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Northwest Natural Company

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FY2012 Annual Report · Northwest Natural Company
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2012 NW Natural aNNual r eport

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for 57 consecutive years.

Capital structure at year-end:

Corporate profile

NW Natural (NYSE: NWN) is a 154-year-old 

natural gas local distribution and storage  

company headquartered in Portland, 

Oregon. NW Natural serves about 686,000 

utility customers in Oregon and Southwest  

Washington, and provides gas storage to 

customers on the West Coast. In keeping 

with its steady growth, the company has 

increased dividends paid to shareholders 

ServiCe territory
And StorAge FAcilitieS

WASHINGTON

WASHINGTON

ASTORIA

ASTORIA

MIST STORAGE

VANCOUVER
GASCO LNG

PORTLAND

MIST STORAGE
FIELD TRAINING 
CENTER

THE DALLES

VANCOUVER
GASCO LNG

PORTLAND

SALEM

ALBANY

EUGENE

LINCOLN CITY
OREGON

NEWPORT LNG

KEY

FIELD TRAINING 
CENTER

SALEM

ALBANY

LINCOLN CITY

NEWPORT LNG

COOS BAY

THE DALLES

COOS BAY

EUGENE

NW NATURAL SERVICE TERRITORY
FIELD TRAINING CENTER
REGIONAL RESOURCE CENTER
LNG PLANT
MIST STORAGE
GILL RANCH STORAGE
HEADQUARTERS

OREGON

KEY

NW NATURAL SERVICE TERRITORY
FIELD TRAINING CENTER
REGIONAL RESOURCE CENTER
LNG PLANT
MIST STORAGE
GILL RANCH STORAGE
HEADQUARTERS

NEVADA

SAN FRANCISCO

GILL RANCH

FRESNO

CALIFORNIA

FinAnciAl overview

2012

2011

percent  
increase  
(decrease)

earnings

Financial facts ($000):

Operating revenues

Utility margin

Net income

Financial ratios (%):

 730,607 

 828,055 

 344,527 

 342,970 

 59,855 

 63,898 

Return on average common equity

 8.3 

 9.1 

Long-term debt

Common stock equity

common stock

Shareholder data (000):

 48.5 

 51.5 

 47.3 

 52.7 

Average shares outstanding-basic

 26,831 

 26,687 

Year-end shares outstanding

 26,917 

 26,756 

Per share data ($):

Basic earnings

Diluted earnings

Dividends paid

Dividend rate at year-end

Book value at year-end

Market value at year-end

operating highlights

Gas sales and transportation deliveries 
(000 therms)

Degree days

Customers at year-end

Employees at year-end

dividends paid on common stock
(per share) 

February 15

May 15

August 15

November 15

 2.23 

 2.22 

 1.79 

 1.82 

 27.23 

 44.20 

 2.39 

 2.39 

 1.75 

 1.78 

 26.70 

 47.93 

 1,111,769 

 1,152,354 

 4,152 

 4,652 

 685,941 

 679,543 

 1,092 

 1,050 

 $  0.445 

 $  0.435 

 0.445 

 0.445 

 0.455 

 0.435 

 0.435 

 0.445 

Total dividends paid

 $  1.790 

 $  1.750 

 (12)

 0 )

(6) 

 (9)

 3)       

 (2)

 1) 

 1) 

 (7)

 (7)

 2)

 2 ) 

 2 ) 

 (8)

 (4)

 (11)

 1 ) 

 4)

diluted earnings per share
(in dollars)

dividends paid per share
(in dollars)

$3.00

2.50

2.00

1.50

1.00

.50

0

NEVADA

$1.85

1.80

1.75

1.70

1.65

1.60

1.55

1.50

1.45

1.40

1.35

2008

2009

2010

2011

2012

2008

2009

2010

2011

2012

Diluted earnings per share were $2.22 in 2012.

Annual dividends paid per share in 2012 increased 
for the 57th consecutive year. The current  
indicated annual dividend is $1.82 per share.

LOS ANGELES

SAN FRANCISCO

SAN DIEGO

GILL RANCH

FRESNO

CALIFORNIA

LOS ANGELES

SAN DIEGO

  
 
 
LETTER TO SHAREHOLDERS

3

Gregg Kantor, President and CEO, at our new Sherwood 
Operations and Training Center, which provides field 
employees hands-on, scenario-based training.

