

Policies 
We maintain a comprehensive set of enterprise-wide policies. These policies establish delegated authorities and limits for 
business  transactions,  as  well  as  allow  for  an  exception  approval  process.  Periodic  reviews  and  audits  are  performed  to 
ensure compliance with these policies. All employees and directors are required to sign a code of conduct on an annual basis.  

Reporting  
On a regular basis, residual risk exposures are reported to key decision makers including the Board, senior management, 
and the Commodity Risk & Compliance Committee. Reporting to this committee includes analysis of new risks, monitoring 
of status to risk limits, review of events that can affect these risks, and discussion and review of the status of actions to 
minimize risks. This quarterly reporting provides for effective and timely risk management and oversight.   

Whistleblower System  
We have a process in place where employees, shareholders, or other stakeholders may anonymously report any potential 
ethical  concerns. These  concerns  can  be  submitted  confidentially  and  anonymously,  either  directly  to  the  ARC  or  to 
TransAlta’s Ethics Helpline. All complaints are investigated and the ARC receives a report at every scheduled committee 
meeting on all findings. If the findings are urgent, they will be reported to the Chair of the Board immediately. 

Value at Risk and Trading Positions  
Value at risk (“VaR”) is one of the primary measures used to manage our exposure to market risk resulting from commodity 
risk management activities. VaR is calculated and reported on a daily basis. This metric describes the potential change in 
the value of our trading portfolio over a three-day period within a 95 per cent confidence level, resulting from normal 
market fluctuations.  

VaR is a commonly used metric that is employed by industry to track the risk in commodity risk management positions and 
portfolios.  Two  common  methodologies  for  estimating  VaR  are  the  historical  variance/covariance  and  Monte  Carlo 
approaches.  We  estimate  VaR  using  the  historical  variance/covariance  approach.  An  inherent  limitation  of  historical 
variance/covariance VaR is that historical information used in the estimate may not be indicative of future market risk. Stress 
tests are performed periodically to measure the financial impact to the trading portfolio resulting from potential market 
events, including fluctuations in market prices, volatilities of those prices, and the relationships between those prices. We 
also  employ  additional  risk  mitigation  measures.  VaR  at  Dec.  31,  2017,  associated  with  our  proprietary  commodity  risk 
management activities was $5 million (2016 - $2 million). Refer to the Commodity Price Risk section of this MD&A for further 
discussion. 

M82
M82  TRANSALTA CORPORATION 

TransAlta Corporation    |    2017  Annual Integrated Report 
 
 
 
 
 
 
 
Management’s Discussion and Analysis

Risk is an inherent factor of doing business. The following section addresses some, but not all, risk factors that could affect 
Risk Factors 
our future results and our activities in mitigating those risks. These risks do not occur in isolation, but must be considered 
in conjunction with each other.  

For some risk factors we show the after-tax effect on net earnings of changes in certain key variables. The analysis is based 
on business conditions and production volumes in 2017. Each item in the sensitivity analysis assumes all other potential 
variables are held constant. While these sensitivities are applicable to the period and the magnitude of changes on which 
they  are  based,  they  may  not  be  applicable  in  other  periods,  under  other  economic  circumstances,  or  for  a  greater 
magnitude of changes. The changes in rates should also not be assumed to be proportionate to earnings in all instances. 

Volume Risk  
Volume risk relates to the variances from our expected production. For example, the financial performance of our Hydro, 
Wind, and Solar operations is partially dependent upon the availability of their input resources in a given year. Where we 
are unable to produce sufficient quantities of output in relation to contractually specified volumes, we may be required to 
pay penalties or purchase replacement power in the market. 

We manage volume risk by:  
▪ 

actively managing our assets and their condition in order to be proactive in plant maintenance so that our plants are 
available to produce when required; 

▪  monitoring water resources throughout Alberta to the best of our ability and optimizing this resource against real-

time electricity market opportunities; 
placing  our  facilities  in  locations  that  we  believe  to  have  adequate  resources  to  generate  electricity  to  meet  the 
requirements of our contracts. However, we cannot guarantee that these resources will be available when we need 
them or in the quantities that we require; and 
diversifying our fuels and geography as one way of mitigating regional or fuel-specific events. 

▪ 

▪ 

The sensitivity of volumes to our net earnings is shown below: 

Factor

Availability/production

Increase or 
decrease (%)

1

Approximate impact 
on net earnings 

12

Generation Equipment and Technology Risk   
There is a risk of equipment failure due to wear and tear, latent defect, design error or operator error, among other things, 
which could have a material adverse effect on the Corporation. Although our generation facilities have generally operated 
in accordance with expectations, there can be no assurance that they will continue to do so. Our plants are exposed to 
operational risks such as failures due to cyclic, thermal, and corrosion damage in boilers, generators, and turbines, and 
other issues that can lead to outages and increased volume risk. If plants do not meet availability or production targets 
specified in their PPA or other long-term contracts, we may be required to compensate the purchaser for the loss in the 
availability of production or record reduced energy or capacity payments. For merchant facilities, an outage can result in 
lost  merchant  opportunities.  Therefore,  an  extended  outage  could  have  a  material  adverse  effect  on  our  business, 
financial condition, results of operations, or our cash flows.  

As  well,  we  are  exposed  to  procurement  risk  for  specialized  parts  that  may  have  long  lead  times.  If  we  are  unable  to 
procure  these  parts  when  they  are  needed  for  maintenance  activities,  we  could  face  an  extended  period  where  our 
equipment is unavailable to produce electricity.  

We manage our generation equipment and technology risk by: 
▪ 

operating our generating facilities within defined and proven operating standards that are designed to maximize the 
availability of our generating facilities for the longest period of time; 
performing preventive maintenance on a regular basis; 
adhering to a comprehensive plant maintenance program and regular turnaround schedules; 
adjusting maintenance plans by facility to reflect the equipment type and age; 
having sufficient business interruption coverage in place in the event of an extended outage; 

▪ 
▪ 
▪ 
▪ 

M83
TRANSALTA CORPORATION M83 

TransAlta Corporation    |    2017  Annual Integrated Report 
 
 
 
                                     
 
 
 
 
Management’s Discussion and Analysis

having force majeure clauses in our thermal and other PPAs and other long-term contracts; 
using proven technology in our generating facilities; 

▪ 
▪ 
▪  monitoring  technological  advances  and  evaluating  their  impact  upon  our  existing  generating  fleet  and  related 

▪ 

▪ 

▪ 

maintenance programs; 
negotiating strategic supply agreements with selected vendors to ensure key components are available in the event 
of a significant outage; 
entering into long-term arrangements with our strategic supply partners to ensure availability of critical spare parts; 
and 
developing a long-term asset management strategy with the objective of maximizing the life cycles of our existing 
facilities and/or replacing of selected generating assets. 

Commodity Price Risk   
We have exposure to movements in certain commodity prices, including the market price of electricity and fuels used to 
produce electricity in both our electricity generation and proprietary trading businesses.  

We manage the financial exposure associated with fluctuations in electricity price risk by: 
entering into long-term contracts that specify the price at which electricity, steam, and other services are provided; 
▪ 
▪  maintaining  a  portfolio  of  short-,  medium-  and  long-term  contracts  to  mitigate  our  exposure  to  short-term 

fluctuations in commodity prices, 
purchasing natural gas coincident with production for merchant plants so spot market spark spreads are adequate 
to produce and sell electricity at a profit; and 
ensuring limits and controls are in place for our proprietary trading activities.  

▪ 

▪ 

In 2017, we had approximately 92 per cent (2016 - 88 per cent) of production under short-term and long-term contracts 
and  hedges.  In  the  event  of  a  planned  or  unplanned  plant  outage  or  other  similar  event,  however,  we  are  exposed  to 
changes in electricity prices on purchases of electricity from the market to fulfil our supply obligations under these short- 
and long-term contracts.  

We manage the financial exposure to fluctuations in the costs of fuels used in production by: 
▪ 
▪ 
▪ 

entering into long-term contracts that specify the price at which fuel is to be supplied to our plants, 
hedging emissions costs by entering into various emission trading arrangements, and 
selectively using hedges, where available, to set prices for fuel. 

In 2017, 57 per cent (2016 - 79 per cent) of our cost of gas used in generating electricity was contractually fixed or passed 
through to our customers and 100 per cent (2016 - 100 per cent) of our purchased coal costs were contractually fixed.  

Actual  variations  in  net  earnings  can  vary  from  calculated  sensitivities  and  may  not  be  linear  due  to  optimization 
opportunities, co-dependencies and cost mitigations, production, availability, and other factors.  

Coal Supply Risk  
Having sufficient fuel available when required for generation is essential to maintaining our ability to produce electricity 
under contracts and for merchant sale opportunities. At our coal-fired plants, input costs, such as diesel, tires, the price 
and  availability  of  mining  equipment,  the  volume  of  overburden  removed  to  access  coal  reserves,  rail  rates,  and  the 
location of mining operations relative to the power plants are some of the exposures in our operations. Additionally, the 
ability of the mines to deliver coal to the power plants can be impacted by weather conditions and labour relations. At US 
Coal, interruptions at our supplier’s mine, the availability of trains to deliver coal, and the financial viability of our coal 
suppliers could affect our ability to generate electricity.  

M84
M84  TRANSALTA CORPORATION 

TransAlta Corporation    |    2017  Annual Integrated Report 
 
 
 
 
 
 
 
Management’s Discussion and Analysis

We manage coal supply risk by: 
▪ 

ensuring that the majority of the coal used in electrical generation in Alberta is from reserves permitted through coal 
rights  we  have  purchased  or  for  which  we  have  long-term  supply  contracts,  thereby  limiting  our  exposure  to 
fluctuations in the supply of coal from third parties; 
using longer-term mining plans to ensure the optimal supply of coal from our mines; 
sourcing the majority of the coal used at US Coal under a mix of short-, medium-, and long-term contracts and from 
multiple mine sources to ensure sufficient coal is available at a competitive cost; 
contracting sufficient trains to deliver the coal requirements at U.S. Coal; 
ensuring coal inventories on hand at Canadian Coal and US Coal are at appropriate levels for usage requirements; 
ensuring efficient coal handling and storage facilities are in place so that the coal being delivered can be processed in 
a timely and efficient manner;  

▪  monitoring and maintaining coal specifications, carefully matching the specifications mined with the requirements of 

our plants; 

▪  monitoring the financial viability of US coal suppliers; and 
▪ 

hedging diesel exposure in mining and transportation costs. 

Environmental Compliance Risk 
Environmental  compliance  risks  are  risks  to  our  business  associated  with  existing  and/or  changes  in  environmental 
regulations. New emission reduction objectives for the power sector are being established by governments in Canada 
(including as set forth in the Alberta CLP) and the US We anticipate continued and growing scrutiny by investors relating 
to sustainability  performance.  These changes to regulations  may affect our earnings by  reducing the operating  life of 
generating  facilities,  imposing  additional costs on the generation of electricity,  such as emission caps  or  tax,  requiring 
additional capital investments in emission capture technology, or requiring us to invest in offset credits. It is anticipated 
that these compliance costs will increase due to increased political and public attention to environmental concerns. 

We manage environmental compliance risk by: 
▪ 

seeking  continuous  improvement  in  numerous  performance  metrics  such  as  emissions,  safety,  land  and  water 
impacts, and environmental incidents; 
having an International Organization for Standardization and Occupational Health and Safety Assessment Series-
based  environmental  health  and  safety  management  system  in  place  that  is  designed  to  continuously  improve 
performance; 
committing  significant  experienced  resources  to  work  with  regulators  in  Canada  and  the  US  to  advocate  that 
regulatory changes are well designed and cost effective; 
developing compliance plans that address how to meet or surpass emission standards for GHGs, mercury, SO2, and 
NOx, which will be adjusted as regulations are finalized; 
purchasing emission reduction offsets; 
investing in renewable energy projects, such as wind, solar, and hydro generation,;and 
incorporating  change-in-law  provisions  in  contracts  that  allow  recovery  of  certain  compliance  costs  from  our 
customers. 

We strive to be in compliance with all environmental regulations relating to operations and facilities. Compliance with 
both  regulatory  requirements  and  management  system  standards  is  regularly  audited  through  our  performance 
assurance policy and results are reported quarterly to the GESC. 

Credit Risk  
Credit risk  is the risk to our business  associated  with  changes in  the creditworthiness of  entities with  which we have 
commercial  exposures.  This  risk  results  from  the  ability  of  a  counterparty  to  either  fulfil  its  financial  or  performance 
obligations to us or where we have made a payment in advance of the delivery of a product or service. The inability to 
collect cash due to us or to receive products or services may have an adverse impact upon our net earnings and cash flows. 

We manage our exposure to credit risk by: 
▪ 

establishing  and  adhering  to  policies  that  define  credit  limits  based  on  the  creditworthiness  of  counterparties, 
contract term limits, and the credit concentration with any specific counterparty; 
requiring formal sign-off on contracts that include commercial, financial, legal, and operational reviews; 
requiring security instruments, such as parental guarantees, letters of credit, and cash collateral that can be collected 

▪ 
▪ 

▪ 
▪ 
▪ 

▪ 

▪ 

▪ 

▪ 
▪ 
▪ 

▪ 
▪ 

TRANSALTA CORPORATION M85 
M85

TransAlta Corporation    |    2017  Annual Integrated Report 
 
 
 
 
Management’s Discussion and Analysis

▪ 

if a counterparty fails to fulfil its obligation or goes over its limits; and 
reporting  our  exposure  using  a  variety  of  methods  that  allow  key  decision-makers  to  assess  credit  exposure  by 
counterparty. This reporting allows us to assess credit limits for counterparties and the mix of counterparties based 
on their credit ratings. 

If established credit exposure limits are exceeded, we take steps to reduce this exposure, such as by requesting collateral, 
if applicable, or by halting commercial activities with the affected counterparty. However, there can be no assurances that 
we will be successful in avoiding losses as a result of a contract counterparty not meeting its obligations. 

Our credit risk management profile and practices have not changed materially from Dec. 31, 2016. We had no material 
counterparty losses in 2017. We continue to keep a close watch on changes and trends in the market and the impact these 
changes could have on our energy trading business and hedging activities, and will take appropriate actions as required, 
although no assurance can be given that we will always be successful. 

The following table outlines our maximum exposure to credit risk without taking into account collateral held or right of 
set-off, including the distribution of credit ratings, as at Dec. 31, 2017: 

1

Trade and other receivables(1)

Long-term finance lease receivables
Risk management assets(1)
Loan receivable(2)

Total

Investment grade
(Per cent)

Non-investment grade
(Per cent)

Total
(Per cent)

87

96

-

-

13

4

100

100

100

100

100

100

Total
amount

933

215

899

33

2,080

The maximum credit exposure to any one customer for commodity trading operations, including the fair value of open 
trading positions net of any collateral held, is $40 million (2016 - $14 million).  

Currency Rate Risk  
We have exposure to various currencies as a result of our investments and operations in foreign jurisdictions, the  cash 
flows  from  those  operations,  the  acquisition  of  equipment  and  services  and  foreign-denominated  commodities  from 
foreign  suppliers,  and  our  US  denominated  debt.  Our  exposures  are  primarily  to  the  US  and  Australian  currencies. 
Changes in the values of these currencies in relation to the Canadian dollar may affect our cash flows or the value of our 
foreign investments to the extent that these positions or cash flows are not hedged or the hedges are ineffective.   

We manage our currency rate risk by establishing and adhering to policies that allow for both designated hedges and 
economic hedges and include: 
▪ 
▪ 

hedging our net investments in US operations using US-denominated debt; 
entering into forward foreign exchange contracts to hedge future foreign denominated expenditures including our  
US-denominated debt that is outside the net investment portfolio; and 
hedging our expected foreign operating cash flows. Our target is to hedge a minimum of 60 per cent of our forecasted 
foreign operating cash flows over a four-year period, with a minimum of 90 per cent in the current year, 70 per cent 
in the next year, 50 per cent in the third year, and 30 per cent in the fourth year. The U.S. exposure will be managed 
with a combination of interest expense on our US-dollar-denominated debt and forward foreign exchange contracts; 
the Australian exposure will be managed with forward foreign exchange contracts.  

▪ 

The  sensitivity  of  our  net  earnings  to  changes  in  foreign  exchange  rates  has  been  prepared  using  management’s 
assessment that an average four cent increase or decrease in the US or Australian currencies relative to the Canadian 
dollar is a reasonable potential change over the next quarter, and is shown below: 

(1)  Letters of credit and cash and cash equivalents are the primary types of collateral held as security related to these amounts. 
(2) Counterparty has no external credit rating. Excludes $5 million current portion classified in trade and receivables.

M86
M86  TRANSALTA CORPORATION 

TransAlta Corporation    |    2017  Annual Integrated Report 
 
 
                   
                   
                   
                      
               
 
 
 
 
 
                                                 
Management’s Discussion and Analysis

Factor

Exchange rate

Increase or decrease 

$0.04

Approximate impact 
on net earnings

12

Liquidity Risk  
Liquidity risk relates to our ability to access capital to be used to engage in trading and hedging activities, capital projects, 
debt refinancing and payment of liabilities, capital structure,  and general corporate purposes. Investment grade credit 
ratings support these activities and provide a more reliable and cost-effective means to access capital markets through 
commodity and credit cycles. Changes in credit ratings may also affect our ability and/or the cost of establishing normal 
course derivative or hedging transactions, including those undertaken by our Energy Marketing segment. Counterparties 
enter  into  certain  electricity  and  natural  gas  purchase  and  sale  contracts  for  the  purposes  of  asset-backed  sales  and 
proprietary trading. The terms and conditions of these contracts require the counterparties to provide collateral when 
the  fair  value  of  the  obligation  pursuant  to  these  contracts  is  in  excess  of  any  credit  limits  granted. Downgrades  in 
creditworthiness by certain credit rating agencies may challenge our ability to enter into these contracts or any ordinary 
course contract, decrease the credit limits granted, and increase the amount of collateral that may have to be provided. 
Certain  existing  contracts  contain  credit  rating  contingent  clauses,  that,  when  triggered,  automatically  increase  costs 
under the contract or require additional collateral to be posted.  Where the contingency  is based  on the lowest single 
rating,  a  one-level  downgrade  from  a  credit  rating  agency  with  an  originally  higher  rating  may  not,  however,  trigger 
additional direct adverse impact. 

We are focused on strengthening our financial position and flexibility and achieving stable investment grade credit ratings 
with rating agencies. Credit ratings issued for TransAlta, as well as the corresponding rating agency outlooks, are set out 
in the Financial Capital section of this MD&A. Credit ratings are subject to revision or withdrawal at any time by the rating 
organization,  and there can be no assurance that TransAlta’s credit ratings and the corresponding outlook will not  be 
changed, resulting in the adverse possible impacts identified above.  

As at Dec. 31, 2017, we have liquidity of $1.6 billion comprised of amounts not drawn under our committed credit facilities 
and cash on hand. 

We manage liquidity risk by: 
▪  monitoring liquidity on trading positions; 
▪ 

preparing and revising longer-term financing plans to reflect changes in business plans and the market availability of 
capital;  
reporting liquidity risk exposure for commodity risk management activities on a regular basis to the Commodity Risk 
& Compliance Committee, senior management and the ARC; 

▪ 

▪  maintaining investment grade credit ratings; and 
▪  maintaining sufficient undrawn committed credit lines to support potential liquidity requirements.  

Interest Rate Risk  
Changes in interest rates can impact our borrowing costs and the capacity revenues we receive from our Alberta PPA 
plants.  Changes in our cost of capital may also affect the feasibility of new growth initiatives. 

We manage interest rate risk by establishing and adhering to policies that include: 
employing a combination of fixed and floating rate debt instruments; and 
▪ 
▪  monitoring the mixture of floating and fixed rate debt and adjusting where necessary to ensure a continued efficient 

mixture of these types of debt. 

At Dec. 31, 2017, approximately six per cent (2016 - six per cent) of our total debt portfolio was subject to changes in 
floating interest rates through a combination of floating rate debt and interest rate swaps. 

The sensitivity of changes in interest rates upon our net earnings is shown below: 

M87
TRANSALTA CORPORATION M87 

TransAlta Corporation    |    2017  Annual Integrated Report                                     
 
 
 
 
 
 
 
 
 
Management’s Discussion and Analysis

Factor

Interest rate   

Increase or 
decrease (%)

0.15

Approximate impact 
on net earnings

-

Project Management Risk  
On capital projects, we face risks associated with cost overruns, delays, and performance.  

We manage project risks by: 
▪ 

ensuring  all  projects  are  reviewed  to  see  that  established  processes  and  policies  are  followed,  risks  have  been 
properly identified and quantified, input assumptions are reasonable, and returns are realistically forecasted prior to 
senior management and Board of Directors approvals; 
using consistent and disciplined project management methodologies and processes; 
performing detailed analysis of project economics prior to construction or acquisition and by determining our asset 
contracting strategy to ensure the right mix of contracted and merchant capacity before starting construction; 
partnering with those who have previously been able to deliver projects economically and on budget; 
developing and following through with comprehensive plans that include critical paths identified, key delivery points, 
and backup plans; 

▪ 
▪ 

▪ 
▪ 

▪  managing project closeouts so that any learnings from the project are incorporated into the next significant project; 
fixing the price and availability of the equipment, foreign currency rates, warranties, and source agreements as much 
▪ 
as is economically feasible prior to proceeding with the project; and 
entering into labour agreements to provide security around cost and productivity. 

▪ 

Human Resource Risk  
Human resource risk relates to the potential impact upon our business as a result of changes in the workplace. Human 
resource risk can occur in several ways: 
▪ 
▪ 
▪ 
▪ 
▪ 

potential disruption as a result of labour action at our generating facilities; 
reduced productivity due to turnover in positions; 
inability to complete critical work due to vacant positions; 
failure to maintain fair compensation with respect to market rate changes; and 
reduced  competencies  due  to  insufficient  training,  failure  to  transfer  knowledge  from  existing  employees,  or 
insufficient expertise within current employees. 

We manage this risk by: 
▪  monitoring industry compensation and aligning salaries with those benchmarks; 
using incentive pay to align employee goals with corporate goals; 
▪ 
▪  monitoring and managing target levels of employee turnover; and 
▪ 

ensuring new employees have the appropriate training and qualifications to perform their jobs. 

In  2017,  52  per  cent  (2016  -  53  per  cent)  of  our  labour  force  was  covered  by  11  (2016  -  11)  collective  bargaining 
agreements. In 2017, four (2015 - five) agreements were renegotiated. We anticipate the successful negotiation of four 
collective agreements in 2018.  

Regulatory and Political Risk  
Regulatory  and  political  risk  is  the  risk  to  our  business  associated  with  potential  changes  to  the  existing  regulatory 
structures and the political influence upon those structures. This risk can come from market regulation and re-regulation, 
increased oversight and control, structural or design changes in markets, or other unforeseen influences. Market rules are 
often dynamic and we are not able to predict whether there will be any material changes in the regulatory environment 
or the ultimate effect of changes in the regulatory environment on our business. This risk includes, among other things, 
uncertainties associated with the development of capacity markets for electricity in the provinces of Alberta and Ontario, 
uncertainties associated with the development of carbon pricing policies, the qualification of our renewable facilities in 
Alberta to the generation of tradable GHG allowances as part of the transition from the Specified Gas Emitters Regulation 
to new regulation to be formulated to give effect to the Alberta CLP in 2018, as well as the influence of regulation on the 
value of allowances or credits generated. 

M88
M88  TRANSALTA CORPORATION 

TransAlta Corporation    |    2017  Annual Integrated Report 
                                   
 
 
 
 
 
 
 
Management’s Discussion and Analysis

We manage these risks systematically through our Legal and Regulatory groups and our Compliance program, which is 
reviewed periodically to ensure its effectiveness. We work with governments, regulators, electricity system operators, 
and other stakeholders to resolve issues as they arise. We are actively monitoring changes to market rules and market 
design, and we engage in market-sponsored stakeholder engagement processes. Through these and other avenues, we 
engage in advocacy and policy discussions at a variety of levels. These stakeholder negotiations have allowed us to engage 
in proactive discussions with governments over the longer term.  

International  investments  are  subject  to  unique  risks  and  uncertainties  relating  to  the  political,  social,  and  economic 
structures of the respective country and the country’s regulatory regime. We mitigate this risk through the use of non-
recourse financing and insurance. 

Transmission Risk  
Access to transmission lines and transmission capacity for existing and new generation are key in our ability to deliver 
energy  produced  at  our  power  plants  to  our  customers.  The  risks  associated  with  the  aging  existing  transmission 
infrastructure in markets in which we operate continue to increase because new connections to the power system are 
consuming transmission capacity quicker than it is being added by new transmission developments. 

Reputation Risk  
Our reputation is one of our most valued assets. Reputation risk relates to the risk associated with our business because 
of changes in opinion from the general public, private stakeholders, governments, and other entities.  

We manage reputation risk by: 
▪ 

striving as a neighbour and business partner in the regions where we operate to build viable relationships based on 
mutual understanding leading to workable solutions with our neighbours and other community stakeholders; 
clearly communicating our business objectives and priorities to a variety of stakeholders on a routine basis; 

▪ 
▪  maintaining positive relationships with various levels of government; 
▪ 
▪ 
▪ 
▪  maintaining strong corporate values that support reputation risk management initiatives. 

pursuing sustainable development as a longer-term corporate strategy; 
ensuring that each business decision is made with integrity and in line with our corporate values; 
communicating the impact and rationale of business decisions to stakeholders in a timely manner; and 

Corporate Structure Risk  
We conduct a significant amount of business through subsidiaries and partnerships. Our ability to meet and service debt 
obligations is dependent upon the results of operations of our subsidiaries and the payment of funds by our subsidiaries 
in the form of distributions, loans, dividends, or otherwise. In addition, our subsidiaries may be subject to statutory or 
contractual restrictions that limit their ability to distribute cash to us.  

Cybersecurity Risk 
We rely on our information technology to process, transmit and store electronic information, including information we 
use to safely operate our assets. Cyberattacks or other breaches of network or information technology systems security 
may  cause  disruptions  to  our operations.  Cyberattackers  may  use  a  range  of  techniques,  from  manipulating people  to 
using  sophisticated  malicious  software  and  hardware  on  a  single  or  distributed  basis.  Some  cyberattackers  use  a 
combination  of  techniques  in  their  attempt  to  evade  safeguards  such  as  firewalls,  intrusion  prevention  systems,  and 
antivirus software found in our systems and networks. A successful attack on our systems, networks, and infrastructure 
may  allow  for  the  unauthorized  interception,  destruction,  use,  or  dissemination  of  our  information  and  may  cause 
disruptions to our operations.  

We  take  measures  to  secure  our  infrastructure  against  potential  cyberattacks  that  may  damage  our  infrastructure, 
systems and data. Our cybersecurity program aligns with industry best practices to  ensure that a holistic approach to 
security is maintained. We have implemented security controls to help secure our data and business operations, including 
access control measures, intrusion detection and prevention systems, logging and monitoring of network activities, and 
implementing policies and procedures to ensure the secure operations of the business.  

TRANSALTA CORPORATION M89 

M89

TransAlta Corporation    |    2017  Annual Integrated Report 
 
 
 
 
 
 
 
 
 
 
Management’s Discussion and Analysis

While we have systems, policies, hardware, practices, data backups, and procedures designed to prevent or limit the effect 
of the security breaches of our generation facilities and infrastructure, there can be no assurance that these measures will 
be sufficient and that such security breaches will not occur or, if they do occur, that they will be adequately addressed in 
a timely manner.  We closely monitor both preventive and detective measures to manage these risks. 

General Economic Conditions  
Changes  in  general  economic  conditions  impact  product  demand,  revenue,  operating  costs,  the  timing  and  extent  of 
capital expenditures, the net recoverable value of PP&E, financing costs, credit and liquidity risk, and counterparty risk. 

Income Taxes  
Our operations are complex and located in several countries. The computation of the provision for income taxes involves 
tax  interpretations,  regulations,  and  legislation  that  are  continually  changing.  Our  tax  filings  are  subject  to  audit  by 
taxation authorities. Management believes that it has adequately provided for income taxes as required by IFRS, based 
on all information currently available.  

The Corporation is subject to changing laws, treaties, and regulations in and between countries. Various tax proposals in 
the countries we operate in could result in changes to the basis on which deferred taxes are calculated or could result in 
changes  to  income  or  non-income  tax  expense.  There  has  recently  been  an  increased  focus  on  issues  related  to  the 
taxation of multinational corporations. A change in tax laws, treaties, or regulations, or in the interpretation thereof, could 
result  in  a  materially  higher  income  or  non-income  tax  expense  that  could  have  a  material  adverse  impact  on  the 
Corporation.  

On  Dec.  22,  2017,  the  US  government  enacted  H.R.1,  originally  known  as  the  Tax  Cuts  and  Jobs  Act,  which  includes 
legislation  to  decrease  its  federal  corporate  income  tax  rate  from  35  per  cent  to  21  per  cent.  The  Corporation's  net 
deferred tax liability associated with its directly owned US operations is made up of a deferred tax asset and a deferred 
tax liability that net to $6 million. The decrease in the US federal corporate income tax rate resulted in a decrease to the 
deferred  tax  asset of $104 million,  all of which is recorded as deferred  tax  expense in  the  Consolidated Statement of 
Earnings, offset by a decrease to the deferred tax liability of $110 million, of which $1 million is recorded as deferred tax 
expense in the Consolidated Statement of Earnings with an offsetting $111 million deferred tax recovery recorded in the 
Consolidated Statement of Other Comprehensive Income.  

The sensitivity of changes in income tax rates upon our net earnings is shown below: 

Factor

Tax rate

Increase or 
decrease (%)

1

Approximate impact 
on net earnings

1

Legal Contingencies  
We are occasionally named as a party in various claims and legal  regulatory proceedings that arise during the normal 
course of our business. We review each of these claims, including the nature of the claim, the amount in dispute or claimed, 
and the availability of insurance coverage.  There can be no assurance that any particular claim  or proceedings  will be 
resolved in our favour or that such claims may not have a material adverse effect on us.  

Other Contingencies  
We maintain a level of insurance coverage deemed appropriate by management. There were no significant changes to our 
insurance  coverage  during  renewal  of  the  insurance  policies  on  December  31.  Our  insurance  coverage  may  not  be 
available in the future on commercially reasonable terms. There can be no assurance that our insurance coverage will be 
fully adequate to compensate for potential losses incurred. In the event of a significant economic event, the insurers may 
not be capable of fully paying all claims. 

M90
M90  TRANSALTA CORPORATION 

TransAlta Corporation    |    2017  Annual Integrated Report 
 
 
 
 
 
                                        
 
 
Fourth Quarter 
Three months ended Dec. 31
Consolidated Financial Highlights 
Revenues 

Net earnings (loss) attributable to common shareholders

Cash flow from operating activities
Comparable EBITDA(1)
FFO(1)
FCF(1)

Net earnings (loss) per share attributable to common 
  shareholders, basic and diluted
FFO per share(1)
FCF per share(1)

Dividends declared per common share 

1 

Management’s Discussion and Analysis

2017

638

(145)

81

275

219

101

(0.50)

0.76

0.35

0.04

2016

717

61

122

374

200

62

0.21

0.69

0.22

0.08

We delivered better than anticipated results in the fourth quarter with FCF of $101 million, up $39 million over the same 
Financial Highlights 
period last year. We recorded FFO of $219 million, up $19 million over the fourth quarter of 2016, as the business delivered 
a solid performance.  

Net loss attributable to  common shareholders in the fourth quarter of 2017 was $145 million ($0.50 net loss per share) 
compared to net earnings of $61 million ($0.21 net earnings per share) in the same period of 2016, down over $200 million 
compared to last year. This was driven by lower comparable EBITDA ($101 million pre-tax) and the impact of the US tax rate 
reduction  ($105  million).  Last  year,  net  earnings  also  included  a  one-time  gain  of  $48  million  (net  of  related  income  tax 
expense and non-controlling interest) for the Mississauga recontracting. 

Segmented Cash Flows and operational performance for the business during the quarter is as follows: 
Segmented Cash Flows Generated by the Business and Operational Performance
Three months ended Dec. 31
Availability (%)(2)
Adjusted availability (%)(3)
Production (GWh)(2)

2017

88.4

88.4

(1)

10,374

Segmented cash inflow (outflow)
  Canadian Coal
  US Coal
  Canadian Gas
  Australian Gas
  Wind and Solar
  Hydro
Generation cash inflow 
  Energy Marketing
  Corporate 
Total comparable cash inflow

11
15
56
27
73
10
192
15
(28)
179

2016

88.9

88.9

10,624

36
16
75
24
64
9
224
(11)
(28)
185

(1)  These items are not defined under IFRS. Presenting these items from period to period provides management and investors with the ability to evaluate earnings trends 
more readily in comparison with prior periods’ results. Refer to the Comparable Funds from Operations and Comparable Free Cash Flow and Earnings on a Comparable 
Basis sections of this MD&A for further discussion of these items, including, where applicable, reconciliations to measures calculated in accordance with IFRS. 

(2)  Availability  and  production  includes  all  generating  assets  under  generation  operations  that  we  operate  and  finance  leases  and  excludes  hydro  assets  and  equity 

investments.  Production includes all generating assets, irrespective of investment vehicle and fuel type. 

(3) Adjusted for economic dispatching at US Coal. 

TRANSALTA CORPORATION M91 

M91

TransAlta Corporation    |    2017  Annual Integrated Report 
                 
                 
                
                    
                    
                 
                 
                 
                 
                 
                 
                    
               
                
                
                
                
                
                
                
 
 
 
 
 
                           
                           
                           
                           
                     
                     
                               
                               
                               
                               
                               
                               
                               
                               
                               
                               
                               
                                  
                            
                            
                               
                             
                             
                             
                            
                            
 
 
                                                 
Management’s Discussion and Analysis

Segmented  cash  flows  generated  by  the  business  measures  the  net  cash  generated  by  each  of  our  segments  after 
sustaining and productivity capital  expenditures,  reclamation costs and provisions.  It also excludes non-cash mark-to-
market  gains  or  losses.  This  is  the  cash  flows  available  to  pay  our  interest  and  cash  taxes,  distributions  to  our  non-
controlling partners and dividends to our preferred shareholders, grow the business, pay down debt and return capital to 
our shareholders.  

Adjusted availability for the three months ended Dec. 31, 2017, was comparable with the same period in 2016.  

Lower production for the three months ended Dec. 31, 2017, compared to the same period in 2016, is primarily due to higher 
outages  and derates  at our Canadian  Coal segment,  the  Mississauga recontracting in 2016,  and lower resources at Hydro, 
partially offset with lower economic dispatching caused by higher price at our US Coal business, stronger wind resources in 
Canada, and the commissioning of the South Hedland Power Station in the third quarter of 2017. 

Cash flows generated by the business totalled $179 million in the fourth quarter, in line with last year’s performance.  

We evaluate our performance and the performance of our business segments using a variety of measures. Comparable 
figures are not defined under IFRS. Those discussed below, and elsewhere in this MD&A, are not defined under IFRS and, 
Discussion of Consolidated Financial Results
therefore,  should  not  be  considered  in  isolation  or  as  an  alternative  to  or  to  be  more  meaningful  than  net  earnings 
attributable to common shareholders or cash flow from operating activities, as determined in accordance with IFRS, when 
assessing  our  financial  performance  or  liquidity.  These  measures  are  not  necessarily  comparable  to  a  similarly  titled 
measure  of  another  company.  Each  business  segment  assumes  responsibility  for  its  operating  results  measured  to 
comparable  EBITDA  and  cash  flows  generated  by  the  business.  Gross  margin  is  also  a  useful  measure  as  it  provides 
management  and  investors  with  a  measurement  of  operating  performance  that  is  readily  comparable  from  period  to 
period.  

M92
M92  TRANSALTA CORPORATION 

TransAlta Corporation    |    2017  Annual Integrated Report 
 
 
 
 
 
Management’s Discussion and Analysis

1

A  reconciliation  of  net  earnings  (loss)  attributable  to  common  shareholders  to  comparable  EBITDA  results  is  set  out 
Comparable EBITDA
below: 

Three months ended Dec. 31

Net earnings (loss) attributable to common shareholders

      Net earnings attributable to non-controlling interests

      Preferred share dividends

Net earnings (loss) 

Adjustments to reconcile net income to comparable EBITDA

      Income tax expense

      Gain on sale of assets and other

      Foreign exchange (gain) loss

      Net interest expense

      Depreciation and amortization

Comparable reclassifications

      Decrease in finance lease receivables 

      Mine depreciation included in fuel cost

      Australian interest income

Adjustments to earnings to arrive at comparable results
      Impacts to revenue associated with certain 
        de-designated and economic hedges
      Impacts associated with Mississauga recontracting(1)

      Asset impairment charge

Comparable EBITDA

2017

(145)

19

10

(116)

105

(1)

(6)

57

180

15

20

1

-

20

-

275

2016

61

90

20

171

82

(3)

3

47

187

15

19

-

2

(177)

28

374

A summary of our comparable EBITDA by segments for the three months ended Dec. 31, 2017 and 2016 is as follows: 

Three months ended Dec. 31

Comparable EBITDA

  Canadian Coal

  US Coal

  Canadian Gas

  Australian Gas

  Wind and Solar

  Hydro

  Energy Marketing

  Corporate 

Total comparable EBITDA

2017

2016

66

21

62

29

78

14

25

(20)

275

178

14

70

32

66

20

13

(19)

374

Comparable EBITDA decreased by $99 million for the fourth quarter 2017, compared to 2016. Our Canadian Coal results 
were down $112 million mainly due to the inclusion of the $80 million reversal of the Keephills 1 provision in 2016, higher 
coal  costs  caused  by  a  higher  strip  ratio  and  lower  equipment  availability  at  our  mine,  and  higher  environmental 
compliance  costs  in  2017.  This  was  partly  offset  by  the  OCA  payments.  Lower  prices  due  to  the  rolling  off  of  certain 
hedges also negatively  impacted Canadian Coal’s results. Energy Marketing’s comparable  EBITDA was up $12 million 
during  the  fourth  quarter  of  2017  compared  to  2016  due  to  a  return  to  a  normalized  level  and  solid  performance  in 
Alberta and Western US. Wind and Solar generated an increase of $12 million comparable EBITDA period-over-period 
mainly  due  to  higher  volumes  at  contracted  facilities  and  lower cost  of  sales  from  renewable  energy  certificates.  Our 
Canadian Gas business was down $8 million period-over-period due to unfavourable mark-to-market in gas contracts 
that do not qualify for hedge accounting. Lower resources at certain hydro facilities resulted in lower comparable EBITDA 
by $6 million period-over-period.  

 (1) Impacts associated with Mississauga recontracting for the three months ended Dec. 31, 2017, are as follows: revenue ($29 million) and recovery related to renegotiated 
land lease ($9 million). Impacts associated with Mississauga recontracting for the three months ended Dec. 31, 2016, are as follows: net other operating income ($191 
million) and fuel and purchased power and de-designated hedges ($14 million).

TRANSALTA CORPORATION M93 
M93

TransAlta Corporation    |    2017  Annual Integrated Report 
                   
                       
                       
                       
                       
                       
                   
                    
                    
                       
                         
                         
                         
                          
                       
                       
                    
                    
                       
                       
                       
                       
                          
                            
                           
                          
                       
                   
                           
                       
                    
                    
 
 
                               
                            
                               
                               
                               
                               
                               
                               
                               
                               
                               
                               
                               
                               
                             
                             
                            
                            
 
                                                 
Management’s Discussion and Analysis

Funds from Operations and Free Cash Flow 
FFO  per  share  and  FCF  per  share  are  calculated  as  follows  using  the  weighted  average  number  of  common  shares 
outstanding during the period. 

The table below reconciles our cash flow from operating activities to our FFO and FCF.. 

Three months ended Dec. 31

Cash flow from operating activities

Change in non-cash operating working capital balances

Cash flow from operations before changes in working capital

Adjustments:

Decrease in finance lease receivable

    Other 

FFO

Deduct:

Sustaining capital 

Productivity capital 

Dividends paid on preferred shares

Distributions paid to subsidiaries' non-controlling interests

Other 

FCF

Weighted average number of common shares 
  outstanding in the period

FFO per share

FCF per share

 2017 

 2016 

81

121

202

15

2

219

(62)

(9)

(10)

(36)
(1)

101

288

0.76

0.35

122

61

183

15

2

200

(85)

(2)

(10)

(40)
(1)

62

288

0.69

0.22

FFO was up $19 million during the fourth quarter of 2017 compared to the same period in 2016.  FCF increased by $39 
million period-over-period as we continued to reduce our sustaining capital resulting from our announcement in April 
2017 to mothball certain Sundance units. 

M94
M94  TRANSALTA CORPORATION 

TransAlta Corporation    |    2017  Annual Integrated Report 
 
                            
                           
                         
                              
                         
                           
                            
                              
                               
                                 
                         
                           
                          
                             
                             
                                
                          
                             
                          
                             
                             
                                
                         
                              
                         
                           
                        
                          
                        
                          
 
 
 
The table below bridges our comparable EBITDA to our FFO and FCF. 

Management’s Discussion and Analysis

Three months ended Dec. 31

Comparable EBITDA

Provisions

Unrealized (gains) losses from risk management activities

Interest expense

Current income tax expense 

Decommissioning and restoration costs settled

Realized foreign exchange gain (loss)

Other 

FFO

Deduct:

Sustaining capital 

Productivity capital 

Dividends paid on preferred shares

Distributions paid to subsidiaries' non-controlling interests

Other

FCF

Weighted average number of common shares 
  outstanding in the period

FFO per share

FCF per share

 2017 

275

(10)

(8)

(52)

(6)

(7)

8

19

219

(62)

(9)

(10)

(36)

(1)

101

288

0.76

0.35

 2016 

374

(104)

16

(52)

(6)

(8)

(3)

(17)

200

(85)

(2)

(10)

(40)

(1)

62

288

0.69

0.22

M95
TRANSALTA CORPORATION M95 

TransAlta Corporation    |    2017  Annual Integrated Report 
                         
                           
                          
                          
                             
                              
                          
                             
                             
                                
                             
                                
                               
                                
                            
                             
                         
                           
                          
                             
                             
                                
                          
                             
                          
                             
                             
                                
                         
                              
                         
                           
                        
                          
                        
                          
 
 
Management’s Discussion and Analysis

Our results are seasonal due to the nature of the electricity market and related fuel costs. Higher maintenance costs are 
usually  incurred  in  the  spring  and  fall  when  electricity  prices  are  expected  to  be  lower,  as  electricity  prices  generally 
Selected Quarterly Information
increase in the peak winter and summer months in our main markets due to increased heating and cooling loads. Margins 
are also typically impacted in the second quarter due to the volume of hydro production resulting from spring runoff and 
rainfall in the Pacific Northwest, which impacts production at US Coal. Typically, hydro facilities generate most of their 
electricity and  revenues during the spring months when melting snow starts feeding watersheds and rivers. Inversely, 
wind speeds are historically greater during the cold winter months and lower in the warm summer months.  
1 

Revenues

Comparable EBITDA

FFO

Net loss attributable to common shareholders

Net loss per share attributable to common shareholders, 
  basic and diluted(1)

Revenues

Comparable EBITDA

FFO

Net earnings (loss) attributable to common shareholders

Net earnings (loss) per share attributable to common shareholders, 
   basic and diluted(1)

Q1 2017

Q2 2017

Q3 2017

Q4 2017

578

274

202

-

-

503

268

187

(18)

588

245

196

(27)

(0.06)

(0.09)

638

275

219

(145)

(0.50)

Q1 2016

Q2 2016

Q3 2016

Q4 2016

568

279

196

62

0.22

492

248

175

6

620

243

163

(12)

0.02

(0.04)

717

374

228

61

0.21

(1) Basic and diluted earnings per share attributable to common shareholders and comparable earnings per share are calculated each period using the weighted average 
number of common shares outstanding during the period. As a result, the sum of the earnings per share for the four quarters making up the calendar year may sometimes 
differ from the annual earnings per share. 

M96
M96  TRANSALTA CORPORATION 

TransAlta Corporation    |    2017  Annual Integrated Report 
              
                   
                  
                   
              
                   
                  
                   
              
                   
                  
                   
                     
                    
                   
                  
                     
                
               
                 
              
                   
                  
                   
              
                   
                  
                   
              
                   
                  
                   
                 
                         
                   
                      
             
                  
               
                  
 
 
                                                 
Reported net earnings, comparable EBITDA and FFO are generally higher in the first and fourth quarters due to higher demand 
associated with winter cold in the markets in which we operate and lower planned outages.   

Management’s Discussion and Analysis

Net earnings attributable to common shareholders has also been impacted by the following variations and events: 
gain on disposal of assets, following the Poplar Creek contract restructuring in the third quarter of 2015; 
▪ 
▪  US Solar and Wind acquisitions in the third quarter of 2015; 
▪ 
▪ 

settlement with the Market Surveillance Administrator in the third quarter of 2015; 
a recovery of a writedown of deferred tax assets in the third quarter of 2015, and the first and second quarters of 
2016, and the second quarter of 2017; 
change  in  income  tax  rates  in  Alberta  and  the  U.S.  in  the  second  quarter  of  2015,  and  fourth  quarter  of  2017, 
respectively; 
deferred income tax impacts of the sale of an economic interest in Australian Assets to TransAlta Renewables in the 
first and second quarters of 2015; 
effects of non-comparable unrealized losses on intercompany financial instruments that are attributable only to the  
non-controlling interests in the first, second, and third quarters of 2016, and unrealized gains in the first quarter of 
2017; 
effects of the Keephills 1 outage provision in the fourth quarter of 2016;  
effects  of  the  Wintering  Hills  impairment  charge  during  the  fourth  quarter  of  2016,  and  the  Sundance  Unit  1 
impairment charge during the second quarter of 2017; 
effects of the Mississauga facility recontracting during the fourth quarter of 2016;  
effects of changes in useful lives of certain Canadian Coal assets during the first, second, and third quarters of 2017; 
and 
effects of an impairment of $137 million in 2017 on intercompany financial instruments that is attributable only to 
the non-controlling interests. 