Progress is not always a straight line or a smooth path, but when you 

2012 HigHligHts

are a 154-year-old company, small steps add up. In 2012 there were 

plenty of steps forward, though they came with some curves and 

rough terrain.

•	 Renewed	three	key	rate	mechanisms	in	Oregon	–	 
decoupling, weather normalization and our system 
integrity tracker – critical to revenue stability.

Last year, we made significant advancements in our employee training 

and public safety initiatives, maintained industry-leading customer 

•	 Reduced	utility	rates	for	the	fourth	consecutive	year,	

satisfaction scores, and continued to invest in growth – all while  

working through our first Oregon rate case in 10 years. 

in addition to refunding $39 million in gas-cost savings 
to customers.

Without question, the Oregon rate case was one of last year’s key 

•	 Opened	an	advanced	operations	and	training	center	

undertakings. We filed in December of 2011 for two primary reasons. 

First, after allowing the company to rate-base the $250 million gas 

reserves investment with Encana Oil & Gas, the Public Utility Com-

mission of Oregon (OPUC) wanted the opportunity to review our 

rates. Second, our decoupling, weather normalization and system 

integrity mechanisms were due to expire and needed to be renewed. 

that provides field employees with hands-on,  
scenario-based natural gas safety training.

•	

Launched	a	specialized	Emergency	Contact	Center	 
dedicated exclusively to taking emergency calls day 
and night, seven days a week. 

The results of the case announced by the OPUC in late October  

•	 Continued	to	grow	the	utility	by	adding	new	customer	

were mixed. There was good news, disappointing news and news 

yet to be determined. 

hook-ups and investing in gas reserves through our 
innovative partnership with Encana.

The OPUC ruled that NW Natural’s annual revenue requirement 

should be increased $8.7 million or about 1 percent, with an allowed 

rate-base return of 7.78 percent, and an allowed return on equity of 

9.5 percent. This revenue increase, however, included approximately 

$15 million that was already being recovered through the company’s 

•	 Awarded	top-tier	satisfaction	scores	by	J.D.	Power	
and	Associates	from	surveys	of	our	residential	and	
business customers.

 
 
4 LETTER TO SHAREHOLDERS

decoupling mechanism. So overall, the Commission’s decision  

meant a net decrease of about $6 million in utility margin annually. 

The Commission also ruled that the company could not recover 

increases in deferred tax amounts caused by a 2009 Oregon income 

tax	rate	increase.	As	a	result,	we	took	a	one-time,	after-tax	charge	of	

$2.7 million, or 10 cents per share – ending the year with earnings  

of $2.22 per share. 

While these were disappointing outcomes, the good news was that 

three key rate mechanisms – decoupling, weather normalization and 

our system integrity tracker – were renewed. We consider these 

mechanisms fundamental to our core earnings going forward and 

their renewal was a critical objective of our case. The Commission 

decision means we continue to be largely protected from declining 

$1.60

$1.40

$1.20

$1.00

$0.80

$0.60

$0.40

$0.20

$0.00

OREGON RESIDENTIAL RATES
Effective Nov. 1 of Each Year

2008

2009

2010

2011

2012

customer use, warmer than average weather, and regulatory lag  

OREGON RESIDENTIAL RATES

from investments driven by federal pipeline safety requirements.

Oregon residential rates have declined about 30% since 2008.

In addition, the OPUC approved our request to start recovering costs 

related to our environmental cleanup efforts. This new mechanism, 

called	the	Site	Remediation	and	Recovery	Mechanism	or	SRRM,	

Also	under	the	“news	yet	to	be	determined”	category,	the	Commission	

allows for the recovery of prudently incurred past and future environ-

pushed three rate case issues into new regulatory proceedings this 

mental cleanup costs. These costs are primarily associated with  

year, including whether prepaid pension assets should be added to 

sites the company used to manufacture gas for customers dating 

rate base. The Commission ultimately decided to open a new docket 

back to the 1800s. 

on pensions so that it could make a determination that would apply 

to all Oregon energy utilities. Until the conclusion of that proceeding, 

In a rate proceeding that began in the first quarter of 2013, the  

NW Natural will continue to recover its pension expense through 

Commission will determine how to apply a prudence review and  

amounts currently collected in customer rates or deferred through  

earnings test before authorizing the amount to be recovered, but  

the regulatory balancing account for collection in future rates. 

how that mechanism works and what impact it will have on our  

recovery of prudently incurred cleanup costs has not been decided. 

The OPUC has also opened a new docket to review how NW Natural 

recovers its carrying costs on working gas inventory balances, which 

we estimate to be about $4 million in margin annually based on our 

allowed rate of return. Historically, we’ve recovered those costs in 

rates, and we’ll be striving to retain that treatment.

In another proceeding, Commissioners will review the margin-sharing 

agreement we have in place for interstate storage and gas supply 

optimization	activities.	Right	now,	67	percent	of	the	margins	from	 

optimization activities go to customers and 33 percent are retained 

by shareholders. The OPUC wants to review the agreement and  

assess whether it should be revised.

Successful resolution of any of these pending items in 2013 and the  

associated revenues will be in addition to the $8.7 million increase to 

base rates we received in the October 2012 Commission decision.

While we didn’t get all we hoped for in the rate case, we did secure 

the regulatory mechanisms that provide NW Natural a stable  

foundation and the opportunity to grow in the future. 

Residential and business customers consistently 
give us top scores in surveys conducted by J.D. 
Power and Associates.

The general rate case took a great deal of time and focus, but it did 

not distract us from working on the basics of our business. In 2012,  

LETTER TO SHAREHOLDERS

5

NW Natural continued to make progress on our most fundamental  

Delivering superior customer service consistently over the long run 

commitment: Safety. 

requires that employees have the right tools and skills. This year we 

continued to update our resource centers to provide a workspace 

Delivering on our commitments

that	meets	the	needs	of	a	modern	workforce.	After	careful	study	and	

Safety is at the core of everything we do, and it starts with keeping 

planning for future needs, we seized an opportunity to consolidate 

our employees healthy and injury-free. In the last few years we’ve 

two outdated resource centers into a new building with a much-

ramped up our employee safety efforts – focusing on everything from 

needed training facility. 

enhanced training to an improved recognition program for incident 

reporting. 

In October, we officially opened the new Sherwood Operations and 

Training Center, which contains a mock residential neighborhood 

One of the ways we measure employee safety is by tracking days 

that provides our field employees hands-on, scenario-based safety 

away from work due to injury along with the number of incidents 

training. 

where an employee is restricted from normal work activities. Last 

year, we lowered that average number to just two cases per 100  

Providing safe, reliable service also means making wise pipeline 

employees, down from five cases three years ago. We also improved  

investments and system improvements. In 2012, we completed  

our injury rate per employee, lowering it by more than 50 percent  

significant	pipeline	upgrades	in	our	Mid-Willamette	Valley	service	

over the last three years. While we’re proud of this progress, making 

area. These are critical infrastructure investments that significantly 

sure all our employees go home uninjured each day is work that is 

improve the reliability of our system for years to come.

never finished. 

We also made progress last year in many areas that support the 

housing market helped our customer growth rate increase to nearly  

Last year, lower prices coupled with a modest improvement in the 

safety of our system. For example, we launched a new Emergency 

1 percent. 

Contact Center dedicated exclusively to taking emergency calls day 

and night, seven days a week. We are now answering nearly every 

And	for	the	fourth	consecutive	year,	lower	natural	gas	prices	allowed	 

emergency call in less than 10 seconds – helping us improve our 

us to reduce customer rates – further strengthening our competitive 

damage and odor response times.

position against oil and electricity. In Oregon, residential customers re-

ceived about a 5 percent decrease (including adjustments from the rate 

We are proud to say that our commitment to safety and to service 

case), and Washington residential customers received an 8 percent 

across the board continues to be recognized by our customers. Last 

reduction. These rate decreases were in addition to $39 million in gas-

year we were again ranked among the top-scoring utilities in satisfac-

cost	savings	we	passed	back	to	customers	in	their	June	bills	last	year.	

tion	surveys	conducted	by	J.D.	Power	and	Associates.	Year	after	

year, consistently high residential and business satisfaction scores  

In 2012, we also continued to reap the long-term advantage of low 

demonstrate our employees take great care and pride in what they do.

natural gas prices for customers through our innovative gas reserves

UTILITy CUSTOm ERS AT yEAR-END

BARE STEEL AND CAST IRON REPLACEmENT

700,000

680,000

660,000

640,000

620,000

600,000

2008

2009

2010

2011

2012

UTILITY CUSTOMERS

We added 6,398 new customers in 2012, and now serve nearly 
686,000 customers.

l

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s

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a
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f
o

s
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l
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1,250

1,000

750

500

250

0

n
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f
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250

200

150

100

50

0

1986

1991

1996

2001

2006

2012

BARE STEEL

 CAST IRON

The company has about 17 miles of bare steel main left in our system. 
There has been no cast iron pipe in our system since 2000.