▪ 

▪ 

▪ 

▪ 
▪ 

▪ 
▪ 

▪ 

M97
TRANSALTA CORPORATION M97 

TransAlta Corporation    |    2017  Annual Integrated Report 
Management’s Discussion and Analysis

Management  has  evaluated,  with  the  participation  of  our  Chief  Executive  Officer  and  Chief  Financial  Officer,  the 
effectiveness of our disclosure controls and procedures as of the end of the period covered by this report. Disclosure 
Disclosure Controls and Procedures 
controls  and  procedures  refer  to  controls  and  other  procedures  designed  to  ensure  that  information  required  to  be 
disclosed in  the reports  we  file or submit under the  Securities Exchange  Act of 1934, as amended (“Exchange Act”)  are 
recorded,  processed,  summarized,  and  reported  within  the  time  periods  specified  in  the  rules  and  forms  of  the  U.S. 
Securities  and  Exchange  Commission.  Disclosure  controls  and  procedures  include,  without  limitation,  controls  and 
procedures designed to ensure that information required to be disclosed by us in our reports that we file or submit under 
the Exchange Act is accumulated and communicated to management,  including our Chief Executive Officer and Chief 
Financial Officer, as appropriate to allow timely decisions regarding our required disclosure. In designing and evaluating 
our disclosure controls and procedures, management recognizes that any controls and procedures, no matter how well 
designed  and  operated,  can  provide  only  reasonable  assurance  of  achieving  the  desired  control  objectives,  and 
management is required to apply its judgment in evaluating and implementing possible controls and procedures.  

There have been no other changes in our internal control over financial reporting during the  year ended Dec. 31, 2017, 
that have materially affected, or are reasonably likely to materially affect our internal control over financial reporting. 
Based on the foregoing evaluation, our Chief Executive Officer and Chief Financial Officer have concluded that, as at Dec. 
31, 2017, the end of the period covered by this report, our disclosure controls and procedures were effective.  

M98
M98  TRANSALTA CORPORATION 

TransAlta Corporation    |    2017  Annual Integrated Report 
 
 
Consolidated Financial Statements
Consolidated Financial Statements

Management's Report
The consolidated financial statements and other financial information included in this annual report have been prepared
To the Shareholders of TransAlta Corporation
by management. It is management’s responsibility to ensure that sound judgment, appropriate accounting principles and
methods, and reasonable estimates have been used to prepare this information. They also ensure that all information
presented is consistent.

Management  is  also  responsible  for  establishing  and  maintaining  internal  controls  and  procedures  over  the  financial
reporting process. The internal control system includes an internal audit function and an established business conduct
policy that applies to all employees. In addition, TransAlta Corporation has a code of conduct that applies to all employees
and  is  signed  annually.  The  code  of  conduct  can  be  viewed  on  TransAlta’s  website  (www.transalta.com).  Management
believes the system of internal controls, review procedures and established policies provides reasonable assurance as to
the reliability and relevance of financial reports. Management also believes that TransAlta’s operations are conducted in
conformity with the law and with a high standard of business conduct.

The Board of Directors (the “Board”) is responsible for ensuring that management fulfils its responsibilities for financial
reporting and internal control. The Board carries out its responsibilities principally through its Audit and Risk Committee
(the “Committee”). The Committee, which consists solely of independent directors, reviews the financial statements and
annual report and recommends them to the Board for approval. The Committee meets with management, internal auditors
and external auditors to discuss internal controls, auditing matters and financial reporting issues. Internal and external
auditors have full and unrestricted access to the Committee. The Committee also recommends the firm of external auditors
to be appointed by the shareholders.

Dawn L. Farrell

President and Chief Executive Officer

Donald Tremblay

Chief Financial Officer

March 1, 2018

TRANSALTA CORPORATION F1

F1

TransAlta Corporation    |    2017  Annual Integrated Report 
Consolidated Financial Statements

Management’s Annual Report on Internal Control over Financial Reporting
The following report is provided by management in respect of TransAlta Corporation’s (“TransAlta”) internal control over
To the Shareholders of TransAlta Corporation
financial reporting (as defined in Rules 13a-15f and 15d-15f under the United States Securities Exchange Act of 1934).

TransAlta’s management is responsible for establishing and maintaining adequate internal control over financial reporting
for TransAlta.

Management  has  used  the  Committee  of  Sponsoring  Organizations  of  the  Treadway  Commission  (“COSO”)  2013
framework to evaluate the effectiveness of TransAlta’s internal control over financial reporting. Management believes that
the COSO 2013 framework is a suitable framework for its evaluation of TransAlta’s internal control over financial reporting
because  it  is  free  from  bias,  permits  reasonably  consistent  qualitative  and  quantitative  measurements  of  TransAlta’s
internal controls, is sufficiently complete so that those relevant factors that would alter a conclusion about the effectiveness
of TransAlta’s internal controls are not omitted, and is relevant to an evaluation of internal control over financial reporting.

Internal control over financial reporting cannot provide absolute assurance of achieving financial reporting objectives
because of its inherent limitations. Internal control over financial reporting is a process that involves human diligence and
compliance  and  is  subject  to  lapses  in  judgment  and  breakdowns  resulting  from  human  failures.  Internal  control  over
financial reporting also can be circumvented by collusion or improper overrides. Because of such limitations, there is a risk
that material misstatements may not be prevented or detected on a timely basis by internal control over financial reporting.
However, these inherent limitations are known features of the financial reporting process, and it is possible to design
safeguards into the process to reduce, though not eliminate, this risk.

TransAlta proportionately consolidates the accounts of the Sheerness and Genesee Unit 3 joint operations in accordance
with International Financial Reporting Standards. Management does not have the contractual ability to assess the internal
controls of these joint arrangements. Once the financial information is obtained from these joint arrangements it falls
within  the  scope  of  TransAlta’s  internal  controls  framework.  Management’s  conclusion  regarding  the  effectiveness  of
internal controls does not extend to the internal controls at the transactional level of these joint arrangements. The 2017
consolidated financial statements of TransAlta included $624 million and $550 million of total and net assets, respectively,
as of December 31, 2017, and $160 million and $9 million of revenues and net loss, respectively, for the year then ended
related to these joint arrangements.

Management has assessed the effectiveness of TransAlta’s internal control over financial reporting, as at December 31,
2017, and has concluded that such internal control over financial reporting is effective.

Ernst & Young LLP, who has audited the consolidated financial statements of TransAlta for the year ended December 31,
2017, has also issued a report on internal control over financial reporting under the standards of the Public Company
Accounting Oversight Board (United States). This report is located on the following page of this Annual Report.

Dawn L. Farrell

President and Chief Executive Officer

Donald Tremblay

Chief Financial Officer

March 1, 2018 

F2 TRANSALTA CORPORATION

F2

TransAlta Corporation    |    2017  Annual Integrated ReportConsolidated Financial Statements

Report of Independent Registered Public Accounting Firm
Opinions on the Internal Control over Financial Reporting
We have audited TransAlta Corporation’s internal control over financial reporting as of December 31, 2017, based on
To the Shareholders of TransAlta Corporation
criteria established in Internal Control-Integrated Framework issued by the Committee of Sponsoring Organizations of
the Treadway Commission (2013 framework), (the "COSO criteria"). In our opinion, TransAlta Corporation maintained, in
Report of Independent Registered Public Accounting Firm
Opinions on the Internal Control over Financial Reporting
all material respects, effective internal control over financial reporting as of December 31, 2017, based on the COSO
We have audited TransAlta Corporation’s internal control over financial reporting as of December 31, 2017, based on
criteria.
To the Shareholders of TransAlta Corporation
criteria established in Internal Control-Integrated Framework issued by the Committee of Sponsoring Organizations of
the Treadway Commission (2013 framework), (the "COSO criteria"). In our opinion, TransAlta Corporation maintained, in
We also have audited, in accordance with the standards of the Public Company Accounting Oversight Board (United States)
all material respects, effective internal control over financial reporting as of December 31, 2017, based on the COSO
(“PCAOB”),  the  consolidated  statements  of  financial  position  as  at  December  31,  2017  and  2016,  and  the  related
criteria.
consolidated statements of earnings (loss), comprehensive income (loss), changes in equity and cash flows for each of the
three-year period ended December 31, 2017 of TransAlta Corporation and our report dated March 1, 2018 expressed an
We also have audited, in accordance with the standards of the Public Company Accounting Oversight Board (United States)
unqualified opinion thereon. 
(“PCAOB”),  the  consolidated  statements  of  financial  position  as  at  December  31,  2017  and  2016,  and  the  related
consolidated statements of earnings (loss), comprehensive income (loss), changes in equity and cash flows for each of the
Basis for Opinion
three-year period ended December 31, 2017 of TransAlta Corporation and our report dated March 1, 2018 expressed an
TransAlta Corporation’s management is responsible for maintaining effective internal control over financial reporting, and
unqualified opinion thereon. 
for  its  assessment  of  the  effectiveness  of  internal  control  over  financial  reporting  included  in  the  accompanying
Management’s Annual Report on Internal Control over Financial Reporting. Our responsibility is to express an opinion on
Basis for Opinion
TransAlta  Corporation’s  internal  control  over  financial  reporting  based  on  our  audit.   We  are  a  public  accounting  firm
TransAlta Corporation’s management is responsible for maintaining effective internal control over financial reporting, and
registered with the PCAOB and are required to be independent with respect to the TransAlta Corporation in accordance
for  its  assessment  of  the  effectiveness  of  internal  control  over  financial  reporting  included  in  the  accompanying
with the U.S. federal securities laws and the applicable rules and regulations of the Securities and Exchange Commission
Management’s Annual Report on Internal Control over Financial Reporting. Our responsibility is to express an opinion on
and the PCAOB.
TransAlta  Corporation’s  internal  control  over  financial  reporting  based  on  our  audit.   We  are  a  public  accounting  firm
registered with the PCAOB and are required to be independent with respect to the TransAlta Corporation in accordance
We conducted our audit in accordance with the standard of the PCAOB. The standards of the PCAOB require that we plan
with the U.S. federal securities laws and the applicable rules and regulations of the Securities and Exchange Commission
and perform the audit to obtain reasonable assurance about whether effective internal control over financial reporting
and the PCAOB.
was maintained in all material respects. 

We conducted our audit in accordance with the standard of the PCAOB. The standards of the PCAOB require that we plan
Our audit included obtaining an understanding of internal control over financial reporting, assessing the risk that a material
and perform the audit to obtain reasonable assurance about whether effective internal control over financial reporting
weakness exists, testing and evaluating the design and operating effectiveness of internal control based on the assessed
was maintained in all material respects. 
risk, and performing such other procedures as we considered necessary in the circumstances. We believe that our audit
provides a reasonable basis for our opinion.
Our audit included obtaining an understanding of internal control over financial reporting, assessing the risk that a material
weakness exists, testing and evaluating the design and operating effectiveness of internal control based on the assessed
Definition and Limitations of Internal Control over Financial Reporting
risk, and performing such other procedures as we considered necessary in the circumstances. We believe that our audit
A corporation’s internal control over financial reporting is a process designed to provide reasonable assurance regarding
provides a reasonable basis for our opinion.
the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with
International Financial Reporting Standards by the International Accounting Standards Boards. A corporation’s internal
Definition and Limitations of Internal Control over Financial Reporting
control over financial reporting includes those policies and procedures that (1) pertain to the maintenance of records that,
A corporation’s internal control over financial reporting is a process designed to provide reasonable assurance regarding
in reasonable detail, accurately and fairly reflect the transactions and dispositions of the assets of the corporation; (2)
the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with
provide reasonable assurance that transactions are recorded as necessary to permit preparation of financial statements
International Financial Reporting Standards by the International Accounting Standards Boards. A corporation’s internal
in accordance with International Financial Reporting Standards as issued by the International Accounting Standards Board,
control over financial reporting includes those policies and procedures that (1) pertain to the maintenance of records that,
and  that  receipts  and  expenditures  of  the  corporation  are  being  made  only  in  accordance  with  authorizations  of
in reasonable detail, accurately and fairly reflect the transactions and dispositions of the assets of the corporation; (2)
management  and  directors  of  the  corporation;  and  (3)  provide  reasonable  assurance  regarding  prevention  or  timely
provide reasonable assurance that transactions are recorded as necessary to permit preparation of financial statements
detection of unauthorized acquisition, use, or disposition of the corporation’s assets that could have a material effect on
in accordance with International Financial Reporting Standards as issued by the International Accounting Standards Board,
the financial statements.
and  that  receipts  and  expenditures  of  the  corporation  are  being  made  only  in  accordance  with  authorizations  of
management  and  directors  of  the  corporation;  and  (3)  provide  reasonable  assurance  regarding  prevention  or  timely
Because of its inherent limitations, internal control over financial reporting may not prevent or detect misstatements. Also,
detection of unauthorized acquisition, use, or disposition of the corporation’s assets that could have a material effect on
projections of any evaluation of effectiveness to future periods are subject to the risk that controls may become inadequate
the financial statements.
because of changes in conditions, or that the degree of compliance with the policies or procedures may deteriorate.

Because of its inherent limitations, internal control over financial reporting may not prevent or detect misstatements. Also,
As  indicated  in  the  accompanying  Management’s  Annual  Report  on  Internal  Control  over  Financial  Reporting,
projections of any evaluation of effectiveness to future periods are subject to the risk that controls may become inadequate
management’s assessment of and conclusion on the effectiveness of internal control over financial reporting did not include
because of changes in conditions, or that the degree of compliance with the policies or procedures may deteriorate.
the internal controls of the Sheerness and Genesee Unit 3 joint arrangements, which are included in the 2017 consolidated
financial  statements  of  TransAlta  Corporation  and  constituted  $624  million  and  $550  million  of  total  and  net  assets,
As  indicated  in  the  accompanying  Management’s  Annual  Report  on  Internal  Control  over  Financial  Reporting,
respectively, as of December 31, 2017, and $160 million and $9 million of revenues and net loss, respectively, for the year
management’s assessment of and conclusion on the effectiveness of internal control over financial reporting did not include
then ended.  Our audit of internal control over financial reporting of TransAlta Corporation did not include an evaluation
the internal controls of the Sheerness and Genesee Unit 3 joint arrangements, which are included in the 2017 consolidated
of the internal control over financial reporting of the Sheerness and Genesee Unit 3 joint arrangements.
financial  statements  of  TransAlta  Corporation  and  constituted  $624  million  and  $550  million  of  total  and  net  assets,
respectively, as of December 31, 2017, and $160 million and $9 million of revenues and net loss, respectively, for the year
Chartered Professional Accountants
then ended.  Our audit of internal control over financial reporting of TransAlta Corporation did not include an evaluation
Calgary, Canada
of the internal control over financial reporting of the Sheerness and Genesee Unit 3 joint arrangements.

March 1, 2018 
Chartered Professional Accountants
Calgary, Canada

March 1, 2018 

TRANSALTA CORPORATION F3

TRANSALTA CORPORATION F3

F3

TransAlta Corporation    |    2017  Annual Integrated Report 
 
 
 
 
 
Consolidated Financial Statements

Independent Auditors’ Report of Registered Public Accounting Firm
Opinion on the Consolidated Financial Statements
We  have  audited  the  accompanying  consolidated  financial  statements  of  TransAlta  Corporation  ,  which  comprise  the
To the Shareholders of TransAlta Corporation
consolidated statements of financial position as at December 31, 2017 and December 31, 2016, and the consolidated
statements  of  earnings  (loss),  consolidated  statements  of  comprehensive  income  (loss),  consolidated  statements  of
Independent Auditors’ Report of Registered Public Accounting Firm
changes in equity and consolidated statements of cash flows for the years then ended, and the related notes, comprising
Opinion on the Consolidated Financial Statements
a  summary  of  significant  accounting  policies  and  other  explanatory  information  (collectively  referred  to  as  the
We  have  audited  the  accompanying  consolidated  financial  statements  of  TransAlta  Corporation  ,  which  comprise  the
To the Shareholders of TransAlta Corporation
“consolidated financial statements”).  
consolidated statements of financial position as at December 31, 2017 and December 31, 2016, and the consolidated
statements  of  earnings  (loss),  consolidated  statements  of  comprehensive  income  (loss),  consolidated  statements  of
In  our  opinion,  the  consolidated  financial  statements  present  fairly,  in  all  material  respects,  the  consolidated  financial
changes in equity and consolidated statements of cash flows for the years then ended, and the related notes, comprising
position  of  TransAlta  Corporation  as  at  December  31,  2017  and  December  31,  2016,  and  its  consolidated  financial
a  summary  of  significant  accounting  policies  and  other  explanatory  information  (collectively  referred  to  as  the
performance  and  its  consolidated  cash  flows  for  the  three  years  ended  December  31,  2017,  in  accordance  with
“consolidated financial statements”).  
International Financial Reporting Standards as issued by the International Accounting Standards Board.

In  our  opinion,  the  consolidated  financial  statements  present  fairly,  in  all  material  respects,  the  consolidated  financial
Report on internal control over financial reporting
position  of  TransAlta  Corporation  as  at  December  31,  2017  and  December  31,  2016,  and  its  consolidated  financial
We have also audited, in accordance with the standards of the Public Company Accounting Oversight Board (United States)
performance  and  its  consolidated  cash  flows  for  the  three  years  ended  December  31,  2017,  in  accordance  with
(“PCAOB”), TransAlta Corporation’s internal control over financial reporting as of December 31, 2017, based on the criteria
International Financial Reporting Standards as issued by the International Accounting Standards Board.
established in Internal Control - Integrated Framework (2013) issued by the Committee of Sponsoring Organizations of
the  Treadway  Commission  (“COSO”)  and  our  report  dated  March  1,  2018  expressed  an  unqualified  opinion  on  the
Report on internal control over financial reporting
effectiveness of TransAlta Corporation’s internal control over financial reporting.
We have also audited, in accordance with the standards of the Public Company Accounting Oversight Board (United States)
(“PCAOB”), TransAlta Corporation’s internal control over financial reporting as of December 31, 2017, based on the criteria
Basis for Opinion
established in Internal Control - Integrated Framework (2013) issued by the Committee of Sponsoring Organizations of
Management's responsibility for the Consolidated Financial Statements
the  Treadway  Commission  (“COSO”)  and  our  report  dated  March  1,  2018  expressed  an  unqualified  opinion  on  the
Management  is  responsible  for  the  preparation  and  fair  presentation  of  these  consolidated  financial  statements  in
effectiveness of TransAlta Corporation’s internal control over financial reporting.
accordance with International Financial Reporting Standards as issued by the International Accounting Standards Board,
and for such internal control as management determines is necessary to enable the preparation of consolidated financial
Basis for Opinion
statements that are free from material misstatement, whether due to fraud or error.
Management's responsibility for the Consolidated Financial Statements
Management  is  responsible  for  the  preparation  and  fair  presentation  of  these  consolidated  financial  statements  in
Auditors’ responsibility
accordance with International Financial Reporting Standards as issued by the International Accounting Standards Board,
Our responsibility is to express an opinion on these consolidated financial statements based on our audits. We conducted
and for such internal control as management determines is necessary to enable the preparation of consolidated financial
our audits in accordance with Canadian generally accepted auditing standards and the standards of the PCAOB. Those
statements that are free from material misstatement, whether due to fraud or error.
standards require that we plan and perform the audit to obtain reasonable assurance about whether the consolidated
financial statements are free from material misstatement, whether due to error or fraud. Those standards also require that
Auditors’ responsibility
we  comply  with  ethical  requirements,  including  independence.    We  are  required  to  be  independent  with  respect  to
Our responsibility is to express an opinion on these consolidated financial statements based on our audits. We conducted
TransAlta  Corporation  in  accordance  with  the  ethical  requirements  that  are  relevant  to  our  audit  of  the  consolidated
our audits in accordance with Canadian generally accepted auditing standards and the standards of the PCAOB. Those
financial statements in Canada, the U.S. federal securities laws and the applicable rules and regulations of the Securities
standards require that we plan and perform the audit to obtain reasonable assurance about whether the consolidated
and Exchange Commission and the PCAOB. We are a public accounting firm registered with the PCAOB. 
financial statements are free from material misstatement, whether due to error or fraud. Those standards also require that
we  comply  with  ethical  requirements,  including  independence.    We  are  required  to  be  independent  with  respect  to
An  audit  includes  performing  procedures  to  assess  the  risks  of  material  misstatements  of  the  consolidated  financial
TransAlta  Corporation  in  accordance  with  the  ethical  requirements  that  are  relevant  to  our  audit  of  the  consolidated
statements, whether due to error or fraud, and performing procedures to respond to those risks. Such procedures included
financial statements in Canada, the U.S. federal securities laws and the applicable rules and regulations of the Securities
obtaining and examining, on a test basis, audit evidence regarding the amounts and disclosures in the consolidated financial
and Exchange Commission and the PCAOB. We are a public accounting firm registered with the PCAOB. 
statements.  The  procedures  selected  depend  on  our  judgment,  including  the  assessment  of  the  risks  of  material
misstatement of the consolidated financial statements, whether due to fraud or error.  In making those risk assessments,
An  audit  includes  performing  procedures  to  assess  the  risks  of  material  misstatements  of  the  consolidated  financial
we consider internal control relevant to the TransAlta Corporation’s preparation and fair presentation of the consolidated
statements, whether due to error or fraud, and performing procedures to respond to those risks. Such procedures included
financial statements in order to design audit procedures that are appropriate in the circumstances.
obtaining and examining, on a test basis, audit evidence regarding the amounts and disclosures in the consolidated financial
statements.  The  procedures  selected  depend  on  our  judgment,  including  the  assessment  of  the  risks  of  material
An audit also includes evaluating the appropriateness of accounting policies and principles used and the reasonableness
misstatement of the consolidated financial statements, whether due to fraud or error.  In making those risk assessments,
of accounting estimates made by management, as well as evaluating the overall presentation of the consolidated financial
we consider internal control relevant to the TransAlta Corporation’s preparation and fair presentation of the consolidated
statements.
financial statements in order to design audit procedures that are appropriate in the circumstances.

We believe that the audit evidence we have obtained in our audits is sufficient and appropriate to provide a reasonable
An audit also includes evaluating the appropriateness of accounting policies and principles used and the reasonableness
basis for our audit opinion. 
of accounting estimates made by management, as well as evaluating the overall presentation of the consolidated financial
statements.
We have served as the Corporation’s auditor since 1947.

We believe that the audit evidence we have obtained in our audits is sufficient and appropriate to provide a reasonable
Chartered Professional Accountants
basis for our audit opinion. 
Calgary, Canada
We have served as the Corporation’s auditor since 1947.
March 1, 2018 
Chartered Professional Accountants
Calgary, Canada

F4 TRANSALTA CORPORATION

March 1, 2018 

F4 TRANSALTA CORPORATION

F4

TransAlta Corporation    |    2017  Annual Integrated Report 
 
 
 
 
 
 
 
Consolidated Financial Statements

Consolidated Statements of Earnings (Loss)
Year ended Dec. 31 (in millions of Canadian dollars except where noted)

2017

2016

2015

Revenues (Note 33)

Fuel and purchased power (Note 5)

Gross margin

Operations, maintenance, and administration (Note 5)

Depreciation and amortization

Asset impairment charges (reversals) (Note 6)

Restructuring provision (Note 4)

Taxes, other than income taxes

Net other operating (income) losses (Note 8)

Operating income

Finance lease income (Note 7)

Net interest expense (Note 9)

Foreign exchange gain (loss)

Gain on sale of assets and other (Note 4)

Earnings (loss) before income taxes

Income tax expense (Note 10)

Net earnings (loss)

Net earnings (loss) attributable to:

TransAlta shareholders

Non-controlling interests (Note 11)

Net earnings (loss) attributable to TransAlta shareholders

Preferred share dividends (Note 24)

Net earnings (loss) attributable to common shareholders

Weighted average number of common shares outstanding in the year (millions)

2,307

1,016

1,291

517

635

20

—

30

(49)

138

54

(247)

(1)

2

(54)

64

(118)

(160)

42

(118)

(160)

30

(190)

288

2,397

963

1,434

489

601

28

1

31

(194)

478

66

(229)

(5)

4

314

38

276

169

107

276

169

52

117

288

2,267

1,008

1,259

492

545

(2)

22

29

25

148

58

(251)

4

262

221

105

116

22

94

116

22

46

(24)

280

Net earnings (loss) per share attributable to common shareholders, 
  basic and diluted (Note 23)

(0.66)

0.41

(0.09)

See accompanying notes.

TRANSALTA CORPORATION F5

F5

TransAlta Corporation    |    2017  Annual Integrated Report 
 
 
Consolidated Financial Statements

Consolidated Statements of Comprehensive Income (Loss)
Year ended Dec. 31 (in millions of Canadian dollars)
Net earnings (loss)

2017

Other comprehensive income (loss)

Net actuarial gains (losses) on defined benefit plans, net of tax(1)
Gains (losses) on derivatives designated as cash flow hedges, net of tax(2)

Total items that will not be reclassified subsequently to net earnings

Gains (losses) on translating net assets of foreign operations, net of tax(3)
Reclassification of translation gains on net assets of divested foreign operations(4) 
  (Note 4) 

Gains (losses) on financial instruments designated as hedges of foreign operations, 
  net of tax(5)

Reclassification of losses on financial instruments designated as hedges of divested 
  foreign operations, net of tax(6)
Gains on derivatives designated as cash flow hedges, net of tax(7)

 (Note 4)

Reclassification of gains on derivatives designated as cash flow hedges to net earnings, 
  net of tax(8)

Total items that will be reclassified subsequently to net earnings

Other comprehensive income

Total comprehensive income (loss)

Total comprehensive income (loss) attributable to:

TransAlta shareholders

Non-controlling interests (Note 11)

(118)

(6)

(1)

(7)

(80)

(9)

50

14

214

(107)

82

75

(43)

(74)

31

(43)

2016

276

2015

116

8

(1)

7

(71)

—

18

—

179

(48)

78

85

361

215

146

361

4

3

7

247

(10)

(172)

6

375

(194)

252

259

375

272

103

375

(1) Net of income tax recovery of 4 for the year ended Dec. 31, 2017 (2016 - 4 expense, 2015 - nil ).
(2) Net of income tax expense of nil for the year ended Dec. 31, 2017 (2016 - nil ,  2015 - 1 expense).
(3) Net of income tax expense of nil for the year ended Dec. 31, 2017 (2016 - 11, 2015 - nil).
(4) Net of reclassification of income tax expense of 11 for the year ended Dec. 31, 2017 (2016 - nil, 2015 - nil).
(5) Net of income tax expense of 2 for the year ended Dec. 31, 2017 (2016 - 5 expense, 2015 - 7 expense).
(6) Net of reclassification of income tax recovery of 2 for the year ended Dec. 31, 2017 (2016 - nil recovery, 2015 - 1 recovery).
(7) Net of income tax recovery of 77 for the year ended Dec. 31, 2017 (2016 - 92 expense, 2015 - 138 expense).
(8) Net of reclassification of  income tax expense of 31 for the year ended Dec. 31, 2017 (2016 - 41 expense,  2015 - 50 expense).

See accompanying notes.

F6 TRANSALTA CORPORATION

F6

TransAlta Corporation    |    2017  Annual Integrated Report 
 
Consolidated Financial Statements

As at Dec. 31 (in millions of Canadian dollars)
Consolidated Statements of Financial Position
Cash and cash equivalents
Trade and other receivables (Note 12)

Prepaid expenses

Risk management assets (Notes 13 and 14)

Inventory (Note 15)

Assets held for sale (Note 4)

Restricted cash (Note 21)

Long-term portion of finance lease receivables (Note 7)

Property, plant, and equipment (Note 16)

Cost

Accumulated depreciation

Goodwill (Note 17)

Intangible assets (Note 18)

Deferred income tax assets (Note 10)

Risk management assets (Notes 13 and 14)

Other assets (Note 19)

Total assets

Accounts payable and accrued liabilities

Current portion of decommissioning and other provisions (Note 20)

Risk management liabilities (Notes 13 and 14)

Income taxes payable

Dividends payable (Note 23)

Current portion of long-term debt and finance lease obligations (Note 21)

Credit facilities, long-term debt, and finance lease obligations (Note 21)

Decommissioning and other provisions (Note 20)

Deferred income tax liabilities (Note 10)

Risk management liabilities (Notes 13 and 14)

Defined benefit obligation and other long-term liabilities (Note 22)

Equity

Common shares (Note 23)

Preferred shares (Note 24)

Contributed surplus

Deficit

Accumulated other comprehensive income (Note 25)

Equity attributable to shareholders

Non-controlling interests (Note 11)

Total equity

Total liabilities and equity

Commitments and contingencies (Note 32)

Subsequent events (Note 34)
 See accompanying notes.

On behalf of the Board: 

Gordon D. Giffin 
Director 

Alan J. Fohrer
Director

2017

2016

314

933

24

219

219

—

1,709

30

215

305

703

23

249

213

61

1,554

—

719

12,973

12,773

(6,395)

6,578

(5,949)

6,824

463

364

24

684

237

464

355

53

785

242

10,304

10,996

595

67

101

64

34

747

1,608

2,960

403

549

40

359

3,094

942

10

(1,209)

489

3,326

1,059

4,385

413

39

66

6

54

639

1,217

3,722

304

712

48

330

3,094

942

9

(933)

399

3,511

1,152

4,663

10,304

10,996

TRANSALTA CORPORATION F7

F7

TransAlta Corporation    |    2017  Annual Integrated Report 
 
 
Consolidated Financial Statements

(in millions of Canadian dollars)

Consolidated Statements of Changes in Equity

Common
shares

Preferred
shares

Contributed

surplus Deficit

Accumulated
other
comprehensive
income(1)

Attributable
to
shareholders

Attributable
to
non-
controlling
interests

Total

Balance, Dec 31, 2015

Net earnings

3,075

—

942

—

Other comprehensive income
(loss):
Net losses on translating net 
  assets of foreign operations, 
  net of hedges and of tax

Net gains on derivatives 
  designated as cash flow hedges, 
  net of tax

Net actuarial gains on 
  defined benefits plans, net of tax
Intercompany available-for-sale 
  investments
Total comprehensive income

Common share dividends

Preferred share dividends

Changes in non-controlling
interests in TransAlta Renewables 
  (Note 4)
Distributions paid, and payable, to 
  non-controlling interests
Common shares issued

Balance, Dec 31, 2016

Net earnings (loss)

Other comprehensive income 
  (loss):

Net losses on translating net 
  assets of foreign operations, 
  net of hedges and of tax

Net gains on derivatives 
  designated as cash flow hedges, 
  net of tax

Net actuarial gains on 
  defined benefits plans, net of tax
Intercompany available-for-sale 
  investments

Total comprehensive income

Common share dividends

Preferred share dividends

Changes in non-controlling
interests in TransAlta Renewables 
  (Note 4)

Effect of share-based payment 
  plans

Distributions paid, and payable, to 
  non-controlling interests

—

—

—

—

—

—

—

—

19

—

—

—

—

—

—

—

—

—

3,094

942

—

—

—

—

—

—

—

—

—

—

—

—

—

—

—

—

—

—

—

—

9

—

—

—

—

—

—

—

—

—

—

9

—

—

—

—

—

—

—

—

—

1

(1,018)

169

353

—

3,361

169

1,029

4,390

107

276

—

—

—

—

169

(58)

(52)

26

—

—

(933)

(160)

—

—

—

—

(160)

(34)

(30)

(52)

—

—

(53)

(53)

—

(53)

106

8

(15)

46

—

—

—

—

—

399

—

106

8

(15)

215

(58)

(52)

26

—

19

3,511

(160)

(25)

(25)

106

(6)

11

86

4

—

—

—

—

106

(6)

11

(74)

(34)

(30)

(48)

1

—

24

—

15

130

8

—

146

361

—

—

(58)

(52)

138

164

(161)

(161)

—

19

1,152

4,663

42

(118)

—

—

—

(11)

31

—

—

48

—

(25)

106

(6)

—

(43)

(34)

(30)

—

1

(172)

(172)

Balance, Dec 31, 2017

3,094

942

10

(1,209)

489

3,326

1,059

4,385

(1) Refer to Note 25 for details on components of, and changes in, accumulated other comprehensive income (loss).

See accompanying notes.

F8 TRANSALTA CORPORATION

F8

TransAlta Corporation    |    2017  Annual Integrated Report 
 
Consolidated Financial Statements

Year ended Dec. 31 (in millions of Canadian dollars)

Consolidated Statements of Cash Flows

2017

2016

2015

Operating activities

Net earnings (loss)

Depreciation and amortization (Note 33)

Gain on sale of assets (Note 4)

Accretion of provisions (Note 20)

Decommissioning and restoration costs settled (Note 20)

Deferred income tax expense (recovery) (Note 10)

Unrealized (gain) loss from risk management activities

Unrealized foreign exchange (gain) loss

Provisions

Asset impairment charges (reversals) (Note 6)

Other non-cash items

Cash flow from operations before changes in working capital

Change in non-cash operating working capital balances (Note 29)

Cash flow from operating activities

Investing activities

Additions to property, plant, and equipment (Notes 16 and 33)

Additions to intangibles (Notes 18 and 33)

Restricted cash (Notes 19 and 21)

Loan receivable (Note 19)

Acquisition of renewable energy facilities, net of cash acquired (Note 4)

Proceeds on sale of property, plant, and equipment

Proceeds on sale of Wintering Hills facility and Solomon disposition (Note 4)

Income tax expense on Solomon disposition (Notes 4 and 10)

Realized gains (losses) on financial instruments

Decrease in finance lease receivable

Other

Change in non-cash investing working capital balances

Cash flow from (used in) investing activities

Financing activities

Net increase (decrease) in borrowings under credit facilities (Note 21)

Repayment of long-term debt (Note 21)

Issuance of long-term debt (Note 21)

Dividends paid on common shares (Note 23)

Dividends paid on preferred shares (Note 24)

Net proceeds on sale of non-controlling interest in subsidiary (Note 4)

Realized gains (losses) on financial instruments

Distributions paid to subsidiaries’ non-controlling interests (Note 11)

Decrease in finance lease obligations (Note 21)

Other

Cash flow from (used in) financing activities

Cash flow from operating, investing, and financing activities

Effect of translation on foreign currency cash

Increase in cash and cash equivalents

Cash and cash equivalents, beginning of year

Cash and cash equivalents, end of year

Cash income taxes paid

Cash interest paid

See accompanying notes.

(118)

708

(1)

23

(19)

(15)

(48)

22

(7)

20

175

740

(114)

626

(338)

(51)

(30)

(38)

—

3

478

(56)

6

59

(3)

57

87

26

(814)

260

(46)

(40)

—

106

(172)

(17)

(6)

(703)

10

(1)

9

305

314

14

230

276

664

(1)

20

(23)

15

58

(1)

(123)

28

(242)

671

73

744

(358)

(21)

—

—

—

6

—

—

(6)

56

2

(6)

(327)

(315)

(88)

361

(69)

(42)

162

(2)

(151)

(16)

(3)

(163)

254

(3)

251

54

305

27

235

116

605

(262)

21

(24)

86

61

13

101

(2)

(41)

674

(242)

432

(476)

(26)

—

—

(101)

7

—

—

(12)

23

24

(12)

(573)

218

(758)

487

(124)

(46)

404

87

(99)

(13)

(7)

149

8

3

11

43

54

17

242

TRANSALTA CORPORATION F9

F9

TransAlta Corporation    |    2017  Annual Integrated Report 
 
Notes to Consolidated Financial Statements

(Tabular amounts in millions of Canadian dollars, except as otherwise noted)
(Tabular amounts in millions of Canadian dollars, except as otherwise noted)
Notes to Consolidated Financial Statements

1. Corporate Information
TransAlta Corporation (“TransAlta” or the “Corporation”) was incorporated under the Canada Business Corporations Act in
A. Description of the Business
March 1985. The Corporation became a public company in December 1992. Its head office is located in Calgary, Alberta.

I. Generation Segments

The six generation segments of the Corporation are as follows: Canadian Coal, US Coal, Canadian Gas, Australian Gas,
Wind and Solar, and Hydro. The Corporation owns and operates hydro, wind and solar, natural gas and coal-fired facilities,
and related mining operations in Canada, the United States (“US”), and Australia. Revenues are derived from the availability
and production of electricity and steam as well as ancillary services such as system support. Electricity sales made by the
Corporation’s commercial and industrial group are assumed to be sourced from the Corporation’s production and have
been included in the Canadian Coal segment.

II. Energy Marketing Segment

The Energy Marketing segment derives revenue and earnings from the wholesale trading of electricity and other energy-
related commodities and derivatives.

Energy Marketing manages available generating capacity as well as the fuel and transmission needs of the generation
segments by utilizing contracts of various durations for the forward sales of electricity and for the purchase of natural gas
and transmission capacity. Energy Marketing is also responsible for recommending portfolio optimization decisions. The
results of these other activities are included in each generation segment.

III. Corporate

The Corporate segment includes the Corporation’s central financial, legal, administrative, and investor relation functions.
Charges directly or reasonably attributable to other segments are allocated thereto.

These consolidated financial statements have been prepared by management in compliance with International Financial
B. Basis of Preparation
Reporting Standards (“IFRS”) as issued by the International Accounting Standards Board (“IASB”).

The consolidated financial statements have been prepared on a historical cost basis except for financial instruments and
assets held for sale, which are measured at fair value, as explained in the following accounting policies.

These  consolidated  financial  statements  were  authorized  for  issue  by  TransAlta's  Board  of  Directors  (the  "Board")  on
March 1, 2018.

The consolidated financial statements include the accounts of the Corporation and the subsidiaries that it controls. Control
C. Basis of Consolidation
exists when the Corporation is exposed, or has rights, to variable returns from its involvement with the subsidiary and has
the ability to affect the returns through its power over the subsidiary. The financial statements of the subsidiaries are
prepared for the same reporting period and apply consistent accounting policies as the parent company.

F10 TRANSALTA CORPORATION

F10

TransAlta Corporation    |    2017  Annual Integrated Report 
 
 
Notes to Consolidated Financial Statements

2. Significant Accounting Policies
The majority of the Corporation’s revenues are derived from the sale of physical power, the leasing of power facilities, and
from energy marketing and trading activities.
A. Revenue Recognition

Revenues are measured at the fair value of the consideration received or receivable.

Revenues  under  long-term  electricity  and  thermal  sales  contracts  generally  include  one  or  more  of  the  following
components: fixed capacity payments for availability, energy payments for generation of electricity, incentives or penalties
for exceeding or not meeting availability targets, excess energy payments for power generation above committed capacity,
and ancillary services. Each component is recognized when: i) output, delivery or satisfaction of specific targets is achieved,
all as governed by contractual terms; ii) the amount of revenue can be measured reliably; iii) it is probable that the economic
benefits will flow to the Corporation; and iv) the costs incurred or to be incurred in respect of the transaction can be
measured reliably. Revenue from the rendering of services is recognized when criteria ii), iii) and iv) above are met and
when the stage of completion of the transaction at the end of the reporting period can be measured reliably. 

Revenues from non-contracted capacity are comprised of energy payments, at market prices, for each megawatt hour
(“MWh”) produced, and are recognized upon delivery.

In certain situations, a long-term electricity or thermal sales contract may contain, or be considered, a lease. Revenues
associated with non-lease elements are recognized as goods or services revenues as outlined above. Revenues associated
with leases are recognized as outlined in Note 2(R). 

Commodity risk management activities involve the use of derivatives such as physical and financial swaps, forward sales
contracts, futures contracts, and options, which are used to earn revenues and to gain market information. These derivatives
are accounted for using fair value accounting. The initial recognition and subsequent changes in fair value affect reported
net earnings in the period the change occurs and are presented on a net basis in revenue. The fair values of instruments
that  remain  open  at  the  end  of  the  reporting  period  represent  unrealized  gains  or  losses  and  are  presented  on  the
Consolidated Statements of Financial Position as risk management assets or liabilities. Some of the derivatives used by the
Corporation in trading activities are not traded on an active exchange or have terms that extend beyond the time period
for which exchange-based quotes are available. The fair values of these derivatives are determined using internal valuation
techniques or models.

The Corporation, its subsidiary companies and joint arrangements each determine their functional currency based on the
currency  of  the  primary  economic  environment  in  which  they  operate.  The  Corporation’s  functional  currency  is  the
B. Foreign Currency Translation
Canadian dollar, while the functional currencies of its subsidiary companies and joint arrangements are the Canadian, US
or Australian dollar. Transactions denominated in a currency other than the functional currency of an entity are translated
at the exchange rate in effect on the transaction date. The resulting exchange gains and losses are included in each entity’s
net earnings in the period in which they arise.

The Corporation’s foreign operations are translated to the Corporation’s presentation currency, which is the Canadian
dollar, for inclusion in the consolidated financial statements. Foreign-denominated monetary and non-monetary assets
and liabilities of foreign operations are translated at exchange rates in effect at the end of the reporting period, and revenue
and expenses are translated at exchange rates in effect on the transaction date. The resulting translation gains and losses
are included in Other Comprehensive Income (Loss) (“OCI”) with the cumulative gain or loss reported in Accumulated Other
Comprehensive Income (Loss) (“AOCI”). Amounts previously recognized in AOCI are recognized in net earnings when there
is a reduction in a foreign net investment as a result of a disposal, partial disposal or loss of control.

TRANSALTA CORPORATION F11

F11

TransAlta Corporation    |    2017  Annual Integrated Report 
 
Notes to Consolidated Financial Statements

I. Financial Instruments
Financial assets and financial liabilities, including derivatives and certain non-financial derivatives, are recognized on the
C. Financial Instruments and Hedges
Consolidated  Statements  of  Financial  Position  when  the  Corporation  becomes  a  party  to  the  contract.  All  financial
instruments, except for certain non-financial derivative contracts that meet the Corporation’s own use requirements, are
measured at fair value upon initial recognition. Measurement in subsequent periods depends on whether the financial
instrument  has  been  classified  as:  at  fair  value  through  profit  or  loss,  available-for-sale,  held-to-maturity,  loans  and
receivables, or other financial liabilities. Classification of the financial instrument is determined at inception depending on
the nature and purpose of the financial instrument.

Financial assets and financial liabilities classified or designated as at fair value through profit or loss are measured at fair
value with changes in fair values recognized in net earnings. Financial assets classified as either held-to-maturity or as loans
and  receivables,  and  other  financial  liabilities,  are  measured  at  amortized  cost  using  the  effective  interest  method  of
amortization. Available-for-sale financial assets are those non-derivative financial assets that are designated as such or
that have not been classified as another type of financial asset, and are measured at fair value through OCI. Available-for-
sale financial assets are measured at cost if fair value is not reliably measurable.

Financial assets are assessed for impairment on an ongoing basis and at reporting dates. An impairment may exist if an
incurred loss event has arisen that has an impact on the recoverability of the financial asset. Factors that may indicate an
incurred loss event and related impairment may exist include, for example, if a debtor is experiencing significant financial
difficulty, or a debtor has entered or it is probable that they will enter, bankruptcy or other financial reorganization. The
carrying amount of financial assets, such as receivables, is reduced for impairment losses through the use of an allowance
account, and the loss is recognized in net earnings.

Financial  assets  are  derecognized  when  the  contractual  rights  to  receive  cash  flows  expire.  Financial  liabilities  are
derecognized when the obligation is discharged, cancelled or expired.

Financial  assets  and  financial  liabilities  are  offset  and  the  net  amount  is  reported  in  the  Consolidated  Statements  of
Financial Position if there is a currently enforceable legal right to offset the recognized amounts and there is an intention
to settle on a net basis or to realize the assets and settle the liabilities simultaneously.

Derivative  instruments  that  are  embedded  in  financial  or  non-financial  contracts  that  are  not  already  required  to  be
recognized at fair value are treated and recognized as separate derivatives if their risks and characteristics are not closely
related to their host contracts and the contract is not measured at fair value. Changes in the fair values of these and other
derivative instruments are recognized in net earnings with the exception of the effective portion of i) derivatives designated
as cash flow hedges and ii) hedges of foreign currency exposure of a net investment in a foreign operation, each of which
is recognized in OCI. Derivatives used in commodity risk management activities are described in more detail in Note 2(A).

Transaction costs are expensed as incurred for financial instruments classified or designated as at fair value through profit
or loss. For other financial instruments, such as debt instruments, transaction costs are recognized as part of the carrying
amount of the financial instrument. The Corporation uses the effective interest method of amortization for any transaction
costs or fees, premiums or discounts earned or incurred for financial instruments measured at amortized cost.

F12 TRANSALTA CORPORATION

F12

TransAlta Corporation    |    2017  Annual Integrated ReportNotes to Consolidated Financial Statements

II. Hedges
Where  hedge  accounting  can  be  applied  and  the  Corporation  chooses  to  seek  hedge  accounting  treatment,  a  hedge
relationship  is  designated  as  a  fair  value  hedge,  a  cash  flow  hedge,  or  a  hedge  of  foreign  currency  exposures  of  a  net
investment  in  a  foreign  operation.  A  hedging  relationship  qualifies  for  hedge  accounting  if,  at  inception,  it  is  formally
designated and documented as a hedge, and the hedge is expected to be highly effective at inception and on an ongoing
basis. The documentation includes identification of the hedging instrument and hedged item or transaction, the nature of
the risk being hedged, the Corporation’s risk management objectives and strategy for undertaking the hedge, and how
hedge effectiveness will be assessed. The process of hedge accounting includes linking derivatives to specific recognized
assets and liabilities or to specific firm commitments or highly probable anticipated transactions.

The Corporation formally assesses, both at the hedge’s inception and on an ongoing basis, whether the derivatives used
are highly effective in offsetting changes in fair values or cash flows of hedged items. If hedge criteria are not met or the
Corporation does not apply hedge accounting, the derivative is accounted for on the Consolidated Statements of Financial
Position at fair value, with subsequent changes in fair value recorded in net earnings in the period of change.

a. Fair Value Hedges
In a fair value hedging relationship, the carrying amount of the hedged item is adjusted for changes in fair value attributable
to the hedged risk, with the changes being recognized in net earnings. Changes in the fair value of the hedged item, to the
extent that the hedging relationship is effective, are offset by changes in the fair value of the hedging derivative, which is
also  recorded  in  net  earnings.  Hedge  effectiveness  for  fair  value  hedges  is  achieved  if  changes  in  the  fair  value  of  the
derivative are highly effective at offsetting changes in the fair value of the item hedged. If hedge accounting is discontinued,
the carrying amount of the hedged item is no longer adjusted and the cumulative fair value adjustments to the carrying
amount of the hedged item are amortized to net earnings over the remaining term of the original hedging relationship.

The Corporation primarily uses interest rate swaps as fair value hedges to manage the ratio of floating rate versus fixed
rate debt. Interest rate swaps require the periodic exchange of payments without the exchange of the notional principal
amount  on  which  the  payments  are  based.  Interest  expense  on  the  debt  is  adjusted  to  include  the  payments  made  or
received under the interest rate swaps.

b. Cash Flow Hedges
In  a  cash  flow  hedging  relationship,  the  effective  portion  of  the  change  in  the  fair  value  of  the  hedging  derivative  is
recognized  in  OCI  while  any  ineffective  portion  is  recognized  in  net  earnings.  Hedge  effectiveness  is  achieved  if  the
derivative’s cash flows are highly effective at offsetting the cash flows of the hedged item and the timing of the cash flows
is  similar.  All  components  of  each  derivative’s  change  in  fair  value  are  included  in  the  assessment  of  cash  flow  hedge
effectiveness.  If  hedge  accounting  is  discontinued,  the  amounts  previously  recognized  in  AOCI  are  reclassified  to  net
earnings during the periods when the variability in the cash flows of the hedged item affects net earnings. Gains and losses
on  derivatives  are  reclassified  to  net  earnings  from  AOCI  immediately  when  the  forecasted  transaction  is  no  longer
expected to occur within the time period specified in the hedge documentation.