 
 
 
 
 
 
 
6

LETTER TO SHAREHOLDERS

investment with Encana. Through last year, our cumulative investment 

where they shop – in big box stores and online – and to broaden  

reached about $107 million, or about 42 percent of the approximately 

our exposure in the retail channel. Our goal is one-stop shopping for  

$250 million total investment, which we expect to complete in 2015. 

customers looking to get gas to their home, select equipment, and  

These investments are expected to provide long-term price protec-

take advantage of special offers. This year we’ll also be looking to 

tion for our utility customers. 

expand our growth efforts beyond traditional residential and commer-

opportunities abounD

cial customer markets. 

Natural gas is shaping a new energy landscape, one defined by  

We plan to explore the transportation fuel market for liquefied natural 

lower costs. In fact, our customers have seen four consecutive years 

gas	and	compressed	natural	gas.	At	half	the	cost	of	gasoline,	and	

of rate decreases and $400 million in cumulative savings. This truly  

with 30 percent lower carbon emissions, natural gas is becoming an 

is	a	“golden	age”	for	our	industry,	with	exciting	opportunities	for	the	 

important fuel for fleets, marine vessels and long-haul trucks. The 

nation and for NW Natural.

challenge is building refueling infrastructure. We are working with 

policy leaders and regulators to find new ways to support develop-

Abundant	domestic	supplies	and	lower	prices	are	creating	jobs	and	

ment as part of our basic utility services.

bringing manufacturing back to the U.S. from overseas. For the first 

time since records were kept, as much electricity is being generated 

Of course, as more natural gas is consumed for transportation and to 

with gas as with coal, which is helping bring U.S. carbon emissions 

back up renewables, we believe storage will become an increasingly 

to 20-year lows. From climate change to energy independence, the 

important asset. Last year we signed an agreement to provide  

shale gas revolution is making its mark on the nation’s future. 

Portland	General	Electric	(PGE)	with	storage	services	at	our	Mist	 

facility – an agreement that was dependent on PGE being the suc-

cessful bidder in an open process to provide flexible power generation  

to their customers. In the first quarter of 2013, PGE’s bid for that  

project was selected, and it is moving forward with plans to build  

a new generating plant at Port Westward. 

Under our agreement with PGE, NW Natural will develop a storage 

expansion	at	Mist	to	serve	this	new	plant’s	dynamic	natural	gas	

demand.	Assuming	regulatory	and	permitting	clearances	are	granted	

as planned, we believe this expansion will be online in 2016. It will 

include the development of storage wells, a compressor station,  

and additional pipeline facilities. This investment will help position  

us	for	future	growth	at	Mist.

At	Gill	Ranch,	our	underground	gas	storage	facility	in	California,	

operations are running efficiently, and we are working to expand our 

customer base and add higher-value contracts to our portfolio. We 

remain confident that storage is a good long-term investment as the 

nation moves increasingly to natural gas for power generation and 

industrial processes. 

Abundant shale gas supplies are helping to boost 
growth in our commercial and industrial markets.

NW Natural is seeing the positive impacts of this dramatic rise in 

natural gas supplies and the resulting lower prices. In less than two 

It’s that increasing dependency on gas for power generation in the 

years, 36 new, large commercial and industrial businesses signed up 

Northwest that also continues to drive the need for a new interstate 

for natural gas service in our market. In the past, the typical rate has 

transmission pipeline. Now, like never before, the natural gas and 

been about five or six a year. With our growing price advantage over 

electric systems are interconnected and interdependent. 

other fuel options, we’ll be aggressively looking for new large com-

mercial and industrial customer opportunities in 2013 and beyond.

Today during peak demand the existing interstate pipeline serving 

the Northwest is at maximum capacity. There is no question that 

We also believe there are additional opportunities in the residential 

additional pipeline capacity is essential to ensure the future reliability 

market. This year, we’ll be launching a new project to automate sev-

of the region’s gas supplies. This is why we are continuing to work 

eral components of our customer acquisition process by developing a 

with Northwest utilities and regulators to advance a new integrated, 

web-based portal accessible to customers, builders, contractors and 

regional, cross-Cascades pipeline solution. 

retailers. Our vision for this multiyear initiative is to reach customers 

LETTER TO SHAREHOLDERS

7

Natural gas has an important role to play in meeting our future 
energy needs and adequate infrastructure will be essential.