The Corporation primarily uses physical and financial swaps, forward sales contracts, futures contracts and options as cash
flow hedges to hedge the Corporation’s exposure to fluctuations in electricity and natural gas prices. If hedging criteria are
met, the fair values of the hedges are recorded in risk management assets or liabilities with changes in value being reported
in OCI. Gains and losses on these derivatives are recognized, on settlement, in net earnings in the same period and financial
statement caption as the hedged exposure.

The Corporation also uses foreign currency forward contracts as cash flow hedges to hedge the foreign exchange exposures
resulting from highly probable forecasted project-related transactions denominated in foreign currencies. If the hedging
criteria are met, changes in fair value are reported in OCI with the fair value being reported in risk management assets or
liabilities, as appropriate. Upon settlement of the derivative, any gain or loss on the forward contracts is included in the
cost of the asset acquired or liability incurred.

TRANSALTA CORPORATION F13

F13

TransAlta Corporation    |    2017  Annual Integrated ReportNotes to Consolidated Financial Statements

The Corporation uses forward starting interest rate swaps as cash flow hedges to hedge exposures to anticipated changes
in interest rates for forecasted issuances of debt. If the hedging criteria are met, changes in fair value are reported in OCI
with the fair value being reported in risk management assets or liabilities, as appropriate. When the swaps are closed out
on issuance of the debt, the resulting gains or losses recorded in AOCI are amortized to net earnings over the term of the
swap. If no debt is issued, the gains or losses are recognized in net earnings immediately.

c. Hedges of Foreign Currency Exposures of a Net Investment in a Foreign Operation
In hedging a foreign currency exposure of a net investment in a foreign operation, the effective portion of foreign exchange
gains and losses on the hedging instrument is recognized in OCI and the ineffective portion is recognized in net earnings.
The  related  fair  values  are  recorded  in  risk  management  assets  or  liabilities,  as  appropriate.  The  amounts  previously
recognized in AOCI are recognized in net earnings when there is a reduction in the hedged net investment as a result of a
disposal, partial disposal or loss of control. The Corporation primarily uses foreign currency forward contracts and foreign-
denominated debt to hedge exposure to changes in the carrying values of the Corporation’s net investments in foreign
operations that result from changes in foreign exchange rates.

Cash and cash equivalents are comprised of cash and highly liquid investments with original maturities of three months or
less.
D. Cash and Cash Equivalents

The terms and conditions of certain contracts may require the Corporation or its counterparties to provide collateral when
the  fair  value  of  the  obligation  pursuant  to  these  contracts  is  in  excess  of  any  credit  limits  granted.  Downgrades  in
E. Collateral Paid and Received
creditworthiness by certain credit rating agencies may decrease the credit limits granted and accordingly increase the
amount of collateral that may have to be provided.

I. Fuel
F. Inventory
The Corporation’s inventory balance is comprised of coal and natural gas used as fuel, which is measured at the lower of
weighted average cost and net realizable value.

The cost of internally produced coal inventory is determined using absorption costing, which is defined as the sum of all
applicable expenditures and charges directly incurred in bringing inventory to its existing condition and location. Available
coal inventory tends to increase during the second and third quarters as a result of favourable weather conditions and
lower electricity production as maintenance is performed. Due to the limited number of processing steps incurred in mining
coal and preparing it for consumption and its relatively low value on a per-unit basis, management does not distinguish
between work in process and coal available for consumption. The cost of natural gas and purchased coal inventory includes
all applicable expenditures and charges incurred in bringing the inventory to its existing condition and location.

II. Energy Marketing
Commodity inventories held in the Energy Marketing segment for trading purposes are measured at fair value less costs
to sell. Changes in fair value less costs to sell are recognized in net earnings in the period of change.

III. Parts and Materials
Parts, materials, and supplies are recorded at the lower of cost, measured at moving average costs, and net realizable value.

F14 TRANSALTA CORPORATION

F14

TransAlta Corporation    |    2017  Annual Integrated ReportNotes to Consolidated Financial Statements

The Corporation’s investment in property, plant, and equipment (“PP&E”) is initially measured at the original cost of each
component at the time of construction, purchase, or acquisition. A component is a tangible portion of an asset that can be
G. Property, Plant, and Equipment
separately identified and depreciated over its own expected useful life, and is expected to provide a benefit for a period in
excess of one year. Original cost includes items such as materials, labour, borrowing costs, and other directly attributable
costs, including the initial estimate of the cost of decommissioning and restoration. Costs are recognized as PP&E assets
if it is probable that future economic benefits will be realized and the cost of the item can be measured reliably. The cost
of major spare parts is capitalized and classified as PP&E, as these items can only be used in connection with an item of
PP&E.

Planned  maintenance  is  performed  at  regular  intervals.  Planned  major  maintenance  includes  inspection,  repair,  and
maintenance  of  existing  components,  and  the  replacement  of  existing  components.  Costs  incurred  for  planned  major
maintenance activities are capitalized in the period maintenance activities occur and are amortized on a straight-line basis
over the term until the next major maintenance event. Expenditures incurred for the replacement of components during
major maintenance are capitalized and amortized over the estimated useful life of such components.

The cost of routine repairs and maintenance and the replacement of minor parts are charged to net earnings as incurred.

Subsequent to initial recognition and measurement at cost, all classes of PP&E continue to be measured using the cost
model and are reported at cost less accumulated depreciation and impairment losses, if any.

An item of PP&E or a component is derecognized upon disposal or when no future economic benefits are expected from
its use or disposal. Any gain or loss arising on derecognition is included in net earnings when the asset is derecognized.

The estimate of the useful lives of each component of PP&E is based on current facts and past experience, and takes into
consideration existing long-term sales agreements and contracts, current and forecasted demand, and the potential for
technological obsolescence. The useful life is used to estimate the rate at which the component of PP&E is depreciated.
PP&E  assets  are  subject  to  depreciation  when  the  asset  is  considered  to  be  available  for  use,  which  is  typically  upon
commencement of commercial operations. Capital spares that are designated as critical for uninterrupted operation in a
particular facility are depreciated over the life of that facility, even if the item is not in service. Other capital spares begin
to be depreciated when the item is put into service. Each significant component of an item of PP&E is depreciated to its
residual value over its estimated useful life, generally using straight-line or unit-of-production methods. Estimated useful
lives,  residual  values,  and  depreciation  methods  are  reviewed  annually  and  are  subject  to  revision  based  on  new  or
additional  information.  The  effect  of  a  change  in  useful  life,  residual  value,  or  depreciation  method  is  accounted  for
prospectively.

Estimated useful lives of the components of depreciable assets, categorized by asset class, are as follows:

Coal generation

Gas generation

Hydro generation

Wind generation

Mining property and equipment

Capital spares and other

2-14 years

2-30 years

3-60 years

3-30 years

2-14 years

2-30 years

TransAlta  capitalizes  borrowing  costs  on  capital  invested  in  projects  under  construction  (see  Note  2(S)).  Upon
commencement  of  commercial  operations,  capitalized  borrowing  costs,  as  a  portion  of  the  total  cost  of  the  asset,  are
depreciated over the estimated useful life of the related asset.

Intangible assets acquired in a business combination are recognized separately from goodwill at their fair value at the date
of acquisition. Intangible assets acquired separately are recognized at cost. Internally generated intangible assets arising
H. Intangible Assets
from  development  projects  are  recognized  when  certain  criteria  related  to  the  feasibility  of  internal  use  or  sale,  and
probable future economic benefits of the intangible asset, are demonstrated.

TRANSALTA CORPORATION F15

F15

TransAlta Corporation    |    2017  Annual Integrated ReportNotes to Consolidated Financial Statements

Intangible assets are initially recognized at cost, which is comprised of all directly attributable costs necessary to create,
produce, and prepare the intangible asset to be capable of operating in the manner intended by management. 

Subsequent to initial recognition, intangible assets continue to be measured using the cost model, and are reported at cost
less accumulated amortization and impairment losses, if any. Amortization is included in depreciation and amortization
and fuel and purchased power in the Consolidated Statements of Earnings (Loss).

Amortization commences when the intangible asset is available for use, and is computed on a straight-line basis over the
intangible asset’s estimated useful life, except for coal rights, which are amortized using a unit-of-production basis, based
on the estimated mine reserves. Estimated useful lives of intangible assets may be determined, for example, with reference
to the term of the related contract or licence agreement. The estimated useful lives and amortization methods are reviewed
annually with the effect of any changes being accounted for prospectively.

Intangible assets consist of power sale contracts with fixed prices higher than market prices at the date of acquisition, coal
rights, software, and intangibles under development. Estimated useful lives of intangible assets are as follows:

Software

Power sale contracts

2-7 years

5-20 years

At the end of each reporting period, the Corporation assesses whether there is any indication that PP&E and finite life
intangible assets are impaired.
I. Impairment of Tangible and Intangible Assets Excluding Goodwill

Factors  that  could  indicate  that  an  impairment  exists  include:  significant  underperformance  relative  to  historical  or
projected operating results; significant changes in the manner in which an asset is used, or in the Corporation’s overall
business strategy; or significant negative industry or economic trends. In some cases, these events are clear. However, in
many cases, a clearly identifiable event indicating possible impairment does not occur. Instead, a series of individually
insignificant events occur over a period of time leading to an indication that an asset may be impaired. This can be further
complicated in situations where the Corporation is not the operator of the facility. Events can occur in these situations that
may not be known until a date subsequent to their occurrence.

The  Corporation’s  operations,  the  market,  and  business  environment  are  routinely  monitored,  and  judgments  and
assessments are made to determine whether an event has occurred that indicates a possible impairment. If such an event
has occurred, an estimate is made of the recoverable amount of the asset or cash-generating unit (“CGU”) to which the
asset belongs. Recoverable amount is the higher of an asset’s fair value less costs of disposal and its value in use. Fair value
is the price that would be received to sell an asset in an orderly transaction between market participants at the measurement
date. In determining fair value, recent market transactions are taken into account. If no such transactions can be identified,
an appropriate valuation model such as discounted cash flows is used. Value in use is the present value of the estimated
future cash flows expected to be derived from the asset from its continued use and ultimate disposal by the Corporation.
If the recoverable amount is less than the carrying amount of the asset or CGU, an asset impairment loss is recognized in
net earnings, and the asset’s carrying amount is reduced to its recoverable amount.

At  each  reporting  date,  an  assessment  is  made  whether  there  is  any  indication  that  an  impairment  loss  previously
recognized may no longer exist or may have decreased. If such indication exists, the recoverable amount of the asset or
CGU to which the asset belongs is estimated, and, if there has been an increase in the recoverable amount, the impairment
loss previously recognized is reversed. Where an impairment loss is subsequently reversed, the carrying amount of the
asset is increased to the lesser of the revised estimate of its recoverable amount or the carrying amount that would have
been determined (net of depreciation) had no impairment loss been recognized previously. A reversal of an impairment
loss is recognized in net earnings. 

F16 TRANSALTA CORPORATION

F16

TransAlta Corporation    |    2017  Annual Integrated ReportNotes to Consolidated Financial Statements

Goodwill arising in a business combination is recognized as an asset at the date control is acquired. Goodwill is measured
as the cost of an acquisition plus the amount of any non-controlling interest in the acquiree (if applicable) less the fair value
J. Goodwill
of the related identifiable assets acquired and liabilities assumed.

Goodwill is not subject to amortization, but is tested for impairment at least annually, or more frequently, if an analysis of
events and circumstances indicate that a possible impairment may exist. These events could include a significant change
in  financial  position  of  the  CGUs  or  groups  of  CGUs  to  which  the  goodwill  relates  or  significant  negative  industry  or
economic trends. For impairment purposes, goodwill is allocated to each of the Corporation’s CGUs or groups of CGUs
that  are  expected  to  benefit  from  the  synergies  of  the  business  combination  in  which  the  goodwill  arose.  To  test  for
impairment, the recoverable amount of the CGUs or groups of CGUs to which the goodwill relates is compared to its carrying
amount.  If  the  recoverable  amount  is  less  than  the  carrying  amount,  an  impairment  loss  is  recognized  in  net  earnings
immediately, by first reducing the carrying amount of the goodwill, and then by reducing the carrying amount of the other
assets in the unit. An impairment loss recognized for goodwill is not reversed in subsequent periods.

Project development costs include external, direct, and incremental costs that are necessary for completing an acquisition
or construction project. These costs are recognized as operating expenses until construction of a plant or acquisition of an
K. Project Development Costs
investment is likely to occur, there is reason to believe that future costs are recoverable, and that efforts will result in future
value to the Corporation, at which time the costs incurred subsequently are included in other assets. The appropriateness
of capitalization of these costs is evaluated each reporting period, and amounts capitalized for projects no longer probable
of occurring are charged to net earnings.

The Corporation uses the liability method of accounting for income taxes. Under the liability method, deferred income tax
assets and liabilities are recognized on the differences between the carrying amounts of assets and liabilities and their
L. Income Taxes
respective income tax basis (temporary differences). A deferred income tax asset may also be recognized for the benefit
expected from unused tax credits and losses available for carryforward, to the extent that it is probable that future taxable
earnings will be available against which the tax credits and losses can be applied. Deferred income tax assets and liabilities
are measured based on income tax rates and tax laws that are enacted or substantively enacted by the end of the reporting
period and that are expected to apply in the years in which temporary differences are expected to be realized or settled.
Deferred income tax is charged or credited to net earnings, except when related to items charged or credited to either OCI
or directly to equity. The carrying amount of deferred income tax assets is evaluated at the end of each reporting period
and is reduced to the extent that it is no longer probable that sufficient taxable income will be available to allow all or part
of the asset to be realized.

Deferred income tax liabilities are recognized for taxable temporary differences arising on investments in subsidiaries,
except  where  the  Corporation  is  able  to  control  the  reversal  of  the  temporary  difference  and  it  is  probable  that  the
temporary difference will not reverse in the foreseeable future. 

The  Corporation  has  defined  benefit  pension  and  other  post-employment  benefit  plans.  The  current  service  cost  of
providing benefits under the defined benefit plans is determined using the projected unit credit method pro-rated based
M. Employee Future Benefits
on service. The net interest cost is determined by applying the discount rate to the net defined benefit liability. The discount
rate used to determine the present value of the defined benefit obligation, and the net interest cost, is determined by
reference to market yields at the end of the reporting period on high-quality corporate bonds with terms and currencies
that match the estimated terms and currencies of the benefit obligations. Remeasurements, which include actuarial gains
and losses and the return on plan assets (excluding net interest), are recognized through OCI in the period in which they
occur.  Actuarial  gains  and  losses  arise  from  experience  adjustments  and  changes  in  actuarial  assumptions.
Remeasurements are not reclassified to profit or loss, from OCI, in subsequent periods.

TRANSALTA CORPORATION F17

F17

TransAlta Corporation    |    2017  Annual Integrated Report 
Notes to Consolidated Financial Statements

Gains or losses arising from either a curtailment or settlement of a defined benefit plan are recognized when the curtailment
or settlement occurs. When the restructuring of a benefit plan gives rise to a curtailment and a settlement of obligations,
the curtailment is accounted for prior to the settlement.

In determining whether statutory minimum funding requirements of the Corporation’s defined benefit pension plans give
rise to recording an additional liability, letters of credit provided by the Corporation as security are considered to alleviate
the funding requirements. No additional liability results in these circumstances.

Contributions payable under defined contribution pension plans are recognized as a liability and an expense in the period
in which the services are rendered.

Provisions are recognized when the Corporation has a present obligation (legal or constructive) as a result of a past event,
it is probable that the Corporation will be required to settle the obligation, and a reliable estimate can be made of the
N. Provisions
amount of the obligation. A legal obligation can arise through a contract, legislation, or other operation of law. A constructive
obligation arises from an entity’s actions whereby through an established pattern of past practice, published policies, or a
sufficiently specific current statement, the entity has indicated it will accept certain responsibilities and has thus created
a valid expectation that it will discharge those responsibilities. The amount recognized as a provision is the best estimate,
remeasured at each period-end, of the expenditures required to settle the present obligation, considering the risks and
uncertainties associated with the obligation. Where expenditures are expected to be incurred in the future, the obligation
is measured at its present value using a current market-based, risk-adjusted interest rate.

The Corporation records a decommissioning and restoration provision for all generating facilities and mine sites for which
it is legally or constructively required to remove the facilities at the end of their useful lives and restore the plant or mine
sites. For some hydro facilities, the Corporation is required to remove the generating equipment, but is not required to
remove  the  structures.  Initial  decommissioning  provisions  are  recognized  at  their  present  value  when  incurred.  Each
reporting date, the Corporation determines the present value of the provision using the current discount rates that reflect
the time value of money and associated risks. The Corporation recognizes the initial decommissioning and restoration
provisions, as well as changes resulting from revisions to cost estimates and period-end revisions to the market-based,
risk-adjusted discount rate, as a cost of the related PP&E (see Note 2(G)). The accretion of the net present value discount
is charged to net earnings each period and is included in net interest expense. Where the Corporation expects to receive
reimbursement from a third party for a portion of future decommissioning costs, the reimbursement is recognized as a
separate  asset  when  it  is  virtually  certain  that  the  reimbursement  will  be  received.  Decommissioning  and  restoration
obligations for coal mines are incurred over time as new areas are mined, and a portion of the provision is settled over time
as  areas  are  reclaimed  prior  to  final  pit  reclamation.  Reclamation  costs  for  mining  assets  are  recognized  on  a  unit-of-
production basis.

Changes  in  other  provisions  resulting  from  revisions  to  estimates  of  expenditures  required  to  settle  the  obligation  or
period-end revisions to the market-based, risk-adjusted discount rate are recognized in net earnings. The accretion of the
net present value discount is charged to net earnings each period and is included in net interest expense.

The Corporation measures share-based awards compensation expense at grant date fair value and recognizes the expense
over the vesting period based on the Corporation’s estimate of the number of units that will eventually vest. Any award
O. Share-Based Payments
that vests in installments is accounted for as a separate award with its own distinct fair value measurement.

Compensation expense associated with equity-settled and cash-settled awards are recognized within equity and liability,
respectively. The liability associated with cash-settled awards is remeasured to fair value at each reporting date up to, and
including, the settlement date, with changes in fair value recognized within compensation expense.

F18 TRANSALTA CORPORATION

F18

TransAlta Corporation    |    2017  Annual Integrated Report 
Notes to Consolidated Financial Statements

Emission credits and allowances are recorded as inventory at cost. Those purchased for use by the Corporation are recorded
at cost and are carried at the lower of weighted average cost and net realizable value. Credits granted to, or internally
P. Emission Credits and Allowances
generated by, TransAlta are recorded at nil. Emission liabilities are recorded using the best estimate of the amount required
by the Corporation to settle its obligation in excess of government-established caps and targets. To the extent compliance
costs are recoverable under the terms of contracts with third parties, the amounts are recognized as revenue in the period
of recovery.

Emission credits and allowances that are held for trading and that meet the definition of a derivative are accounted for
using the fair value method of accounting. Emission credits and allowances that do not satisfy the criteria of a derivative
are accounted for using the accrual method.

Assets are classified as held for sale if their carrying amount will be recovered primarily through a sale as opposed to
continued use by the Corporation. Assets classified as held for sale are measured at the lower of their carrying amount and
Q. Assets Held for Sale
fair value less costs of disposal. Any impairment is recognized in net earnings. Depreciation and equity accounting ceases
when an asset or equity investment, respectively, is classified as held for sale. Assets classified as held for sale are reported
as current assets in the Consolidated Statements of Financial Position.

A lease is an arrangement whereby the lessor conveys to the lessee, in return for a payment or series of payments, the right
to use an asset for an agreed period of time. 
R. Leases

Power purchase arrangements (“PPA”) and other long-term contracts may contain, or may be considered, leases where the
fulfillment of the arrangement is dependent on the use of a specific asset (e.g., a generating unit) and the arrangement
conveys to the customer the right to use that asset.

Where the Corporation determines that the contractual provisions of a contract contain, or are, a lease and result in the
customer assuming the principal risks and rewards of ownership of the asset, the arrangement is a finance lease. Assets
subject to finance leases are not reflected as PP&E and the net investment in the lease, represented by the present value
of the amounts due from the lessee, is recorded in the Consolidated Statements of Financial Position as a financial asset,
classified as a finance lease receivable. The payments considered to be part of the leasing arrangement are apportioned
between a reduction in the lease receivable and finance lease income. The finance lease income element of the payments
is recognized using a method that results in a constant rate of return on the net investment in each period and is reflected
in finance lease income on the Consolidated Statements of Earnings (Loss).

Where the Corporation determines that the contractual provisions of a contract contain, or are, a lease and result in the
Corporation retaining the principal risks and rewards of ownership of the asset, the arrangement is an operating lease. For
operating leases, the asset is, or continues to be, capitalized as PP&E and depreciated over its useful life. Rental income,
including contingent rent, from operating leases is recognized over the term of the arrangement and is reflected in revenue
on the Consolidated Statements of Earnings (Loss). Contingent rent may arise when payments due under the contract are
not fixed in amount but vary based on a future factor such as the amount of use or production.

Leasing or other contractual arrangements that transfer substantially all of the risks and rewards of ownership to the
Corporation are considered finance leases. A leased asset and lease obligation are recognized at the lower of the fair value
or the present value of the minimum lease payments. Lease payments are apportioned between interest expense and a
reduction  of  the  lease  liability.  Contingent  rents  are  charged  as  expenses  in  the  periods  incurred.  The  leased  asset  is
depreciated over the shorter of the estimated useful life of the asset and the lease term.

TRANSALTA CORPORATION F19

F19

TransAlta Corporation    |    2017  Annual Integrated Report 
 
Notes to Consolidated Financial Statements

TransAlta  capitalizes  borrowing  costs  that  are  directly  attributable  to,  or  relate  to  general  borrowings  used  for,  the
construction of qualifying assets. Qualifying assets are assets that take a substantial period of time to prepare for their
S. Borrowing Costs
intended use and typically include generating facilities or other assets that are constructed over periods of time exceeding
12 months. Borrowing costs are considered to be directly attributable if they could have been avoided if the expenditure
on the qualifying asset had not been made. Borrowing costs that are capitalized are included in the cost of the related PP&E
component. Capitalization of borrowing costs ceases when substantially all the activities necessary to prepare the asset
for its intended use are complete. 

All other borrowing costs are expensed in the period in which they are incurred.

Non-controlling interests arise from business combinations in which the Corporation acquires less than a 100 per cent
interest.  Non-controlling  interests  are  initially  measured  at  either  fair  value  or  at  the  non-controlling  interest’s
T. Non-Controlling Interests
proportionate share of the acquiree’s identifiable net assets. The Corporation determines on a transaction by transaction
basis  which  measurement  method  is  used.  Non-controlling  interests  also  arise  from  other  contractual  arrangements
between  the  Corporation  and  other  parties,  whereby  the  other  party  has  acquired  an  interest  in  a  specified  asset  or
operation, and the Corporation retains control.

Subsequent  to  acquisition,  the  carrying  amount  of  non-controlling  interests  is  increased  or  decreased  by  the  non-
controlling  interest’s  share  of  subsequent  changes  in  equity  and  payments  to  the  non-controlling  interest.  Total
comprehensive income is attributed to the non-controlling interests even if this results in the non-controlling interests
having a negative balance.

A  joint  arrangement  is  a  contractual  arrangement  that  establishes  the  terms  by  which  two  or  more  parties  agree  to
undertake and jointly control an economic activity. TransAlta’s joint arrangements are generally classified as two types:
U. Joint Arrangements
joint operations and joint ventures.

A joint operation arises when the parties that have joint control have rights to the assets and obligations for the liabilities
relating to the arrangement. Generally, each party takes a share of the output from the asset and each bears an agreed
upon share of the costs incurred in respect of the joint operation. The Corporation reports its interests in joint operations
in its consolidated financial statements using the proportionate consolidation method by recognizing its share of the assets,
liabilities, revenues, and expenses in respect of its interest in the joint operation.

In a joint venture, the venturers do not have rights to individual assets or obligations of the venture. Rather, each venturer
has rights to the net assets of the arrangement. The Corporation reports its interests in joint ventures using the equity
method. Under the equity method, the investment is initially recognized at cost and the carrying amount is increased or
decreased to recognize the Corporation’s share of the joint venture’s net earnings or loss after the date of acquisition. The
impact of transactions between the Corporation and joint ventures is eliminated based on the Corporation’s ownership
interest. Distributions received from joint ventures reduce the carrying amount of the investment. Any excess of the cost
of an acquisition less the fair value of the recognized identifiable assets, liabilities, and contingent liabilities of an acquired
joint  venture  is  recognized  as  goodwill  and  is  included  in  the  carrying  amount  of  the  investment  and  is  assessed  for
impairment as part of the investment.

Investments  in  joint  ventures  are  evaluated  for  impairment  at  each  reporting  date  by  first  assessing  whether  there  is
objective evidence that the investment is impaired. If such objective evidence is present, an impairment loss is recognized
if the investment’s recoverable amount is less than its carrying amount. The investment’s recoverable amount is determined
as the higher of value in use and fair value less costs of disposal. 

F20 TRANSALTA CORPORATION

F20

TransAlta Corporation    |    2017  Annual Integrated Report 
 
 
Notes to Consolidated Financial Statements

Government  incentives  are  recognized  when  the  Corporation  has  reasonable  assurance  that  it  will  comply  with  the
conditions associated with the incentive and that the incentive will be received. When the incentive relates to an expense
V. Government Incentives
item, it is recognized in net earnings over the same period in which the related costs or revenues are recognized. When the
incentive relates to an asset, it is recognized as a reduction of the carrying amount of PP&E and released to earnings as a
reduction in depreciation over the expected useful life of the related asset.

Basic  earnings  per  share  is  calculated  by  dividing  net  earnings  attributable  to  common  shareholders  by  the  weighted
average number of common shares outstanding in the year.
W. Earnings per Share

Diluted earnings per share is calculated by dividing net earnings attributable to common shareholders, adjusted for the
after-tax  effects  of  dividends,  interest,  or  other  changes  in  net  earnings  that  would  result  from  potential  dilutive
instruments, by the weighted average number of common shares outstanding in the year, adjusted for additional common
shares that would have been issued on the conversion of all potential dilutive instruments.

Transactions in which the acquisition constitutes a business are accounted for using the acquisition method. Identifiable
assets acquired and liabilities assumed are measured at their acquisition date fair values. Goodwill is measured as the
X. Business Combinations
excess of the fair value of consideration transferred less the fair value of the identifiable assets acquired and liabilities
assumed. 

Acquisition-related costs to effect the business combination, with the exception of costs to issue debt or equity securities,
are recognized in net earnings as incurred.

A mine stripping activity asset is recognized when all of the following are met: i) it is probable that the future benefit
associated with improved access to the coal reserves associated with the stripping activity will be realized; ii) the component
Y. Stripping Costs
of the coal reserve to which access has been improved can be identified; and iii) the costs related to the stripping activity
associated with that component can be measured reliably. Costs include those directly incurred to perform the stripping
activity as well as an allocation of directly attributable overheads. The resulting stripping activity asset is amortized on a
unit-of-production basis over the expected useful life of the identified component that it relates to. The amortization is
recognized as a component of the standard cost of coal inventory. 

The preparation of financial statements requires management to make judgments, estimates, and assumptions that could
affect the reported amounts of assets, liabilities, revenues, expenses, and disclosures of contingent assets and liabilities
Z. Significant Accounting Judgments and Key Sources of Estimation Uncertainty
during the period. These estimates are subject to uncertainty. Actual results could differ from those estimates due to factors
such as fluctuations in interest rates, foreign exchange rates, inflation and commodity prices, and changes in economic
conditions, legislation, and regulations.

In the process of applying the Corporation’s accounting policies, management has to make judgments and estimates about
matters that are highly uncertain at the time the estimate is made and that could significantly affect the amounts recognized
in the consolidated financial statements. Different estimates with respect to key variables used in the calculations, or
changes to estimates, could potentially have a material impact on the Corporation’s financial position or performance. The
key judgments and sources of estimation uncertainty are described below:

TRANSALTA CORPORATION F21

F21

TransAlta Corporation    |    2017  Annual Integrated Report 
 
 
 
 
Notes to Consolidated Financial Statements

I. Impairment of PP&E and Goodwill
Impairment exists when the carrying amount of an asset, CGU or group of CGUs to which goodwill relates exceeds its
recoverable amount, which is the higher of its fair value less costs of disposal and its value in use. An assessment is made
at each reporting date as to whether there is any indication that an impairment loss may exist or that a previously recognized
impairment loss may no longer exist or may have decreased. In determining fair value less costs of disposal, information
about  third-party  transactions  for  similar  assets  is  used  and  if  none  is  available,  other  valuation  techniques,  such  as
discounted cash flows, are used. Value in use is computed using the present value of management’s best estimates of future
cash flows based on the current use and present condition of the asset. In estimating either fair value less costs of disposal
or value in use using discounted cash flow methods, estimates and assumptions must be made about sales prices, cost of
sales, production, fuel consumed, capital expenditures, retirement costs, and other related cash inflows and outflows over
the life of the facilities, which can range from 30 to 60 years. In developing these assumptions, management uses estimates
of contracted and future market prices based on expected market supply and demand in the region in which the plant
operates, anticipated production levels, planned and unplanned outages, changes to regulations, and transmission capacity
or constraints for the remaining life of the facilities. Discount rates are determined by employing a weighted average cost
of capital methodology that is based on capital structure, cost of equity, and cost of debt assumptions based on comparable
companies with similar risk characteristics and market data as the asset, CGU, or group of CGUs subject to the test. These
estimates and assumptions are susceptible to change from period to period and actual results can, and often do, differ from
the estimates, and can have either a positive or negative impact on the estimate of the impairment charge, and may be
material. The impairment outcome can also be impacted by the determination of CGUs or groups of CGUs for asset and
goodwill impairment testing. A CGU is the smallest identifiable group of assets that generates cash inflows that are largely
independent of the cash inflows from other assets or groups of assets, and goodwill is allocated to each CGU or group of
CGUs that is expected to benefit from the synergies of the acquisition from which the goodwill arose. The allocation of
goodwill is reassessed upon changes in the composition of segments, CGUs, or groups of CGUs. In respect of determining
CGUs, significant judgment is required to determine what constitutes independent cash flows between power plants that
are  connected  to  the  same  system.  The  Corporation  evaluates  the  market  design,  transmission  constraints,  and  the
contractual profile of each facility, as well as the Corporation’s own commodity price risk management plans and practices,
in order to inform this determination. With regard to the allocation or reallocation of goodwill, significant judgment is
required to evaluate synergies and their impacts. Minimum thresholds also exist with respect to segmentation and internal
monitoring  activities.  The  Corporation  evaluates  synergies  with  regards  to  opportunities  from  combined  talent  and
technology, functional organization, future growth potential, and considers its own performance measurement processes
in making this determination. Information regarding significant judgments and estimates in respect of impairment during
2015 to 2017 is found in Notes 6 and 17.

II. Leases
In determining whether the Corporation’s PPAs and other long-term electricity and thermal sales contracts contain, or are,
leases, management must use judgment in assessing whether the fulfillment of the arrangement is dependent on the use
of a specific asset and the arrangement conveys the right to use the asset. For those agreements considered to contain, or
be,  leases,  further  judgment  is  required  to  determine  whether  substantially  all  of  the  significant  risks  and  rewards  of
ownership are transferred to the customer or remain with the Corporation, to appropriately account for the agreement
as  either  a  finance  or  operating  lease.  These  judgments  can  be  significant  and  impact  how  the  Corporation  classifies
amounts related to the arrangement as either PP&E or as a finance lease receivable on the Consolidated Statements of
Financial  Position,  and  therefore  the  amount  of  certain  items  of  revenue  and  expense  is  dependent  upon  such
classifications.

F22 TRANSALTA CORPORATION

F22

TransAlta Corporation    |    2017  Annual Integrated ReportNotes to Consolidated Financial Statements

III. Income Taxes
Preparation of the consolidated financial statements involves determining an estimate of, or provision for, income taxes in
each of the jurisdictions in which the Corporation operates. The process also involves making an estimate of income taxes
currently payable and income taxes expected to be payable or recoverable in future periods, referred to as deferred income
taxes. Deferred income taxes result from the effects of temporary differences due to items that are treated differently for
tax and accounting purposes. The tax effects of these differences are reflected in the Consolidated Statements of Financial
Position as deferred income tax assets and liabilities. An assessment must also be made to determine the likelihood that
the Corporation’s future taxable income will be sufficient to permit the recovery of deferred income tax assets. To the
extent that such recovery is not probable, deferred income tax assets must be reduced. Management uses the Corporation’s
long-range  forecasts  as  a  basis  for  evaluation  of  recovery  of  deferred  income  tax  assets.  Management  must  exercise
judgment in its assessment of continually changing tax interpretations, regulations, and legislation to ensure deferred
income  tax  assets  and  liabilities  are  complete  and  fairly  presented.  Differing  assessments  and  applications  than  the
Corporation’s estimates could materially impact the amounts recognized for deferred income tax assets and liabilities. See
Note 10 for further details on the impacts of the Corporation’s tax policies.

IV. Financial Instruments and Derivatives
The Corporation’s financial instruments and derivatives are accounted for at fair value, with the initial and subsequent
changes  in  fair  value  affecting  earnings  in  the  period  the  change  occurs.  The  fair  values  of  financial  instruments  and
derivatives are classified within three levels, with Level III fair values determined using inputs for the asset or liability that
are  not  readily  observable.  These  fair  value  levels  are  outlined  and  discussed  in  more  detail  in  Note  13.  Some  of  the
Corporation’s fair values are included in Level III because they are not traded on an active exchange or have terms that
extend beyond the time period for which exchange-based quotes are available and require the use of internal valuation
techniques or models to determine fair value.

The determination of the fair value of these contracts and derivative instruments can be complex and relies on judgments
and estimates concerning future prices, volatility, and liquidity, among other factors. These fair value estimates may not
necessarily be indicative of the amounts that could be realized or settled, and changes in these assumptions could affect
the reported fair value of financial instruments. Fair values can fluctuate significantly and can be favourable or unfavourable
depending  on  current  market  conditions.  Judgment  is  also  used  in  determining  whether  a  highly  probable  forecasted
transaction  designated  in  a  cash  flow  hedge  is  expected  to  occur  based  on  the  Corporation’s  estimates  of  pricing  and
production to allow the future transaction to be fulfilled.

V. Project Development Costs
Project development costs are capitalized in accordance with the accounting policy in Note 2(K). Management is required
to use judgment to determine if there is reason to believe that future costs are recoverable, and that efforts will result in
future value to the Corporation, in determining the amount to be capitalized.

VI. Provisions for Decommissioning and Restoration Activities
TransAlta recognizes provisions for decommissioning and restoration obligations as outlined in Note 2(N) and Note 20.
Initial decommissioning provisions, and subsequent changes thereto, are determined using the Corporation’s best estimate
of the required cash expenditures, adjusted to reflect the risks and uncertainties inherent in the timing and amount of
settlement.  The  estimated  cash  expenditures  are  present  valued  using  a  current,  risk-adjusted,  market-based,  pre-tax
discount rate. A change in estimated cash flows, market interest rates, or timing could have a material impact on the carrying
amount of the provision.

VII. Useful Life of PP&E
Each significant component of an item of PP&E is depreciated over its estimated useful life. Estimated useful lives are
determined based on current facts and past experience, and take into consideration the anticipated physical life of the
asset, existing long-term sales agreements and contracts, current and forecasted demand, the potential for technological
obsolescence,  and  regulations.  The  useful  lives  of  PP&E  are  reviewed  at  least  annually  to  ensure  they  continue  to  be
appropriate. Information on changes in useful lives of facilities is disclosed in Note 3(A).

TRANSALTA CORPORATION F23

F23

TransAlta Corporation    |    2017  Annual Integrated ReportNotes to Consolidated Financial Statements

VIII. Employee Future Benefits
The Corporation provides pension and other post-employment benefits, such as health and dental benefits, to employees.
The cost of providing these benefits is dependent upon many factors, including actual plan experience and estimates and
assumptions about future experience.

The liability for pension and post-employment benefits and associated costs included in annual compensation expenses
are impacted by estimates related to: 

▪

▪
▪

employee demographics, including age, compensation levels, employment periods, the level of contributions made to
the plans, and earnings on plan assets,;
the effects of changes to the provisions of the plans; and
changes in key actuarial assumptions, including rates of compensation and health-care cost increases, and discount
rates.

Due to the complexity of the valuation of pension and post-employment benefits, a change in the estimate of any one of
these factors could have a material effect on the carrying amount of the liability for pension and other post-employment
benefits or the related expense. These assumptions are reviewed annually to ensure they continue to be appropriate. See
Note 27 for disclosures on employee future benefits.

IX. Other Provisions
Where  necessary,  TransAlta  recognizes  provisions  arising  from  ongoing  business  activities,  such  as  interpretation  and
application  of  contract  terms,  ongoing  litigation,  and  force  majeure  claims.  These  provisions,  and  subsequent  changes
thereto, are determined using the Corporation’s best estimate of the outcome of the underlying event and can also be
impacted by determinations made by third parties, in compliance with contractual requirements. The actual amount of the
provisions that may be required could differ materially from the amount recognized. More information is disclosed in Notes
4 and 20 with respect to other provisions.

3. Accounting Changes
Change in Estimates - Useful Lives
A. Current Accounting Changes
As a result of the Off-Coal Agreement (“OCA”) with the Government of Alberta described in Note 4(H), the Corporation
will cease coal-fired emissions by the end of 2030. On Jan. 1, 2017, the useful lives of the PP&E and amortizable intangibles
associated with some of the Corporation’s Alberta coal assets were reduced to 2030. As a result, depreciation expense and
intangibles amortization for the year ended Dec. 31, 2017, increased by approximately $58 million. The useful lives may
be  revised  or  extended  in  compliance  with  the  Corporation’s  accounting  policies,  dependent  upon  future  operating
decisions and events, such as coal-to-gas conversions.

Due to the Corporation’s decision to retire Sundance Unit 1 effective Jan. 1, 2018 (see Note 4(B) for further details), the
useful lives of the Sundance Unit 1 PP&E and amortizable intangibles were reduced in the second quarter of 2017 by two
years to Dec. 31, 2017. As a result, depreciation expense and intangibles amortization for the year ended Dec. 31, 2017,
increased by approximately $26 million.

Since Sundance Unit 1 will be shut down two years early, the federal Minister of Environment has agreed to extend the life
of Sundance Unit 2 from 2019 to 2021. As such, during the third quarter of 2017, the Corporation extended the life of
Sundance Unit 2 to 2021 (see Note 4(B) for further details). As a result, depreciation expense and intangibles amortization
for the year ended Dec. 31, 2017 decreased in total by approximately $4 million.

F24 TRANSALTA CORPORATION

F24

TransAlta Corporation    |    2017  Annual Integrated Report 
 
Notes to Consolidated Financial Statements

Accounting standards that have been previously issued by the IASB, but are not yet effective and have not been applied
by the Corporation include:
B.  Future Accounting Changes

I. IFRS 15 Revenue from Contracts with Customers
In May 2014, the IASB issued IFRS 15 Revenue from Contracts with Customers, which replaces existing revenue recognition
guidance with a single comprehensive accounting model. The model specifies that an entity recognizes revenue when it
transfers promised goods or services to customers in an amount that reflects the consideration to which it expects to be
entitled in exchange for those goods or services. In April 2016, the IASB issued an amendment to IFRS 15 to clarify the
identification  of  performance  obligations,  principal  versus  agent  considerations,  licenses  of  intellectual  property,  and
transition practical expedients. IFRS 15, including the amendment, is required to be adopted either retrospectively or using
a modified retrospective approach for annual periods beginning on or after Jan. 1, 2018, with earlier adoption permitted.
IFRS 15 will be applied by the Corporation on Jan. 1, 2018.

The Corporation has completed the review and accounting assessment of its revenue streams and underlying contracts
with customers and the quantification of impacts. The majority of the Corporation’s revenues within the scope of IFRS 15
are earned through the sale of capacity and energy under both long-term arrangements and merchant mechanisms, and
from the sale of renewable energy certificates. IFRS 15 requires the application of a five-step model to determine when to
recognize revenue, and at what amount. The model specifies that an entity recognizes revenue when it transfers promised
goods or services to customers in an amount that reflects the consideration to which it expects to be entitled in exchange
for those goods or services. Depending on whether certain criteria are met, revenue is recognized either over time, in a
manner  that  depicts  the  entity’s  performance,  or  at  a  point  in  time,  when  control  is  transferred  to  the  customer.  The
Corporation has not identified any significant differences in the timing or amount of recognition of revenue as a result of
IFRS 15, with the exception of one difference, as discussed below. 

IFRS 15 requires that, in determining the transaction price, the promised amount of consideration is to be adjusted for the
effects of the time value of money if the timing of payments specified in a contract provides either party with a significant
benefit of financing the transfer of goods or services to the customer (“significant financing component”). The objective
when adjusting the promised amount of consideration for a significant financing component is to recognize revenue at an
amount that reflects the price that the customer would have paid, had they paid cash in the future when the goods or
services are transferred to them. The Corporation was required to apply this to one of the Corporation's contracts with a
customer.  The  application  of  the  significant  financing  component  requirements  results  in  the  recognition  of  interest
expense over the financing period and a higher amount of revenue. 

The Corporation has chosen to apply the modified retrospective method of transition. Under this method, the comparative
periods presented in the consolidated financial statements as at and for the year ended Dec. 31, 2018, will not be restated.
Instead, the Corporation will recognize the cumulative impact of the initial application of the standard in retained earnings
as at Jan. 1, 2018.  The cumulative impact of applying the significant financing component requirements to the identified
contract results in a $12 million (net of tax impacts) charge to retained earnings.

II. IFRS 9 Financial Instruments
In  July  2014,  the  IASB  issued  the  final  version  of  IFRS  9,  which  replaces  IAS  39  Financial  Instruments:  Recognition  and
Measurement. IFRS 9 includes guidance on the classification and measurement of financial assets and financial liabilities,
impairment of financial assets, and a new hedge accounting model. IFRS 9 is required to be adopted retrospectively for
annual periods beginning on or after Jan. 1, 2018 with early adoption permitted. IFRS 9 will be adopted by the Corporation
on Jan. 1, 2018.

TRANSALTA CORPORATION F25

F25

TransAlta Corporation    |    2017  Annual Integrated Report 
 
 
Notes to Consolidated Financial Statements

Under the new classification and measurement requirements, financial assets must be classified and measured at either
amortized cost, at fair value through profit or loss, or through OCI. The classification and measurement depends on the
contractual cash flow characteristics of the financial asset and the entity’s business model for managing the financial asset.
The  classification  requirements  for  financial  liabilities  are  largely  unchanged  from  IAS  39.  Based  on  the  assessment
performed to date, the Corporation’s classification and measurement of financial assets is not expected to be materially
affected by the initial application of IFRS 9.

The new general hedge accounting model is intended to be simpler and more closely focused on how an entity manages its
risks, replaces the IAS 39 effectiveness testing requirements with the principle of an economic relationship, and eliminates
the requirement for retrospective assessment of hedge effectiveness. Based on its assessment to date, the Corporation is
not expected to be materially affected by the new general hedge accounting model. However, where the Corporation uses
foreign exchange forward contracts to hedge anticipated payments in foreign currency, and the hedged transaction results
in a non-financial item, the reclassification of gains or losses on the hedges will be presented directly in the Statement of
Changes in Equity as a reclassification from accumulated other comprehensive income. 

The Corporation has completed its implementation plan, which included reviewing its various types of financial instruments
to determine the impact of the new classification guidance, and assessing the historical credit loss data as well as considering
reasonable and supportable forward-looking information that was available without undue cost or effort. There are no
significant changes to classification and measurement identified. The Corporation is not expected to be materially impacted
by the initial implementation of the expected credit loss impairment model. Ongoing disclosures are expected to be more
extensive  and  will  include  information  about  the  Corporation’s  risk  management  strategy,  how  the  risk  management
activities may affect the amount, timing and uncertainty of future cash flows and the effect that hedge accounting has had
on the statement of financial position, the statement of comprehensive income and the statement of changes in equity.

III. IFRS 16 Leases
In  January 2016,  the  IASB  issued  IFRS  16  Leases,  which  replaces  the  current  IFRS  guidance  on  leases.  Under  current
guidance, lessees are required to determine if the lease is a finance or operating lease, based on specified criteria. Finance
leases are recognized on the statement of financial position, while operating leases are not. Under IFRS 16, lessees must
recognize a lease liability and a right-of-use asset for virtually all lease contracts. An optional exemption to not recognize
certain short-term leases and leases of low value can be applied by lessees. For lessors, the accounting remains essentially
unchanged.  IFRS 16 is effective for annual periods beginning on or after Jan. 1, 2019, with early application permitted if
IFRS 15 is also applied at the same time. The standard is required to be adopted either retrospectively or using a modified
retrospective approach. IFRS 16 will be applied by the Corporation on Jan. 1, 2019.

We are in the process of completing an initial scoping assessment for IFRS 16 and have prepared a detailed project plan.
We anticipate that most of the effort under the implementation plan will occur in mid-to-late 2018. It is not yet possible
to make reliable estimates of the potential impact of IFRS 16 on our financial statements and disclosures. 

Certain comparative figures have been reclassified to conform to the current period’s presentation. These reclassifications
did not impact previously reported net earnings.
C. Comparative Figures

F26 TRANSALTA CORPORATION

F26

TransAlta Corporation    |    2017  Annual Integrated Report 
 
Notes to Consolidated Financial Statements

4. Significant Events
A. Balancing Pool Provides Notice to Terminate the Alberta Sundance Power Purchase
On Sept 18. 2017, the Corporation received formal notice from the Balancing Pool for the termination of the Sundance B
and C Power Purchase Arrangements (“Sundance PPAs”) effective March 31, 2018.
Arrangements 

The termination of the Sundance PPAs by the Balancing Pool was expected and the Corporation is working to ensure it
receives the termination payment that it believes it is entitled to under the Sundance PPAs and applicable legislation. The
expected impacts of the termination include approximately $215 million in compensation for the net book value of the
assets as compared to the Balancing Pool’s estimate of approximately $157 million. The Balancing Pool’s estimate differs
because it excludes certain mining assets that the Corporation believes should be included in the net book value calculation.

I. Sundance and Keephills Units 1 and 2 Coal-to-Gas Conversion Strategy
On Dec. 6, 2017, the Corporation updated its strategy to accelerate its transition to gas and renewables generation. The
B. Transition to Clean Power in Alberta and Sundance Unit 1 Impairment Charge
strategy includes mothballing and retiring the following Sundance Units:
▪
▪
▪
▪
▪

retiring of Sundance Unit 1 effective Jan. 1, 2018;
temporarily mothballing Sundance Unit 2 effective Jan. 1, 2018, for a period of up to two years; 
temporarily mothballing Sundance Unit 3 effective April 1, 2018, for a period of up to two years;
temporarily mothballing Sundance Unit 4 effective April 1, 2019, for a period of up to two years; and
temporarily mothballing Sundance Unit 5 effective April 1, 2018, for a period of up to one year.

As a result of  the clarity provided by the draft coal-to-gas conversion rules proposed by the Government of Canada, the
Corporation has determined to accelerate the conversion of Sundance Units 3 to 6 and Keephills Units 1 and 2 from coal-
fired generation to gas-fired generation in the 2021 to 2022 timeframe, a year earlier than originally planned. Although
not yet finalized, the Government of Canada has proposed coal-to-gas conversion rules that would extend the life of the
Corporation's gas conversion units by five to ten years past their federal end of coal life, depending on their CO2 emissions
profile.  The  proposed  rules  would  see  the  life  of  TransAlta’s  entire  coal-fired  fleet  extended  by  an  aggregate  of
approximately 75 years. In addition to extending their operating lives, the benefits of converting units to gas generation
include  significantly  lowering  carbon  intensities,  emissions,  and  costs;  significantly  lowering  operating  and  sustaining
capital costs; and increasing operating flexibility.

Temporarily mothballing the combination of Sundance Units throughout 2018 and 2019 ensures that two Sundance Units
can operate at high-capacity utilizations with lower costs throughout the period to 2020 when additional power will be
needed in the Alberta market. The mothballing of the units will also assist the Corporation in its preparations for converting
Sundance Units 3 to 6 and Keephills Units 1 and 2 from coal-fired generation to gas-fired generation in the 2021 to 2022
timeframe, thereby extending the useful lives of these assets until the mid-2030s.

II. Gas Supply for Coal-to-Gas Conversions
On  Dec.  6,  2017,  the  Corporation  entered  into  a  letter  of  intent  with  Tidewater  Midstream  and  Infrastructure  Ltd.
("Tidewater")  to  construct  a  120-kilometre  natural  gas  pipeline  from  Tidewater's  Brazeau  River  complex  to  the
Corporation's generating units at Sundance and Keephills facilities. The pipeline is expected to provide initial capacity of
130 million cubic feet of gas per day by 2020, and to have expansion capability to 340 million cubic feet of gas per day. The
initial capacity will support fuel blending, using a fuel combination of coal and gas for generation, which will reduce the
marginal cost as well as emissions. The Corporation will have the option to acquire up to a 50 per cent interest in the pipeline,
which, if exercised, would reduce the costs associated with the tolling agreement.

The decision to work with Tidewater advances the timeframe for the construction of a pipeline and permits the acceleration
of plant conversions.  TransAlta remains of the view that having at least two pipelines supplying natural gas would reduce
operational risks and continues to advance discussions with other parties to construct additional pipelines to meet the
remaining gas supply requirements for the facilities. 

TRANSALTA CORPORATION F27

F27

TransAlta Corporation    |    2017  Annual Integrated ReportNotes to Consolidated Financial Statements

III. Sundance Units 1 and 2 
Federal regulations stipulate that all coal plants built before 1975 must cease to operate on coal by the end of 2019, which
includes Sundance Units 1 and 2. Given that Sundance Unit 1 will be shut down two years early, the federal Minister of
Environment has agreed to extend the life of Sundance Unit 2 from 2019 to 2021. This will provide the Corporation with
flexibility to respond to the regulatory environment for coal-to-gas conversions and the new upcoming Alberta capacity
market.

Sundance Units 1 and 2 collectively make up 560 MW of the 2,141 MW capacity of the Sundance power plant, which serves
as a baseload provider for the Alberta electricity system. The PPA with the Balancing Pool relating to Sundance Units 1
and 2 expired on Dec. 31, 2017. 

In the second quarter of 2017, the Corporation recognized an impairment charge on Sundance Unit 1 of $20 million due
to the Corporation’s decision to early retire Sundance Unit 1. See Note 6 for further details.

C. Notice of Termination of South Hedland Power Purchase Agreement from Fortescue Metals Group
On Nov. 13, 2017, the Corporation announced that TEC Hedland Pty Ltd ("TEC Hedland"), a subsidairy of the Corporation,
received formal notice of termination of the South Hedland Power Purchase Agreement ("South Hedland PPA") from a
Limited
subsidiary of Fortescue Metals Group Limited ("FMG"). The South Hedland PPA allows FMG to terminate the agreement
if the power station has not reached commercial operation within a specified time period. FMG continues to be of the view
that South Hedland Power Station has yet to achieve commercial operation. 

The  Corporation  believes  that  all  conditions  required  to  establish  commercial  operations,  including  all  performance
conditions, have been achieved under the terms of the South Hedland PPA. These conditions include receiving a commercial
operation  certificate,  successfully  completing  and  passing  certain  test  requirements,  and  obtaining  all  permits  and
approvals required from the North West Interconnected System and government agencies.

Confirmation of commercial operation has been provided by independent engineering firms, as well as by Horizon Power,
the state-owned utility. The Corporation will take all steps necessary to protect its interests in the facility and ensure all
cash flows promised under the South Hedland PPA are realized.

TEC Hedland commenced proceedings in the Supreme Court of Western Australia on Dec. 4, 2017, to recover amounts
invoiced under the South Hedland PPA.

The South Hedland Power Station has been fully operational and able to meet FMG’s requirements under the terms of the
South Hedland PPA since July 2017.

On Aug. 1, 2017, the Corporation received notice of FMG’s intention to repurchase the Solomon Power Station from TEC
Pipe  Pty  Ltd.  ("TEC  Pipe"),  a  wholly  owned  subsidiary  of  the  Corporation,  for  approximately  US$335  million.  FMG
D. Re-acquisition of Solomon Power Station
completed  its  acquisition  of  the  Solomon  Power  Station  on  Nov.  1,  2017,  and  TEC  Pipe  received  US$325  million  as
consideration. FMG has held back the balance from the purchase price. It is the Corporation’s view that this should not
have been held back and the Corporation is taking action to recover all, or a significant portion of, this amount from FMG.

During the second quarter of 2017, a subsidiary of TransAlta Renewables Inc. ("TransAlta Renewables"), Kent Hills Wind
LP ("KHWLP"), entered into a long-term contract with New Brunswick Power Corporation (“NB Power”) for the sale of all
E. Kent Hills 3 Wind Project
power generated by an additional 17.25 MW of capacity from the Kent Hills 3 wind project.  At the same time, the term of
the Kent Hills 1 contract with NB Power was extended from 2033 to 2035, matching the life of Kent Hills 2 and Kent Hills
3 wind projects.

This is an expansion of the Corporation's existing Kent Hills wind farm, increasing the total operating capacity of the Kent
Hills wind farm to approximately 167 MW. As part of the regulatory process, the Corporation submitted an Environmental
Impact Assessment to the Province of New Brunswick in the third quarter of 2017. The Corporation expects to begin the
construction phase in the spring of 2018.

F28 TRANSALTA CORPORATION

F28

TransAlta Corporation    |    2017  Annual Integrated ReportNotes to Consolidated Financial Statements

F. TransAlta Renewables' $260-Million Project Financing of New Brunswick Wind Assets and Early
On  Oct.  2,  2017,  TransAlta  Renewables  announced  that  its  indirect  majority-owned  subsidiary,  KHWLP,  closed  an
approximate $260 million bond offering, secured by, among other things, a first ranking charge over all assets of KHWLP.
Redemption of Outstanding Debentures
The bonds are amortizing and bear interest at a rate of 4.454 per cent, payable quarterly, and mature on Nov. 30, 2033.  A
portion of the net proceeds will be used to fund a portion of the construction costs for the 17.25 MW Kent Hills 3 wind
project (upon meeting certain completion tests and other specified conditions). The remaining proceeds were advanced
to its subsidiary Canadian Hydro Developers, Inc. ("CHD") and to Natural Forces Technologies Inc., KHWLP’s partner, which
owns approximately 17 per cent of KHWLP. Proceeds of $30 million were classified as restricted cash as at Dec. 31, 2017,
and will be released from the construction reserve account upon commissioning. 

At  the  same  time,  CHD,  a  wholly  owned  subsidiary  of  TransAlta  Renewables,    provided  notice  that  it  would  be  early
redeeming all of its unsecured debentures. The debentures were scheduled to mature in June 2018. On Oct. 12, 2017,
CHD  redeemed  the  unsecured  debentures  for  $201  million,  which  included  the  principal  of  $191  million,  an  early
redemption  premium  of  $6  million,  and  accrued  interest  of  $4  million.  The  $6  million  early  redemption  premium  was
recognized in net interest expense for the year ended Dec. 31, 2017.

On Sept. 17, 2017, the Corporation announced that the minimum election notices received did not meet the requirements
to give effect to the conversion of Series E Preferred Shares into Series F Preferred Shares. As a result, none of the Series
G. Series E and C Preferred Share Conversion Results and Dividend Rate Reset
E Preferred Shares were converted into Series F Preferred Shares on Sept. 30, 2017, and the dividend rate remains fixed
for the subsequent five-year period. See Note 24 for further details.

On June 16, 2017, the Corporation announced that the minimum election notices received did not meet the requirements
to give effect to the conversion of Series C Preferred Shares into the Series D Preferred Shares. As a result, none of the
Series C Preferred Shares were converted into Series D Preferred Shares on June 30, 2017, and the dividend remains fixed
for the subsequent five-year period. See Note 13 for further details.

On Nov. 24, 2016, the Corporation announced that it had entered into an agreement with the Government of Alberta (the
“Government”)  on  transition  payments  for  the  cessation  of  coal-fired  emissions  from  the  Keephills  3,  Genesee  3  and
H. Alberta Off-Coal Agreement
Sheerness coal-fired plants on or before Dec. 31, 2030.

Under the terms of the OCA, the Corporation will receive annual cash payments of approximately $37.4 million, net to the
Corporation,  commencing  in  2017  and  terminating  in  2030.   Receipt  of  the  payments  is  subject  to  certain  terms  and
conditions.  The Off-Coal Agreement’s main condition is the cessation of all coal-fired emissions on or before Dec. 31, 2030.
Other conditions include: maintaining prescribed spending on investment and investment-related activities in Alberta;
maintaining  a  significant  business  presence 
(including  through  the  maintenance  of  prescribed
employment levels); and maintaining spending on programs and initiatives to support the communities surrounding the
plants,  the  employees  of  the  Corporation  negatively  impacted  by  the  phase-out  of  coal  generation,  and  fulfilling  all
obligations to affected employees.  The affected plants are not, however, precluded from generating electricity at any time
by any method, other than the combustion of coal.

in  Alberta 

The Corporation also entered into a Memorandum of Understanding ("MOU") with the Government to collaborate and
co-operate in the development of a policy framework to facilitate coal-to-gas fired conversions and renewable electricity
development, and ensure existing generation is able to effectively participate in a future capacity market to be developed
for the Province of Alberta.

TRANSALTA CORPORATION F29

F29

TransAlta Corporation    |    2017  Annual Integrated Report 
Notes to Consolidated Financial Statements

Keephills 1 tripped off-line on March 5, 2013 due to a suspected winding failure within the generator. After extensive
testing and analysis, it was determined that a full rewind of the generator stator was required. After completing the repairs,
I. Force Majeure Relief - Keephills 1
the unit returned to service on Oct. 6, 2013. The Corporation claimed force majeure relief on March 26, 2013. The buyer,
ENMAX,  disputed  the  claim  of  force  majeure,  which  triggered  the  need  for  an  arbitration  hearing  that  took  place  in
May 2016.  On  Nov. 18,  2016,  the  Corporation  announced  that  the  independent  arbitration  panel  confirmed  the
Corporation’s claim for force majeure relief. Accordingly, the Corporation reversed a provision of approximately $94 million
in 2016. The buyer and the Balancing Pool are seeking to appeal or set the arbitration panel’s decision aside in the Court
of Queen’s Bench of Alberta. TransAlta is opposing these steps and believes they are without merit. No provision has been
recognized with respect to this.

On Dec. 7, 2016, the Corporation announced that its indirect wholly owned subsidiary, TAPC Holdings LP, which holds the
Corporation’s  interest  in  the  Poplar  Creek  cogeneration  facility,  completed  the  private  placement  of  a  $202.5  million
J. Poplar Creek Financing
aggregate principal amount of senior secured floating rate bonds. The bonds, which mature on Dec. 31, 2030, are secured
by a first ranking charge over the equity interests of the issuer of such bonds. The bonds are amortizing and bear interest
for each quarterly interest period at a rate per annum equal to the three-month Canadian Dollar Offered Rate in effect on
the first day of such quarterly interest period plus 395 basis points. 

On Dec. 22, 2016, the Corporation announced it had signed the Non-Utility Generator Contract (the "NUG Contract") with
the  Ontario  Independent  Electricity  System  Operator  (the  “IESO”)  for  its  Mississauga  cogeneration  facility.  The  NUG
K. Mississauga Cogeneration Facility NUG Contract
Contract was effective on Jan. 1, 2017, and, in conjunction with the execution of the NUG Contract, the Corporation agreed
to terminate, effective  Dec. 31, 2016, the facility’s existing contract with the Ontario Electricity Financial Corporation,
which would have otherwise terminated December 2018.

The NUG Contract provides the Corporation with fixed monthly payments until Dec. 31, 2018, with no delivery obligations,
and maintains the Corporation’s operational flexibility to pursue opportunities for the facility to meet power market needs
in northeastern Ontario. Further details on the NUG Contract and its impact to these financial statements can be found in
Note 8(B).

The Corporation acquired its interest in Wintering Hills in 2015 in connection with the restructuring of the arrangements
associated with its Poplar Creek cogeneration facility. At Dec. 31, 2016, the criteria for Wintering Hills to be classified as
L. Wintering Hills Assets Held for Sale
held for sale were met. The assets held for sale are measured at the lower of carrying amount and fair value less costs to
sell. Accordingly, the Corporation recorded an impairment charge of $28 million in 2016, included in the Wind and Solar
segment. Wintering Hills was sold on March 1, 2017, for proceeds of $61 million.

F30 TRANSALTA CORPORATION

F30

TransAlta Corporation    |    2017  Annual Integrated Report 
 
 
 
Notes to Consolidated Financial Statements

On June 3, 2016, TransAlta Renewables' indirect wholly owned subsidiary, New Richmond Wind L.P. (the “NRWLP”), closed
a bond offering of approximately $159 million, which is secured by a first ranking charge over all assets of the NRWLP. The
M. Project Financing of a Quebec Wind Asset by TransAlta Renewables
bonds are amortizing and bear interest at a rate of 3.963 per cent, payable semi-annually, and mature on June 30, 2032.

N. Investment in, and Acquisition by, TransAlta Renewables of the Sarnia Cogeneration Plant, Le
On Jan. 6, 2016, TransAlta Renewables completed its investment in an economic interest based on the cash flows of the
Corporation’s Canadian Assets for a combined aggregate value of approximately $540 million. The Canadian Assets consist
Nordais Wind Farm, and Ragged Chute Hydro Facility (the “ Canadian Assets” )
of approximately 611 MW of highly contracted power generation assets located in Ontario and Québec. The transaction
was originally announced on Nov. 23, 2015.

As consideration, TransAlta Renewables provided to the Corporation $173 million in cash, issued 15,640,583 common
shares with an aggregate value of $152 million, and issued a $215 million convertible unsecured subordinated debenture.
On Nov. 9, 2017, TransAlta Renewables repaid the debentures early, for $218 million in total, comprised of principal of
$215 million and accrued interest of $3 million. The convertible debenture was scheduled to mature on Dec. 31, 2020.

TransAlta Renewables funded the cash proceeds through the public issuance of 17,692,750 subscription receipts at a price
of $9.75 per subscription receipt. Upon the closing of the transaction, each holder of subscription receipts received, for no
additional consideration, one common share of TransAlta Renewables and a cash dividend equivalent payment of $0.07
for each subscription receipt held. As a result, TransAlta Renewables issued 17,692,750 common shares and paid a total
dividend equivalent of $1 million. Share issuance costs amounted to $8 million, net of $2 million income tax recovery.

On Nov. 30, 2016, TransAlta Renewables acquired direct ownership of the Canadian Assets from the Corporation for a
purchase price of $520 million by issuing a promissory note.  At the same time, the Corporation’s subsidiary redeemed the
preferred shares that it had issued to TransAlta Renewables in January 2016 when TransAlta Renewables acquired an
economic interest in the Canadian Assets as described above for $520 million. The two transactions were subject to a set-
off arrangement and resulted in no cash payments. TransAlta Renewables also acquired working capital and certain capital
spares totalling $19 million through the issuance of a non-interest bearing loan payable to the Corporation.

The  acquisition  of  the  Canadian  Assets  was  accounted  for  by  TransAlta  Renewables  as  a  business  combination  under
common control, requiring the application of the pooling of interests method of accounting, whereby the Canadian Assets’
assets and liabilities acquired were recognized at the book values previously recognized by TransAlta at Nov. 30, 2016, and
not at their fair values. As a result, the Corporation recognized a transfer of equity from the non-controlling interests in
the amount of $38 million in 2016.

TRANSALTA CORPORATION F31

F31

TransAlta Corporation    |    2017  Annual Integrated Report 
 
Notes to Consolidated Financial Statements

On Sept. 1, 2015, the Corporation and Suncor Energy (“Suncor”) restructured their arrangement for power generation
services at Suncor’s oil sands base site near Fort McMurray, Alberta.
O. Restructured Poplar Creek Contract and Acquisition of Wind Farms

The  Corporation’s  Poplar  Creek  cogeneration  facility,  which  has  a  maximum  capacity  of  376  MW,  had  been  built  and
contracted to provide steam and electricity to Suncor until 2023 and is recorded in the gas segment. Under the terms of
the new arrangement, Suncor acquired from TransAlta two steam turbines with an installed capacity of 132 MW and certain
transmission interconnection assets. The Corporation retained two gas turbines and heat recovery steam generators (“gas
generators”), which are leased to Suncor. Suncor assumed full operational control of the cogeneration facility, including
responsibility for all capital costs, and has the right to use the full 244 MW capacity of the Corporation’s gas generators
until Dec. 31, 2030. The Corporation provides Suncor with technical support to maximize performance and reliability of
plant equipment. Ownership of the entire Poplar Creek cogeneration facility will transfer to Suncor in 2030. As the new
contract was determined to constitute a finance lease, the full carrying amounts of the facility were derecognized.

As part of the transaction, the Corporation acquired Suncor’s interest in two wind farms: the 20 MW Kent Breeze facility
located  in  Ontario  and  Suncor’s  51  per  cent  interest  in  the  88  MW  Wintering  Hills  facility  located  in  Alberta.  The
Corporation’s interest in the Wintering Hills facility was accounted for as a joint operation. At Dec. 31, 2016, the Wintering
Hills facility was classified as assets held for sale (see Note 4(L)). The Corporation sold its interest in the Wintering Hills
facility on March 1, 2017.

The following table outlines the impacts of the transaction on closing in 2015, including assets and liabilities disposed of
and the fair value of assets acquired and liabilities assumed:

Assets

Finance lease receivable(1)

Property, plant, and equipment

Intangibles

Net working capital

Total assets acquired

Liabilities

Decomissioning and restoration provision

Net assets acquired

Consideration transferred

Property, plant, and equipment

Net working capital

Decommissioning and restoration provision

Carrying amount of transferred net assets

Gain recognized

372

104

37

2

515

3

512

234

27

(11)

250

262

(1)  Future payments under the finance lease include $57 million annually from 2016 to 2018, and $20 million annually from 2019 to 2030. Payments have been
discounted at a rate of 2.68 per cent, based on comparative yield on borrowings of the counterparty with equivalent maturities at the time of closing.

The acquired wind farms’ contribution to the Corporation’s revenue and operating income from the date of acquisition
until Dec. 31, 2015, was nominal. Had the acquisition taken place at the beginning of 2015, the wind farms would have
contributed $8 million to revenues and reduced earnings before taxes by $2 million.

F32 TRANSALTA CORPORATION

F32

TransAlta Corporation    |    2017  Annual Integrated Report 
 
Notes to Consolidated Financial Statements

On Oct. 1, 2015, the Corporation acquired 100 per cent of the membership interests of Odin Wind Power LLC, owner of
the 50 MW Lakeswind wind facility located in Minnesota, for cash consideration of $49 million and the assumption of
P. US Solar and Wind Acquisition
certain tax equity obligations. The facility is contracted under long-term power purchase agreements until 2034.

On Sept. 1, 2015, the Corporation acquired  100 per cent of the membership interests of RC Solar LLC for cash consideration
of $55 million. The assets acquired include 21 MW of fully contracted solar projects located in Massachusetts, which are
contracted under long-term power purchase agreements ranging from 20 to 30 years, and are qualified under phase one
of the Massachusetts Solar Renewable Energy Credit program.

At the 2015 acquisition dates, the fair values of the identifiable assets and liabilities of Odin Wind Power LLC and RC Solar
LLC were as follows:

Assets

Property, plant, and equipment

Inventory (SREC-I)

Net working capital

Total assets acquired

Liabilities

Non-recourse debt

Tax equity liability
Deferred tax liabilities(1)

Decomissioning and restoration provision

Total liabilities assumed

Total consideration transferred

217

10

6

233

55

50

18

4

127

106

(1) The Corporation has recognized a corresponding deferred tax recovery in the Consolidated Statement of Earnings upon acquisition, representing deductible
temporary differences now expected to be recovered.

The acquired assets’ contribution to the Corporation’s revenue and operating income from the date of acquisition until the
end  of    Dec.  31,  2015,  was  nominal.  Had  the  acquisition  taken  place  at  the  beginning  of  2015,  the  assets  would  have
contributed $14 million to revenues and reduced earnings before taxes by $6 million.

On May 7, 2015, the Corporation closed the acquisition by TransAlta Renewables of an economic interest based on the
cash flows of the Corporation’s Australian Assets. The Corporation’s Australian Assets consisted of 575 MW of power
Q. Sale of Economic Interest in Australian Assets to TransAlta Renewables 
generation from six operating assets and the South Hedland power project then under construction, as well as the  270-
kilometre gas pipeline. TransAlta Renewables’ investment consists of the acquisition of securities that, in aggregate, provide
an economic interest based on cash flows of the Australian assets broadly equal to the underlying net distributable profits.
The combined value of the transaction was $1.78 billion. The Corporation continues to own, manage, and operate the
Australian assets.

With the closing of the transaction, the Corporation received net cash proceeds of $211 million as well as approximately
$1,067 million through a combination of common shares and Class B shares of TransAlta Renewables. The Class B shares
provided voting rights equivalent to the common shares, were non-dividend paying and converted into common shares on
the commissioning of the South Hedland Power Station.

The South Hedland Power Station achieved commercial operation on July 28, 2017. On Aug. 1, 2017, the Corporation
converted  its  26.1  million  Class  B  shares  held  in  TransAlta  Renewables  into  26.4  million  common  shares  of  TransAlta
Renewables. At that time, the Corporation’s equity participation percentage in TransAlta Renewables increased to 64 per
cent  from  59.8  per  cent.  The  Class  B  shares  were  converted  at  a  ratio  greater  than  1:1  because  the  construction  and
commissioning costs for the project were below the referenced costs agreed to by TransAlta Renewables.

TRANSALTA CORPORATION F33

F33

TransAlta Corporation    |    2017  Annual Integrated Report 
 
 
Notes to Consolidated Financial Statements

TransAlta Renewables funded the cash proceeds through the public issuance of 17,858,423 common shares at a price of
$12.65 per share. The offering closed in two parts on April 15 and 23, 2015. TransAlta Renewables  received shareholder
approval  on  May 7,  2015.  TransAlta  Renewables  received  approximately  $226  million  in  gross  proceeds,  and  in  total,
incurred $11 million in share issue costs, net of $3 million of income tax recovery. Proceeds to equity were further reduced
by dividend-equivalent payments of $1 million.

On Nov. 26, 2015, the Corporation completed the sale to Alberta Investment Management Corporation of  20,512,820
common shares of TransAlta Renewables for gross proceeds of $200 million (net proceeds of $193 million). 
R. Sale of TransAlta Renewables Shares to Alberta Investment Management Corporation

On Jan. 14, 2015, the Corporation initiated a significant cost-reduction initiative at its Canadian Coal power generation
operations, resulting in the elimination of positions. On Sept. 29, 2015, the Corporation further reduced its overhead costs
S. Restructuring Provision
by eliminating positions primarily at its corporate head office in Calgary.

On Dec. 15, 2015, the Corporation partially redeemed its net investment in a wholly owned subsidiary. As a result, the
Corporation reclassified from OCI pro rata cumulative translation gains of $10 million, offset by related pro rata cumulative
T. Changes in Internal Capitalization of US Entities
after-tax losses of $6 million from the net investment hedge.

F34 TRANSALTA CORPORATION

F34

TransAlta Corporation    |    2017  Annual Integrated Report 
 
 
Notes to Consolidated Financial Statements

Expenses classified by nature are as follows:
5. Expenses by Nature

Year ended Dec. 31

2017

2016

2015

Fuel and
purchased
power

Operations,
maintenance,
and
administration

Fuel and
purchased
power

Operations,
maintenance,
and
administration

Fuel and
purchased
power

Operations,
maintenance,
and
administration

Fuel

Coal inventory writedown (recovery)

Purchased power

Mine depreciation

Salaries and benefits

Other operating expenses

Total

775

—

162

73

6

—

1,016

—

—

—

—

248

269

517

755

(4)

143

63

6

—

963

—

—

—

—

249

240

489

775

22

147

59

5

—

1,008

—

—

—

—

250

242

492

As part of the Corporation’s monitoring controls, long-range forecasts are prepared for each CGU. The long-range forecast
6. Asset Impairment Charges and Reversals
estimates are used to assess the significance of potential indicators of impairment and provide criteria to evaluate adverse
changes in operations. The Corporation also considers the relationship between its market capitalization and its book value,
among  other  factors,  when  reviewing  for  indicators  of  impairment.  When  indicators  of  impairment  are  present,  the
Corporation estimates a recoverable amount for each CGU by calculating an approximate fair value less costs of disposal
using discounted cash flow projections based on the Corporation’s long-range forecasts. The valuations used are subject
to measurement uncertainty based on assumptions and inputs to the Corporation’s long-range forecast, including changes
to fuel costs, operating costs, capital expenditures, external power prices and useful lives of the assets extending to the
last planned asset retirement in 2073.

During 2017, 2016, and 2015, uncertainty continued to exist within the province of Alberta regarding the Government's
Climate Leadership Plan ("CLP"), the future design parameters of the Alberta electricity market, and federal policies on
A. Alberta Merchant CGU
the carbon levy and greenhouse gas ("GHG") emissions. Economic conditions also contributed to continued oversupply
conditions and depressed market prices throughout 2015 to 2017. The Corporation assessed whether these factors, and
events arising during the latter part of 2016, which are more fully discussed below, presented an indicator of impairment
for  its  Alberta  Merchant  CGU.  In  consideration  of  the  composition  of  this  CGU,  the  Corporation  determined  that  no
indicators  of  impairment  were  present  with  respect  to  the  Alberta  Merchant  CGU.  Due  to  this  determination,  the
Corporation did not perform an in-depth impairment analysis for any of these years, but for all years, a sensitivity analysis
associated  with  these  factors  was  performed  to  confirm  the  continued  existence  of  adequate  excess  of  estimated
recoverable amount over book value. This analysis of the Alberta Merchant CGU continued to demonstrate a substantial
cushion at the Alberta Merchant CGU in each of 2017, 2016, and 2015, due to the Corporation’s large merchant renewable
fleet in the province.

TRANSALTA CORPORATION F35

F35

TransAlta Corporation    |    2017  Annual Integrated Report 
Notes to Consolidated Financial Statements

I. 2017 
Sundance Unit 1
In the second quarter of 2017, the Corporation recognized an impairment charge on Sundance Unit 1 in the amount of $20
million,  due  to  the  Corporation’s  decision  to  early  retire  Sundance  Unit  1.  Previously,  the  Corporation  had  expected
Sundance Unit 1 to operate in the merchant market in 2018 and 2019 and therefore remain within the Alberta Merchant
CGU where significant cushion exists. The impairment assessment was based on value in use and included the estimated
future cash flows expected to be derived from the Unit until its retirement on Jan. 1, 2018. Discounting did not have a
material impact.

No  separate  stand-alone  impairment  test  was  required  for  Sundance  Unit  2,  as  mothballing  the  Unit  maintains  the
Corporation’s flexibility to operate the Unit as part of the Corporation’s Alberta Merchant CGU to 2021. 

II. 2016 
On Nov. 24, 2016, the Corporation reached an Off-Coal Agreement with the Government to receive annual cash payments
of approximately $37.4 million, net to the Corporation (see Note 4(H) for further details) in return for ceasing coal-fired
generation by the end of 2030, among other conditions. Furthermore, the Corporation entered into an MOU on Nov. 24,
2016, with the purpose of collaborating and co-operating to advance objectives of the Alberta CLP. Specifically, the parties
undertook to collaborate on, among other things:

▪

▪

▪

a move toward a capacity market, commencing in 2021, compared to the current energy-only market. Under a capacity
market, generators are compensated for their available capacity;
development of a policy and to facilitate the economic conversion of some coal-fired generation to natural-gas-fired
generation in Alberta, including securing regulatory co-operation from the federal government; and
policy development to address the value of carbon reductions in the generation of electricity from existing wind and
hydro production, the development of effective supporting mechanisms to ensure that existing renewable generation
is not adversely impacted by the implementation of a capacity market in Alberta, and the development of regulatory
clarity and alignment so as to permit the economic and timely development of hydroelectric projects within Alberta.

The MOU does not create any legally binding obligations between the Government and the Corporation and does not
impose any obligations on, or constrain the discretion and authority of, the Government. The announcement of the intention
to move to a capacity market is expected to impact the Alberta market mechanisms. The introduction of a capacity market
to replace Alberta’s current market structure could impact the Corporation’s determination of the Alberta Merchant CGU;
however, there is not currently sufficient information from the Government or the Alberta Electric System Operator, which
is  overseeing  the  development  of  the  capacity  market,  to  determine  if  a  change  is  required.  The  Corporation  has  not
modified its previous conclusions on the determination of the Alberta Merchant CGU.

Wintering Hills
On Jan. 26, 2017, the Corporation announced the sale of its 51 per cent interest in the Wintering Hills merchant wind
facility for approximately $61 million (see Note 4(E)). In connection with this sale, the Wintering Hills assets were accounted
for as held for sale at Dec. 31, 2016. As required, the Corporation assessed the assets for impairment prior to classifying
them as held for sale.  Accordingly, the Corporation has recorded an impairment charge of $28 million using the purchase
price in the sale agreement as the indicator of fair value less cost of disposal in 2016.

III. 2015
In 2015, the Government announced its CLP, which broadly called for the phase-out of coal-generated electricity by 2030,
and  proposed  the  imposition  of  additional  compliance  obligations  for  GHG  emissions  in  the  province.  In  2016,  the
Government refined its approach to GHG by announcing the adoption of a levy on carbon emissions in excess of defined
limits, amounting to $20 per tonne in 2017 and $30 per tonne in 2018. At the federal level, the Canadian government
announced its intention to implement a national price on GHG emissions. Under this proposal, beginning in 2018, there
would be a price of $10 per tonne of carbon dioxide equivalent emitted, rising to $50 per tonne by 2022.

F36 TRANSALTA CORPORATION

F36

TransAlta Corporation    |    2017  Annual Integrated Report 
 
 
Notes to Consolidated Financial Statements

The Corporation considered possible indicators of impairment at US Coal in 2017, 2016, and 2015, as discussed in more
detail below. 
B. US Coal

Fair  value  less  costs  of  disposal  of  the  CGU  was  estimated  to  approximate  its  carrying  amount,  and  accordingly,  no
impairment charge was recorded in 2017, 2016 or 2015. Any adverse change in assumptions, in isolation, would have
resulted in an impairment charge being recorded. The Corporation continues to manage risks associated with the CGU by
optimizing of its operating activities and capital plan.

The valuations are subject to measurement uncertainty based on the key assumptions outlined below, and on inputs to the
Corporation’s  long-range  forecast,  including  changes  to  fuel  costs,  operating  costs,  capital  expenses,  and  the  level  of
contractedness under the Memorandum of Agreement for coal transition established with the State of Washington. The
valuation period extended to the assumed decommissioning of the plant, after its projected cessation of operation in its
current form in 2025.

I. 2017 
During 2017, the Corporation renegotiated rail transportation and coal supply agreements. Accordingly, the Corporation
completed an estimate of the impact for the coal cost changes combined with updated power prices to determine whether
the US Coal CGU had an indicator of impairment. The Corporation concluded that there is no indicator of impairment. The
Corporation utilized the Corporation's long-range forecast and the following key assumptions:

Mid-Columbia annual average power prices

US$21.50 to US$34.81 per MWh

On-highway diesel fuel on coal shipments

US$2.08 to US$2.29 per gallon

Discount rates

7.9 to 9.0 per cent

II. 2016 
During 2016, the Corporation considered possible impairment at the US Coal CGU and found that the fair value less costs
to sell approximated the then current carrying amount. The Corporation estimated the fair value less costs of disposal of
the  CGU,  a  Level  III  fair  value  measurement,  utilizing  the  Corporation’s  long-range  forecast  and  the  following  key
assumptions:

Mid-Columbia annual average power prices

US$22.00 to US$46.00 per MWh

On-highway diesel fuel on coal shipments

US$1.69 to US$2.09 per gallon

Discount rates

5.4 to 5.7 per cent

III. 2015
During 2015, the Corporation considered possible impairment at the US Coal CGU and found that the fair value less costs
to sell approximated the then current carrying amount. The Corporation estimated the fair value less costs of disposal of
the  CGU,  a  Level  III  fair  value  measurement,  utilizing  the  Corporation’s  long-range  forecast  and  the  following  key
assumptions:

Mid-Columbia annual average power prices

US$24.00 to US$50.00 per MWh

On-highway diesel fuel on coal shipments

US$2.44 to US$2.90 per gallon

Discount rates

5.2 to 6.2 per cent

Impairment reversals of $2 million resulted from additional recoveries from the disposal of the Centralia gas plant in
2014.

TRANSALTA CORPORATION F37

F37

TransAlta Corporation    |    2017  Annual Integrated Report 
Notes to Consolidated Financial Statements

7. Finance Lease Receivables
On Aug. 1, 2017, the Corporation received notice of FMG’s intention to repurchase the Solomon Power Station from TEC
Pipe, a wholly owned subsidiary of the Corporation, for approximately US$335 million. FMG completed its acquisition of
A. Re-acquisition of Solomon Power Station
the Solomon Power Station on Nov. 1, 2017 and TEC Pipe received US$325 million as consideration. FMG has held back
the balance from the purchase price. It is the Corporation’s view that this should not be held back and the Corporation is
taking action to recover all, or a significant portion of, this amount from FMG.

Amounts receivable under the Corporation’s finance leases, associated with the Fort Saskatchewan cogeneration facility
and the Poplar Creek cogeneration facility, and in 2016 the Solomon Power Station, are as follows:
B. Amounts Receivable

As at Dec. 31

Within one year

Second to fifth years inclusive

More than five years

Less: unearned finance lease income

Add: unguaranteed residual value

Total finance lease receivables

Included in the Consolidated Statements of Financial Position as:

Current portion of finance lease receivables (Note 12)

Long-term portion of finance lease receivables

2017

2016

Minimum
lease
payments

Present
value of
minimum
lease
payments

Minimum
lease
payments

Present
value of
minimum
lease
payments

119

291

311

721

—

57

778

68

110

140

318

44

—

274

59

215

274

66

82

126

274

—

—

274

124

376

637

1,137

592

233

778

59

719

778

F38 TRANSALTA CORPORATION

F38

TransAlta Corporation    |    2017  Annual Integrated ReportNotes to Consolidated Financial Statements

Net other operating (income) losses are comprised of the following:
8. Net Other Operating (Income) Losses

Year ended Dec. 31

Alberta Off-Coal Agreement

Mississauga cogeneration facility NUG Contract

Market Surveillance Administrator Agreement settlement

Insurance recoveries

Net other operating (income) losses

2017

(40)

(9)

—

—

2016

—

(191)

—

(3)

(49)

(194)

2015

—

—

56

(31)

25

On  Nov.  24,  2016,  the  Corporation  announced  that  it  had  entered  into  the  OCA  with  the  Government  on  transition
payments for the cessation of coal-fired emissions from the Keephills 3, Genesee 3 and Sheerness coal-fired plants on or
A. Alberta Off-Coal Agreement
before Dec. 31, 2030. 

Under the terms of the OCA, the Corporation receives annual cash payments on or before July 31 of approximately $40
million ($37 million, net to the Corporation), commencing Jan. 1, 2017, and terminating at the end of 2030.  The Corporation
recognizes the off-coal payments evenly throughout the year. Receipt of the payments is subject to certain terms and
conditions.  The OCA’s main condition is the cessation of all coal-fired emissions on or before Dec. 31, 2030. The affected
plants are not, however, precluded from generating electricity at any time by any method, other than generation resulting
in coal-fired emissions after Dec. 31, 2020.

2016 
On Dec. 22, 2016, the Corporation announced it had signed a NUG Contract with the IESO for its Mississauga cogeneration
B. Mississauga Cogeneration Facility Contract
facility. The contract is effective on Jan. 1, 2017. The Corporation has agreed to terminate the existing contract with the
Ontario Electricity Financial Corporation early, which would have otherwise terminated in December 2018.

As a result of the NUG Contract, the Corporation recognized a pre-tax gain of approximately $191 million. The predominant
components of the gain relate to recognition of a one-time discounted revenue amount of approximately $207 million,
offset by onerous contract expenses and other termination charges totalling approximately $16 million. The Corporation
also recognized $46 million in accelerated depreciation resulting from the change in useful life of the asset. The Corporation
released and recognized in earnings unrealized pre-tax net losses of $14 million from AOCI due to cash flow hedges de-
designated for accounting purposes. The cash flow hedges were in respect of future gas purchases denominated in US
dollars and expected to occur between 2017 and 2018. In the fourth quarter of 2016, the forecasted gas consumption was
no longer expected to occur, which resulted in the cumulative loss on the hedging instrument being released from AOCI
and recognized in earnings. 

2017 
During the fourth quarter of 2017, the Corporation renegotiated the facility's land lease agreement at a lower cost than
previously estimated in 2016, and accordingly, recognized a gain of $9 million. 

On  March 21,  2014,  the  Alberta  Market  Surveillance  Administrator  (the  “MSA”)  filed  an  application  with  the  Alberta
Utilities Commission (the “AUC”) alleging, among other things, that TransAlta manipulated the price of electricity in the
C. Settlement with the Market Surveillance Administrator
Province of Alberta when it took outages at certain of its coal-fired generating units in late 2010 and early 2011. The
Corporation  denied  the  MSA’s  allegations.  An  oral  hearing  took  place  before  the  AUC  in  December 2014.  A  written
argument was filed in February 2015. In May 2015, further submissions were filed on a recent Supreme Court of Canada
decision relevant to expert evidence. On July 27, 2015, the AUC issued a decision finding, among other things, that i) the
Corporation’s actions in relation to four outage events at its coal-fired generating units, spanning 11 days in 2010 and 2011,
restricted or prevented a competitive response from the associated PPA buyers and manipulated market prices away from
a competitive market outcome and ii) the Corporation breached applicable legislation by allowing one of its employees to
trade while in possession of non-public outage records. The AUC also found that the MSA did not prove, on the balance of

TRANSALTA CORPORATION F39

F39

TransAlta Corporation    |    2017  Annual Integrated ReportNotes to Consolidated Financial Statements

probabilities, that the Corporation breached applicable legislation on the basis that its compliance policies, practices, and
oversight thereof, were inadequate and deficient.

This AUC decision marked the end of the first phase of the proceedings. TransAlta filed for leave to appeal the AUC decision
with the Alberta Court of Appeal in August 2015. The second phase of the AUC proceedings was to consider what penalty
the AUC might impose against the Corporation. On Sept. 30, 2015, TransAlta and the MSA reached an agreement to settle
all outstanding proceedings before the AUC. The settlement, which is in the form of a consent order, was approved by the
AUC on Oct. 29, 2015. Under the terms of the consent order, the Corporation paid a total amount of $56 million that
includes approximately $27 million as a repayment of economic benefit, $4 million to cover the MSA’s legal and related
costs, and a $25 million administrative penalty. Of this amount, $31 million was paid in the fourth quarter of 2015, and the
$25 million administrative penalty was paid in November 2016. As a result of the approval, the Corporation discontinued
the appeal of the AUC’s decision.

There were no insurance recoveries in 2017.
D. Insurance Recoveries

During 2016, the Corporation received $3 million in insurance recoveries (2015 - $31 million), of which $2 million (2015
-  $6  million)  related  to  business  interruption  insurance  claims  and  $1  million  related  to  claims  for  replacement  and
refurbishment of equipment for certain wind facilities (2015 - $7 million for Canadian Coal facilities).

In  2015  the  Corporation  received  $18  million  of  insurance  recoveries  related  to  claims  for  the  replacement  and
refurbishment of certain hydro facilities as a result of the flooding in Southern Alberta in 2013. Additionally, in  2015, $12
million of insurance proceeds were received related to claims for repair costs on certain hydro facilities as a result of flooding
in Southern Alberta in 2013 and were accounted for as a reduction to period operations, maintenance, and administration
costs.

The components of net interest expense are as follows: 
9. Net Interest Expense

Year ended Dec. 31

Interest on debt

Interest income

Capitalized interest (Note 16)

Loss on redemption of bonds (Note 4(F))

Interest on finance lease obligations

Credit facility fees, bank charges, and other interest

Keephills 1 outage interest accruals (reversals) (Note 4)

Other

Accretion of provisions (Note 20)

Net interest expense

2017

218

2016

218

2015

218

(7)

(9)

6

3

18

—

(3)

21

247

(2)

(16)

1

3

19

(10)

(4)

20

229

(2)

(9)

—

4

10

9

—

21

251

F40 TRANSALTA CORPORATION

F40

TransAlta Corporation    |    2017  Annual Integrated ReportNotes to Consolidated Financial Statements

10. Income Taxes
I. Rate Reconciliations
A. Consolidated Statements of Earnings

Year ended Dec. 31

Earnings before income taxes

Net earnings attributable to non-controlling interests not subject to tax

Adjusted earnings before income taxes

Statutory Canadian federal and provincial income tax rate (%)

Expected income tax expense (recovery)

Increase (decrease) in income taxes resulting from:

Lower effective foreign tax rates

Deferred income tax expense related to temporary difference on investment in 
  subsidiary

MSA settlement

Reversal of writedown of deferred income tax assets

Statutory and other rate differences

Other

Income tax expense

Effective tax rate (%)

2017

(54)

(35)

(89)

26.8

(24)

(11)

—

—

(15)

110

4

64

72

2016

314

(109)

205

26.7

55

(16)

11

—

(10)

1

(3)

38

19

2015

221

(34)

187

25.9

48

(16)

95

14

(56)

20

—

105

56

TRANSALTA CORPORATION F41

F41

TransAlta Corporation    |    2017  Annual Integrated ReportNotes to Consolidated Financial Statements

II. Components of Income Tax Expense

The components of income tax expense are as follows:

Year ended Dec. 31
Current income tax expense(1)

Adjustments in respect of current income tax of previous years

Adjustments in respect of deferred income tax of previous years

Deferred income tax expense related to the origination and reversal of temporary
differences

Deferred income tax expense related to temporary difference on investment in 
  subsidiary(2)
Deferred income tax expense resulting from changes in tax rates or laws(3)

Deferred income tax recovery arising from the reversal of writedown of deferred income 
  tax assets(4)

Income tax expense

Year ended Dec. 31

Current income tax expense

Deferred income tax expense (recovery)

Income tax expense

2017

79

—

—

(110)

—

110

(15)

64

2016

2015

23

—

(3)

16

11

1

(10)

38

24

(5)

5

22

95

20

(56)

105

2017

2016

2015

79

(15)

64

23

15

38

19

86

105

(1) During  2017, the Corporation recognized current tax expense of $56 million due to the disposition of the Solomon Power Station on Nov. 1, 2017.
(2) In 2016, reorganizations of certain TransAlta subsidiaries were completed in connection with the New Richmond project financing and the disposition of the
Canadian Assets to TransAlta Renewables. The reorganizations resulted in the recognition of deferred tax liabilities of $3 million and $8 million, respectively.  In 2015,
in order to give effect to the sale of an economic interest in the Australian assets to TransAlta Renewables, a reorganization of certain TransAlta subsidiaries was
completed. The reorganization resulted in the recognition of a $95 million deferred tax liability on TransAlta’s investment in a subsidiary. For both 2015 and 2016,
the deferred tax liabilities had not been recognized previously, as prior to the reorganizations, the taxable temporary differences were not expected to reverse in the
foreseeable future.
(3) On Dec. 22, 2017, the US government enacted H.R.1, originally known as the Tax Cuts and Jobs Act, which includes legislation to decrease its federal corporate
income tax rate from 35 per cent to 21 per cent. The Corporation's net deferred tax liability associated with its directly owned US operations is made up of a deferred
tax asset and a deferred tax liability that net to $6 million. The decrease in the US federal corporate income tax rate resulted in a decrease to the deferred tax asset of
$104 million, all of which is recorded as deferred tax expense in the Consolidated Statement of Earnings, offset by a decrease to the deferred tax liability of $110
million, of which $1 million is recorded as deferred tax expense in the Consolidated Statement of Earnings with an offsetting $111 million deferred tax recovery
recorded in the Consolidated Statement of Other Comprehensive Income. 2016 relates to the impact of increase in the New Brunswick corporate income tax rate from
12 per cent to 14 per cent, enacted Feb. 3, 2016. 2015 relates to the impact of an increase in the Alberta corporate income tax rate from 10 per cent to 12 per cent,
enacted June 18, 2015.
(4) During the year ended Dec. 31, 2017, the Corporation reversed a previous writedown of deferred income tax assets of $15 million (2016 - $10 million writedown
reversal, 2015 - $56 million writedown reversal). The deferred income tax assets relate mainly to the tax benefits of losses associated with the Corporation’s directly
owned US operations. The Corporation had written these assets off as it was no longer considered probable that sufficient future taxable income would be available
from the Corporation’s directly owned US operations to utilize the underlying tax losses, due to reduced price growth expectations. Net operating losses expire
between 2021 and 2037. Recognized OCI during the years ended Dec. 31, 2017 and 2016, has given rise to taxable temporary differences, which forms the primary
basis for utilization of some of the tax losses and the reversal of the writedown.