The shale gas revolution has reshaped the nation’s energy future  

and the value we provide to our customers and shareholders. Our 

and it has created exciting possibilities for NW Natural. In 2013,  

progress doesn’t always come in big leaps forward. But each year  

we’ll aggressively pursue the growth opportunities low-cost natural 

we dedicate ourselves to taking the steps necessary to make  

gas	provides.	And	we’ll	do	it	without	losing	sight	of	our	most	funda-

NW Natural a stronger company. To this end, there was progress 

mental responsibilities – delivering natural gas safely, reliably and  

in 2012 and there will be more in 2013. That is the commitment we 

with superior customer service. 

make to our customers, and to you, our shareholders. 

This year we’ll be implementing an automated incident reporting 

On behalf of NW Natural employees, thank you for your investment  

system to advance our employee safety efforts. We’ll be rolling out 

in our company. It is a privilege for all of us to work on your behalf. 

appointment windows and further improving our odor response  

times to better meet customer expectations. We’ll be focused on  

Sincerely, 

the successful completion of the remaining rate case issues, and  

we’ll continue to collaborate with state policy leaders on expanding 

natural gas use to lower carbon emissions and reduce energy  

costs to consumers. 

At	NW	Natural	we	continue	to	move	forward	with	persistence	 

and determination, grounded by the knowledge of who we are  

Gregg S. Kantor 

President and CEO

in recognition 

Russell	“Russ”	Tromley	retired	in	2012	after	 

serving 19 years on the NW Natural Board of  

Directors, most recently as Chairman of the 

Board	since	2008.	During	his	tenure,	Russ	 

drew from his extensive business experience 

and provided invaluable advice and counsel.   

His knowledge of NW Natural and his strong  

leadership skills were instrumental in many of  

the	company’s	achievements.	Russ	helped	

shape NW Natural as we know it today, and  

for that we owe him our deepest gratitude.  

 
8
8

CORPORATE OFFICERS

NW NATuRAL OFFICERS

FRONt ROW: Margaret	Kirkpatrick,	David	Anderson,	 
Gregg	Kantor	and	Lea	Anne	Doolittle.	

BAcK ROW: Grant	Yoshihara,	MardiLyn	Saathoff,	 
Alex	Miller,	David	Williams,	Keith	White	and	Stephen	Feltz.

DAVID H. ANDERSON
Executive	Vice	President 
Operations	and	Regulation	

StEpHEN p. FELtz
Senior	Vice	President	and 
Chief Financial Officer

LEA ANNE DOOLIttLE 
Senior	Vice	President 
and	Chief	Administrative	
Officer 

GREGG S. KANtOR
President and Chief  
Executive Officer

bOARD OF DIRECTORS

MARGAREt D.  
KIRKpAtRIcK
Senior	Vice	President	 
and General Counsel

MARDILyN SAAtHOFF
Vice	President	and	 
Corporate Secretary  
Legal,	Risk	and	Compliance

c. ALEx MILLER
Vice	President	 
Regulation	and	 
Treasurer

J. KEItH WHItE
Vice	President	 
Business Development  
and Energy Supply, and  
Chief Strategic Officer 

DAVID R. WILLIAMS
Vice	President	 
Utility Services 

GRANt M. yOSHIHARA
Vice	President	 
Utility Operations 

tIMOtHy p. BOyLE 
President and Chief  
Executive Officer 
Columbia Sportswear  
Company 

MARtHA L. “StORMy”  
ByORuM
Executive	Vice	President 
Stephens, Inc. 

JOHN D. cARtER
Chairman of the Board  
Schnitzer Steel  
Industries, Inc. 

MARK S. DODSON
Former Chief  
Executive Officer  
NW Natural

c. ScOtt GIBSON
President  
Gibson Enterprises 

tOD R. HAMAcHEK 
Former Chairman and 
Chief Executive Officer 
Penwest Pharmaceuticals 
Company and Chairman  
of the Board NW Natural 

GREGG S. KANtOR
President and Chief  
Executive Officer  
NW Natural

JANE L. pEVEREtt
Former President and  
Chief Executive Officer  
British Columbia  
Transmission Corporation

GEORGE J. puENtES
Former President 
Don	Pancho	Authentic	 
Mexican	Foods,	Inc.	 