F42 TRANSALTA CORPORATION

F42

TransAlta Corporation    |    2017  Annual Integrated Report 
89

8

—

(4)

(8)

85

2016

768

103

(1,114)

(282)

70

90

69

17

3

(276)

(383)

(659)

Notes to Consolidated Financial Statements

The aggregate current and deferred income tax related to items charged or credited to equity are as follows:
B. Consolidated Statements of Changes in Equity

Year ended Dec. 31

Income tax expense (recovery) related to:

Net impact related to cash flow hedges

Net impact related to net investment hedges

Net actuarial gains (losses)

Share issuance costs

Loss on sale of investment in subsidiary

Income tax expense reported in equity

2017

2016

2015

(108)

(7)

(4)

—

—

(119)

51

16

4

—

—

71

Significant components of the Corporation’s deferred income tax assets (liabilities) are as follows:
C. Consolidated Statements of Financial Position

As at Dec. 31

Net operating loss carryforwards

Future decommissioning and restoration costs

Property, plant, and equipment

Risk management assets and liabilities, net

Employee future benefits and compensation plans

Interest deductible in future periods

Foreign exchange differences on US-denominated debt

Deferred coal revenues

Other deductible temporary differences

Net deferred income tax liability, before writedown of deferred income tax assets

Writedown of deferred income tax assets

Net deferred income tax liability, after writedown of deferred income tax assets

2017

541

117

(1,009)

(160)

74

50

42

16

22

(307)

(218)

(525)

The net deferred income tax liability is presented in the Consolidated Statements of Financial Position as follows:

As at Dec. 31
Deferred income tax assets(1)

Deferred income tax liabilities

Net deferred income tax liability

2017

24

(549)

(525)

2016

53

(712)

(659)

(1) The deferred income tax assets presented on the Consolidated Statements of Financial Position are recoverable based on estimated future earnings and tax
planning strategies. The assumptions used in the estimate of future earnings are based on the Corporation’s long-range forecasts.

As of Dec. 31, 2017, the Corporation had recognized a net liability of $4 million (2016 - $7 million) related to uncertain tax
positions. The decrease was the result of settlements with taxation authorities.
D. Contingencies

TRANSALTA CORPORATION F43

F43

TransAlta Corporation    |    2017  Annual Integrated Report 
 
 
Notes to Consolidated Financial Statements

The Corporation’s subsidiaries and operations that have non-controlling interests are as follows:
11. Non-Controlling Interests

Subsidiary/Operation

TransAlta Cogeneration L.P.

TransAlta Renewables
Kent Hills Wind LP(1)

(1) Owned by TransAlta Renewables.

Non-controlling interest as at Dec 31, 2017

49.99% - Canadian Power Holdings Inc.

36% - Public shareholders

17% - Natural Forces Technologies Inc.

TransAlta Cogeneration, L.P. (“TA Cogen”) operates a portfolio of cogeneration facilities in Canada and owns 50 per cent
of a coal facility. TransAlta Renewables owns and operates a portfolio of renewable power generation facilities in Canada
and owns economic interests in various other gas and renewable facilities of the Corporation.

Summarized financial information relating to subsidiaries with significant non-controlling interests is as follows:

The net earnings, distributions and equity attributable to non-controlling interests include the 17 per cent non-controlling
A. TransAlta Renewables
interest in the 150 MW Kent Hills wind farm located in New Brunswick.

The South Hedland Power Station achieved commercial operation on July 28, 2017. On Aug. 1, 2017, the Corporation
converted  its  26.1  million  Class  B  shares  held  in  TransAlta  Renewables  into  26.4  million  common  shares  of  TransAlta
Renewables. At that time, the Corporation’s equity participation percentage in TransAlta Renewables increased to 64 per
cent  from  59.8  per  cent.  The  Class  B  shares  were  converted  at  a  ratio  greater  than  1:1  because  the  construction  and
commissioning costs for the project were below the referenced costs agreed to with TransAlta Renewables.

As a result of the conversion of Class B shares and the transactions described in Note 4, the Corporation’s share of
ownership and equity participation in TransAlta Renewables has fluctuated since its formation as follows:

Period

April 29, 2014 to May 6, 2015

May 7, 2015 to Nov. 25, 2015

Nov. 26, 2015 to Jan. 5, 2016

Jan. 6, 2016 to July 31, 2017

Aug. 1, 2017 and thereafter

Year ended Dec. 31

Revenues

Net earnings

Total comprehensive income

Amounts attributable to the non-controlling interests:

Net earnings

Total comprehensive income

Distributions paid to non-controlling interests

Ownership and voting
rights percentage

Equity participation
percentage

70.3

76.1

66.6

64.0

64.0

70.3

72.8

62.0

59.8

64.0

2015

236

198

204

63

65

43

2017

459

13

(24)

11

—

85

2016

259

1

40

2

18

83

F44 TRANSALTA CORPORATION

F44

TransAlta Corporation    |    2017  Annual Integrated Report 
 
As at Dec. 31

Current assets

Long-term assets

Current liabilities

Long-term liabilities

Total equity

Equity attributable to non-controlling interests

Non-controlling interests’ share (per cent)

Year ended Dec. 31
B. TA Cogen
Results of operations

Revenues

Net earnings

Total comprehensive income

Amounts attributable to the non-controlling interest:

Net earnings

Total comprehensive income

Distributions paid to Canadian Power Holdings Inc.

As at Dec. 31

Current assets

Long-term assets

Current liabilities

Long-term liabilities

Total equity

Equity attributable to Canadian Power Holdings Inc.

Non-controlling interest share (per cent)

12. Trade and Other Receivables
As at Dec. 31
Trade accounts receivable

Mississauga recontracting receivable

Net trade receivables

Collateral paid (Note 14)

Current portion of finance lease receivables (Note 7)

Current portion of loan receivable (Note 19)

Income taxes receivables

Trade and other receivables

Notes to Consolidated Financial Statements

2017

145

3,483

(356)

(1,075)

(2,197)

(812)

36.0

2016

109

3,732

(537)

(1,237)

(2,067)

(851)

40.2

2017

2016

2015

175

61

61

31

31

87

274

211

258

105

128

68

288

61

77

31

38

56

2017

2016

193

404

(73)

(26)

(498)

(247)

171

538

(65)

(35)

(609)

(301)

49.99

49.99

2017

2016

693

108

801

67

59

5

1

933

446

112

558

77

59

—

9

703

TRANSALTA CORPORATION F45

F45

TransAlta Corporation    |    2017  Annual Integrated ReportNotes to Consolidated Financial Statements

13. Financial Instruments
Financial assets and financial liabilities are measured on an ongoing basis at cost, fair value, or amortized cost (see Note 2
(C)). The following table outlines the carrying amounts and classifications of the financial assets and liabilities:
A. Financial Assets and Liabilities –  Classification and Measurement

Derivatives
used for
hedging

Derivatives
classified as
held for
trading

Loans and
receivables

Other
financial
liabilities

—

—

—

—

82

638

—

—

—

—

8

2

—

—

—

—

137

46

—

—

—

93

38

—

314

30

933

215

—

—

33

—

—

—

—

—

Total

314

30

933

215

219

684

33

595

34

101

40

—

—

—

—

—

—

—

595

34

—

—

3,707

3,707

Carrying value as at Dec. 31, 2017

Financial assets
Cash and cash equivalents(1)

Restricted cash

Trade and other receivables

Long-term portion of finance lease receivables

Risk management assets

Current

Long-term

Other assets

Financial liabilities

Accounts payable and accrued liabilities

Dividends payable

Risk management liabilities

Current

Long-term

Credit facilities, long-term debt and finance lease 
  obligations(2)

(1) Includes cash equivalents of nil.
(2) Includes current portion.

F46 TRANSALTA CORPORATION

F46

TransAlta Corporation    |    2017  Annual Integrated Report 
 
Carrying value as at Dec. 31, 2016

Financial assets

Cash and cash equivalents(1)

Trade and other receivables

Long-term portion of finance lease receivables

Other assets

Risk management assets

Current

Long-term

Financial liabilities

Accounts payable and accrued liabilities

Dividends payable

Risk management liabilities

Current

Long-term

Credit facilities, long-term debt and finance lease 
  obligations(2)

(1) Includes cash equivalents of $103 million.
(2) Includes current portion.

Notes to Consolidated Financial Statements

Derivatives
used for
hedging

Derivatives
classified as
held for
trading

Loans and
receivables

Other
financial
liabilities

—

—

—

—

192

749

—

—

1

4

—

—

—

—

—

57

36

—

—

65

44

—

305

703

719

116

—

—

—

—

—

—

—

Total

305

703

719

116

249

785

413

54

66

48

—

—

—

—

—

—

413

54

—

—

4,361

4,361

The fair value of a financial instrument is the price that would be received to sell an asset or paid to transfer a liability in an
orderly transaction between market participants at the measurement date. Fair values can be determined by reference to
B. Fair Value of Financial Instruments
prices for that instrument in active markets to which the Corporation has access. In the absence of an active market, the
Corporation determines fair values based on valuation models or by reference to other similar products in active markets.

Fair values determined using valuation models require the use of assumptions. In determining those assumptions, the
Corporation looks primarily to external readily observable market inputs. However, if not available, the Corporation uses
inputs that are not based on observable market data. 

I. Level I, II, and III Fair Value Measurements
The Level I, II, and III classifications in the fair value hierarchy utilized by the Corporation are defined below. The fair value
measurement of a financial instrument is included in only one of the three levels, the determination of which is based on
the lowest level input that is significant to the derivation of the fair value.

a. Level I
Fair values are determined using inputs that are quoted prices (unadjusted) in active markets for identical assets or liabilities
that the Corporation has the ability to access at the measurement date. In determining Level I fair values, the Corporation
uses quoted prices for identically traded commodities obtained from active exchanges such as the New York Mercantile
Exchange.

TRANSALTA CORPORATION F47

F47

TransAlta Corporation    |    2017  Annual Integrated Report 
 
 
 
Notes to Consolidated Financial Statements

b. Level II
Fair values are determined, directly or indirectly, using inputs that are observable for the asset or liability.

Fair values falling within the Level II category are determined through the use of quoted prices in active markets, which in
some cases are adjusted for factors specific to the asset or liability, such as basis, credit valuation, and location differentials.

The Corporation’s commodity risk management Level II financial instruments include over-the-counter derivatives with
values based on observable commodity futures curves and derivatives with inputs validated by broker quotes or other
publicly available market data providers. Level II fair values are also determined using valuation techniques, such as option
pricing models and regression or extrapolation formulas, where the inputs are readily observable, including commodity
prices for similar assets or liabilities in active markets, and implied volatilities for options.

In determining Level II fair values of other risk management assets and liabilities and long-term debt measured and carried
at fair value, the Corporation uses observable inputs other than unadjusted quoted prices that are observable for the asset
or liability, such as interest rate yield curves and currency rates. For certain financial instruments where insufficient trading
volume or lack of recent trades exists, the Corporation relies on similar interest or currency rate inputs and other third-
party information such as credit spreads.

c. Level III
Fair values are determined using inputs for the assets or liabilities that are not readily observable. 

The Corporation may enter into commodity transactions for which market-observable data is not available. In these cases,
Level III fair values are determined using valuation techniques such as the Black-Scholes, mark-to-forecast, and historical
bootstrap models with inputs that are based on historical data such as unit availability, transmission congestion, demand
profiles for individual non-standard deals and structured products, and/or volatilities and correlations between products
derived from historical prices.

The Corporation also has various commodity contracts with terms that extend beyond a liquid trading period. As forward
market prices are not available for the full period of these contracts, the value of these contracts is derived by reference
to a forecast that is based on a combination of external and internal fundamental modelling, including discounting. As a
result, these contracts are classified in Level III.

The  Corporation  has  a  Commodity  Exposure  Management  Policy,  which  governs  both  the  commodity  transactions
undertaken  in  its  proprietary  trading  business  and  those  undertaken  to  manage  commodity  price  exposures  in  its
generation  business.  This  Policy  defines  and  specifies  the  controls  and  management  responsibilities  associated  with
commodity trading activities, as well as the nature and frequency of required reporting of such activities. 

Methodologies and procedures regarding commodity risk management Level III fair value measurements are determined
by the Corporation’s risk management department. Level III fair values are calculated within the Corporation’s energy
trading risk management system based on underlying contractual data as well as observable and non-observable inputs.
Development of non-observable inputs requires the use of judgment. To ensure reasonability, system-generated Level III
fair value measurements are reviewed and validated by the risk management and finance departments. Review occurs
formally on a quarterly basis or more frequently if daily review and monitoring procedures identify unexpected changes
to fair value or changes to key parameters.

Information  on  risk  management  contracts  or  groups  of  risk  management  contracts  that  are  included  in  Level  III
measurements and the related unobservable inputs and sensitivities, is as follows, and excludes the effects on fair value
of certain unobservable inputs such as liquidity and credit discount (described as “base fair values”), as well as inception
gains or losses. 

Sensitivity ranges for the base fair values are determined using reasonably possible alternative assumptions for the key
unobservable  inputs,  which  may  include  forward  commodity  prices,  commodity  volatilities  and  correlations,  delivery
volumes, and shapes.

F48 TRANSALTA CORPORATION

F48

TransAlta Corporation    |    2017  Annual Integrated Report 
 
As at Dec. 31

Description

Long-term power sale - US

Long-term power sale - Alberta

Unit contingent power purchases

Structured products - Eastern US

Others

Notes to Consolidated Financial Statements

2017

2016

Base fair value Sensitivity Base fair value

Sensitivity

853

(1)

44

17

5

+130
-130

+2
-2

+7
-9

+8
-7

+9
-9

907

(3)

13

24

6

+76
-69

+5
-5

+2
-4

+8
-8

+3
-3

i. Long-Term Power Sale - US
The Corporation has a long-term fixed price power sale contract in the US for delivery of power at the following capacity
levels: 380 MW through Dec. 31, 2024, and 300 MW through Dec. 31, 2025. The contract is designated as an all-in-one
cash flow hedge.

For periods beyond 2019, market forward power prices are not readily observable. For these periods, fundamental-based
forecasts and market indications have been used to determine proxies for base, high, and low power price scenarios. The
base price forecast has been developed by averaging external fundamental-based forecasts (providers are independent
and widely accepted as industry experts for scenario and planning views). Forward power price ranges per MWh used in
determining the Level III base fair value at Dec. 31, 2017 are US$25 - US$34 (Dec. 31, 2016 - US$27 - US$36). The sensitivity
analysis  has  been  prepared  using  the  Corporation’s  assessment  that  a  US$6  (Dec.  31,  2016  -  US$5)  price  increase  or
decrease in the forward power prices is a reasonably possible change.

The contract is denominated in US dollars. With the weakening of the US dollar relative to the Canadian dollar from Dec.
31, 2016 to Dec. 31, 2017, the base fair value and the sensitivity values have decreased by approximately $50 million and
$8 million, respectively. 

ii. Long-Term Power Sale - Alberta
The Corporation has a long-term 12.5 MW fixed price power sale contract (monthly shaped) in the Alberta market through
December 2024. The contract is accounted for as held for trading.

For periods beyond 2022, market forward power prices are not readily observable. For these periods, fundamental-based
price forecasts and market indications have been used as proxies to determine base, high, and low power price scenarios.
The base scenario uses the most recent price view from an independent external forecasting service that is accepted within
industry as an expert in the Alberta market. Forward power price ranges per MWh used in determining the Level III base
fair value at Dec. 31, 2017, are $63 - $67 (Dec. 31, 2016 - $68 - $93). The sensitivity analysis has been prepared using the
Corporation’s assessment that a 20 per cent increase or decrease in the forward power prices is a reasonably possible
change. 

iii. Unit Contingent Power Purchases
Under the unit contingent power purchase agreements, the Corporation has agreed to purchase power contingent upon
the actual generation of specific units owned and operated by third parties. Under these types of agreements, the purchaser
pays the supplier an agreed upon fixed price per MWh of output multiplied by the pro rata share of actual unit production
(nil if a plant outage occurs). The contracts are accounted for as held for trading.

The key unobservable inputs used in the valuations are delivered volume expectations and hourly shapes of production.
Hourly shaping of the production will result in realized prices that may be at a discount (or premium) relative to the average
settled  power  price.  Reasonably  possible  alternative  inputs  were  used  to  determine  sensitivity  on  the  fair  value
measurements.

TRANSALTA CORPORATION F49

F49

TransAlta Corporation    |    2017  Annual Integrated Report 
 
 
Notes to Consolidated Financial Statements

This  analysis  is  based  on  historical  production  data  of  the  generation  units  for  available  history.  Price  and  volumetric
discount ranges per MWh used in the Level III base fair value measurement at Dec. 31, 2017, are nil (Dec. 31, 2016 - nil)
and 2.20 per cent to 2.76 per cent (Dec. 31, 2016 – 2.15 per cent to 3.62 per cent), respectively.  The sensitivity analysis
has  been  prepared  using  the  Corporation’s  assessment  of  a  reasonably  possible  change  in  price  discount  ranges  of
approximately 1.1 per cent to 1.94 per cent (Dec. 31, 2016 - 0.75 per cent) and a change in volumetric discount rates of
approximately 7.77 per cent to 10.46 per cent (Dec. 31, 2016 - 15.5 per cent), which approximate one standard deviation
for each input.

iv. Structured Products - Eastern US
The Corporation has fixed priced power and heat rate contracts in the eastern United States. Under the fixed priced power
contracts, the Corporation has agreed to buy or sell power at non-liquid locations, or during non-standard hours. The
Corporation has also bought and sold heat rate contracts at both liquid and non-liquid locations. Under a heat rate contract,
the buyer has the right to purchase power at times when the market heat rate is higher than the contractual heat rate. 

The key unobservable inputs in the valuation of the fixed priced power contracts are market forward spreads and non-
standard shape factors. A historical regression analysis has been performed to model the spreads between non-liquid and
liquid hubs. The non-standard shape factors have been determined using the historical data. Basis relationship and non-
standard shape factors used in the Level III base fair value measurement at Dec. 31, 2017, are 75 per cent to 159 per cent
and 71 per cent to 88 per cent (Dec. 31, 2016 – 66 per cent to 128 per cent and 65 per cent to 88 per cent), respectively.
The sensitivity analysis has been prepared using the Corporation’s assessment of a reasonably possible change in market
forward spreads of approximately 7 per cent (Dec. 31, 2016 - 5 per cent) and a change in non-standard shape factors of
approximately 6 per cent (Dec. 31, 2016 - 9 per cent), which approximate one standard deviation for each input.

The key unobservable inputs in the valuation of the heat rate contracts are implied volatilities and correlations. Implied
volatilities and correlations used in the Level III base fair value measurement at Dec. 31, 2017, are 18 per cent to 54 per
cent and 70 per cent (Dec. 31, 2016 – 20 per cent to 54 per cent and 70 per cent), respectively. The sensitivity analysis has
been  prepared  using  the  Corporation’s  assessment  of  a  reasonably  possible  change  in  implied  volatilities  ranges  and
correlations of approximately 27 per cent to 32 per cent and 10 per cent, respectively (2016 - 10 per cent). 

II. Commodity Risk Management Assets and Liabilities
Commodity risk management assets and liabilities include risk management assets and liabilities that are used in the energy
marketing  and  generation  businesses  in  relation  to  trading  activities  and  certain  contracting  activities.  To  the  extent
applicable, changes in net risk management assets and liabilities for non-hedge positions are reflected within earnings of
these businesses.

Commodity risk management assets and liabilities classified by fair value levels as at Dec. 31, 2017, are as follows: Level I
- $1 million net liability (Dec. 31, 2016 - nil), Level II - $42 million net liability (Dec. 31, 2016 - $14 million net liability), Level
III - $771 million net asset (Dec. 31, 2016 - $758 million net asset). 

Significant changes in commodity net risk management assets (liabilities) during the year ended Dec. 31, 2017 are primarily
attributable to the changes in value of the long-term power sale contract (Level III hedge) as discussed in the preceding
section (B)(I)(c)(i) of this note.

F50 TRANSALTA CORPORATION

F50

TransAlta Corporation    |    2017  Annual Integrated Report 
 
Notes to Consolidated Financial Statements

The following tables summarize the key factors impacting the fair value of the Level III commodity risk management assets
and liabilities by classification level during the years ended Dec. 31, 2017 and 2016, respectively:

 Opening balance

 Changes attributable to:

   Market price changes on existing contracts

   Market price changes on new contracts

   Contracts settled

   Change in foreign exchange rates

  Transfers into Level III

 Net risk management assets at end of period

 Additional Level III information:

   Gains recognized in other comprehensive income

  Total gains included in earnings before income taxes

  Unrealized gains (losses) included in earnings before 
    income taxes relating to net assets held at period end 

Year ended Dec. 31, 2017

Year ended Dec. 31, 2016

Hedge Non-hedge Total

Hedge Non-hedge Total

726

100

—

(57)

(50)

—

719

50

57

—

32

758

640

(98)

542

(2)

33

(10)

(2)

1

52

—

29

19

98

33

(67)

(52)

1

771

50

86

19

163

—

(50)

(27)

—

726

136

50

—

13

29

88

—

—

176

29

38

(27)

—

32

758

— 136

42

92

130

130

III. Other Risk Management Assets and Liabilities
Other  risk  management  assets  and  liabilities  primarily  include  risk  management  assets  and  liabilities  that  are  used  in
managing exposures on non-energy marketing transactions such as interest rates, the net investment in foreign operations,
and other foreign currency risks. Hedge accounting is not always applied. 

Other risk management assets and liabilities with a total net asset fair value of $34 million as at Dec. 31, 2017 (Dec. 31,
2016 - $176 million net asset) are classified as Level II fair value measurements. The significant changes in other net risk
management assets during the year ended Dec. 31, 2017, are primarily attributable to the settlement of contracts.

IV. Other Financial Assets and Liabilities
The fair value of financial assets and liabilities measured at other than fair value is as follows:

Long-term debt(1) - Dec. 31, 2017

Long-term debt(1) - Dec. 31, 2016

Fair value

Level I

Level II

Level III

—

—

3,708

4,271

—

—

Total

3,708

4,271

Total
carrying

value

3,638

4,221

(1) Includes current portion. 2016 excludes $67 million of debt measured and carried at fair value.

The  fair  values  of  the  Corporation’s  debentures  and  senior  notes  are  determined  using  prices  observed  in  secondary
markets. Non-recourse and other long-term debt fair values are determined by calculating an implied price based on a
current assessment of the yield to maturity. 

The  carrying  amount  of  other  short-term  financial  assets  and  liabilities  (cash  and  cash  equivalents,  trade  accounts
receivable,  collateral  paid,  accounts  payable  and  accrued  liabilities,  collateral  received,  and  dividends  payable)
approximates fair value due to the liquid nature of the asset or liability. The fair values of the loan receivable (see Note
19) and the finance lease receivables (see Note 7) approximate the carrying amounts.

TRANSALTA CORPORATION F51

F51

TransAlta Corporation    |    2017  Annual Integrated Report 
 
 
Notes to Consolidated Financial Statements

The majority of derivatives traded by the Corporation are based on adjusted quoted prices on an active exchange or extend
beyond the time period for which exchange-based quotes are available. The fair values of these derivatives are determined
C. Inception Gains and Losses
using inputs that are not readily observable. Refer to section B of this note for fair value Level III valuation techniques used.
In  some  instances,  a  difference  may  arise  between  the  fair  value  of  a  financial  instrument  at  initial  recognition  (the
“transaction  price”)  and  the  amount  calculated  through  a  valuation  model.  This  unrealized  gain  or  loss  at  inception  is
recognized in net earnings (loss) only if the fair value of the instrument is evidenced by a quoted market price in an active
market,  observable  current  market  transactions  that  are  substantially  the  same,  or  a  valuation  technique  that  uses
observable market inputs. Where these criteria are not met, the difference is deferred on the Consolidated Statements of
Financial Position in risk management assets or liabilities, and is recognized in net earnings (loss) over the term of the
related contract. The difference between the transaction price and the fair value determined using a valuation model, yet
to be recognized in net earnings, and a reconciliation of changes is as follows:

As at Dec. 31

Unamortized net gain at beginning of year

New inception gains

Change in foreign exchange rates

Amortization recorded in net earnings during the year

Unamortized net gain at end of year

2017

148

12

(7)

(48)

105

2016

202

10

(4)

(60)

148

2015

188

28

28

(42)

202

F52 TRANSALTA CORPORATION

F52

TransAlta Corporation    |    2017  Annual Integrated Report 
14. Risk Management Activities
Aggregate net risk management assets and (liabilities) are as follows: 
A. Net Risk Management Assets and Liabilities

As at Dec. 31, 2017

Commodity risk management

Current

Long-term

Net commodity risk management assets

Other

Current

Long-term

Net other risk management assets (liabilities)

Total net risk management assets (liabilities)

As at Dec. 31, 2016

Commodity risk management

Current

Long-term

Net commodity risk management assets

Other

Current

Long-term

Net other risk management assets (liabilities)

Total net risk management assets (liabilities)

Notes to Consolidated Financial Statements

Cash flow
hedges

Fair value
hedges

Not
designated
as a hedge

74

636

710

—

—

—

710

—

—

—

—

—

—

—

7

11

18

37

(3)

34

52

Cash flow
hedges

Fair value
hedges

Not
designated
as a hedge

86

683

769

105

59

164

933

—

—

—

—

3

3

3

(16)

(9)

(25)

8

1

9

(16)

Total

81

647

728

37

(3)

34

762

Total

70

674

744

113

63

176

920

Additional information on derivative instruments has been presented on a net basis below.

TRANSALTA CORPORATION F53

F53

TransAlta Corporation    |    2017  Annual Integrated Report 
Notes to Consolidated Financial Statements

I. Netting Arrangements

Information  about  the  Corporation’s  financial  assets  and  liabilities  that  are  subject  to  enforceable  master  netting
arrangements or similar agreements is as follows:

As at Dec. 31

2017

2016

Gross amounts recognized

Gross amounts set-off

Net amounts as presented in the 
  Consolidated Statements of 
  Financial Position

Current
financial
assets

Long-term
financial
assets

Current
financial
liabilities

Long-term
financial
liabilities

Current
financial
assets

Long-term
financial
assets

Current
financial
liabilities

Long-term
financial
liabilities

281

(43)

637

—

(159)

43

(38)

—

315

(24)

744

(3)

(113)

24

(53)

3

238

637

(116)

(38)

291

741

(89)

(50)

II. Hedges
a. Net Investment Hedges
The Corporation’s hedges of its net investment in foreign operations in 2017 were comprised of US-dollar-denominated
long-term debt with a face value of US$480 million (2016 - US$630 million). During 2016, the Corporation de-designated
its foreign currency forward contracts from its net investment hedges.  The cumulative unrealized losses on these contracts
will be deferred in AOCI until the disposal of the related foreign operation.

b. Cash Flow Hedges

i. Commodity Risk Management
The Corporation’s outstanding commodity derivative instruments designated as hedging instruments are as follows:

As at Dec. 31

Type
(thousands)

Electricity (MWh)

2017

2016

Notional
amount
sold

1,997

Notional
amount
purchased

Notional
amount
sold

Notional
amount
purchased

44

4,916

—

During 2017, additional unrealized pre-tax gains of $2 million (2016 - nil, 2015 - $3 million) related to certain power hedging
relationships that were previously de-designated and deemed ineffective for accounting purposes were released from
AOCI and recognized in net earnings. The cash flow hedges were in respect of future power production expected to occur
between 2012 and 2017. In the first quarter of 2011, the production was assessed as highly probable not to occur based
on then forecast prices. These unrealized gains were calculated using then current forward prices that changed between
then  and  the  time  the  contracts  settled. Had  these  hedges  not  been  deemed  ineffective  for  accounting  purposes,  the
revenues associated with these contracts would have been recorded in net earnings when settled, the majority of which
occurred during 2012; however, the expected cash flows from these contracts would not change.

As  at  Dec.  31,  2017,  cumulative  gains  of  $1  million  (2016  -  $4  million)  related  to  certain  cash  flow  hedges  that  were
previously de-designated and no longer meet the criteria for hedge accounting continue to be deferred in AOCI and will
be reclassified to net earnings as the forecasted transactions occur or immediately if the forecasted transactions are no
longer expected to occur.

F54 TRANSALTA CORPORATION

F54

TransAlta Corporation    |    2017  Annual Integrated Report 
 
 
 
Notes to Consolidated Financial Statements

ii. Foreign Currency Rate Risk Management 

The Corporation uses foreign exchange forward contracts to hedge a portion of its future foreign-denominated receipts
and expenditures, and both foreign exchange forward contracts and cross-currency swaps to manage foreign exchange
exposure on foreign-denominated debt not designated as a net investment hedge.

During the first quarter of 2017, the Corporation discontinued hedge accounting for certain foreign currency cash flow
hedges on US$690 million of debt. As at March 31, 2017, cumulative gains on the cash flow hedges of approximately $3
million will continue to be deferred in Accumulated Other Comprehensive Income and will be reclassified to net earnings
as the forecasted transactions (interest payments) occur. Changes in these risk management assets and liabilities related
to these discontinued hedge positions will be reflected within net earnings prospectively.

As at Dec. 31

Notional
amount
sold

Notional
amount
purchased

2017

Fair value
asset

Maturity

Notional
amount
sold

Notional
amount
purchased

Fair value
asset

Maturity

2016

Foreign Exchange Forward Contracts - foreign-denominated receipts/expenditures

CAD9

CAD14

AUD1

USD7

EUR9

JPY119

—

—

—

Foreign Exchange Forward Contracts - foreign-denominated debt

—

—

Cross-Currency Swaps - foreign-denominated debt

—

—

—

—

—

—

—

2018

2018

2018

—

—

—

—

—

—

—

AUD8

JPY710

CAD26

USD20

CAD434

CAD306

USD400

USD270

—

—

1

—

104

59

—

—

2017

2018

2017

2018

iii. Effect of Cash Flow Hedges

The following tables summarize the pre-tax amounts recognized in and reclassified out of OCI related to cash flow hedges:

Derivatives in cash
flow hedging
relationships

Commodity contracts

Foreign exchange forwards on
commodity contracts

Foreign exchange forwards on
project hedges

Foreign exchange forwards on
US debt

Cross-currency swaps

Forward starting interest rate
swaps

Year ended Dec. 31, 2017

Effective portion

Ineffective portion

Pre-tax
gain (loss)
recognized in 
OCI

Location of (gain) 
loss
reclassified
from OCI

Pre-
tax (gain) loss
reclassified
from OCI

Location of (gain) loss
reclassified
from OCI

Pre-tax
(gain) loss
recognized in
earnings

163 Revenue

(172) Revenue

Fuel and
purchased power

—

Revenue

Property, plant,
and equipment

Foreign exchange
(gain) loss

(1)

—

Foreign exchange
(gain) loss

(26)

Fuel and purchased
power

Revenue

Foreign exchange
(gain) loss

Foreign exchange
(gain) loss

Foreign exchange
(gain) loss

—

—

—

3

24

—

Interest expense

7

Interest expense

—

—

—

—

—

—

—

—

OCI impact

136 OCI impact

(138) Net earnings impact

Over the next 12 months, the Corporation estimates that approximately $85 million of after-tax gains will be reclassified
from AOCI to net earnings. These estimates assume constant natural gas and power prices, interest rates, and exchange
rates over time; however, the actual amounts that will be reclassified may vary based on changes in these factors.

TRANSALTA CORPORATION F55

F55

TransAlta Corporation    |    2017  Annual Integrated Report 
Derivatives in cash
flow hedging
relationships

Commodity contracts

Foreign exchange forwards on
commodity contracts

Foreign exchange forwards on
project hedges

Foreign exchange forwards on
US debt

Cross-currency swaps

Forward starting interest rate
swaps

Derivatives in cash
flow hedging
relationships

Commodity contracts

Foreign exchange forwards on
commodity contracts

Foreign exchange forwards on
project hedges

Foreign exchange forwards on
U.S. debt

Cross-currency swaps

Forward starting interest rate
swaps

Notes to Consolidated Financial Statements

Year ended Dec. 31, 2016

Effective portion

Ineffective portion

Pre-tax
gain (loss)
recognized in 
OCI

Location of (gain) 
loss
reclassified
from OCI

Pre-
tax (gain) loss
reclassified
from OCI

Location of (gain) loss
reclassified
from OCI

Pre-tax
(gain) loss
recognized in 
earnings

304 Revenue

(169) Revenue

Fuel and
purchased power

Fuel and purchased
power

44

(5) Revenue

Property, plant,
and equipment

Foreign exchange
(gain) loss

(1)

(2)

Foreign exchange
(gain) loss

(25)

(16) Revenue

Foreign exchange
(gain) loss

Foreign exchange
(gain) loss

—

53

Foreign exchange
(gain) loss

(23)

— Interest expense

6

Interest expense

OCI impact

271 OCI impact

(105) Net earnings impact

During December 2016, the Corporation entered into a new contract with the Ontario IESO relating to the Mississauga
cogeneration  facility  that  principally  terminates  the  generation  effective  Jan. 1,  2017.  Accordingly,  the  Corporation
reclassified unrealized pre-tax cash flow commodity hedge losses of $31 million and $15 million of unrealized pre-tax cash
flow foreign exchange hedge gains from AOCI to net earnings due to hedge de-designations for accounting purposes. The
cash flow hedges were in respect of future gas purchases expected to occur between 2017 and 2018. See Note 8(B) for
further details.

Year ended Dec. 31, 2015

Effective portion

Ineffective portion

Pre-tax
gain (loss)
recognized in 
OCI

Location of (gain) 
loss
reclassified
from OCI

Pre-
tax (gain) loss
reclassified
from OCI

Location of (gain) loss
reclassified
from OCI

Pre-tax
(gain) loss
recognized in 
earnings

Revenue

(110) Revenue

Fuel and
purchased power

308

Fuel and purchased
power

41

32 Revenue

(12) Revenue

Property, plant,
and equipment

Foreign exchange
(gain) loss

4

10

Foreign exchange
(gain) loss

163

Foreign exchange
(gain) loss

(1)

Foreign exchange
(gain) loss

(12)

(163)

Foreign exchange
(gain) loss

— Interest expense

7

Interest expense

OCI impact

517 OCI impact

(250) Net earnings impact

During 2015, total unrealized pre-tax gains of $6 million were released from AOCI and recognized in earnings due to hedge
de-designations for accounting purposes.

F56 TRANSALTA CORPORATION

F56

—

31

(15)

—

—

—

—

16

5

—

—

—

—

—

—

5

TransAlta Corporation    |    2017  Annual Integrated ReportNotes to Consolidated Financial Statements

c. Fair Value Hedges
i. Interest Rate Risk Management 
During  the  first  quarter  of  2017,  the  Corporation  discontinued  hedge  accounting  for  certain  fair  value  hedges  on
US$50 million of debt. As at March 31, 2017, cumulative losses of approximately $2 million related to the fair value hedge,
and recognized as part of the carrying value of the hedged debt, will be amortized to net earnings over the period to the
debt's maturity. Changes in these risk management assets and liabilities related to these discontinued hedge positions will
be  reflected  within  net  earnings  prospectively.  See  section  II(b)(ii)  of  this  note  for  information  on  these  non-hedge
derivatives.

During 2016, the Corporation had converted a portion of its fixed interest rate debt with a rate of 6.65 per cent to a floating
interest rate based on the US LIBOR rate using interest rate swaps as outlined below:

As at Dec. 31

Notional
amount

—

2017

Fair
value
asset

—

Maturity

—

Notional
amount

USD50

2016

Fair
value
asset

3

Maturity

2018

Including  interest  rate  swaps  outlined  in  section  II(b)(ii)  of  this  note,  and  the  above  swap  in  2016,  6  per  cent  of  the
Corporation’s debt as at Dec. 31, 2017 is subject to floating interest rates (2016 - 6 per cent).

III. Non-Hedges
The Corporation enters into various derivative transactions as well as other contracting activities that do not qualify for
hedge accounting or where a choice was made not to apply hedge accounting. As a result, the related assets and liabilities
are classified as held for trading. The net realized and unrealized gains or losses from changes in the fair value of these
derivatives are reported in earnings in the period the change occurs.

a. Commodity Risk Management

As at Dec. 31

Type
(thousands)

Electricity (MWh)

Natural gas (GJ)

Transmission (MWh)

Emissions (tonnes)

Heating oil (gallons)

2017

2016

Notional
amount
sold

Notional
amount
purchased

Notional
amount
sold

Notional
amount
purchased

14,688

74,195

1

516

—

7,348

19,362

19,060

103,805

146,113

173,187

3,455

717

—

—

1,370

—

3,429

1,370

294

TRANSALTA CORPORATION F57

F57

TransAlta Corporation    |    2017  Annual Integrated Report 
 
 
Notes to Consolidated Financial Statements

b. Other Non-Hedge Derivatives

i. Foreign Currency

During the first quarter of 2017, the Corporation discontinued hedge accounting for certain foreign currency cash flow
hedges on US$690 million of debt. Changes in these risk management assets and liabilities related to these discontinued
hedge positions will be reflected within net earnings prospectively.

As at Dec. 31

Notional
amount
sold

Notional
amount
purchased

2017

Fair value
asset
(liability)

2016

Maturity

Notional
amount
sold

Notional
amount
purchased

Fair value
asset
(liability)

Maturity

Foreign Exchange Forward Contracts - foreign-denominated receipts/expenditures

AUD170

USD73

CAD157

CAD104

(9) 2018-2021

USD152

CAD216

11

2018-2021

AUD232

CAD219

12

2017-2020

(3) 2017-2020

Foreign Exchange Forward Contracts - foreign-denominated debt

CAD294

USD230

(4)

2018

Cross Currency Swaps - foreign-denominated debt

CAD306

USD270

35

2018

—

—

—

—

—

—

—

—

ii. Interest Rate

The Corporation has converted a portion of its fixed interest rate debt with a rate of 6.65 per cent (2016 - 6.65 per cent)
to a floating interest rate based on the US LIBOR rate using interest rate. The Corporation has converted a portion of its
floating rate debt to a fixed rate of 4.7 per cent.

As at Dec. 31

Fixed rate debt

Floating rate debt

2017

Fair
value
asset

1

—

Notional
amount

USD50

USD22

Maturity

2018

2018-24

Notional
amount

—

—

2016

Fair
value
asset

—

—

Maturity

—

—

c. Total Return Swaps 
The Corporation has certain compensation, deferred, and restricted share unit programs, the values of which depend on
the common share price of the Corporation. The Corporation has fixed a portion of the settlement cost of these programs
by entering into a total return swap for which hedge accounting has not been applied. The total return swap is cash settled
every quarter based upon the difference between the fixed price and the market price of the Corporation’s common shares
at the end of each quarter.

d. Effect of Non-Hedges
For the year ended Dec. 31, 2017, the Corporation recognized a net unrealized gain of $45 million (2016 - loss of $63
million, 2015 - loss of $51 million) related to commodity derivatives.

For the year ended Dec. 31, 2017, a gain of $28 million (2016 - gain of $9 million, 2015 - loss of $1 million) related to foreign
exchange and other derivatives was recognized, which is comprised of net unrealized losses of $2 million (2016 - gains of
$4 million, 2015 - loss of $11 million) and net realized gains of $30 million (2016 - gains of $5 million, 2015 - gains of $10
million).

F58 TRANSALTA CORPORATION

F58

TransAlta Corporation    |    2017  Annual Integrated Report 
 
Notes to Consolidated Financial Statements

B. Nature and Extent of Risks Arising from Financial Instruments
The following discussion is limited to the nature and extent of certain risks arising from financial instruments.

I. Market Risk
a. Commodity Price Risk
The Corporation has exposure to movements in certain commodity prices in both its electricity generation and proprietary
trading businesses, including the market price of electricity and fuels used to produce electricity. Most of the Corporation’s
electricity generation and related fuel supply contracts are considered to be contracts for delivery or receipt of a non-
financial item in accordance with the Corporation’s expected own use requirements and are not considered to be financial
instruments. As such, the discussion related to commodity price risk is limited to the Corporation’s proprietary trading
business and commodity derivatives used in hedging relationships associated with the Corporation’s electricity generating
activities.

i. Commodity Price Risk –  Proprietary Trading
The Corporation’s Energy Marketing segment conducts proprietary trading activities and uses a variety of instruments to
manage risk, earn trading revenue, and gain market information.

In compliance with the Commodity Exposure Management Policy, proprietary trading activities are subject to limits and
controls, including Value at Risk (“VaR”) limits. The Board approves the limit for total VaR from proprietary trading activities.
VaR is the most commonly used metric employed to track and manage the market risk associated with trading positions.
A VaR measure gives, for a specific confidence level, an estimated maximum pre-tax loss that could be incurred over a
specified period of time. VaR is used to determine the potential change in value of the Corporation’s proprietary trading
portfolio, over a three-day period within a 95 per cent confidence level, resulting from normal market fluctuations. VaR is
estimated using the historical variance/covariance approach.

VaR is a measure that has certain inherent limitations. The use of historical information in the estimate assumes that price
movements in the past will be indicative of future market risk. As such, it may only be meaningful under normal market
conditions. Extreme market events are not addressed by this risk measure. In addition, the use of a three-day measurement
period implies that positions can be unwound or hedged within three days, although this may not be possible if the market
becomes illiquid.

The Corporation recognizes the limitations of VaR and actively uses other controls, including restrictions on authorized
instruments, volumetric and term limits, stress-testing of individual portfolios and of the total proprietary trading portfolio,
and management reviews when loss limits are triggered.

Changes in market prices associated with proprietary trading activities affect net earnings in the period that the price
changes occur. VaR at Dec. 31, 2017, associated with the Corporation’s proprietary trading activities was $5 million (2016
- $2 million, 2015 - $5 million).

ii. Commodity Price Risk - Generation 
The  generation  segments  utilize  various  commodity  contracts  to  manage  the  commodity  price  risk  associated  with
electricity  generation,  fuel  purchases,  emissions,  and  byproducts,  as  considered  appropriate.  A  Commodity  Exposure
Management Policy is prepared and approved annually, which outlines the intended hedging strategies associated with
the Corporation’s generation assets and related commodity price risks. Controls also include restrictions on authorized
instruments, management reviews on individual portfolios, and approval of asset transactions that could add potential
volatility to the Corporation’s reported net earnings.

TransAlta has entered into various contracts with other parties whereby the other parties have agreed to pay a fixed price
for electricity to TransAlta. While not all of the contracts create an obligation for the physical delivery of electricity to other
parties,  the  Corporation  has  the  intention  and  believes  it  has  sufficient  electrical  generation  available  to  satisfy  these
contracts and, where able, has designated these as cash flow hedges for accounting purposes.As a result, changes in market
prices associated with these cash flow hedges do not affect net earnings in the period in which the price change occurs.
Instead, changes in fair value are deferred until settlement through AOCI, at which time the net gain or loss resulting from
the combination of the hedging instrument and hedged item affects net earnings.

TRANSALTA CORPORATION F59

F59

TransAlta Corporation    |    2017  Annual Integrated Report 
 
 
 
Notes to Consolidated Financial Statements

VaR at Dec. 31, 2017, associated with the Corporation’s commodity derivative instruments used in generation hedging
activities was $16 million (2016 - $19 million, 2015 - $24 million).

On asset-backed physical transactions, the Corporation’s policy is to seek own use contract status or hedge accounting
treatment.  For  positions  and  economic  hedges  that  do  not  meet  hedge  accounting  requirements  or  for  short-term
optimization transactions such as buybacks entered into to offset existing hedge positions, these transactions are marked
to the market value with changes in market prices associated with these transactions affecting net earnings in the period
in which the price change occurs. VaR at Dec. 31, 2017, associated with these transactions was $5 million (2016 - $7 million,
2015  - $1 million).

b. Interest Rate Risk
Interest rate risk arises as the fair value or future cash flows of a financial instrument can fluctuate because of changes in
market interest rates. Changes in interest rates can impact the Corporation’s borrowing costs and the capacity payments
received under the PPAs. Changes in the cost of capital may also affect the feasibility of new growth initiatives.

The possible effect on net earnings and OCI due to changes in market interest rates affecting the Corporation’s floating
rate debt, interest-bearing assets, financial instruments measured at fair value through profit or loss, and hedging interest
rate derivatives, is outlined below. The sensitivity analysis has been prepared using management’s assessment that a 15
basis point (2016 - 15 basis point, 2015 - 15 basis point) increase or decrease is a reasonable potential change over the
next quarter in market interest rates.

Year ended Dec. 31

2017

2016

2015

Basis point change

—

—

—

—

1

—

(1)This calculation assumes a decrease in market interest rates.  An increase would have the opposite effect.

Net earnings

increase(1) OCI loss(1)

Net earnings

increase(1) OCI loss(1)

Net earnings

increase(1) OCI loss(1)

c. Currency Rate Risk 
The Corporation has exposure to various currencies, such as the US dollar, the Japanese yen, the euro and the Australian
dollar (“AUD”), as a result of investments and operations in foreign jurisdictions, the net earnings from those operations,
and the acquisition of equipment and services from foreign suppliers.

As part of the Australian Assets transaction described in Note 4(Q), the Corporation agreed to mitigate the risks to TransAlta
Renewables shareholders of adverse changes in the USD and AUD in respect of cash flows from the Australian Assets in
relation to the Canadian dollar to June 30, 2020. The financial effects of the agreements eliminate on consolidation.

In order to mitigate some of the risk that is attributable to non-controlling interests, the Corporation entered into foreign
currency contracts with third parties to the extent of the non-controlling interest percentage of the expected cash flow
over five years to June 30, 2020. Hedge accounting was not applied to these foreign currency contracts. In 2016, a $5
million loss was recognized.  In early 2017, the Corporation revised its hedging strategies related to cash flows from its
foreign operations. These foreign currency contracts became part of the Corporation's revised strategy, as opposed to a
separate hedge program. In 2017, a $6 million foreign exchange loss was recognized.

The Corporation also uses foreign currency contracts to hedge its expected foreign operating cash flows. Hedge accounting
is not applied to these foreign currency contracts.The foreign currency risk sensitivities outlined below are limited to the
risks that arise on financial instruments denominated in currencies other than the functional currency.

The possible effect on net earnings and OCI, due to changes in foreign exchange rates associated with financial instruments
denominated in currencies other than the Corporation’s functional currency, is outlined below. The sensitivity analysis has
been prepared using management’s assessment that an average four cent (2016 and 2015 - four cent) increase or decrease
in these currencies relative to the Canadian dollar is a reasonable potential change over the next quarter.