KENNEtH tHRASHER
Chairman of the Board  
Compli Corporation 

 
SHAREHOLDER INFORMATION

9

notice of annual meeting

The	2013	Annual	Meeting	will	be	held	at	2	p.m.,	Thursday,	May	23,	at	the	Oregon	Convention	Center,	777	NE	Martin	Luther	King	Jr.	Blvd.,	

Portland,	Oregon	97232.	A	meeting	notice	and	proxy	statement	will	be	sent	to	all	shareholders	in	April.	If	you	plan	to	attend	the	annual	

meeting, you will need to detach and retain the admission ticket attached to your proxy card mailed to you with the notice of the annual 

meeting	and	the	proxy	statement.	As	space	is	limited,	you	may	bring	only	one	guest	to	the	meeting.	If	you	hold	your	stock	through	a	

broker, bank, or other nominee, please bring evidence to the meeting that you owned NW Natural Common Stock as of the record date, 

April	4,	2013,	and	we	will	provide	you	with	an	admission	ticket.	A	form	of	government-issued	photograph	identification	will	be	required	

to enter the meeting.

DiviDenD reinvestment anD  
Direct stock purcHase plan

contact tHe nW natural boarD

Governance	Standards;	Director	Indepen-

Concerns may be directed to the  

dence	Standards;	Code	of	Ethics;	and	Board	

Participants may make an initial investment 

nonmanagement directors by writing to  

Committee Charters. These publications, as 

in company stock and common sharehold-

NW Natural Board of Directors, c/o  

well as other filings made with the SEC, are 

ers of record may reinvest all or part of their 

Corporate Secretary.

dividends in additional shares under the 

company’s plan. Cash purchases may also 

be made. Participants in the plan bear the 

forWarD-looking  
statements

also available on our website at nwnatural.

com. Our SEC filings are also available by 

request through the SEC by mail at U.S. 

Securities and Exchange Commission, Office 

cost of brokerage fees and commissions for 

The	statements	made	in	this	Annual	Report	

of	FOIA/PA	Operations,	100	F	Street,	N.E.,	

shares purchased on the open market to 

that are not purely historical, including state-

Washington, D.C. 20549, or online at sec.gov. 

fulfill	purchases	under	the	plan.	A	prospectus	

ments regarding strategy, growth, future 

You	can	obtain	information	about	access	 

will be sent upon request. 

demand for gas, commodity costs, revenues, 

to	the	Public	Reference	Room	and	how	to	

gas supplies and reserves, investments and 

access or request records by calling the  

returns, price protection, business develop-

SEC at (202) 551-8090.

scHeDuleD DiviDenD  
payment Dates

February 15, 2013

May	15,	2013

August	15,	2013

November 15, 2013

certifications

ment, project timelines, pipeline development, 

replacement and safety programs, system 

reliability, storage performance and storage 

values, pension deferrals, governmental 

policy legislation, regulatory cost recovery 

mechanisms, prudence reviews, and regula-

tory proceedings and actions, economic 

The Chief Executive Officer certified to the 

factors, market trends and the competitive 

NYSE	on	June	14,	2012	that,	as	of	that	date,	

environment are forward-looking statements 

he was not aware of any violation by the 

within	the	“safe	harbor”	provisions	of	the	

company	of	NYSE’s	corporate	governance	

Private	Securities	Litigation	Reform	Act	of	

listing standards, and the company had filed 

1995. NW Natural’s actual results could differ 

with the Securities and Exchange Commis-

materially from those anticipated in these  

sion (SEC), as exhibits 31.1 and 31.2 to its 

forward-looking statements as a result of risks 

Annual	Report	on	Form	10-K	for	the	year	

and uncertainties, including those described 

ended December 31, 2011, the certificates 

in the attached report on Form 10-K.

of the Chief Executive Officer and the Chief 

Financial Officer of the company certifying 

For a more complete description of these 

the quality of the company’s public disclo-

risks and uncertainties, please refer to our fil-

sure. For the year ended December 31, 

ings with the SEC on Forms 10-K and 10-Q.