F60 TRANSALTA CORPORATION

F60

TransAlta Corporation    |    2017  Annual Integrated Report 
Notes to Consolidated Financial Statements

Year ended Dec. 31

2017

2016

2015

Currency

USD

AUD

Total

Net earnings
increase

(decrease)(1) OCI gain(1),(2)

Net earnings

increase(1) OCI gain(1),(2)

Net earnings

decrease(1) OCI gain(1),(2)

(5)

(7)

(12)

—

—

—

(5)

(7)

(12)

—

—

—

2

(3)

(1)

5

—

5

(1) These calculations assume an increase in the value of these currencies relative to the Canadian dollar.  A decrease would have the opposite effect.
(2) The foreign exchange impact related to financial instruments designated as hedging instruments in net investment hedges has been excluded.

II. Credit Risk 
Credit risk is the risk that customers or counterparties will cause a financial loss for the Corporation by failing to discharge
their  obligations,  and  the  risk  to  the  Corporation  associated  with  changes  in  creditworthiness  of  entities  with  which
commercial  exposures  exist.  The  Corporation  actively  manages  its  exposure  to  credit  risk  by  assessing  the  ability  of
counterparties to fulfil their obligations under the related contracts prior to entering into such contracts. The Corporation
makes  detailed  assessments  of  the  credit  quality  of  all  counterparties  and,  where  appropriate,  obtains  corporate
guarantees, cash collateral, third-party credit insurance, and/or letters of credit to support the ultimate collection of these
receivables. For commodity trading and origination, the Corporation sets strict credit limits for each counterparty and
monitors exposures on a daily basis. TransAlta uses standard agreements that allow for the netting of exposures and often
include margining provisions. If credit limits are exceeded, TransAlta will request collateral from the counterparty or halt
trading activities with the counterparty. 

The Corporation uses external credit ratings, as well as internal ratings in circumstances where external ratings are not
available, to establish credit limits for customers and counterparties. The following table outlines the Corporation’s
maximum exposure to credit risk without taking into account collateral held, including the distribution of credit ratings,
as at Dec. 31, 2017:

Trade and other receivables(1)

Long-term finance lease receivables
Risk management assets(1)
Loan receivable(2)

Total

Investment 
grade
 (Per cent)

Non-
investment 
grade
 (Per cent)

Total
 (Per cent)

Total
amount

87

96

99

—

13

4

1

100

100

100

100

100

933

215

903

33

2,084

(1) Letters of credit and cash and cash equivalents are the primary types of collateral held as security related to these amounts. 
(2) The counterparty has no external credit rating. Excludes $5 million current portion classified in trade and  other receivables. 

The Corporation’s maximum exposure to credit risk at Dec. 31, 2017, without taking into account collateral held or right
of  set-off,  is  represented  by  the  current  carrying  amounts  of  receivables  and  risk  management  assets  as  per  the
Consolidated Statements of Financial Position. Letters of credit and cash are the primary types of collateral held as security
related  to  these  amounts.  The  maximum  credit  exposure  to  any  one  customer  for  commodity  trading  operations  and
hedging, including the fair value of open trading, net of any collateral held, at Dec. 31, 2017, was $40 million (2016 - $14
million).

III. Liquidity Risk
Liquidity risk relates to the Corporation’s ability to access capital to be used for proprietary trading activities, commodity
hedging, capital projects, debt refinancing, and general corporate purposes. In December 2015, Moody’s downgraded the
senior unsecured rating on TransAlta’s US bonds one notch from Baa3 to Ba1. As at Dec. 31, 2017, TransAlta maintains
investment grade ratings from three credit rating agencies. TransAlta is focused on strengthening its financial position and
maintaining investment grade credit ratings with these major rating agencies.

Counterparties enter into certain commodity agreements, such as electricity and natural gas purchase and sale contracts,
for the purposes of asset-backed sales and proprietary trading. The terms and conditions of these agreements may contain

TRANSALTA CORPORATION F61

F61

TransAlta Corporation    |    2017  Annual Integrated Report 
 
 
Notes to Consolidated Financial Statements

credit-contingent features (such as downgrades in creditworthiness), which if triggered may result in the Corporation
having to post collateral to its counterparties.

TransAlta manages liquidity risk by monitoring liquidity on trading positions; preparing and revising longer-term financing
plans to reflect changes in business plans and the market availability of capital; and reporting liquidity risk exposure for
proprietary trading activities on a regular basis to the Risk Management Committee, senior management, and the Board.

A maturity analysis of the Corporation’s financial liabilities is as follows:

2018

2019

2020

2021

2022

2023 and
thereafter

Accounts payable and accrued liabilities
Long-term debt(1)

Commodity risk management assets

Other risk management (assets) liabilities

Finance lease obligations

Interest on long-term debt and finance lease 
  obligations(2)

Dividends payable

Total

595

730

(81)

(37)

18

177

34

1,436

—

469

(94)

1

15

153

—

544

—

472

(88)

1

12

125

—

522

—

100

(102)

1

6

102

—

107

—

581

(103)

—

4

95

—

577

—

1,312

(260)

—

14

692

—

1,758

Total

595

3,664

(728)

(34)

69

1,344

34

4,944

(1) Excludes impact of hedge accounting.
(2) Not recognized as a financial liability on the Consolidated Statements of Financial Position.

I. Financial Assets Provided as Collateral
C. Collateral
At Dec. 31, 2017, the Corporation provided $67 million (2016 - $77 million) in cash and cash equivalents as collateral to
regulated clearing agents as security for commodity trading activities. These funds are held in segregated accounts by the
clearing agents. Collateral provided is included in accounts receivable in the statement of financial position.

II. Financial Assets Held as Collateral 
At Dec. 31, 2017, the Corporation held $21 million (2016 - $21 million) in cash collateral associated with counterparty
obligations. Under the terms of the contracts, the Corporation may be obligated to pay interest on the outstanding balances
and to return the principal when the counterparties have met their contractual obligations, or when the amount of the
obligation declines as a result of changes in market value. Interest payable to the counterparties on the collateral received
is  calculated  in  accordance  with  each  contract.  Collateral  held  is  included  in  accounts  payable  in  the  Consolidated
Statements of Financial Position.

III. Contingent Features in Derivative Instruments 
Collateral  is  posted  in  the  normal  course  of  business  based  on  the  Corporation’s  senior  unsecured  credit  rating  as
determined by certain major credit rating agencies. Certain of the Corporation’s derivative instruments contain financial
assurance provisions that require collateral to be posted only if a material adverse credit-related event occurs. If a material
adverse event resulted in the Corporation’s senior unsecured debt falling below investment grade, the counterparties to
such derivative instruments could request ongoing full collateralization.

As at Dec. 31, 2017, the Corporation had posted collateral of $131 million (Dec. 31, 2016 - $116 million) in the form of
letters of credit on derivative instruments in a net liability position. Certain derivative agreements contain credit-risk-
contingent features, which if triggered could result in the Corporation having to post an additional $96 million (Dec. 31,
2016 - $49 million) of collateral to its counterparties.

F62 TRANSALTA CORPORATION

F62

TransAlta Corporation    |    2017  Annual Integrated Report 
 
 
Notes to Consolidated Financial Statements

Inventory held in the normal course of business, which includes coal, emission credits, parts and materials, and natural gas,
15. Inventory
is valued at the lower of cost and net realizable value. Inventory held for Energy Marketing, which includes natural gas and
emission credits and allowances, is valued at fair value less costs to sell.

The components of inventory are as follows:

As at Dec. 31

Parts and materials

Coal

Deferred stripping costs

Natural gas

Purchased emission credits

Total

The change in inventory is as follows:

Balance, Dec 31, 2015

Net use

Writedowns

Reversal of writedowns

Change in foreign exchange rates

Balance, Dec 31, 2016

Net addition

Change in foreign exchange rates

Balance, Dec 31, 2017

No inventory is pledged as security for liabilities.

2017

118

58

11

9

23

219

2016

110

65

12

17

9

213

219

(12)

(9)

13

2

213

11

(5)

219

TRANSALTA CORPORATION F63

F63

TransAlta Corporation    |    2017  Annual Integrated ReportNotes to Consolidated Financial Statements

A reconciliation of the changes in the carrying amount of PP&E is as follows:
16. Property, Plant, and Equipment

Land

Coal
generation

Gas
generation

Renewable
generation

Mining property
and equipment

Assets under
construction

Capital spares
and other(1)

Total

Cost

As at Dec 31, 2015

Additions

Additions - finance lease

Disposals

Impairment charge - Wintering Hills (Note 4)

Reclassification to held for sale (Note 4)

Other (Note 6)

Revisions and additions to decommissioning and
restoration costs

Retirement of assets

Change in foreign exchange rates
Transfers(2)

As at Dec 31, 2016

Additions

Additions - finance lease

Disposals

Impairment charge - Sundance Unit 1 
  (Note 6)

Revisions and additions to decommissioning
and restoration costs

Retirement of assets

Change in foreign exchange rates

Transfers(3)

As at Dec 31, 2017

Accumulated depreciation

As at Dec 31, 2015

Depreciation

Retirement of assets

Disposals

Reclassification to held for sale (Note 4)

Change in foreign exchange rates

Transfers

As at Dec 31, 2016

Depreciation

Retirement of assets

Disposals

Change in foreign exchange rates

Transfers(2)

As at Dec 31, 2017

Carrying amount

As at Dec 31, 2015

As at Dec 31, 2016

As at Dec 31, 2017

95

2

—

(1)

—

—

—

—

—

(1)

—

95

—

—

—

—

—

—

(1)

1

95

—

—

—

—

—

—

—

—

—

—

—

—

—

—

95

95

95

6,091

1,484

3,265

1,208

—

—

—

—

—

—

14

(96)

(38)

(95)

—

—

(3)

—

—

—

12

(3)

(16)

51

1

—

(1)

(28)

(67)

—

4

(14)

(10)

62

—

7

(1)

—

—

—

36

(6)

(3)

24

5,876

1,525

3,212

1,265

—

—

(1)

—

15

(4)

(23)

29

—

14

(1)

—

42

(22)

(7)

24

3,228

1,315

—

—

—

(20)

82

(84)

(87)

—

—

(16)

—

12

(3)

3

121

5,888

461

1,982

3,280

284

(85)

—

—

(28)

(239)

3,212

351

(62)

—

(67)

(3)

873

118

(4)

(1)

—

(10)

51

1,027

67

(2)

(11)

(1)

(8)

810

127

(7)

—

(6)

—

(2)

922

123

(3)

(1)

(4)

—

3,431

1,072

1,037

2,811

2,664

2,457

611

498

910

2,455

2,290

2,191

604

59

(2)

(1)

—

(1)

—

659

76

(18)

—

(4)

—

713

604

606

602

351

353

—

—

—

—

—

—

—

(13)

(284)

407

334

—

—

—

—

—

(2)

(644)

95

—

—

—

—

—

—

—

—

—

—

—

—

—

—

360

12,854

2

—

(3)

—

—

(1)

5

(3)

(4)

37

393

4

—

(1)

—

—

(6)

(2)

(18)

358

7

(9)

(28)

(67)

(1)

71

(122)

(85)

(205)

12,773

338

14

(19)

(20)

151

(119)

(119)

(26)

370

12,973

114

19

(3)

—

—

—

(1)

5,681

607

(101)

(2)

(6)

(39)

(191)

129

5,949

18

(5)

—

—

—

635

(90)

(12)

(76)

(11)

142

6,395

351

407

95

246

264

228

7,173

6,824

6,578

(1) Includes major spare parts and stand-by equipment available, but not in service, and spare parts used for routine, preventive, or planned maintenance.
(2) Net transfers of $14 million relate to the transfer of gas equipment to finance lease receivables.
(3) During the second quarter of 2017, the Corporation reclassified approximately $13 million of capital spares and other assets to inventory.

F64 TRANSALTA CORPORATION

F64

TransAlta Corporation    |    2017  Annual Integrated ReportNotes to Consolidated Financial Statements

The Corporation capitalized $9 million of interest to PP&E in 2017 (2016 - $16 million) at a weighted average rate of 5.87
per cent (2016 – 5.93 per cent).

Finance lease additions in 2017 and 2016 are for mining equipment at the Highvale mine. The carrying amount of total
assets under finance leases as at Dec. 31, 2017 was $65 million (2016 - $76 million).

Goodwill  acquired  through  business  combinations  has  been  allocated  to  CGUs  that  are  expected  to  benefit  from  the
17. Goodwill
synergies of the acquisitions. Goodwill by segments are as follows:

As at Dec. 31

Hydro

Wind and Solar

Energy Marketing

Total goodwill

2017

2016

259

174

30

463

259

175

30

464

For the purposes of the 2017 annual goodwill impairment review, the Corporation determined the recoverable amounts
of the Wind and Solar segment by calculating the fair value less costs of disposal using discounted cash flow projections
based on the Corporation's long-range forecasts for the period extending to the last planned asset retirement in 2073. The
resulting fair value measurement is categorized within Level III of the fair value hierarchy. In 2017, the Corporation relied
on the recoverable amounts determined in 2016 for the Hydro and Energy Marketing segments in performing the 2017
annual goodwill impairment review. No impairment of goodwill arose for any segment.

The key assumption impacting the determination of fair value for the Wind and Solar and Hydro segments are electricity
production and sales prices. Forecasts of electricity production for each facility are determined taking into consideration
contracts for the sale of electricity, historical production, regional supply-demand balances, and capital maintenance and
expansion plans. Forecasted sales prices for each facility are determined by taking into consideration contract prices for
facilities subject to long- or short-term contracts, forward price curves for merchant plants, and regional supply-demand
balances. Where forward price curves are not available for the duration of the facility’s useful life, prices are determined
by  extrapolation  techniques  using  historical  industry  and  company-specific  data.  Electricity  prices  used  in  these  2017
models ranged between $22 to $218 per MWh during the forecast period (2016 - $32 to $301 per MWh). Discount rates
used for the goodwill impairment calculation in 2017 ranged from 5.5 per cent to 6.0 per cent (2016 – 5.5 per cent to 6.0
per cent). No reasonable possible change in the assumptions would have resulted in an impairment of goodwill.

TRANSALTA CORPORATION F65

F65

TransAlta Corporation    |    2017  Annual Integrated ReportNotes to Consolidated Financial Statements

A reconciliation of the changes in the carrying amount of intangible assets is as follows:
18. Intangible Assets

Coal rights

Software
and other

Power
sale
contracts

Intangibles
under
development

Total

178

256

223

—

—

—

—

—

178

—

—

—

178

109

6

—

115

—

8

2

125

69

63

53

—

3

(3)

(1)

13

268

31

(3)

18

314

142

24

(3)

163

24

1

—

188

114

105

126

—

—

—

—

—

223

—

—

—

223

52

8

—

60

9

—

(2)

67

171

163

156

15

21

—

—

(1)

(11)

24

20

—

(15)

29

—

—

—

—

—

—

—

—

15

24

29

672

21

3

(3)

(2)

2

693

51

(3)

3

744

303

38

(3)

338

41

1

—

380

369

355

364

Cost

As at Dec. 31, 2015

Additions

Additions - capital lease

Retirements

Change in foreign exchange rates

Transfers

As at Dec. 31, 2016

Additions

Change in foreign exchange rates

Transfers

As at Dec. 31, 2017

Accumulated amortization

As at Dec. 31, 2015

Amortization

Retirements

As at Dec. 31, 2016

Amortization

Change in foreign exchange rates

Transfers

As at Dec. 31, 2017

Carrying amount

As at Dec. 31, 2015

As at Dec. 31, 2016

As at Dec. 31, 2017

F66 TRANSALTA CORPORATION

F66

TransAlta Corporation    |    2017  Annual Integrated ReportThe components of other assets are as follows:
19. Other Assets

As at Dec. 31

South Hedland prepaid transmission access and distribution

Deferred licence fees

Project development costs

Deferred service costs

Mississauga long-term receivable (Note 4)

Long-term prepaids and other assets

Loan receivable

Keephills Unit 3 transmission deposit

Total other assets

Notes to Consolidated Financial Statements

2017

2016

75

13

53

15

—

44

33

4

237

—

15

46

16

116

44

—

5

242

South Hedland prepaid costs relate to certain prepaid electricity transmission and distribution costs that are amortized
on a straigh-line basis over the South Hedland PPA contract life. 

Deferred licence fees consist primarily of licences to lease the land on which certain generating assets are located, and are
amortized on a straight-line basis over the useful life of the generating assets to which the licences relate.

Project development costs are primarily comprised of the Corporation’s Sundance 7 and Dunvegan projects in Alberta. In
December 2015, the Corporation repurchased its partner’s 50 per cent share in TAMA Power, the jointly controlled entity
developing the Sundance 7 project, for consideration of $10 million, payable in four years and an option for its partner to
re-enter the development projects of TAMA Power at accumulated cost during this period.

Deferred service costs are TransAlta’s contracted payments for shared capital projects required at the Genesee Unit 3 and
Keephills Unit 3 sites. These costs are amortized over the life of these projects.

Mississauga long-term receivable relates to amounts recognized as a result of entering into the new contract. Fixed monthly
payments are to be received until Dec. 31, 2018. See Notes 4  and 12 for further details.

Long-term  prepaids  and  other  assets  include  the  funded  portion  of  the  TransAlta  Energy  Transition  Bill  commitments
discussed in Note 32.

The loan receivable relates to the advancement by the Corporation's subsidiary, Kent Hills Wind LP, of $38 million (net) of
the Kent Hills Wind bond financing proceeds to its 17 per cent  partner.  The loan bears interest at 4.55 per cent, with
interest payable quarterly, commencing on Dec. 31, 2017, is unsecured and matures on Oct. 2, 2022. The Corporation may,
at any time, demand repayment of any advances outstanding for the purpose of funding any capital required. The current
portion of $5 million is included in accounts receivable and the long-term portion of the $33 million is included in other
assets.

The Keephills Unit 3 transmission deposit is TransAlta’s proportionate share of a provincially required deposit. The full
amount of the deposit is anticipated to be reimbursed over the next four years to 2021, as long as certain performance
criteria are met.

TRANSALTA CORPORATION F67

F67

TransAlta Corporation    |    2017  Annual Integrated ReportNotes to Consolidated Financial Statements

The change in decommissioning and other provision balances is as follows:
20. Decommissioning and Other Provisions

Decommissioning and
restoration

Balance, Dec 31, 2015

Liabilities incurred

Liabilities settled

Accretion

Revisions in estimated cash flows

Revisions in discount rates

Reversals

Change in foreign exchange rates

Balance, Dec 31, 2016

Liabilities incurred

Liabilities settled
Liabilities disposed(1)

Accretion
Revisions in estimated cash flows(2)
Revisions in discount rates(2)

Reversals

Change in foreign exchange rates

Balance, Dec 31, 2017

233

11

(23)

19

12

44

—

(3)

293

3

(19)

(8)

23

41

110

—

(6)

437

Other

165

12

(36)

1

5

—

(96)

(1)

50

19

(31)

—

—

—

1

(4)

(2)

33

Total

398

23

(59)

20

17

44

(96)

(4)

343

22

(50)

(8)

23

42

110

(4)

(8)

470

(1) Relates to  the disposition of the Solomon  power station and the sale of the Wintering Hills wind facility.
(2) During 2017, mainly as a result of the OCA (see Note 4(H)), the discount rates used for the Canadian coal and mining operations decommissioning provisions were
changed to the use of 5 to 15-year rates. The use of lower, shorter-term discount rates increased the corresponding liabilities. On average, these rates decreased by
approximately 1.60 to 2.10 per cent. Additionally, the amount and timing of cash outflows for certain Canadian coal plants and mining operations was also revised,
resulting in an increase to the corresponding liabilities.

Balance, Dec 31, 2016

Current portion

Non-current portion

Balance, Dec 31, 2017

Current portion

Non-current portion

Decommissioning and
restoration

293

27

266

437

40

397

Other

50

12

38

33

27

6

Total

343

39

304

470

67

403

F68 TRANSALTA CORPORATION

F68

TransAlta Corporation    |    2017  Annual Integrated ReportNotes to Consolidated Financial Statements

A provision has been recognized for all generating facilities and mines for which TransAlta is legally, or constructively,
required to remove the facilities at the end of their useful lives and restore the sites to their original condition. TransAlta
A. Decommissioning and Restoration
estimates that the undiscounted amount of cash flow required to settle these obligations is approximately $1 billion, which
will be incurred between 2018 and 2073. The majority of the costs will be incurred between 2020 and 2050. At Dec. 31,
2017, the Corporation had provided a surety bond in the amount of US$139 million (2016 - US$139 million) in support of
future decommissioning obligations at the Centralia coal mine. At Dec. 31, 2017, the Corporation had provided letters of
credit in the amount of $120 million (2016 - $117 million) in support of future decommissioning obligations at the Alberta
mine.  Some  of  the  facilities  that  are  co-located  with  mining  operations  do  not  currently  have  any  decommissioning
obligations recorded as the obligations associated with the facilities are indeterminate at this time.

Other provisions include amounts related to a portion of the Corporation’s fixed price commitments under several natural
gas  transportation  contracts  for  firm  transportation  that  is  not  expected  to  be  used  and  for  vacant  leased  premises.
B. Other Provisions
Accordingly, the unavoidable costs of meeting these obligations exceed the economic benefits expected to be received.
The contracts extend to 2023.

Other  provisions  also  include  provisions  arising  from  ongoing  business  activities  and  include  amounts  related  to
commercial  disputes  between  the  Corporation  and  customers  or  suppliers.  Information  about  the  expected  timing  of
settlement and uncertainties that could impact the amount or timing of settlement has not been provided as this may
impact the Corporation’s ability to settle the provisions in the most favourable manner.

During 2015, the Corporation recorded a significant adjustment to other provisions, relating to the force majeure claim at
Keephills 1. However, on Nov. 18, 2016, force majeure relief was granted to the Corporation and accordingly approximately
$94 million was reversed during the last quarter of 2016 as disclosed in Note 4(I).

TRANSALTA CORPORATION F69

F69

TransAlta Corporation    |    2017  Annual Integrated Report 
 
Notes to Consolidated Financial Statements

21. Credit Facilities, Long-Term Debt, and Finance Lease Obligations
The amounts outstanding are as follows:
A. Credit Facilities, Debt and Letters of Credit

As at Dec. 31

Credit facilities(2)

Debentures
Senior notes(3)
Non-recourse(4)
Other(5)

Finance lease obligations

Less: current portion of long-term debt

Less: current portion of finance lease obligations

Total current long-term debt and finance lease
obligations

Total credit facilities, long-term debt, and finance
lease obligations

2017

2016

Face
value

—

1,051

2,158

1,048

54

4,311

Interest(1)

—%

6.0%

5.0%

4.5%

9.2%

Carrying
value

27

1,046

1,499

1,022

44

3,638

69

3,707

(729)

(18)

(747)

2,960

Face
value

27

1,051

1,510

1,032

44

3,664

Interest(1)

Carrying
value

2.8%

6.0%

6.0%

4.3%

9.2%

—

1,045

2,151

1,038

54

4,288

73

4,361

(623)

(16)

(639)

3,722

(1) Interest is an average rate weighted by principal amounts outstanding before the effect of hedging.
(2) Composed of bankers’ acceptances and other commercial borrowings under long-term committed credit facilities.
(3) US face value at Dec. 31, 2017 - US$1.2 billion (Dec. 31, 2016 - US$1.6 billion).
(4) Includes US$27 million at Dec. 31, 2017 (Dec. 31, 2016 - US$53 million).
(5) Includes US$24 million at Dec. 31, 2017 (Dec. 31, 2016 - US$29 million) of tax equity financing.

Credit  facilities  are  comprised  of  the  Corporation's  $1.0  billion  committed  syndicated  bank  credit  facility,  TransAlta
Renewables $0.5 billion committed syndicated bank credit facility, and the Corporation's US$200 million and $240 million
committed bilateral facilities. These facilities expire in 2021, 2021, 2020, and 2019 respectively. The $1.5 billion (Dec. 31,
2016 - $1.5 billion) committed syndicated bank facilities are the primary source for short-term liquidity after the cash flow
generated from the Corporation's business. Interest rates on the credit facilities vary depending on the option selected -
Canadian prime, bankers' acceptances, US LIBOR, or US base rate -in accordance with a pricing grid that is standard for
such facilities. 

During 2017: 
▪

TransAlta Renewables entered into a syndicated credit agreement giving it access to a $0.5 billion committed credit
facility. The agreement is fully committed for four years, expiring in 2021. Interest rates on the credit facilities vary
depending on the option selected - Canadian prime, bankers' acceptances, US LIBOR, or US base rate -in accordance
with a pricing grid that is standard for such facilities. The facility is subject to a number of customary covenants and
restrictions in order to maintain access to the funding commitments. In conjunction with the new credit agreement,
the $350 million credit facility provided by TransAlta was cancelled. The Corporation’s consolidated liquidity remains
unchanged,  as  the  Corporation’s  credit  facility  decreased  by  $0.5  billion  to  $1.0  billion  in  total,  while  TransAlta
Renewables’ facility increased to a total of $0.5 billion; and
the Corporation extended its four-year revolving $1.0 billion committed syndicated credit facility and three bilateral
credit facilities by one year to 2021 and 2019, respectively, with key terms and covenants unchanged.

During 2016, the Corporation:
▪

paid out the credit facilities' balance from a combination of cash flows from operations and net cash proceeds of $173
million received from the sale of the economic interest of the Canadian Assets that closed Jan. 6, 2016 (see Note 4);
extended the four-year revolving $1.5 billion committed syndicated credit facility and three bilateral credit facilities
by one year to 2020 and 2018, respectively, with key terms and covenants unchanged; and
extended the four-year US$200 million bilateral credit facility to 2020. The amount available was reduced from US
$300 million to US$200 million. The remaining key terms and covenants were unchanged.

▪

▪

▪

F70 TRANSALTA CORPORATION

F70

TransAlta Corporation    |    2017  Annual Integrated Report 
 
Notes to Consolidated Financial Statements

The Corporation has a total of $2.0 billion (Dec. 31, 2016 - $2.0 billion) of committed credit facilities, including TransAlta
Renewables’ credit facility of $500 million. In total, $1.4 billion (Dec. 31, 2016 - $1.4 billion) is not drawn. At Dec. 31, 2017,
the $0.6 billion (Dec. 31, 2016 - $0.6 billion) of credit utilized under these facilities was comprised of actual drawings of  nil
(Dec. 31, 2016 - nil) and letters of credit of $0.6 billion (Dec. 31, 2016 - $0.6 billion). The Corporation is in compliance with
the terms of the credit facilities and all undrawn amounts are fully available.  In addition to the $1.4 billion available under
the credit facilities, the Corporation also has $314 million of available cash and cash equivalents. 

Debentures bear interest at fixed rates ranging from 5.0 per cent to 7.3 per cent and have maturity dates ranging from
2019 to 2030.

Senior notes bear interest at rates ranging from 4.5 per cent to 6.9 per cent and have maturity dates ranging from 2018 to
2040.

During 2017, the Corporation's US$400 million 1.90 per cent senior note matured and was paid out using existing liquidity.
The repayment was hedged with a currency swap. The maturity value of the bond was $434 million.

A total of US$480 million (2016 - US$630 million) of the senior notes has been designated as a hedge of the Corporation’s
net investment in US foreign operations.

Non-recourse debt consists of bonds and debentures that have maturity dates ranging from 2023 to 2033 and bear interest
at rates ranging from 2.95 per cent to 5.36 per cent.

TransAlta Renewables closed a $260 million non-recourse bond offering on Oct. 2, 2017, by way of a private placement.
At the same time, the Corporation early redeemed the $191 million face value CHD non-recourse debentures on Oct. 12,
2017. See Note 4(F) for further details.

During 2016:
▪
▪

the Corporation’s $27 million 5.69 per cent non-recourse debenture matured and was paid out using existing liquidity;
the Corporation’s subsidiary New Richmond Wind L.P. issued a non-recourse bond in the amount of $159 million,
bearing interest at 3.963 per cent, with principal and interest payable semi-annually, and maturing on June 30, 2032
(see Note 4(M));
the Corporation made a scheduled semi-annual $4 million principal payment on the New Richmond Wind L.P. bond;
the Corporation made scheduled semi-annual principal payments of approximately $35 million on the Melancthon
Wolfe Wind L.P. bond;
the Corporation’s subsidiary TAPC Holdings LP issued a non-recourse bond in the amount of $202.5 million, bearing
a variable interest rate at the Canadian Dollar Offered Rate plus 395 basis points, with principal and interest payable
quarterly, maturing on Dec. 31, 2030 (see Note 4(J)), and;
early redeemed $10 million of non-recourse bonds, which resulted in a $1 million loss recognized in interest expense.

▪
▪

▪

▪

Other consists of an unsecured commercial loan obligation that bears interest at 5.9 per cent and matures in 2023, requiring
annual payments of interest and principal, and tax equity financing assumed in the Lakeswind wind acquisition (see Note
4(P)).

TransAlta’s debt has terms and conditions, including financial covenants, that are considered normal and customary. As at
Dec. 31, 2017, the Corporation was in compliance with all debt covenants.

The Melancthon Wolfe Wind, Pingston, TAPC Holdings LP, New Richmond, KHWLP, and Mass Solar non-recourse bonds
of $1,022 million (Dec. 31, 2016 - $845 million) are subject to customary financing conditions and covenants that may
B. Restrictions on Non-Recourse Debt 
restrict the Corporation’s ability to access funds generated by the facilities’ operations. Upon meeting certain distribution
tests, typically performed once per quarter, the funds are able to be distributed by the subsidiary entities to their respective
parent entity. These conditions include meeting a debt service coverage ratio prior to distribution, which was met by these
entities in the fourth quarter. However, funds in these entities that have accumulated since the fourth quarter test will
remain there until the next debt service coverage ratio can be calculated in the first quarter of 2018. At Dec. 31, 2017, $35
million (Dec. 31, 2016 -$24 million) of cash was subject to these financial restrictions.

TRANSALTA CORPORATION F71

F71

TransAlta Corporation    |    2017  Annual Integrated Report 
 
Notes to Consolidated Financial Statements

Additionally, certain non-recourse bonds require that certain reserve accounts be established and funded through cash
held on deposit and/or by providing letters of credit. The Corporation has elected to use letters of credit as at Dec. 31,
2017. However, as at Dec. 31, 2017, $1 million of cash was on deposit for certain reserve accounts that do not allow the
use of letter of credits and was not available for general use.

Non-recourse debts of $848 million in total (Dec. 31, 2016 - $644 million) are each secured by a first ranking charge over
all  of  the  respective  assets  of  the  Corporation’s  subsidiaries  that  issued  the  bonds,  which  includes  certain  renewable
C. Security
generation facilities with total carrying amounts of $1,107 million at Dec. 31, 2017 (Dec. 31, 2016 - $956 million). At Dec.
31, 2017, a non-recourse bond of approximately $174 million (Dec. 31, 2016 - $201 million) is secured by a first ranking
charge over the equity interests of the issuer that issued the non-recourse bond. 

D. Principal Repayments

Principal repayments(1)

(1) Excludes impact of derivatives.

2018

730

2019

469

2020

472

2021

100

2022

581

2023 and
thereafter

1,312

Total

3,664

The Corporation has $30 million of proceeds from the KHWLP project financing which is held in a construction reserve
account. The proceeds will be released from the construction reserve account upon certain conditions being met, including
E. Restricted Cash
commissioning of the Kent Hills 3 wind project.

F72 TRANSALTA CORPORATION

F72

TransAlta Corporation    |    2017  Annual Integrated Report 
Notes to Consolidated Financial Statements

Amounts payable for mining assets and other finance leases are as follows:
F. Finance Lease Obligations

As at Dec. 31

Within one year

Second to fifth years inclusive

More than five years

Less: interest costs

Total finance lease obligations

Included in the Consolidated Statements of Financial Position as:

Current portion of finance lease obligations

Long-term portion of finance lease obligations

2017

2016

Minimum
lease
payments

Present value of
minimum lease
payments

Minimum
lease
payments

Present value of
minimum lease
payments

19

39

15

73

—

73

20

43

15

78

9

69

18

51

69

20

38

11

69

—

69

19

44

21

84

11

73

16

57

73

Letters  of  credit  issued  by  TransAlta  are  drawn  on  its  committed  syndicated  credit  facility,  its  $240  million  bilateral
committed credit facilities, and its uncommitted $100 million demand letter of credit facility. Letters of credit issued by
G. Letters of Credit
TransAlta Renewables are drawn on its uncommitted $100 million demand letter of credit facility.

Letters of credit are issued to counterparties under various contractual arrangements with the Corporation and certain
subsidiaries  of  the  Corporation.  If  the  Corporation  or  its  subsidiary  does  not  perform  under  such  contracts,  the
counterparty may present its claim for payment to the financial institution through which the letter of credit was issued.
Any  amounts  owed  by  the  Corporation  or  its  subsidiaries  under  these  contracts  are  reflected  in  the  Consolidated
Statements of Financial Position. All letters of credit expire within one year and are expected to be renewed, as needed, in
the normal course of business. The total outstanding letters of credit as at Dec. 31, 2017, was $677 million (2016 - $566
million) with no (2016 - nil) amounts exercised by third parties under these arrangements.

TRANSALTA CORPORATION F73

F73

TransAlta Corporation    |    2017  Annual Integrated Report 
 
Notes to Consolidated Financial Statements

The components of defined benefit obligation and other long-term liabilities are as follows:
22. Defined Benefit Obligation and Other Long-Term Liabilities

As at Dec. 31

Defined benefit obligation (Note 27)

Deferred coal revenues

Long-term incentive accruals (Note 26)

Other

Total

2017

235

60

16

48

359

2016

208

62

14

46

330

Deferred coal revenues consist of amounts received from the Corporation’s Keephills Unit 3 joint operation partner for
future coal deliveries. These amounts are being amortized into revenue over the life of the coal supply agreement, since
commercial operations of Keephills Unit 3 began on Sept. 1, 2011.

Other includes $9 million (2016 - $10 million) relating to a reimbursement received for costs of the New Richmond terminal
station, which is being amortized to revenue over the term of the related PPA.

23. Common Shares
 TransAlta is authorized to issue an unlimited number of voting common shares without nominal or par value.
A. Issued and Outstanding

As at Dec. 31

Issued and outstanding, beginning of year

Issued under the dividend reinvestment and share purchase plan

Amounts receivable under Employee Share Purchase Plan

Issued and outstanding, end of year

2017

2016

Common
shares
 (millions)

287.9

—

Amount

3,095

—

287.9

3,095

—

(1)

287.9

3,094

Common
shares
(millions)

284.0

3.9

287.9

—

287.9

Amount

3,077

18

3,095

(1)

3,094

The Corporation initially adopted the Shareholder Rights Plan in 1992, which has been revised since that time to ensure
conformity  with  current  practices.  As  required,  the  Shareholder  Rights  Plan  must  be  put  before  the  Corporation’s
B. Shareholder Rights Plan
shareholders every three years for approval, and it was last approved on April 22, 2016. The primary objective of the
Shareholder  Rights  Plan  is  to  provide  the  Board  sufficient  time  to  explore  and  develop  alternatives  for  maximizing
shareholder value if a takeover bid is made for the Corporation and to provide every shareholder with an equal opportunity
to  participate  in  such  a  bid.  When  an  acquiring  shareholder  commences  a  bid  to  acquire  20  per  cent  or  more  of  the
Corporation’s common shares, other than by way of a “permitted bid” (as defined in the Shareholder Rights Plan), where
the offer is made to all shareholders by way of a takeover bid circular, the rights granted under the Shareholder Rights Plan
become exercisable by all shareholders except those held by the acquiring shareholder. Each right will entitle a shareholder,
other than the acquiring shareholder, to acquire an additional $200 worth of common shares for $100.

F74 TRANSALTA CORPORATION

F74

TransAlta Corporation    |    2017  Annual Integrated Report 
Notes to Consolidated Financial Statements

, Dividend Reinvestment, and Optional Common Share Purchase Plan (the

On Feb. 21, 2012, the Corporation added a Premium DividendTM Component to its existing dividend reinvestment plan.
C. Premium Dividend™
The amended and restated plan provided eligible shareholders with two options: i) to reinvest dividends at a current three
“ Plan” )
per  cent  discount  to  the  average  market  price  towards  the  purchase  of  new  common  shares  of  the  Corporation  (the
Dividend Reinvestment Component) or; ii) to receive a premium cash payment equivalent to 102 per cent of the reinvested
dividends (the Premium DividendTM

 Component).

The  Corporation  suspended  the  Premium  Dividend™ Component  of  the  Plan  following  the  payment  of  the  quarterly
dividend on July 1, 2013. The Corporation’s Dividend Reinvestment and Optional Common Share Purchase Plan, separate
components of the Plan, remained effective in accordance with their current terms. On Jan. 14, 2016, the Corporation
announced the suspension of the Premium DividendTM, Dividend Reinvestment and Optional Common Share Purchase
Plan, in order to stop shareholder dilution.

On Jan. 1, 2016, 3.9 million common shares were issued for dividends reinvested.

Year ended Dec. 31
D. Earnings per Share
Net earnings (loss) attributable to common shareholders

Basic and diluted weighted average number of common shares outstanding (millions)

Net earnings (loss) per share attributable to common shareholders, basic and diluted

2017

(190)

288

(0.66)

2016

117

288

0.41

2015

(24)

280

(0.09)

On Jan. 14, 2016, the Corporation announced the resizing of its dividend from $0.72 annually to $0.16 annually, as part of
a plan to maximize the Company’s long-term financial flexibility.
E. Dividends

On Oct. 30, 2017, the Corporation declared a quarterly dividend of $0.04 per common share, payable on Jan. 1, 2018.

On Feb. 2, 2018, the Corporation declared a quarterly dividend of $0.04 per common share, payable on Apr. 1, 2018.

There have been no other transactions involving common shares between the reporting date and the date of completion
of these consolidated financial statements.

TRANSALTA CORPORATION F75

F75

TransAlta Corporation    |    2017  Annual Integrated Report 
 
Notes to Consolidated Financial Statements

24. Preferred Shares
All preferred shares issued and outstanding are non-voting cumulative redeemable fixed rate first preferred shares.
A. Issued and Outstanding

As at Dec. 31

Series

Series A

Series B

Series C

Series E

Series G

Issued and outstanding, end of year

2017

2016

Number of
shares
 (millions)

Number of
shares
(millions)

Amount

Amount

10.2

1.8

11.0

9.0

6.6

38.6

248

45

269

219

161

942

10.2

1.8

11.0

9.0

6.6

38.6

248

45

269

219

161

942

I. Series E Cumulative Redeemable Rate Reset Preferred Shares Conversion
On Sept. 17, 2017, the Corporation announced that, after taking into account all election notices received by the Sept. 15,
2017, deadline for the conversion of the Cumulative Redeemable Rate Reset Preferred Shares, Series E (the “Series E
Shares”) into Cumulative Redeemable Floating Rate Preferred Shares Series F (the “Series F Shares”), there were 133,969
Series E Shares tendered for conversion, which was less than the one million shares required to give effect to conversions
into Series F Shares. Therefore, none of the Series E Shares were converted into Series F Shares on Sept. 30, 2017. As a
result, the Series E Shares will be entitled to receive quarterly fixed cumulative preferential cash dividends, if, as and when
declared by the Board. The annual dividend rate for the Series E Shares for the five-year period from and including Sept.
30, 2017 to, but excluding, Sept. 30, 2022, will be 5.194 per cent, which is equal to the five-year Government of Canada
bond yield of 1.544 per cent, determined as of Aug. 31, 2017, plus 3.65 per cent, in accordance with the terms of the Series
E Shares. 

II. Series C Cumulative Redeemable Rate Reset Preferred Shares Conversion
On June 16, 2017, the Corporation announced that after, taking into account all election notices received by the June 15,
2017, deadline for the conversion of the Cumulative Redeemable Rate Reset Preferred Shares, Series C (the “Series C
Shares”) into Cumulative Redeemable Floating Rate Preferred Shares Series D (the “Series D Shares”), there were 827,628
Series C Shares tendered for conversion, which was less than the one million shares required to give effect to conversions
into Series D Shares. Therefore, none of the Series C Shares were converted into Series D Shares on June 30, 2017. As a
result, the Series C Shares will be entitled to receive quarterly fixed cumulative preferential cash dividends, if, as and when
declared by the Board. The annual dividend rate for the Series C Shares for the five-year period from and including June
30, 2017 to, but excluding, June 30, 2022, will be 4.027 per cent, which is equal to the five-year Government of Canada
bond yield of 0.927 per cent, determined as of May 31, 2017, plus 3.10 per cent, in accordance with the terms of the Series
C Shares. 

III. Series A Cumulative Fixed Redeemable Rate Reset Preferred Shares Conversion 
On March 17, 2016, the Corporation announced that 1,824,620 of its 12.0 million Series A Cumulative Fixed Redeemable
Rate  Reset  Preferred  Shares  (“Series A  Shares”)  were  tendered  for  conversion,  on  a  one-for-one  basis,  into  Series B
Cumulative Redeemable Floating Rate Preferred Shares (“Series B Shares”) after having taken into account all election
notices. As a result of the conversion, the Corporation has 10.2 million Series A Shares and 1.8 million Series B Shares issued
and outstanding at Dec. 31, 2017.

The Series A Shares pay fixed cumulative preferential cash dividends on a quarterly basis, for the five-year period from and
including March 31, 2016 ,to, but excluding, March 31, 2021, if, as and when declared by the Board based on an annual
fixed dividend rate of 2.709 per cent.

The Series B Shares pay quarterly floating rate cumulative preferential cash dividends for the five-year period from and
including March 31, 2016, to, but excluding, March 31, 2021, if, as and when declared by the Board based on an annualized
fixed dividend rate of 2.539 per cent, and will reset every quarter.

F76 TRANSALTA CORPORATION

F76

TransAlta Corporation    |    2017  Annual Integrated ReportNotes to Consolidated Financial Statements

IV. Preferred Share Series Information 
The holders are entitled to receive cumulative fixed quarterly cash dividends at a specified rate, as approved by the Board.
After an initial period of approximately five years from issuance and every five years thereafter (“Rate Reset Date”), the
fixed rate resets to the sum of the then five-year Government of Canada bond yield (the fixed rate “Benchmark”) plus a
specified spread. Upon each Rate Reset Date, they are also:

▪

▪

Redeemable at the option of the Corporation, in whole or in part, for $25.00 per share, plus all declared and unpaid
dividends at the time of redemption. 

Convertible  at  the  holder’s  option  into  a  specified  series  of  non-voting  cumulative  redeemable  floating  rate  first
preferred shares that pay cumulative floating rate quarterly cash dividends, as approved by the Board, based on the
sum of the then Government of Canada 90-day Treasury Bill rate (the floating rate “Benchmark”) plus a specified
spread. The cumulative floating rate first preferred shares are also redeemable at the option of the Corporation and
convertible back into each original cumulative fixed rate first preferred share series, at each subsequent Rate Reset
Date, on the same terms as noted above.

Characteristics specific to each first preferred share series as at Dec. 31, 2017, are as follows:

Series

Rate during term

Annual dividend
rate per share ($)

Next
Conversion
date

Rate spread
over Benchmark
 (per cent)

Convertible to
Series

A

B

C

D

E

F

G

H

Fixed

Floating

Fixed

Floating

Fixed

Floating

Fixed

Floating

0.67725

March 31, 2021

0.7255

March 31, 2021

1.00675

June 30, 2022

—

—

1.2985

Sept. 30, 2022

—

1.325

—

—

Sept. 30, 2019

—

2.03

2.03

3.10

3.10

3.65

3.65

3.80

3.80

B

A

D

C

F

E

H

G

The following table summarizes the preferred share dividends declared in 2017, 2016, and 2015:
B. Dividends

Series

A

B

C

E

G

Total for the year

Total dividends declared ($)

2017

2016

2015

5

1

9

8

7

30

10

1

16

14

11

52

14

—

13

11

8

46

On Feb. 2, 2018, the Corporation declared a quarterly dividend of $0.16931 per share on the Series A preferred shares,
$0.17889 per share on the Series B preferred shares, $0.25169 per share on the Series C preferred shares, $0.32463 per
share on the Series E preferred shares, and $0.33125 per share on the Series G preferred shares, all payable on March 31,
2018.

TRANSALTA CORPORATION F77

F77

TransAlta Corporation    |    2017  Annual Integrated Report 
Notes to Consolidated Financial Statements

The components of, and changes in, accumulated other comprehensive income (loss) are as follows:
25. Accumulated Other Comprehensive Income

Currency translation adjustment

Opening balance, Jan. 1

Losses on translating net assets of foreign operations, net of reclassifications to net earnings, net of tax(1)

Gains on financial instruments designated as hedges of foreign operations, 
  net of reclassifications to net earnings, net of tax(2)

Balance, Dec. 31

Cash flow hedges

Opening balance, Jan. 1

Gains on derivatives designated as cash flow hedges, 
  net of reclassifications to net earnings and to non-financial assets, net of tax(3)

Balance, Dec. 31

Employee future benefits

Opening balance, Jan. 1

Net actuarial gains (losses) on defined benefit plans, net of tax(4)

Balance, Dec. 31

Other

Opening balance, Jan. 1

Change in ownership of TransAlta Renewables

Intercompany available-for-sale investments

Balance, Dec. 31

Accumulated other comprehensive income

(1) Net of income tax of 11 million for the year ended Dec. 31, 2017 (2016 - 11 million ).
(2) Net of income tax of 4 million for the year ended Dec. 31, 2017 (2016 - 5 million ).
(3) Net of income tax of 108 million for the year ended Dec. 31, 2017 (2016 - 51 million ).
(4) Net of income tax of 4 million for the year ended Dec. 31, 2017 (2016 - 4 million ).

2017

2016

(1)

(89)

64

(26)

456

106

562

(38)

(6)

(44)

(18)

4

11

(3)

489

52

(71)

18

(1)

350

106

456

(46)

8

(38)

(3)

—

(15)

(18)

399

F78 TRANSALTA CORPORATION

F78

TransAlta Corporation    |    2017  Annual Integrated ReportNotes to Consolidated Financial Statements

The Corporation has the following share-based payment plans:
26. Share-Based Payment Plans

Under the PSU and RSU Plan, grants may be made annually, but are measured and assessed over a three-year performance
period. Grants are determined as a percentage of participants’ base pay and are converted to PSUs or RSUs on the basis
A. Performance Share Unit (“ PSU” ) and Restricted Share Unit (“ RSU” ) Plan
of the Corporation’s common share price at the time of grant. Vesting of PSUs is subject to achievement over a three-year
period of three performance measures: growth in funds from operation per share, growth in free cash flow per share, and
growth in the Corporation’s total shareholder return relative to the S&P/TSX Composite Index. RSUs are subject to a three-
year cliff-vesting requirement. RSUs and PSUs track the Corporation’s share price over the three-year period and accrue
dividends as additional units at the same rate as dividends paid on the Corporation’s common shares. The Human Resources
Committee of the Board has the discretion to determine whether payments on settlement are made through purchase of
shares on the open market or in cash. The expense related to this plan is recognized during the period earned, with the
corresponding payable recorded in liabilities. The liability is valued at the end of each reporting period using the closing
price of the Corporation’s common shares on the Toronto Stock Exchange.

The pre-tax compensation expense related to PSUs and RSUs in 2017 was $15 million (2016 - $17 million , 2015 - $3 million
reversal), which is included in operations, maintenance, and administration expense in the Consolidated Statements of
Earnings (Loss).

Under the DSU Plan, members of the Board and executives may, at their option, purchase DSUs using certain components
of their fees or pay. A DSU is a notional share that has the same value as one common share of the Corporation and fluctuates
B. Deferred Share Unit (“ DSU” ) Plan
based on the changes in the value of the Corporation’s common shares in the marketplace. DSUs accrue dividends as
additional DSUs at the same rate as dividends are paid on the Corporation’s common shares. DSUs are redeemable in cash
and may not be redeemed until the termination or retirement of the director or executive from the Corporation.

The Corporation accrues a liability and expense for the appreciation in the common share value in excess of the DSU’s
purchase price and for dividend equivalents earned. The pre-tax compensation expense related to the DSUs was $1 million
in 2017 (2016 - $3 million, 2015 - $2 million reversal).

The Corporation is authorized to grant options to purchase up to an aggregate of 13 million common shares at prices based
on the market price of the shares on the TSX as determined on the grant date. The plan provides for grants of options to
C. Stock Option Plans
all full-time employees, including executives, designated by the Human Resources Committee from time to time.

In March 2017, the Corporation granted executive officers of the Corporation a total of 0.7 million stock options with an
exercise price of $7.25 that vest after a three-year period and expire seven years after issuance.  In February 2016, the
Corporation granted executive officers of the Corporation a total of 1.1 million stock options with an exercise price of $5.93
that vest after a three-year period and expire seven years after issuance. The expense recognized relating to these grants
during 2017 was approximately $1 million (2016 - less than $1 million).

TRANSALTA CORPORATION F79

F79

TransAlta Corporation    |    2017  Annual Integrated Report 
 
 
Notes to Consolidated Financial Statements

The total options outstanding and exercisable under these stock option plans at Dec. 31, 2017, are outlined below:

Range of exercise prices
($ per share)

5.00 - 8.00
22.00 - 30.00(1)
31.00 - 48.00(1)

5.00 - 48.00

 (1) Options currently exercisable.

Options outstanding

 Number of
options at
Dec. 31,
2017

Weighted
average
remaining
contractual
life (years)

Weighted
average
exercise
price
 ($ per share)

1.9

0.5

0.5

2.9

5.6

2.1

0.1

4.0

6.46

23.60

34.35

14.26

Under the terms of the employee share purchase plan, the Corporation extended interest-free loans (up to 30 per cent of
an employee’s base salary) to employees below executive level and allowed for payroll deductions over a three-year period
D. Employee Share Purchase Plan
to repay the loan. Executives were not eligible for this program in accordance with the Sarbanes-Oxley legislation. An agent
purchased these common shares on the open market on behalf of employees at prices based on the market price of the
shares as determined on the date of purchase. Employee sales of these shares were handled in the same manner. At Dec.
31, 2017, amounts receivable from employees under the plan totalled less than $1 million (2016 - $1 million).

On Jan. 14, 2016, the Corporation suspended its employee share purchase plan.

27. Employee Future Benefits
The  Corporation  sponsors  registered  pension  plans  in  Canada  and  the  US  covering  substantially  all  employees  of  the
Corporation in these countries and specific named employees working internationally. These plans have defined benefit
A. Description 
and  defined  contribution  options,  and  in  Canada  there  is  an  additional  non-registered  supplemental  plan  for  eligible
employees whose annual earnings exceed the Canadian income tax limit. Except for the Highvale pension plan acquired in
2013, the Canadian and US defined benefit pension plans are closed to new entrants. The US defined benefit pension plan
was frozen effective Dec. 31, 2010, resulting in no future benefits being earned.  The supplemental pension plan was closed
as of Dec. 31, 2015 and a new defined contribution supplemental pension plan commenced for executive members effective
Jan. 1, 2016.  Current executives as of Dec .31, 2015, were grandfathered into the old supplemental plan.

The latest actuarial valuation for accounting purposes of the US pension plan was at Jan. 1, 2017. The latest actuarial
valuation for accounting purposes of the Highvale and Canadian  pension plans was at Dec. 31, 2016. The measurement
date used for all plans to determine the fair value of plan assets and the present value of the defined benefit obligation was
Dec. 31, 2017.

Funding  of  the  registered  pension  plans  complies  with  applicable  regulations  that  require  actuarial  valuations  of  the
pension funds at least once every three years in Canada, or more, depending on funding status, and every year in the US
The supplemental pension plan is solely the obligation of the Corporation. The Corporation is not obligated to fund the
supplemental plan but is obligated to pay benefits under the terms of the plan as they come due. The Corporation posted
a letter of credit in March 2017 for the amount of $77 million to secure the obligations under the supplemental plan.

The Corporation provides other health and dental benefits to the age of 65 for both disabled members and retired members
through its other post-employment benefits plans. The latest actuarial valuations for accounting purposes of the Canadian
and US plans were as at Dec. 31, 2016, and Jan. 1, 2017, respectively. The measurement date used to determine the present
value obligation for both plans was Dec. 31, 2017.

The Corporation provides several defined contribution plans, including an Australian superannuation plan and a US 401
(k) savings plan, that provide for company contributions from 5 per cent to 10 per cent, depending on the plan. Optional
employee contributions are allowed for all the defined contribution plans.

F80 TRANSALTA CORPORATION

F80

TRANSALTA CORPORATION F81

TransAlta Corporation    |    2017  Annual Integrated Report 
Notes to Consolidated Financial Statements

The  costs  recognized  in  net  earnings  during  the  year  on  the  defined  benefit,  defined  contribution,  and  other  post-
employment benefits plans are as follows:
B. Costs Recognized

Year ended Dec. 31, 2017

Current service cost

Administration expenses

Interest cost on defined benefit obligation

Interest on plan assets

Defined benefit expense

Defined contribution expense

Net expense

Year ended Dec. 31, 2016

Current service cost

Administration expenses

Interest cost on defined benefit obligation

Interest on plan assets

Defined benefit expense

Defined contribution expense

Net expense

Year ended Dec. 31, 2015

Current service cost

Administration expenses

Interest cost on defined benefit obligation

Interest on plan assets
Curtailment and amendment gain(1)

Defined benefit expense

Defined contribution expense

Net expense

Registered

Supplemental

Other

Total

7

2

20

(15)

14

11

25

—

—

—

2

3

5

5

—

—

—

1

1

2

2

10

2

24

(15)

21

11

32

Registered

Supplemental

Other

Total

7

2

21

(16)

14

15

29

2

—

3

—

5

—

5

2

—

1

—

3

—

3

11

2

25

(16)

22

15

37

Registered

Supplemental

Other

Total

7

2

21

(16)

—

14

21

35

2

—

3

—

(5)

—

—

—

2

—

1

—

(3)

—

—

—

(1) Relates to the reduction in the number of employees associated with the restructuring initiative described in Note 4(S).

F82 TRANSALTA CORPORATION

11

2

25

(16)

(8)

14

21

35

F81

TransAlta Corporation    |    2017  Annual Integrated Report 
 
Notes to Consolidated Financial Statements

The status of the defined benefit pension and other post-employment benefit plans is as follows:
C. Status of Plans

As at Dec. 31, 2017

Fair value of plan assets

Present value of defined benefit obligation

Funded status - plan deficit

Amount recognized in the consolidated financial statements:

Accrued current liabilities

Other long-term liabilities

Total amount recognized

As at Dec. 31, 2016

Fair value of plan assets

Present value of defined benefit obligation

Funded status - plan deficit

Amount recognized in the consolidated financial statements:

Accrued current liabilities

Other long-term liabilities

Total amount recognized

Registered

Supplemental

Other

416

(561)

(145)

(4)

(141)

(145)

12

(87)

(75)

(6)

(69)

(75)

—

(27)

(27)

(2)

(25)

(27)

Registered

Supplemental

Other

423

(554)

(131)

(15)

(116)

(131)

10

(82)

(72)

(6)

(66)

(72)

—

(27)

(27)

(1)

(26)

(27)

Total

428

(675)

(247)

(12)

(235)

(247)

Total

433

(663)

(230)

(22)

(208)

(230)

The fair value of the plan assets of the defined benefit pension and other post-employment benefit plans is as follows:
D. Plan Assets

As at Dec. 31, 2015

Interest on plan assets

Net return on plan assets

Contributions

Benefits paid

Administration expenses

Effect of translation on US plans

As at Dec. 31, 2016

Interest on plan assets

Net return on plan assets

Contributions

Benefits paid

Administration expenses

Effect of translation on US plans

As at Dec. 31, 2017

Registered

Supplemental

Other

429

16

10

11

(40)

(2)

(1)

423

15

26

6

(51)

(2)

(1)

416

9

—

—

6

(5)

—

—

10

—

—

6

(4)

—

—

12

—

—

—

1

(1)

—

—

—

—

—

—

—

—

—

—

Total

438

16

10

18

(46)

(2)

(1)

433

15

26

12

(55)

(2)

(1)

428

F82

TRANSALTA CORPORATION F83

TransAlta Corporation    |    2017  Annual Integrated Report 
 
The fair value of the Corporation’s defined benefit plan assets by major category is as follows:

Notes to Consolidated Financial Statements

Year ended Dec. 31, 2017

Equity securities

Canadian

US

International

Private

Bonds

AAA

AA

A

BBB

Below BBB

Money market and cash and cash equivalents

Total

Year ended Dec. 31, 2016

Equity securities

Canadian

US

International

Private

Bonds

AAA

AA

A

BBB

Below BBB

Money market and cash and cash equivalents

Total

Level I

Level II

Level III

Total

—

—

—

—

—

—

—

—

1

(1)

—

76

31

118

—

43

71

44

25

5

14

427

1

—

—

—

—

—

—

—

—

—

76

31

118

1

43

71

44

26

5

13

1

428

Level I

Level II

Level III

Total

—

—

—

—

—

—

—

1

—

3

4

76

30

120

—

47

58

55

22

5

14

427

—

—

—

2

—

—

—

—

—

—

2

76

30

120

2

47

58

55

23

5

17

433

Plan assets do not include any common shares of the Corporation at Dec. 31, 2017, and Dec. 31, 2016. The Corporation
charged the registered plan $0.1 million for administrative services provided for the year ended Dec. 31, 2017 (2016 - $0.1
million).

F84 TRANSALTA CORPORATION

F83

TransAlta Corporation    |    2017  Annual Integrated ReportNotes to Consolidated Financial Statements

The present value of the obligation for the defined benefit pension and other post-employment benefit plans is as follows:
E. Defined Benefit Obligation

Present value of defined benefit obligation as at Dec. 31, 2015

Current service cost

Interest cost

Benefits paid

Actuarial gain arising from demographic assumptions

Actuarial loss arising from financial assumptions

Actuarial gain (loss) arising from experience adjustments

Effect of translation on US plans

Present value of defined benefit obligation as at Dec. 31, 2016

Current service cost

Interest cost

Benefits paid

Actuarial loss arising from demographic assumptions

Actuarial loss arising from financial assumptions

Actuarial (gain) loss arising from experience adjustments

Effect of translation on US plans

Present value of defined benefit obligations as at Dec. 31,
2017

Registered

Supplemental

Other

566

7

21

(40)

(1)

2

—

(1)

554

7

20

(51)

4

26

3

(2)

561

80

2

3

(5)

—

—

2

—

82

2

3

(4)

1

3

—

—

87

32

2

1

(1)

(4)

—

(2)

(1)

27

1

1

—

—

—

(1)

(1)

27

Total

678

11

25

(46)

(5)

2

—

(2)

663

10

24

(55)

5

29

2

(3)

675

The weighted average duration of the defined benefit plan obligation as at Dec. 31, 2017 is 14.6.

The expected employer contributions for 2018 for the defined benefit pension and other post-employment benefit plans
are as follows:
F. Contributions

Expected employer contributions

Registered

Supplemental

4

6

Other

2

Total

12

F84

TRANSALTA CORPORATION F85

TransAlta Corporation    |    2017  Annual Integrated Report 
 
Notes to Consolidated Financial Statements

The significant actuarial assumptions used in measuring the Corporation’s defined benefit obligation for the defined benefit
pension and other post-employment benefit plans are as follows:
G. Assumptions

(per cent)

Accrued benefit obligation

Discount rate

Rate of compensation increase

Assumed health care cost trend rate

Health care cost escalation

Dental care cost escalation

Benefit cost for the year

Discount rate

Rate of compensation increase

Assumed health care cost trend rate

Health care cost escalation

Dental care cost escalation

Provincial health care premium escalation

As at Dec. 31, 2017

As at Dec. 31, 2016

Registered Supplemental Other

Registered

Supplemental Other

3.3

2.9

—

—

3.7

2.6

—

—

—

3.3

3.0

3.4

—

—

—

7.8(1)

4.0

3.6

3.0

3.7

—

—

—

—

7.9(2)

4.0

—

3.7

2.9

—

—

3.8

3.0

—

—

—

3.6

3.0

3.7

—

— 7.9(3)

—

4.0

3.8

3.0

3.8

—

— 7.8(4)

—

—

4.0

5.0

(1) Post- and Pre 65 rates: decreasing gradually to 4.5% by 2027 and remaining at that level thereafter for the U.S. and decreasing gradually by 0.3% per year to 4.5%
in 2027 for Canada.
(2) Post- and Pre 65 rates: decreasing gradually to 4.5% by 2026 and remaining at that level thereafter for the U.S. and decreasing gradually by 0.30% per year to 5%
in 2024 for Canada.
(3) Post- and Pre 65 rates: decreasing gradually to 4.5% by 2026 and remaining at that level thereafter for the U.S. and decreasing gradually by 0.30% per year to 5%
in 2024 for Canada.
(4) Post- and Pre 65 rates: decreasing gradually to 5% by 2024 and remaining at that level thereafter for the U.S. and decreasing gradually by 0.35% per year to 5% in
2024 for Canada.

The following table outlines the estimated increase in the net defined benefit obligation assuming certain changes in key
assumptions:
H. Sensitivity Analysis

Year ended Dec. 31, 2017

1% decrease in the discount rate

1% increase in the salary scale

1% increase in the health care cost trend rate

10% improvement in mortality rates

Canadian plans

US plans

Registered Supplemental      Other

Pension Other

79

10

—

20

12

1

—

2

3

2

—

—

—

—

3

1

1

—

—

—

F86 TRANSALTA CORPORATION

F85

TransAlta Corporation    |    2017  Annual Integrated Report 
 
Notes to Consolidated Financial Statements

Joint arrangements at Dec. 31, 2017, included the following:
28. Joint Arrangements

Joint operations

Segment

Ownership
 (per cent) Description

Sheerness

Genesee Unit 3

Keephills Unit 3

Goldfields Power

Coal

Coal

Coal

Gas

Fort Saskatchewan Gas

Fortescue River
Gas Pipeline

McBride Lake

Soderglen

Pingston

Gas

Wind

Wind

Hydro

50

50

50

50

60

43

50

50

50

Coal-fired plant in Alberta, of which TA Cogen has a 50 per cent interest, operated by
ATCO Power

Coal-fired plant in Alberta operated by Capital Power Corporation

Coal-fired plant in Alberta operated by TransAlta

Gas-fired plant in Australia operated by TransAlta

Cogeneration plant in Alberta, of which TA Cogen has a 60 per cent interest, operated
by TransAlta

Natural gas pipeline in Western Australia, operated by DBP Development Group

Wind generation facility in Alberta operated by TransAlta

Wind generation facility in Alberta operated by TransAlta

Hydro facility in British Columbia operated by TransAlta

29. Cash Flow Information
Year ended Dec. 31
A. Change in Non-Cash Operating Working Capital
(Use) source:

Accounts receivable

Prepaid expenses

Income taxes receivable

Inventory

Accounts payable, accrued liabilities, and provisions

Income taxes payable

Change in non-cash operating working capital

B. Changes in Liabilities from Financing Activities 

Balance 
Dec. 31,
2016

Cash
flows

New
leases

Long-term debt and finance lease 
  obligations

Dividends payable (common and 
  preferred)

Total liabilities from financing
activities

4,361

(545)

54

(86)

4,415

(631)

14

—

14

2017

2016

2015

(228)

(75)

8

(7)

186

2

(114)

(23)

5

(4)

11

81

3

73

(77)

(3)

1

(9)

(152)

(2)

(242)

Dividends
declared

Foreign exchange

impact Other

—

64

64

(115)

—

(115)

(8)

2

(6)

Balance 
Dec. 31,
2017

3,707

34

3,741

F86

TRANSALTA CORPORATION F87

TransAlta Corporation    |    2017  Annual Integrated Report 
TransAlta’s capital is comprised of the following:
30. Capital

As at Dec. 31
Long-term debt(1)

Equity

Common shares

Preferred shares

Contributed surplus

Deficit

Accumulated other comprehensive income

Non-controlling interests

Less: available cash and cash equivalents(2)
Less: fair value asset of hedging instruments on long-term debt(3)

Total capital

Notes to Consolidated Financial Statements

2017

3,707

3,094

942

10

(1,209)

489

1,059

(314)

(30)

7,748

2016

4,361

3,094

942

9

(933)

399

1,152

(305)

(163)

8,556

Increase/
(decrease)

(654)

—

—

1

(276)

90

(93)

(9)

133

(808)

(1) Includes finance lease obligations, amounts outstanding under credit facilities, tax equity liability, and current portion of long-term debt.
(2) The Corporation includes available cash and cash equivalents as a reduction in the calculation of capital, as capital is managed internally and evaluated by
management using a net debt position.  In this regard, these funds may be available, and used to facilitate repayment of debt.
(3) The Corporation includes the fair value of economic and designated hedging instruments on debt in an asset, or liability, position as a reduction, or increase, in the
calculation of capital, as the carrying value of the related debt has either increased, or decreased, due to changes in foreign exchange rates.

In 2016 and 2017, the Corporation focused on raising non-recourse debt to fund upcoming corporate debt maturities. The
Corporation’s overall capital management strategy and its objectives in managing capital have remained unchanged from
Dec. 31, 2016, and are as follows:

The Corporation operates in a long-cycle and capital-intensive commodity business, and it is therefore a priority to maintain
an investment grade credit rating as it allows the Corporation to access capital markets at reasonable interest rates. Key
A. Maintain an Investment Grade Credit Rating
rating  agencies  assess  TransAlta’s  credit  rating  using  a  variety  of  methodologies,  including  financial  ratios.  These
methodologies and ratios are not publicly disclosed. TransAlta’s management has developed its own definitions of metrics,
ratios, and targets to manage the Corporation’s capital. These metrics and ratios are not defined under IFRS, and may not
be comparable to those used by other entities or by rating agencies.

The Corporation has an investment grade credit rating from Standard & Poor's (negative outlook), DBRS (stable outlook)
and Fitch Ratings (stable outlook). In December 2015, Moody’s downgraded the Corporation below investment grade to
Ba1 with a stable outlook.  During 2017, Fitch Ratings reaffirmed the Corporation’s Unsecured Debt rating and Issuer
Rating of BBB- and changed their outlook from negative to stable, DBRS changed the Corporation’s Unsecured Debt rating
and Medium-Term Notes rating from BBB to BBB (low), the Preferred Shares rating from Pfd-3 to Pfd-3 (low), and Issuer
Rating  from  BBB  to  BBB  (low)  (with  outlook  changed  to  stable  from  negative),  and  Standard  &  Poor’s  reaffirmed  the
Corporation’s Unsecured Debt rating and Issuer Rating of BBB-, but changed the outlook from stable to negative. The
Corporation is focused on strengthening its financial position and cash flow coverage ratios to achieve stable investment
grade  credit  ratings.  Strengthening  the  Corporation’s  financial  position  allows  its  commercial  team  to  contract  the
Corporation’s  portfolio  with  a  variety  of  counterparties  on  terms  and  prices  that  are  favourable  to  the  Corporation’s
financial results and provides the Corporation with better access to capital markets through commodity and credit cycles.

F88 TRANSALTA CORPORATION

F87

TransAlta Corporation    |    2017  Annual Integrated Report 
Notes to Consolidated Financial Statements

As at Dec. 31

Comparable funds from operations to adjusted interest coverage (times)

Adjusted comparable funds from operations to adjusted net debt (%)

Adjusted net debt to comparable earnings before interest,

taxes, depreciation, and amortization (times)

2017

4.3

20.4

3.6

2016

3.9

16.3

Target

4 to 5

20 to 25

3.8

3.0 to 3.5

Comparable Funds from Operations (“ FFO” ) before Interest to Adjusted Interest Coverage is calculated as comparable
FFO plus interest on debt (net of capitalized interest) divided by interest on debt plus 50 per cent of dividends paid on
preferred shares. Comparable FFO is calculated as cash flow from operating activities before changes in working capital
and is adjusted for transactions and amounts that the Corporation believes are not representative of ongoing cash flows
from operations. Comparable FFO to adjusted interest coverage in 2017 improved compared with 2016. The Corporation’s
goal is to maintain this ratio in a range of four to five times.

Adjusted Comparable FFO to Adjusted Net Debt is calculated as comparable FFO less 50 per cent of dividends paid on
preferred shares divided by net debt (current and long-term debt plus 50 per cent of outstanding preferred shares less
available cash and cash equivalents and including fair value assets of hedging instruments on debt). Adjusted comparable
FFO to adjusted net debt increased in 2017 compared to 2016 due to the increase in comparable FFO, and lower debt due
to repayments. The Corporation’s goal is to maintain this ratio in a range of 20 to 25 per cent.

Adjusted  Net  Debt  to  Comparable  Earnings  before  Interest,  Taxes,  Depreciation,  and  Amortization  (“ EBITDA” )  is
calculated as net debt divided by comparable EBITDA. Comparable EBITDA is calculated as earnings before interest, taxes,
depreciation,  and  amortization  and  is  adjusted  for  transactions  and  amounts  that  the  Corporation  believes  are  not
representative of ongoing business operations. Adjusted net debt to comparable EBITDA in 2017 improved compared to
2016 due to the lower debt balance due to repayments. The Corporation’s goal is to maintain this ratio in a range of 3.0 to
3.5 times.

At times, the credit ratios may be outside of the specified target ranges while the Corporation realigns its capital structure.
During 2017, the Corporation continued to strengthen its financial position and reduce debt; using proceeds from the
dropdown of the Canadian Assets to pay out the credit facility balance. In 2016, the Corporation reduced its dividend to
$0.16 per common share on an annualized basis from $0.72 per common share.

Management routinely monitors forecasted net earnings, cash flows, capital expenditures, and scheduled repayment of
debt with a goal of meeting the above ratio targets and to meet dividend and PP&E expenditure requirements.

F88

TRANSALTA CORPORATION F89

TransAlta Corporation    |    2017  Annual Integrated ReportNotes to Consolidated Financial Statements

B. Ensure Sufficient Cash and Credit is Available to Fund Operations, Pay Dividends, Distribute
Payments to Subsidiaries’ Non-Controlling Interests, Invest in Property, Plant, and Equipment, and
For the years ended Dec. 31, 2017 and 2016, cash inflows and outflows are summarized below. The Corporation manages
Make Acquisitions
variations in working capital using existing liquidity under credit facilities.

Year ended Dec. 31

Cash flow from operating activities

Change in non-cash working capital

Cash flow from operations before changes in working capital

Dividends paid on common shares

Dividends paid on preferred shares

Distributions paid to subsidiaries’ non-controlling interests
Property, plant, and equipment expenditures(1)

Inflow

(1) Includes growth capital associated with the South Hedland Power Station.

2017

2016

Increase
(decrease)

626

114

740

(46)

(40)

(172)

(338)

144

744

(73)

671

(69)

(42)

(151)

(358)

51

(118)

187

69

23

2

(21)

20

223

TransAlta maintains sufficient cash balances and committed credit facilities to fund periodic net cash outflows related to
its business. At Dec. 31, 2017, $1.4 billion (2016 - $1.4 billion) of the Corporation’s available credit facilities were not drawn.

Periodically, TransAlta accesses capital markets, as required, to help fund some of these periodic net cash outflows, to
maintain its available liquidity, and to maintain its capital structure and credit metrics within targeted ranges. TransAlta is
focused on replacing additional maturing recourse debt with debt secured by contracted cash flows.

F90 TRANSALTA CORPORATION

F89

TransAlta Corporation    |    2017  Annual Integrated ReportNotes to Consolidated Financial Statements

Details of the Corporation’s principal operating subsidiaries at Dec. 31, 2017 are as follows:
31. Related-Party Transactions

Subsidiary

TransAlta Generation Partnership

TransAlta Cogeneration, L.P.

Country

Canada

Canada

TransAlta Centralia Generation, LLC

US

TransAlta Energy Marketing Corp.

Canada

TransAlta Energy Marketing (U.S.), Inc.

US

TransAlta Energy (Australia), Pty Ltd.

Australia

TransAlta Renewables Inc.

Canada

Ownership
(per cent)

Principal activity

100

50.01

100

100

100

100

64.0

Generation and sale of electricity

Generation and sale of electricity

Generation and sale of electricity

Energy marketing

Energy marketing

Generation and sale of electricity

Generation and sale of electricity

Transactions between the Corporation and its subsidiaries have been eliminated on consolidation and are not disclosed.

Transactions with Key Management Personnel 
TransAlta’s key management personnel include the President and CEO and members of the senior management team that
report directly to the President and CEO, and the members of the Board.

Key management personnel compensation is as follows:

Year ended Dec. 31

Total compensation

Comprised of:

  Short-term employee benefits

  Post-employment benefits

  Termination benefits

  Share-based payments

2017

2016

2015

24

14

2

—

8

20

8

2

—

10

9

8

2

1

(2)

F90

TRANSALTA CORPORATION F91

TransAlta Corporation    |    2017  Annual Integrated ReportNotes to Consolidated Financial Statements

In  addition  to  commitments  disclosed  elsewhere  in  the  financial  statements,  the  Corporation  has  other  contractual
32. Commitments and Contingencies
commitments,  either  directly  or  through  its  interests  in  joint  operations.  Approximate  future  payments  under  these
agreements are as follows:

Natural gas, transportation, and 
  other purchase contracts

Transmission

Coal supply and mining
agreements

Long-term service agreements

Non-cancellable operating
leases(1)

Growth

TransAlta Energy Transition Bill

Total

2018

2019

2020

2021

2022

2023 and
thereafter

Total

48

9

155

108

9

27

6

362

7

6

159

50

9

—

6

5

6

161

41

9

—

6

237

228

5

3

23

31

9

—

6

77

4

—

14

15

9

—

6

48

29

—

96

35

111

—

6

277

98

24

608

280

156

27

36

1,229

(1) Includes amounts under certain evergreen contracts on the assumption of the Corporation’s continued operations.

Several of the Corporation’s plants have fixed price natural gas purchase and related transportation contracts in place.
Other purchase contracts relate to commitments for goods and services.
A. Natural Gas, Transportation, and Other Purchase Contracts

The Corporation has several agreements to purchase transmission network capacity in the Pacific Northwest. Provided
certain conditions for delivering the service are met, the Corporation is committed to the transmission at the supplier’s
B. Transmission
tariff rate whether it is awarded immediately or delivered in the future after additional facilities are constructed.

Various coal supply and associated rail transport contracts are in place to provide coal for use in production at the Centralia
coal plant. The coal supply agreements allow TransAlta to take delivery of coal at fixed volumes with dates extending to
C. Coal Supply and Mining Agreements
2020.

Commitments  related  to  mining  agreements  include  the  Corporation’s  share  of  commitments  for  mining  agreements
related to its Sheerness and Genesee Unit 3 joint operations, and certain other mining royalty agreements. Some of these
commitments have been  reduced, due to the cessation of coal-fired emissions from the Genesee 3 and Sheerness coal-
fired plants on or before Dec. 31, 2030.

TransAlta has various service agreements in place, primarily for inspections and repairs and maintenance that may be
required on natural gas facilities, coal facilities, and turbines at various wind facilities.
D. Long-Term Service Agreements

TransAlta has operating leases in place for buildings, vehicles, and various types of equipment and commitments for water
rights and transmission tower right of ways.
E. Non-Cancellable Operating Leases

During the year ended Dec. 31, 2017, $7 million (2016 - $9 million, 2015 - $9 million) was recognized as an expense in
respect of these operating leases. Sublease payments received during 2017 and 2016 were less than $1 million (2015 -
less than $1 million). No contingent rental payments were made in respect of these operating leases.

F92 TRANSALTA CORPORATION

F91

TransAlta Corporation    |    2017  Annual Integrated Report 
 
 
 
 
Notes to Consolidated Financial Statements

Commitments for growth relate to the construction of the Kent Hills 3 wind project.
F. Growth

On July 30, 2015, the Corporation announced that it would formalize its commitment to invest US$55 million over the
remaining 9 year life of the Centralia coal plant to support energy efficiency, economic and community development, and
G. TransAlta Energy Transition Bill Commitments
education and retraining initiatives in Washington State by waiving its right to terminate the commitment on the basis of
the level of contract sales of the Centralia plant. As of Dec. 31, 2017, the Corporation has funded approximately US$28
million of the commitment, which is recognized in other assets in the Consolidated Statements of Financial Position.

A significant portion of the Corporation’s electricity and thermal production are subject to PPAs and long-term contracts.
The majority of these contracts include terms and conditions customary to the industry in which the Corporation operates.
H. Other
The nature of commitments related to these contracts includes: electricity and thermal capacity, availability, and production
targets; reliability and other plant-specific performance measures; specified payments for deliveries during peak and off-
peak time periods; specified prices per MWh; risk sharing of fuel costs; and retention of heat rate risk.

TransAlta is occasionally named as a party in various claims and legal and regulatory proceedings that arise during the
normal course of its business. TransAlta reviews each of these claims, including the nature of the claim, the amount in
I. Contingencies
dispute or claimed, and the availability of insurance coverage. There can be no assurance that any particular claim will be
resolved in the Corporation’s favour or that such claims may not have a material adverse effect on TransAlta. Inquiries from
regulatory bodies may also arise in the normal course of business, to which the Corporation responds as required.

I. Line Loss Rule Proceeding 
The Corporation has been participating in a line loss rule proceeding (the “LLRP”) before the AUC. The AUC determined
that it has the ability to retroactively adjust line loss charges going back to 2006 and directed the Alberta Electric System
Operator to, among other things, perform such retroactive calculations. The various decisions by the AUC are, however,
subject to appeal and challenge.  A recent decision by the AUC determined the methodology to be used retroactively and
it is now possible to estimate the total retroactive potential exposure faced by the Corporation for its non-PPA MWs.  The
estimate of the maximum exposure is $15 million; however, if the Corporation and others are successful on the appeal of
legal  and  jurisdictional  questions  regarding  retroactivity,  the  amount  owing  will  be  nil. The  Corporation  has  therefore
recorded a provision of $7.5 million.   

II. FMG Disputes
The Corporation is currently engaged in litigation with FMG as a result of their purported termination of the South Hedland
PPA.  In  addition,  FMG  withheld  approximately  AUD$58.2  million,  including  AUD$43  million  in  tax  applicable  to  the
repurchase  of  the  Solomon  Power  Station.   TransAlta  is  seeking  payment  of  all  withheld  amounts,  and  has  currently
commenced proceedings to recover approximately AUD$54.1 million by filing and serving FMG with a Writ and Statement
of Claim on Nov. 17, 2017, and also applied for summary judgment for this amount.  The hearing is scheduled for March
23, 2018.  

F92

TRANSALTA CORPORATION F93

TransAlta Corporation    |    2017  Annual Integrated Report 
 
 
 
Notes to Consolidated Financial Statements

33. Segment Disclosures
The Corporation has eight reportable segments as described in Note 1. 
A. Description of Reportable Segments

I. Earnings Information
B. Reported Segment Earnings (Loss) and Segment Assets

Year ended Dec 31, 2017

Revenues

Fuel and purchased power

Gross margin

Operations, maintenance, and 
  administration

Depreciation and amortization

Asset impairment charge

Taxes, other than income taxes

Net other operating income

Operating income (loss)

Finance lease income

Net interest expense

Foreign exchange loss

Gain on sale of assets and
other

Losses before income taxes

Canadian
Coal

US
Coal

Canadian
Gas

Australian
Gas

Wind and

Energy

Solar Hydro

Marketing Corporate

Total

999

585

414

192

317

20

13

(40)

(88)

—

435

293

142

51

73

—

—

4

14

—

261

101

160

50

38

—

1

(9)

80

11

135

14

121

31

37

—

—

—

53

43

287

17

270

48

111

—

—

8

103

—

121

6

115

37

31

—

—

3

44

—

69

—

69

24

2

—

—

—

43

—

—

—

—

84

26

—

—

1

2,307

1,016

1,291

517

635

20

30

(49)

(111)

138

—

54

(247)

(1)

2

(54)

Year ended Dec 31, 2016

Canadian
Coal

US
Coal

Canadian
Gas

Australian
Gas

Wind and

Energy

Solar Hydro

Marketing Corporate

Total

Revenues

1,048

Fuel and purchased power

Gross margin

Operations, maintenance, and 
  administration

Depreciation and amortization

Asset impairment charge

Restructuring provision

Taxes, other than income taxes

Net other operating (income)
loss

Operating income (loss)

Finance lease income

Net interest expense

Foreign exchange loss

Gain on sale of assets

Earnings before income taxes

F94 TRANSALTA CORPORATION

354

281

73

54

61

—

—

4

—

451

597

178

242

—

—

13

(2)

166

(46)

—

—

402

185

217

54

100

—

—

1

(191)

253

14

119

20

99

25

17

—

—

1

—

56

52

272

18

254

52

119

28

—

8

(1)

48

—

126

8

118

33

33

—

—

3

—

49

—

76

—

76

24

3

—

—

—

—

49

—

— 2,397

—

963

— 1,434

69

26

—

1

1

489

601

28

1

31

— (194)

(97)

478

—

66

(229)

(5)

4

314

F93

TransAlta Corporation    |    2017  Annual Integrated Report 
 
 
 
 
 
 
 
 
Notes to Consolidated Financial Statements

Year ended Dec 31, 2015

Revenues

Fuel and purchased power

Gross margin

Operations, maintenance, and 
  administration

Depreciation and amortization

Asset impairment reversals

Restructuring provision

Taxes, other than income taxes

Net other operating (income) 
  losses

Operating income (loss)

Finance lease income

Gain on sale of assets

Net interest expense

Foreign exchange gain

Earnings before income taxes

Canadian
Coal

US
Coal

Canadian
Gas

Australian
Gas

Wind Hydro

Marketing Corporate

Total

Energy

912

441

471

194

237

—

11

12

(7)

24

—

—

372

316

56

50

63

(2)

1

3

—

(59)

—

—

454

204

250

67

75

—

1

3

—

104

9

262

114

20

94

21

20

—

—

—

—

53

49

—

250

19

231

48

99

—

—

7

—

77

—

—

116

8

108

29

25

—

—

3

(24)

75

—

—

49

—

49

12

1

—

3

—

56

(23)

—

—

— 2,267

— 1,008

— 1,259

71

25

—

6

1

—

492

545

(2)

22

29

25

(103)

148

—

—

58

262

(251)

4

221

Included in revenues of the Wind and Solar Segment for the year ended Dec. 31, 2017 is $18 million (2016 -$19 million,
2015 - $20 million) of incentives received under a Government of Canada program in respect of power generation from
qualifying wind projects.

Total rental income, including contingent rent related to certain PPAs and other long-term contracts that meet the criteria
of operating leases, is included in revenues, and was $247 million for the year ended Dec. 31, 2017 (2016 - $221 million,
2015 - $230 million).

II. Selected Consolidated Statements of Financial Position Information

As at Dec 31, 2017

Goodwill

PP&E

Intangible assets

As at Dec 31, 2016

Goodwill

PP&E

 Intangibles

Canadian
Coal

US
Coal

Canadian
Gas

Australian
Gas

Wind and

Energy

Solar Hydro

Marketing Corporate

Total

—

—

2,902

370

91

7

—

416

3

—

606

42

174

1,764

149

259

497

3

30

1

13

—

463

22 6,578

56

364

Canadian
Coal

US
Coal

Canadian
Gas

Australian
Gas

Wind and

Energy

Solar Hydro

Marketing Corporate

Total

—

—

3,069

428

93

7

—

414

4

—

527

12

175

1,856

163

259

503

3

30

2

15

—

464

25 6,824

58

355

F94

TRANSALTA CORPORATION F95

TransAlta Corporation    |    2017  Annual Integrated Report 
 
 
 
 
 
 
 
Notes to Consolidated Financial Statements

III. Selected Consolidated Statements of Cash Flows Information
Additions to non-current assets are as follows:

Year ended Dec 31, 2017

Additions to non-current
assets:

PP&E

Intangible assets

Year ended Dec 31, 2016

Additions to non-current
assets:

 PP&E

 Intangibles

Year ended Dec 31, 2015

Additions to non-current
assets:

 PP&E

 Intangibles

Canadian
Coal

US
Coal

Canadian
Gas

Australian
Gas

Wind and

Energy

Solar Hydro

Marketing Corporate

Total

116

5

35

1

31

—

114

29

20

—

16

—

—

—

6

16

338

51

Canadian
Coal

US
Coal

Canadian
Gas

Australian
Gas

Wind and

Energy

Solar Hydro

Marketing Corporate

Total

159

3

15

1

11

1

107

—

16

—

43

—

—

—

7

16

358

21

Canadian
Coal

US
Coal

Canadian
Gas

Australian
Gas

Wind and

Energy

Solar Hydro

Marketing Corporate

Total

179

6

13

—

19

—

204

—

13

—

43

—

1

3

4

17

476

26

IV. Depreciation and Amortization on the Consolidated Statements of Cash Flows 
The reconciliation between depreciation and amortization reported on the Consolidated Statements of Earnings (Loss)
and the Consolidated Statements of Cash Flows is presented below:

Year ended Dec. 31

2017

2016

2015

Depreciation and amortization expense on the Consolidated Statements of 
  Earnings (Loss)

Depreciation included in fuel and purchased power (Note 5)

Loss on disposal of property, plant, and equipment

Depreciation and amortization on the Consolidated Statements of Cash Flows

I. Revenues
C. Geographic Information

Year ended Dec. 31

Canada

US

Australia

Total revenue

F96 TRANSALTA CORPORATION

635

73

—

708

2017

1,663

509

135

2,307

601

63

—

664

2016

1,828

450

119

2,397

545

59

1

605

2015

1,705

448

114

2,267

F95

TransAlta Corporation    |    2017  Annual Integrated ReportNotes to Consolidated Financial Statements

II. Non-Current Assets

As at Dec. 31

Canada

US

Australia

Total

Property, plant, and
equipment

2017

5,353

619

606

6,578

2016

5,583

714

527

6,824

Intangible assets

Other assets

Goodwill

2017

297

25

42

364

2016

315

28

12

355

2017

105

43

89

237

2016

184

42

16

242

2017

417

46

—

463

2016

417

47

—

464

During the year ended Dec. 31, 2017, sales to one customer represented 28 per cent, of the Corporation’s total revenue
(2016 - two customers representing 25 per cent and 16 per cent, respectively).
D. Significant Customer

34. Subsequent Events
On March 1, 2018, the Corporation announced that it intends to seek Toronto Stock Exchange ("TSX") acceptance of a
normal course issuer bid ("NCIB"). The Board has authorized the repurchases of up to 14,000,000 of its common shares,
A. Normal Course Issuer Bid
representing approximately five per cent of TransAlta's public float. Purchases under the NCIB are expected to be made
through open market transactions on the TSX and any alternative Canadian trading platforms, based on the prevailing
market price. Any Common Shares purchased under the NCIB will be cancelled. 

On Feb. 2, 2018, the Corporation announced it called for the redemption of its outstanding US$500 million 6.65 per cent
senior notes maturing May 15, 2018 (the “Senior Notes”). The Senior Notes will be redeemed on March 15, 2018, at a price
B. Early Redemption of Senior Notes Due 2018
equal to the greater of: i) 100 per cent of the principal amount of the Senior Notes and ii) the sum of the present values of
the remaining scheduled payments of principal and interest thereon discounted to the redemption date on a semi-annual
basis at the treasury rate plus 45 basis points, plus in each case, accrued interest thereon to the date of redemption.

On Feb. 20, 2018, TransAlta Renewables announced it entered into an arrangement to acquire two construction-ready
projects in the Northeastern United States. 
C. Acquisition of Two US Wind Projects

The wind development projects consist of: i) a 90 MW project located in Pennsylvania that has a 15-year PPA and ii) a 29
MW project located in New Hampshire with two 20-year PPAs.  All three counterparties have Standard & Poor's credit
ratings of A+ or better.

The total cost of the two projects is estimated to be US$240 million, of which approximately 70% will be funded in 2018
and the remainder in 2019.  The commercial operation date for both projects is expected during the second half of 2019.

TransAlta Renewables will fund the acquisition and construction costs using its existing liquidity and tax equity.

F96

TRANSALTA CORPORATION F97

TransAlta Corporation    |    2017  Annual Integrated Report 
Exhibit 1

(Unaudited)

Exhibit 1 
The information set out below is referred to as “unaudited” as a means of clarifying that it is not covered by the audit opinion
of  the  independent  registered  public  accounting  firm  that  has  audited  and  reported  on  the  Consolidated  Financial
Statements.

To the Financial Statements of TransAlta Corporation

EARNINGS COVERAGE RATIO

The following selected financial ratio is calculated for the year ended Dec. 31, 2017:

Earnings coverage on long-term debt supporting the Corporation’s Shelf Prospectus

0.57 times

Earnings coverage on long-term debt on a net earnings basis is equal to net earnings before interest expense and income taxes, divided by interest expense including
capitalized interest.

TRANSALTA CORPORATION F98

F97

TransAlta Corporation    |    2017  Annual Integrated ReportEleven-Year Financial and Statistical Summary

(in millions of Canadian dollars, except where noted)

Year ended Dec. 31
Financial Summary
Statement of Earnings
Revenues
Operating income
Net earnings (loss) attributable to common shareholders
Statement of Financial Position
Total assets
Current portion of long-term debt, net of cash and cash equivalents
Credit facilities, long-term debt and finance lease obligations
Non-controlling interests
Preferred shares
Equity attributable to common shareholders
Fair value (asset) liability of hedging instruments on debt
Total invested capital(1)
Cash Flows
Cash flow from operating activities
Cash flow from (used in) investing activities
Common Share Information (per share)
Net earnings (loss) 
Comparable earnings(2)
Dividends paid on common shares
Book value per common share (at year-end)
Market price:
High
Low
Close (Toronto Stock Exchange at Dec. 31)

Ratios (percentage except where noted)
Adjusted net debt to invested capital
Adjusted net debt to invested capital excluding non-recourse debt
Adjusted net debt to comparable EBITDA (times)(2)(5)
Return on equity attributable to common shareholders
Comparable return on equity attributable to common shareholders(2)
Return on capital employed
Comparable return on capital employed(2)
Earnings coverage (times)
Dividend payout ratio based on comparable funds from operations(2)(5)
Comparable EBITDA (in millions of Canadian dollars)(2)(5)
Dividend coverage (times)(2)(5)
Dividend yield
Adjusted comparable funds from operations to adjusted net debt(2)(5)
Comparable funds from operations before interest to adjusted interest coverage (times)(2)(5)
Weighted average common shares for the year (in millions)
Common shares outstanding at Dec. 31 (in millions)
Statistical Summary
Number of employees
Generating capacity (MW)(3)
Coal (Canadian and US)
Gas(4)
Renewables (wind, solar and hydro)
Equity investments
Total generating capacity
Total generation production (GWh)

2017

2016

2015

 2,307 
 138 
 (190)

 10,304 
 433 
 2,960 
 1,059 
 942 
 2,384 
 (30)
 7,748 

 740 
 87 

 (0.66)
 n/a 
 0.16 
 8.28 

 8.50 
 6.88 
 7.45 

49.5 
41.8 
3.6 
(10.0)
 n/a 
2.1 
 n/a 
0.6 
4.3 
 1,062 
14.1 
2.1 
20.4 
4.3 
 288 
 288 

 2,397 
 478 
 117 

 10,996 
 334 
 3,722 
 1,152 
 942 
 2,569 
 (163)
 8,556 

 744 
 (327)

 0.41 
 0.13 
 0.30 
 8.92 

 7.54 
 3.76 
 7.43 

51.0 
44.2 
3.8 
5.4 
1.7 
5.3 
4.4 
1.7 
8.1 
 1,144 
11.1 
4.0 
16.3 
3.9 
 288 
 288 

 2,267 
 148 
 (24)

 10,947 
 33 
 4,408 
 1,029 
 942 
 2,419 
 (190)
 8,641 

 432 
 (573)

 (0.09)
 (0.17)
 0.72 
 8.52 

 12.34 
 4.13 
 4.91 

54.6 
50.2 
5.4 
(1.2)
(2.3)
4.6 
3.0 
1.5 
30.0 
 867 
3.3 
14.7 
14.3 
3.7 
 280 
 284 

 2,228 

 2,341 

 2,380 

 5,131 
 1,403 
 2,289 
 – 
 8,823 
 36,900 

 5,131 
 1,482 
 2,334 
 – 
 8,947 
 38,157 

 5,126 
 1,405 
 2,350 
 – 
 8,881 
 40,673 

Financial data presented is based on IFRS. Financial data for 2009 and prior is based on Canadian 
GAAP.  Prior  year  figures  that  appear  within  the  MD&A  have  been  restated  to  conform  with  the 
current year’s presentation. All other prior year figures have not been restated.
(1) Total invested capital for 2014 to 2009 has been revised to align with the 2015 calculation methodology.
(2) These ratios were calculated using non-IFRS measures. Periods for which the non-IFRS measure was not 
previously disclosed have not been calculated. For 2017, comparable earnings measures are no longer 
being calculated or reported on.

(3) 2017, 2016, 2015, 2014, 2013 and 2012 are gross capacity, which reflects the basis of underlying results.  

Prior year figures are as previously reported.

(4) Includes finance leases.
(5) 2016 and 2015 revised due to revisions to EBITDA or FFO measures in MD&A.

Ratio Formulas
Adjusted net debt to invested capital = long-term debt and finance lease obligations including current 
portion and fair value (asset) liability of hedging instruments on debt + 50 per cent issued preferred 
shares - cash and cash equivalents / long-term debt and finance lease obligations including current 
portion + non-controlling interests + equity attributable to shareholders - 50 per cent issued preferred 
shares - cash and cash equivalents

Adjusted net debt to comparable EBITDA = long-term debt and finance lease obligations including 
current  portion  and  fair  value  (asset)  liability  of  hedging  instruments  on  debt  -  cash  and  cash 
equivalents + 50 per cent issued preferred shares / comparable EBITDA

Return  on  equity  attributable  to  common  shareholders  =  net  earnings  attributable  to  common 
shareholders excluding gain on discontinued operations or earnings on a comparable basis / equity 
attributable to common shareholders excluding Accumulated Other Comprehensive Income (“AOCI”)

200

TransAlta Corporation    |    2017  Annual Integrated ReportEleven-Year Financial and Statistical Summary

2014

2013

2012

2011

2010

2009

2008

2007

 2,623 
 442 
 141 

 9,833 
 708 
 3,305 
 594 
 942 
 2,342 
 (96)
 7,795 

 796 
 (292)

 0.52 
 0.25 
 0.83 
 8.52 

 14.94 
 9.81 
 10.52 

56.3 
54.1 
4.2 
6.3 
3.0 
5.8 
5.1 
1.7 
26.4 
 1,036 
5.7 
7.9 
16.9 
3.8 
 273 
 275 

 2,292 
 195 
 (71)

 9,624 
 175 
 4,130 
 517 
 781 
 2,125 
 (16)
 7,712 

 765 
 (703)

 (0.27)
 0.31 
 1.16 
 7.92 

 16.86 
 12.91 
 13.48 

60.7 
58.7 
4.6 
(3.2)
3.7 
2.8 
5.2 
0.8 
43.1 
 1,023 
6.3 
8.6 
15.2 
3.7 
 264 
 268 

 2,210 
 (214)
 (615)

 9,503 
 582 
 3,610 
 330 
 – 
 3,018 
 50 
 7,590 

 520 
 (1,048)

 (2.62)
 0.50 
 1.16 
 8.78 

 21.37 
 14.11 
 15.12 

61.0 
59.0 
4.6 
(25.9)
4.9 
(3.1)
5.3 
(1.0)
25.1 
 1,015 
4.7 
7.7 
16.7 
3.3 
 235 
 255 

 2,618 
 645 
 290 

 9,780 
 284 
 3,721 
 358 
 – 
 3,274 
 32 
 7,669 

 690 
 (608)

 1.31 
 1.05 
 1.16 
 12.08 

 23.24 
 19.45 
 21.02 

52.5 
 60.0 
 3.8 
 10.6 
 8.4 
 8.3 
 7.0 
 2.7 
 24.0 
 1,044 
 3.5 
 5.5 
 20.1 
 4.4 
 222 
 224 

 2,673 
 487 
 255 

 9,635 
 202 
 3,823 
 431 
 – 
 3,120 
 41 
 7,617 

 838 
 (765)

 1.16 
 0.97 
 1.16 
 12.85 

 23.98 
 19.61 
 21.15 

 53.1 
 50.7 
 – 
 9.6 
 8.0 
 6.6 
 6.0 
 2.2 
 39.6 
 955 
 4.0 
 5.5 
 19.6 
 4.6 
 219 
 220 

 2,770 
 378 
 181 

 9,762 
 (51)
 4,411 
 478 
 – 
 2,929 
 16 
 7,783 

 580 
 (1,598)

 0.90 
 0.90 
 1.16 
 13.41 

 25.30 
 18.11 
 23.48 

 56.1 
 52.6 
 – 
 6.9 
 6.9 
 5.7 
 5.8 
 1.9 
 –  
 888 
 2.6 
 4.9 
 20.5 
 4.9 
 201 
 218 

 3,110 
 533 
 235 

 7,815 
 194 
 2,564 
 469 
 – 
 2,510 
 – 
 5,737 

 1,038 
 (581)

 1.18 
 1.46 
 1.08 
 12.70 

 37.50 
 21.00 
 24.30 

 48.1 
 45.6 
 – 
 9.4 
 11.6 
 7.7 
 9.6 
 2.8 
 – 
 1,006 
 4.8 
 4.4 
 31.7 
 7.2 
 199 
 198 

 2,775 
 541 
 309 

 7,157 
 600 
 1,837 
 496 
 – 
 2,299 
 – 
 5,232 

 847 
 (410)

 1.53 
 1.31 
 1.00 
 11.39 

 34.00 
 23.79 
 33.35 

 46.8 
 44.0 
 – 
 13.1 
 10.5 
 9.8 
 9.7 
 3.3 
 – 
 980 
 4.2 
 3.0 
 30.7 
 6.6 
 202 
 201 

 2,786 

 2,772 

 2,084 

 2,235 

 2,389 

 2,343 

 2,200 

 2,201 

 5,111 
 1,531 
 2,204 
 – 
 8,846 
 45,002 

 5,111 
 1,779 
 2,202 
 396 
 9,488 
 42,482 

 4,551 
 1,731 
 2,058 
 390 
 8,730 
 38,750 

 4,325 
 1,567 
 1,974 
 390 
 8,256 
 41,012 

 4,688 
 1,648 
 1,950 
 390 
 8,676 
 48,614 

 4,967 
 1,843 
 1,965 
 – 
 8,775 
 45,736 

 4,942 
 1,913 
 1,218 
 – 
 8,073 
 48,891 

 4,942 
 1,960 
 1,122 
 – 
 8,024 
 50,395 

Earnings coverage = net earnings attributable to shareholders + income taxes + net interest expense / 
50 per cent dividends paid on preferred shares + interest on debt - interest income

Dividend  coverage  =  comparable  cash  flow  from  operating  activities  /  cash  dividends  paid  on 
common shares

Return  on  capital  employed  =  earnings  before  non-controlling  interests  and  income  taxes  +  net 
interest  expense  or  comparable  earnings  before  non-controlling  interests  and  income  taxes  +  net 
interest expense / invested capital excluding AOCI

Dividend yield = dividends paid per common share / current year’s close price

Dividend payout ratio = common share dividends declared / comparable funds from operations - 50 
per cent dividends paid on preferred shares

Comparable funds from operations before interest to adjusted interest coverage = comparable  funds 
from operations + interest on debt - interest income - capitalized interest / interest on debt + 50 per 
cent dividends paid on preferred shares - interest income

Adjusted comparable funds from operations to adjusted net debt = comparable funds from operations 
-  50  per  cent  dividends  paid  on  preferred  shares  /  period-end  long-term  debt  and  finance  lease 
obligations including fair value (asset) liability of hedging instruments on debt + 50 per cent issued 
preferred shares - cash and cash equivalents

Comparable  EBITDA  =  operating  income  +  depreciation  and  amortization  per  the  Consolidated 
Statements of Cash Flows +/- non-comparable items

201

TransAlta Corporation    |    2017  Annual Integrated Report 
 
Plant Summary

As of January 2018
Coal
6 Facilities

Total Coal
Gas
12 Facilities

Total Gas
Wind
20 Facilities

Total Wind
Solar
1 Facility
Total Solar
Hydro
27 Facilities

Total Hydro
Total

Facility*
Sundance, AB 

Keephills, AB

Keephills 3, AB
Genesee 3, AB
Sheerness, AB

Centralia, WA

Poplar Creek, AB(9)
Fort Saskatchewan, AB
Sarnia, ON*
Mississauga, ON
Ottawa, ON
Windsor, ON
Southern Cross, WA*(10)(11)
South Hedland, WA*(11)(12)
Parkeston, WA*(11)

Summerview 1, AB*
Summerview 2, AB*
Ardenville, AB*
Blue Trail, AB*
Castle River, AB*(13)
McBride Lake, AB*
Soderglen, AB*
Cowley North, AB*
Sinnott, AB*
Macleod Flats, AB*
Melancthon, ON*(14)
Wolfe Island, ON*
Kent Breeze, ON
Kent Hills, NB*(14)
Le Nordais, QC* 
New Richmond, QC*
Wyoming Wind, WY*
Lakeswind, MN

Mass Solar, MA(15)

Brazeau, AB
Bighorn, AB
Spray, AB
Ghost, AB
Rundle, AB
Cascade, AB
Kananaskis, AB
Bearspaw, AB
Pocaterra, AB
Horseshoe, AB
Barrier, AB
Taylor, AB*
Interlakes, AB
Belly River, AB*
Three Sisters, AB
Waterton, AB*
St. Mary, AB*
Upper Mamquam, BC*
Pingston, BC*
Bone Creek, BC*
Akolkolex, BC*
Ragged Chute, ON*
Misema, ON*
Galetta, ON*
Appleton, ON*
Moose Rapids, ON*
Skookumchuck, WA

Installed 
capacity 
(MW)(1)
1,861

Ownership  
(%)
100%

Owned 
capacity 
(MW)(1)(2)

Region
1,861 Western Canada

Revenue  
source
Alberta PPA(3)/
Merchant(4)
Alberta PPA/
Merchant(5)
Merchant
Merchant
Alberta PPA/ 
Merchant(6)
LTC(7)/Merchant

LTC
LTC
LTC
LTC
LTC/Merchant
LTC/Merchant
LTC
LTC
LTC

Merchant
Merchant
Merchant
Merchant
Merchant
LTC
Merchant
Merchant
Merchant
Merchant
LTC
LTC
LTC
LTC
LTC
LTC
LTC 
LTC

Contract  
expiry date
2018

2020

-
-
2020

2020-2025(8)

2030
2019
2022-2025
2018
2017-2033
2031
2023
2042
2026

-
-
-
-
-
2024
-
-
-
-
2026-2028
2029
2031
2033-2035
2033
2033
2028
2034

790 Western Canada

232 Western Canada
233 Western Canada
198 Western Canada

1,340
4,653

United States

230 Western Canada
35 Western Canada
Eastern Canada
Eastern Canada
Eastern Canada
Eastern Canada
Australia
Australia
Australia

506
54
37
36
245
150
55
1,348

70 Western Canada
66 Western Canada
69 Western Canada
66 Western Canada
44 Western Canada
38 Western Canada
35 Western Canada
20 Western Canada
7 Western Canada
3 Western Canada
Eastern Canada
Eastern Canada
Eastern Canada
Eastern Canada
Eastern Canada
Eastern Canada
United States
United States

200
198
20
125
98
68
144
50
1,318
21

United States

LTC

2032-2045

21

355 Western Canada
120 Western Canada
112 Western Canada
54 Western Canada
50 Western Canada
36 Western Canada
19 Western Canada
17 Western Canada
15 Western Canada
14 Western Canada
13 Western Canada
13 Western Canada
5 Western Canada
3 Western Canada
3 Western Canada
3 Western Canada
2 Western Canada
25 Western Canada
23 Western Canada
19 Western Canada
10 Western Canada
Eastern Canada
7
Eastern Canada
3
Eastern Canada
2
Eastern Canada
1
Eastern Canada
1
United States
1
926
8,266

Alberta PPA
Alberta PPA
Alberta PPA
Alberta PPA
Alberta PPA
Alberta PPA
Alberta PPA 
Alberta PPA
Merchant
Alberta PPA
Alberta PPA
Merchant
Alberta PPA 
Merchant
Alberta PPA
Merchant
Merchant
LTC 
LTC
LTC
LTC
LTC
LTC
LTC
LTC
LTC
LTC

2020
2020
2020
2020
2020
2020
2020
2020
-
2020
2020
-
2020
-
2020
-
-
2025
2023
2031
2046
2029
2027
2030
2030
2030
2020

100%

50%
50%
25%

100%

100%
30%
100%
50%
50%
50%
100%
100%
50%

100%
100%
100%
100%
100%
50%
50%
100%
100%
100%
100%
100%
100%
83%
100%
100%
100%
100%

100%

100%
100%
100%
100%
100%
100%
100%
100%
100%
100%
100%
100%
100%
100%
100%
100%
100%
100%
50%
100%
100%
100%
100%
100%
100%
100%
100%

790

463
466
790

1,340
5,710
230
118
506
108
74
72
245
150
110
1,613
70
66
69
66
44
75
71
20
7
3
200
198
20
150
98
68
144
50
1,417
21

21
355
120
112
54
50
36
19
17
15
14
13
13
5
3
3
3
2
25
45
19
10
7
3
2
1
1
1
948
9,709

   *  TransAlta Renewables Inc. facility.
(1)  Megawatts are rounded to the nearest whole number; columns may not add due to rounding.
(2)  Accounts for 100% of TransAlta Renewables assets. As of December 31, 2017, TransAlta owns 

approximately 64% of the outstanding shares of TransAlta Renewables.

(3)  PPA refers to Power Purchase Arrangement to be terminated on March 31, 2018.
(4)  Merchant capacity refers to uprates on unit 3 (15 MW), unit 4 (53 MW), unit 5 (53 MW)  

and unit 6 (44 MW).

(5)  Merchant capacity refers to uprates on unit 1 (12 MW) and unit 2 (12 MW).
(6)  Merchant capacity refers to uprates on unit 1 (10 MW).
(7)  LTC refers to Long-Term Contract.

(8)  Contract is in place until 2025; however, one unit is set to retire in 2020.
(9)  The Poplar Creek plant is operated by Suncor and ownership of the facility will transfer  

to Suncor in 2030.

(10)  Comprised of four facilities.
(11)  Gas/diesel.
(12)  Plant is under construction and expected to be fully commissioned in mid-2017.
(13)  Includes seven individual turbines at other locations.
(14)  Comprised of two facilities.
(15)  Comprised of four ground-mounted projects and four roof-top projects.

202

TransAlta Corporation    |    2017  Annual Integrated ReportSustainability Performance Indicators

Corporate Statistics

Environment, Health and Safety Management Systems

2017

2016

2015

Facilities with ISO 14001 and/or OHSAS 18001-based management systems (percentage)(1)
Management system audits(2)

97
20

97
35

97
23

Environmental Performance

Resource or Energy Use(3)
Coal combustion (tonnes)
Natural gas combustion (GJ)
Diesel combustion (L)
Gasoline consumption: vehicle (L)
Diesel consumption: vehicle (L)
Propane consumption: vehicle (L)
Electricity: building operations (MWh)
Natural gas: building operations (GJ)
Propane: building operations (L)
Kerosene: building operations (L)
Total resource or energy use (GJ)(4)

Greenhouse Gas Emissions(5)
Carbon dioxide (tonnes CO2e)  3
Methane (tonnes CO2e)  3
Nitrous oxide (tonnes CO2e)  3
Sulphur hexafluoride (tonnes CO2e)
Total greenhouse gas emissions (tonnes CO2e)(6)  3

Greenhouse gas emission intensity (tonnes CO2e/MWh)(7)  3

Air Emissions(8)

Total sulphur dioxide emissions (tonnes)  3

Sulphur dioxide emission intensity (kg/MWh)(9)  3

Total nitrogen oxide emissions (tonnes)  3

Nitrogen oxide emission intensity (kg/MWh)(9)  3

Total particulate matter emissions (tonnes)  3

Particulate matter emission intensity (kg/MWh)(9)  3

Total mercury emissions (kilograms)  3

Mercury emission intensity (mg/MWh)(9)  3

Water Management(10)

Water intake (million m3)  3
Water discharge (million m3)  3
Water consumption (million m3)  3
Water intensity (m3/MWh)(11)  3

Waste Management(12)
Non-Hazardous

Landfill (tonnes)  3
Landfill (L)  3
Ash disposal: mine (tonnes)(13)  3
Ash disposal: lagoon (tonnes)(14)  3
Recycled (tonnes)  3
Recycled (L)  3
Reuse (tonnes)  3
Storage (tonnes)  3

2017

2016

2015

14,956,400
55,520,900
4,384,700
1,476,700
44,045,200
112,000
290,100
75,500
125,800
96,200
496,910,700

15,735,300
62,486,700
46,179,400
1,487,200
40,224,800
78,800
359,300
58,300
127,500
56,500

16,222,300
63,411,200
22,565,800
1,376,300
43,183,000
113,600
220,800
58,500
102,700
60,100
528,442,794 542,362,600

29,627,700
107,100
190,900
10
29,925,600
0.86

30,381,300
114,200
224,600
20
30,720,100
0.83

31,902,700
112,600
212,400
20
32,227,800
0.87

36,200
1.05
44,400
1.28
5,000
0.14
110
3.29

213
172
41
1.18

39,600
1.08
48,400
1.33
4,900
0.13
130
3.52

239
197
42
1.63

41,800
1.13
48,000
1.30
4,900
0.13
170
4.50

258
212
46
1.24

3,200
63,500
1,338,600
485,500
1,400
4,122,700
827,400
0

2,100
518,400
1,315,000
527,700
18,000
212,100
700,700
8,300

2,400
131,200
1,346,900
501,600
151,100
222,100
707,800
14,800

203

TransAlta Corporation    |    2017  Annual Integrated ReportSustainability Performance Indicators

Environmental Performance (continued)

2017

2016

2015

Waste Management (continued)
Hazardous(15)

Landfill (tonnes)  3
Landfill (L)  3
Recycled (tonnes)  3
Recycled (L)  3

Land Use and Reclamation(16)

Land used in mining activities: disturbed (cumulative hectares)  3
Land used in mining activities: reclaimed (cumulative hectares)  3
Land reclamation (% of land disturbed)(17)  3
Land used in mining activities: disturbed minus reclaimed (hectares)  3
Land used by plants, offices and equipment (hectares)  3
Total land use (cumulative hectares)  3

Environmental Incidents 

Total environmental incidents(18)  3
Environmental enforcement actions
Environmental fines ($ thousands)

Spills(19)

Volume of significant spills (m3)

Social Performance

Workplace Practices

Employees
Number of full-time employees
Number of part-time employees
Number of contingent employees
Employees represented by independent trade union organizations (%)(20)
Voluntary employee turnover rate (%)(21)

Diversity

Women in workforce (%)
Women in senior management (%)
Women on Board of Directors (%)

Health and Safety

Health and safety enforcement actions(22)
Health and safety fines ($ thousands)

Employee & contractor fatalities  3
Lost-time injury (LTI) (absence from work)  3
Medical aids (MA) (no absence from work)  3
Total injuries to employees & contractors  3
Total injury frequency rate (IFR) (employees and contractors)(23)  3
Total incident frequency (TIF) (employees and contractors)(24)

Reportable vehicle incidents

Community Relations

Community investments ($ millions)(25)

3  2017 data has been third-party assured to a limited assurance level by Ernst & Young LLP.
Please see “Discussion and Notes on Numbers” for footnote explanations.

204

40
14,600
12,740
20,140,400

40
13,110
60
17,209,560

40
3,300
80
536,100

12,100
4,600
38
7,400
3,900
11,300

5
0
0

15

11,800
4,600
39
7,200
2,700
9,900

16
0
0

61

11,700
4,500
39
7,200
2,700
9,900

12
1
1.7

19

2017

2016

2015

2,228
2,125
24
79
57
10.65

19
26
40

4
0

0
6
15
21
0.72
3.54

35

2,341
2,267
26
48
53
6.71

18
26
33

4
5.4

0
4
20
24
0.85
3.29

33

2.6

2.5

2,380
2,301
26
53
54
5.22

18
25
30

0
0

0
5
20
25
0.75
3.04

28

3.5

TransAlta Corporation    |    2017  Annual Integrated ReportSustainability Performance Indicators

Discussion and Notes on Numbers

TransAlta  continually  strives  to  improve  the  accuracy  and  coverage  of  our  sustainability  performance 
reporting to stakeholders. We review our processes and controls relating to the measurement and calculation 
of key sustainability data annually. Several footnotes appear throughout the statistical summary and are 
intended to provide clarity on specific boundary conditions, changes in methodology and definitions. For 
questions or clarity on any key performance indicators, please contact us at sustainability@transalta.com.

(1) 

(2) 
(3) 

ISO 14001 and ISO 18001 are the world’s most recognized standards for Environmental Management and Health and Safety Management systems. TransAlta has 
ownership in 67 facilities. 
Internal audits conducted against ISO management systems, regulatory frameworks and the Alberta Certificate of Recognition standard. 
Energy use is calculated and reported from TransAlta-operated facilities, following the same approach we use for greenhouse gas (GHG) emissions reporting, which is 
the application of an Operational Control boundary.

(4)  Our 2016 energy data was revised in 2017, due to changes in our 2016 diesel combustion at our Centralia facility and 2016 natural gas combustion and diesel combustion 
at our Sarnia facility. Centralia 2016 diesel combustion was misreported in 2016. Sarnia 2016 energy data was misreported due to IT system-related errors. Sarnia 2016 
vehicle diesel usage was applied incorrectly. Diesel usage was for a diesel backup generator and volumes were applied to diesel combustion and not diesel consumption 
from vehicles.

(5)  Greenhouse gas (GHG) emissions are calculated and reported from TransAlta-operated facilities in line with carbon regulations where the facility is located and with The 
Greenhouse Gas Protocol: A Corporate Accounting and Reporting Standard (specifically ‘Setting Organizational Boundaries: Operational Control’ methodology). 
As per the Operational Control methodology TransAlta reports 100 per cent of GHG emissions from facilities at which we are the operator. GHG emissions include 
emissions from stationary combustion, transportation use, building use and fugitive emissions. 

(6)  Gross GHG emissions or gross carbon dioxide equivalent (CO2e) emissions is the sum of carbon dioxide, methane, nitrous oxide and sulfur hexafluoride. Coincidentally the 
sum of scope 1 and 2 emissions will equate to gross CO2e emissions or gross GHG emissions. Our 2016 GHG data was revised in 2017, due to changes in our 2016 diesel 
combustion at our Centralia facility and 2016 natural gas combustion and diesel combustion at our Sarnia facility. Please see Note 3 for revision explanations. 

(7)  GHG emission intensity is calculated by dividing total operational emissions by 100 per cent of production (MWh) from operated facilities, irrespective of financial 
ownership. Our Australia 2016 production data was revised in 2017 due to metering issues in 2016. As a result our GHG intensity for 2016 dropped from 0.84 to 0.83 
tonnes CO2e/MWh.

(8)  Air emissions are reported from TransAlta-operated facilities, following the same approach we use for GHG reporting, which is the application of an Operational Control 
boundary. Air emissions are expressed in tonnes, except for mercury emissions, which are represented in kilograms. Particulate matter emissions include both PM2.5 and 
PM10.

(9)  Air emission intensities are calculated by dividing total operational emissions by 100 per cent of production (MWh) from operated facilities, irrespective of financial ownership. 
(10)  Water usage is reported from TransAlta-operated facilities, following the same approach we use for GHG reporting, which is the application of an Operational Control 
boundary. Total water consumed is measured by total water intake minus water discharge. Water is used primarily for cooling by our thermal power plants. Evaporative 
losses from the cooling ponds and cooling towers account for 95 per cent of the consumptive loss. The water lost to evaporation is not returned directly to the water body, 
but the water remains in the hydrologic cycle. Sundance 2015 and 2016 historical water data was revised in 2017 due to misalignment in reporting between corporate 
and business unit data. Water volumes that are discharged to our cooling pond, adjacent to Wabamum Lake, were being applied as intake volumes. These volumes are 
discharge volumes and have been reallocated accordingly. 

(11)  Water  intensity  is  calculated  by  dividing  total  operational  water  consumption  (m3)  by  100  per  cent  of  production  (MWh)  from  operated  facilities,  irrespective  of  

financial ownership. 

(12)  Non-hazardous waste includes, but is not limited to, the disposal of water treatment chemicals, coal refuse (including ash byproducts), metals, paper, cardboard and 

building materials.

(13)  Ash disposal: mine is fly ash and bottom ash from coal production, which is treated and then returned to its original source, the mine, for landfill/disposal.
(14)  Ash disposal: lagoon is fly ash and bottom ash from Keephills coal production, which is treated and then sent to ash lagoons for disposal.
(15)  Hazardous wastes are substances going for disposal, which – either in the short or the long term – can be harmful to people, plants, animals or the environment.
(16)  Total land use is mining land use plus land used by plants, offices and equipment.
(17)  Disturbed land use Highvale mine volumes were reconciled in 2017 to match Alberta regulatory reporting data. Actual disturbed volumes in 2017 were 160 hectares and 
these volumes were reconciled with 80 hectares to ensure our total land disturbed volumes align. As a result our land reclamation percentage was down one per cent 
compared with 2016 data.

(18)  Significant environmental incidents are reported to an external regulatory agency, which may result in a fine, penalty or corrective action.
(19)  Substances released to the environment include, but are not limited to, ash, glycol, diesel, oils and other chemicals. 
(20)  TransAlta has over 1,200 unionized workers working primarily at our operations.
(21)  Voluntary turnover is aligned with our Human Resources voluntary turnover reporting methodology. As per this methodology, voluntary turnover is any full-time, part-

time or contingent employee initiated exit, excluding retirement. Summer students and temporary workers are not considered within voluntary turnover. 

(22)  Health and safety incidents are those resulting in a regulatory enforcement action. Enforcement actions could take the form of a warning letter, fine or non-financial 

reprimand or restriction on operations. In 2016 we had four traffic enforcement actions that resulted in fines of C$5,000.

(23)  The injury frequency rate (IFR) measures work-related medical aid and lost-time injuries per 200,000 hours worked. IFR is calculated using a combination of actual and 
estimated exposure hours. During the course of the year, all work-related safety incidents are investigated. These investigations may provide new information that would 
result in an incident being reclassified. 

(24)  Total incident frequency (TIF) tracks the total number of injuries (medical aids, lost-time injuries, restricted works and first aids) relative to employee hours worked.
(25)  Cumulative of donations and sponsorship totals in the respective calendar year. This investment figure does not include donations from our employees. 

205

TransAlta Corporation    |    2017  Annual Integrated ReportIndependent Sustainability Assurance Statement

To the Board of Directors and Management of TransAlta Corporation (“TransAlta”).

Scope of Ernst & Young LLP (“EY”) 
Engagement
EY responsibilities included providing limited assurance over 

Criteria
TransAlta has prepared its specified performance information 

in accordance with industry standards and, where relevant, 

a selection of performance indicators.

internally developed criteria.

Subject Matter
We have performed limited assurance procedures for the 

TransAlta Management Responsibilities
The Subject Matter was prepared by the management of 

following quantitative performance indicators (“Subject 

TransAlta, which is responsible for the assertions, statements 

Matter”) for the year ending December 31, 2017.

and claims made therein (including the assertions we have 

•  Sulphur dioxide emissions and emission intensity  

been engaged to provide limited assurance over); the 

(tonnes, kg/MWh)

•  Nitrogen oxide emissions and emission intensity  

(tonnes, kg/MWh)

•  Particulate matter emissions and emission intensity 

(tonnes, kg/MWh)

•  Mercury emissions and emission intensity  

(kg, mg/MWh)

•  Carbon dioxide emissions (tonnes CO2e)
•  Methane emissions (tonnes CO2e)
•  Nitrous oxide emissions (tonnes CO2e)
•  Gross greenhouse gas emissions and emissions intensity 

(tonnes CO2e, tonnes CO2e/GWh)

•  Total environmental incidents

•  Lost-time incident for employees and contractors  

(LTI) (absence from work)

•  Medical aids (MA) for employees and contractors  

(no absence from work)

•  Total injuries to employees and contractors

•  Employee and contractor recordable (LTI & MA)
injury frequency rate (injuries/200,000 hours)

•  Employee and contractor fatalities
•  Water intake, discharge, consumption (million m3)
•  Water intensity (m3/MWh)

collection, quantification and presentation of the performance 

indicators; and the criteria used in determining that the 

information is appropriate for the purpose of disclosure in this 

Report (“the Report”). In addition, management is responsible 

for maintaining adequate records and internal controls that 

are designed to support the reporting process.

EY Responsibilities
Our limited assurance procedures have been planned and 

performed in accordance with the International Standard  

on Assurance Engagements 3000 “Assurance Engagements 

other than Audits or Reviews of Historical Financial 

Information”. 

Our procedures were designed to obtain a limited level of 

assurance on which to base our conclusion. The procedures 

conducted do not provide all the evidence that would be 

required in a reasonable assurance engagement and, 

accordingly, we do not express a reasonable level of 

assurance. While we considered the effectiveness of 

management’s internal controls when determining the nature 

and extent of our procedures, our assurance engagement 

•  Waste management – Non-hazardous

was not designed to provide assurance on internal controls 

  •  Landfill (tonnes, L)

  •  Ash disposal: mine, lagoon (tonnes)

  •  Recycled (tonnes, L)

  •  Reuse (tonnes)

  •  Storage (tonnes)

•  Waste management – hazardous

  •  Landfill (tonnes, L)

  •  Recycled (tonnes, L)

•  Land use – disturbed and reclaimed

206

and, accordingly, we express no conclusions thereon. 

This assurance statement has been prepared for TransAlta 

for the purpose of assisting management in determining 

whether the Subject Matter is in accordance with the criteria 

and for no other purpose. Our assurance statement is made 

solely to TransAlta in accordance with the terms of our 

engagement. We do not accept or assume responsibility  

to anyone other than TransAlta for our work, or for the 

conclusions we have reached in this assurance statement. 

TransAlta Corporation    |    2017  Annual Integrated Report 
Independent Sustainability Assurance Statement

Assurance Procedures
We planned and performed our work to obtain all the 

Independence and Competency Statement
In conducting our engagement, we have complied with  

evidence, information and explanations considered necessary 

the applicable requirements of the Code of Ethics for 

in relation to the above scope. Our assurance procedures 

Professional Accountants issued by the International Ethics 

included but were not limited to:

Standards Board for Accountants.

EY Conclusion
Based on our procedures for this limited assurance 

engagement described in this statement, nothing has come 

to our attention that causes us to believe that the Subject 

Matter is not, in all material respects, reported in accordance 

with the relevant criteria. 

Ernst & Young LLP

Calgary, Canada

March 1, 2018

•  Interviewing relevant personnel at the head office and at 

various sites to understand data management processes 

related to the selected performance indicators.

•  Checking the accuracy of calculations performed – on a test 

basis – primarily through inquiry, variance analysis and 

performance of re-calculations.

•  Assessing risk of material misstatement due to fraud or 

errors relating to the selected performance indicators.

•  Evaluating the overall presentation of the Report, including 

the consistency of the Subject Matter.

Limitations of EY Work Performed
Our scope of work did not include expressing conclusions in 

relation to:

•  The materiality, completeness or accuracy of data sets or 

information relating to areas other than the selected 

performance data, and any site-specific information.

•  Management’s forward-looking statements.

•  Any comparisons made by TransAlta against historical data.

•  The appropriateness of definitions for internally developed 

criteria.

207

TransAlta Corporation    |    2017  Annual Integrated ReportShareholder Information

Annual Meeting
The Annual and Special Meeting of 
Shareholders will be held at 10:00 a.m. 
MST, on Friday, April 20, 2018, 
in the Palomino Room (E-H)
at the BMO Centre (Stampede Park)
20 Roundup Way SW, Calgary, Alberta.

Special Services for Registered Shareholders
Service

Description

Direct deposit for  
dividend payments

Account  
consolidations

Automatically have dividend payments deposited  
to your bank account

Eliminate costly duplicate mailings by consolidating 
account registrations

Address changes and  
share transfers

Receive tax slips and dividends without the delays 
resulting from address and ownership changes

Stock Splits and Share Consolidations
Date

Events

May 8, 1980

Feb. 1, 1988

Dec. 31, 1992

Stock split
Stock split(1)

Reorganization – TransAlta Utilities shares exchanged 
for TransAlta Corporation shares(2) 1:1

The valuation date value of common shares owned on Dec. 31, 1971, adjusted for stock splits, is $4.54 per share.
(1)  The adjusted cost base for shares held on Jan. 31, 1988, was reduced by $0.75 per share following the Feb. 1, 

1988 share split.

(2)  TransAlta Utilities Corporation became a wholly owned subsidiary of TransAlta Corporation as a result of  

this reorganization.

Dividend Declaration for Common Shares
Dividends are paid quarterly as determined by the Board. Dividends on our 
common shares are at the discretion of the Board. In determining the payment and 
level of future dividends, the Board considers our financial performance, results of 
operations, cash flow and needs, with respect to financing our ongoing operations 
and growth, balanced against returning capital to shareholders. The Board 
continues to focus on building sustainable earnings and cash flow growth.

Common Share Dividends Declared in 2017
Record Date
Payment Date

Ex-Dividend Date

July 1, 2017

Oct. 1, 2017

Jan. 1, 2018

June 1, 2017

Sept. 1, 2017

Dec. 1, 2017

May 30, 2017

Aug. 30, 2017

Nov. 30, 2017

Dividend

$0.04

$0.04

$0.04

Dividends are paid on the first of the month in January, April, July and October. When a dividend payment date 
falls on a weekend or holiday, the payment is made on the following business day. Only dividend payments that 
have been approved by the Board of Directors are included in this table.

Submission of Concerns Regarding Accounting  
or Auditing Matters
TransAlta has adopted a procedure for employees, shareholders or others to report 
concerns or complaints regarding accounting or other matters on an anonymous, 
confidential basis to the Audit and Risk Committee of the Board of Directors. Such 
submissions may be directed to the Audit and Risk Committee c/o the Chief Legal 
and Compliance Officer and Corporate Secretary of the Corporation.

Transfer Agent
AST Trust Company (Canada)*
P.O. Box 700 Station “B” 
Montreal, Quebec H3B 3K3

Phone
North America:
1.800.387.0825 toll-free
Toronto/outside North America: 
416.682.3860

Email
inquiries@astfinancial.com

Fax
514.985.8843

Website
www.astfinancial.com/ca-en

Exchanges
Toronto Stock Exchange (TSX)
New York Stock Exchange (NYSE)

Ticker Symbols
TransAlta Corporation common shares:
TSX: TA, NYSE: TAC
TransAlta Corporation preferred shares:
TSX: TA.PR.D, TA.PR.E, TA.PR.F, 
TA.PR.H, TA.PR.J

*  AST  Trust  Company  (Canada),  formerly  CST  Trust 
Company,  changed  its  name  on  July  20,  2017.    CST 
Trust  Company  has  succeeded  CIBC  Mellon  Trust 
Company as our transfer agent. On Nov. 1, 2010, CIBC 
Mellon Trust Company sold its issuer services business 
to  Canadian  Stock  Transfer  Company  Inc.,  which 
operated  the  business  on  their  behalf  until  Aug.  30, 
2013, at which time CST Trust Company, an affiliate of 
Canadian Stock Transfer Company Inc., received federal 
approval to commence business.

208

TransAlta Corporation    |    2017  Annual Integrated ReportShareholder Information

Dividend Declaration for Preferred Shares
Series A: Fixed cumulative preferential cash dividends are paid quarterly when 
declared by the Board at the annual rate of $0.67724 per share from and including 
March 31, 2016, to but excluding March 31, 2021.

Voting Rights
Common shareholders receive one  
vote for each common share held.

Additional Information
Requests can be directed to:

Investor Relations
TransAlta Corporation
110 - 12th Avenue SW
P.O. Box 1900, Station “M”
Calgary, Alberta T2P 2M1

Phone
North America:
1.800.387.3598 toll-free
Calgary/outside North America: 
403.267.2520

Email
investor_relations@transalta.com

Fax
403.267.7405

Website
www.transalta.com

Series B: Floating cumulative preferential cash dividends are paid quarterly  
when declared by the Board from and including March 31, 2016, to but excluding 
March 31, 2021.

Series C: Fixed cumulative preferential cash dividends are paid quarterly when 
declared by the Board at the annual rate of $1.01 per share from and including 
June 30, 2017, to but excluding June 30, 2022.

Series E: Fixed cumulative preferential cash dividends are paid quarterly when 
declared by the Board at the annual rate of $1.30 per share from and including 
September 30, 2017, to but excluding Sept. 30, 2022.

Series G: Fixed cumulative preferential cash dividends are paid quarterly when 
declared by the Board at the annual rate of $1.325 per share from the date of issue 
Aug. 15, 2014, to but excluding Sept. 30, 2019.

Preferred Share Dividends Declared in 2017
Series A
Payment Date
June 30, 2017
Sept. 30, 2017
Dec. 31, 2017

Record Date
June 1, 2017
Sept. 1, 2017
Dec. 1, 2017

Ex-Dividend Date
May 30, 2017
Aug. 30, 2017
Nov. 30, 2017

Series B
Payment Date
June 30, 2017
Sept. 30, 2017
Dec. 31, 2017

Series C
Payment Date
June 30, 2017
Sept. 30, 2017
Dec. 31, 2017

Series E
Payment Date
June 30, 2017
Sept. 30, 2017
Dec. 31, 2017

Series G
Payment Date
June 30, 2017
Sept. 30, 2017
Dec. 31, 2017

Record Date
June 1, 2017
Sept. 1, 2017
Dec. 1, 2017

Record Date
June 1, 2017
Sept. 1, 2017
Dec. 1, 2017

Record Date
June 1, 2017
Sept. 1, 2017
Dec. 1, 2017

Record Date
June 1, 2017
Sept. 1, 2017
Dec. 1, 2017

Ex-Dividend Date
May 30, 2017
Aug. 30, 2017
Nov. 30, 2017

Ex-Dividend Date
May 30, 2017
Aug. 30, 2017
Nov. 30, 2017

Ex-Dividend Date
May 30, 2017
Aug. 30, 2017
Nov. 30, 2017

Ex-Dividend Date
May 30, 2017
Aug. 30, 2017
Nov. 30, 2017

Dividend
$0.16931
$0.16931
$0.16931

Dividend
$0.15645
$0.16125
$0.17467

Dividend
$0.2875
$0.25169
$0.25169

Dividend
$0.3125
$0.3125
$0.32463

Dividend
$0.33125
$0.33125
$0.33125

Dividends are paid on the last day of the month in March, June, September and December. When a dividend 
payment date falls on a weekend or holiday, the payment is made on the following business day. Only dividend 
payments that have been approved by the Board of Directors are included in this table.

209

TransAlta Corporation    |    2017  Annual Integrated ReportShareholder Highlights

180

150

120

90

60

30

Total Shareholder Return vs. S&P/TSX Composite Index
Year ended Dec. 31 ($)

TransAlta

S&P/TSX Composite

08

100

100

09

102

131

10

97

150

11

102

133

12

78

13

76

14

63

15

32

16

50

17

51

138

152

163

145

170

180

This chart compares what $100 invested in TransAlta and the S&P/TSX Composite Index at the end of 2008 
would be worth today, assuming the reinvestment of all dividends.

08

09

10

11

12

13

14

15

16

17

TransAlta

S&P/TSX Composite

Source: FactSet

40.00

30.00

20.00

10.00

Ten-Year Trading Range and Market Value vs. Book Value
Year ended Dec. 31 ($ per share)

08

09

10

11

12

13

14

Market Value

24.30 23.48

21.15

21.02

15.12

13.48

10.52

Book Value

12.70

13.41

12.85

12.08

8.78

7.92

8.52

15

4.91

8.52

16

7.43

8.92

17

7.45

8.28

Amounts presented or included in calculations prior to 2010 represent Canadian Generally Accepted Accounting 
Principles (GAAP) figures and have not been restated under International Financial Reporting Standards (IFRS).

08

09

10

11

12

13

14

15

16

17

Market Value

Book Value

Trading Range

Source: FactSet and TransAlta

30

20

10

$9

$6

$3

Monthly Volume and Market Prices
(2017)

Volume (millions)

Jan

12

Feb Mar Apr May

15

13

13

14

Jun

15

Jul Aug

Sep Oct Nov Dec

14

8

7

6

7

11

TSX closing price

7.70

7.11

7.82 6.99

7.62 8.29

8.13

7.67

7.30 7.63

7.77

7.45

J

JMAMF

DNOSAJ

Volume
(millions of shares)

TSX closing price
($ per share)

Source: FactSet 

Return on Common Shareholders’ Equity
(%)

ROE

08

9.4

09

6.9

10

9.6

11

12

13

10.6 (25.9)

(3.2)

14

6.3

15

16

17

(1.2)

5.4 (10.0)

Amounts presented or included in calculations prior to 2010 represent GAAP figures and have not been restated 
under IFRS.

The methodologies and ratios used by rating agencies to assess our credit rating are not publicly disclosed. We 
have developed our own definitions of ratios and targets to manage our capital. These metrics and ratios are not 
defined under IFRS, and may not be comparable to those used by other entities or by rating agencies.

Source: TransAlta

08

09

10

11

12

13

14

15

16

17

30

20

10

0

(10)

(20)

(30)

210

TransAlta Corporation    |    2017  Annual Integrated ReportCorporate Information

Corporate Governance: 
New York Stock Exchange Disclosure Differences
TransAlta’s  Corporate  Governance  Guidelines,  Board  Charter,  Committee 
Charters, position descriptions for the Chair, Committee Chairs, President & CEO, 
and  codes  of  business  conduct  and  ethics  are  available  on  our  website  at  
www.transalta.com. Also available on our website is a summary of the significant 
ways in which TransAlta’s corporate governance practices differ from those 
required to be followed by US domestic companies under the New York Stock 
Exchange’s listing standards. Currently there are no differences between our 
governance practices and those of the New York Stock Exchange.

Ethics Helpline
The Board of Directors has established an anonymous and confidential internet 
portal, email address and toll-free telephone number for employees, contractors, 
shareholders and other stakeholders to contact with respect to accounting 
irregularities, ethical violations or any other matters they wish to bring to the 
attention of the Board.

The Ethics Helpline phone number is 1.855.374.3801 (US/Canada)  
and 1.800.339276 (Australia)
Internet portal: transalta.ethicspoint.com
Email: TA_ethics_helpline@transalta.com

Any communications to the Board of Directors may also be sent to  
corporate_secretary@transalta.com 

TransAlta Corporate Officers

Dawn L. Farrell
President and Chief Executive Officer

Donald Tremblay
Chief Financial Officer

Brett M. Gellner
Chief Investment Officer

Dawn E. de Lima
Chief Administrative Officer

John H. Kousinioris
Chief Legal and Compliance Officer  
and Corporate Secretary

Aron J. Willis
Senior Vice-President,  
Gas & Renewables

Wayne A. Collins
Executive Vice-President,  
Coal and Mining Operations

Jennifer M. Pierce
Senior Vice-President,  
Trading & Marketing

Nipa Chakravarti
Chief Transformation Officer

Todd J. Stack
Managing Director,  
Corporate Controller

Brent Ward
Managing Director and Treasurer

Scott T. Jeffers
Assistant Corporate Secretary  
and Legal Counsel

211

TransAlta Corporation    |    2017  Annual Integrated ReportGlossary of Key Terms

Alberta Power Purchase Arrangement (PPA)
A long-term arrangement established by regulation for the 
sale of electric energy from formerly regulated generating 
units to PPA buyers.

Availability
A measure of time, expressed as a percentage of continuous 
operation 24 hours a day, 365 days a year, that a generating 
unit is capable of generating electricity, regardless of whether 
or not it is actually generating electricity.

Boiler
A  device  for  generating  steam  for  power,  processing  or 
heating purposes, or for producing hot water for heating 
purposes  or  hot  water  supply.  Heat  from  an  external 
combustion source is transmitted to a fluid contained within 
the tubes of the boiler shell.

Capacity
The  rated  continuous  load-carrying  ability,  expressed  in 
megawatts, of generation equipment.

Cogeneration
A generating facility that produces electricity and another 
form of useful thermal energy (such as heat or steam) used 
for industrial, commercial, heating or cooling purposes.

Combined Cycle
An  electric  generating  technology  in  which  electricity  is 
produced from otherwise lost waste heat exiting from one or 
more gas (combustion) turbines. The exiting heat is routed to 
a conventional boiler or to a heat recovery steam generator for 
use by a steam turbine in the production of electricity. This 
process increases the efficiency of the electric generating unit.

Derate
To lower the rated electrical capability of a power generating 
facility or unit.

Force Majeure
Literally means “greater force.” These clauses excuse a party 
from liability if some unforeseen event beyond the control of 
that party prevents it from performing its obligations under 
the contract.

Gigajoule (GJ)
A metric unit of energy commonly used in the energy industry. 
One GJ equals 947,817 British Thermal Units (Btu).

Gigawatt (GW)
A measure of electric power equal to 1,000 megawatts.

Gigawatt Hour (GWh)
A measure of electricity consumption equivalent to the use of 
1,000 megawatts of power over a period of one hour.

Greenhouse Gas (GHG)
A gas that has the  potential to retain heat in the atmosphere, 
including water vapour, carbon dioxide, methane, nitrous 
oxide, hydrofluorocarbons and perfluorocarbons.

Heat Rate
A measure of conversion, expressed as Btu/MWh, of the 
amount of thermal energy required to generate electrical energy.

Megawatt (MW)
A measure of electric power equal to 1,000,000 watts.

Megawatt Hour (MWh)
A measure of electricity consumption equivalent to the use of 
1,000,000 watts of power over a period of one hour.

Merchant
A term used to describe assets that are not contracted and 
are exposed to market pricing.

212

TransAlta Corporation    |    2017  Annual Integrated ReportNet Maximum Capacity
The  maximum  capacity  or  effective  rating,  modified  for 
ambient limitations, that a generating unit or power plant can 
sustain over a specific period, less the capacity used to supply 
the demand of station service or auxiliary needs.

Renewable Power
Power generated from renewable terrestrial mechanisms 
including  wind,  geothermal,  solar  and  biomass  with 
regeneration.

Spark Spread
A measure of gross margin per MW (sales price less cost of 
natural gas).

Supercritical Combustion Technology
The most advanced coal-combustion technology in Canada 
employing a supercritical boiler, high-efficiency multi-stage 
turbine, flue gas desulphurization unit (scrubber), bag house 
and low nitrogen oxide burners.

Glossary of Key Terms

Turbine
A machine for generating rotary mechanical power from the 
energy of a stream of fluid (such as water, steam or hot gas). 
Turbines convert the kinetic energy of fluids to mechanical 
energy through the principles of impulse and reaction or a 
mixture of the two.

Turnaround
Periodic planned shutdown of a generating unit for major 
maintenance and repairs. Duration is normally in weeks. The 
time is measured from unit shutdown to putting the unit back 
on line.

Unplanned Outage
The shutdown of a generating unit due to an unanticipated 
breakdown.

Uprate
To  increase  the  rated  electrical  capability  of  a  power 
generating facility or unit.

Value at Risk (VaR)
A measure used to manage exposure to market risk from 
commodity risk management activities.

In an effort to be environmentally responsible, please notify your financial institution if you are receiving duplicate mail ings of this annual report.

The TransAlta design and TransAlta wordmark are trademarks of TransAlta Corporation.

This report was printed in Canada. The paper, paper mills and printer are all certified by the Forest Stewardship Council, which is an  
international network that promotes environmentally appropriate and socially beneficial management of the world’s forests.

Design & Production: One Design Inc.
Printing: Merrill Corporation

TransAlta Corporation
110 - 12th Avenue SW
Box 1900, Station “M”
Calgary, Alberta
Canada  T2P 2M1
403.267.7110
www.transalta.com