2012, the certificates of the Chief Executive 

Officer and Chief Financial Officer are  

request for publications

attached as exhibits 31.1 and 31.2 to the 

The following publications may be obtained 

Form	10-K	included	in	this	Annual	Report.

without charge by contacting the Corporate 

Secretary	at	NW	Natural’s	address:	Annual	

Report;	Form	10-K;	Form	10-Q;	Corporate	

COmPARISON OF FIVE-yEAR 
CUmULATIVE TOTAL RETURN

(based on $100 invested on 12/31/07)

$120

$100

$80

$60

$40

2007 

2008 

2009 

2010 

2011 

2012 

NWN 

S&P UTILITIES INDEX 

S&P 500 INDEX 

Total shareholder return (annualized) over the five 
years ending December 31, 2012 for NW Natural was 
1.6%, compared to Standard & Poor’s (S&P) Utilities 
Index return of negative 1.1%, and the S&P 500  
Index return of negative 0.7%. In 2011, the S&P 
Small Cap 600 Index was also presented, which 
had a return of 3.5% for the same five-year period 
presented above. The S&P Small Cap 600 Index was 
replaced with the broader S&P 500 Index comparison 
as it is more indicative of overall market performance.  

 
10 LIVING Ou R MISSION & VALu ES

our mission:

our core values:

We provide safe, reliable  
and affordable energy   
in an environmentally responsible way  
to better the lives  
of the public we serve.

integrity
Safety   
Service Ethic  
CARING
Environmental Stewardship

Produced by NW Natural’s corPorate commuNicatioNs

pHoto creDits

Cover - Gill Ranch: Robbie McClaran; Service Technichian: Corky Miller; Sherwood Facility: Jeff Lee.

Page 3 - Gregg Kantor: Jeff Lee. 

Page 4 - Call Center: Corky Miller.

Page 7 - Russell Tromley: Robbie McClaran.

Page 8 - NW Natural Officers and Board of Directors: Robbie McClaran.

Inside Back Cover - Robert Hess and Chu Lee: Robbie McClaran; Family Picnic: Dale Headrick.

Design

Magneto Brand Advertising

printing

RR Donnelley

Form 10-K
Annual Report

UNITED STATES
SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549
FORM 10-K

(Mark One)
[X]       ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

For the fiscal year ended December 31, 2012
OR

[  ]       TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

For the transition period from ___________ to____________
Commission file number 1-15973

NORTHWEST NATURAL GAS COMPANY
(Exact name of registrant as specified in its charter) 

 Oregon 

(State or other jurisdiction of    

incorporation or organization)  

93-0256722

(I.R.S. Employer

Identification No.)

220 N.W. Second Avenue, Portland, Oregon 97209
(Address of principal executive offices)  (Zip Code)
Registrant’s telephone number, including area code:  (503) 226-4211

Securities registered pursuant to Section 12(b) of the Act:
Title of each class                                                                                   Name of each exchange on which registered
Common Stock                                                                                       New York Stock Exchange
Securities registered pursuant to Section 12(g) of the Act:  None.

Indicate by check mark if the registrant is a well-known seasoned issuer, as defined in Rule 405 of the Securities Act.

Yes  [ X ]    No  [    ]

Indicate by check mark if the registrant is not required to file reports pursuant to Section 13 or Section 15(d) of the Act.

Yes  [   ]    No  [ X ]

Indicate by check mark whether the registrant (1) has filed all reports required to be filed by Section 13 or 15(d) of the 
Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the registrant was required to 
file such reports), and (2) has been subject to such filing requirements for the past 90 days.  
Yes  [ X ]    No  [    ]

Indicate by check mark whether the registrant has submitted electronically and posted on its corporate Web site, if any, every 

Interactive Data File required to be submitted and posted pursuant to Rule 405 of Regulation S-T (§232.405 of this chapter) 
during the preceding 12 months (or for such shorter period that the registrant was required to submit and post such files).   
Yes [ X ]     No  [   ]

Indicate by check mark if disclosure of delinquent filers pursuant to Item 405 of Regulation S-K (§229.405) is not contained 
herein, and will not be contained, to the best of registrant’s knowledge, in definitive proxy or information statements incorporated 
by reference in Part III of this Form 10-K or any amendment to this Form 10-K. 

[ X ]
Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, or a 
smaller reporting company.  See the definitions of “large accelerated filer,” “accelerated filer” and “smaller reporting company” in 
Rule 12b-2 of the Exchange Act.  (Check one):

Large Accelerated Filer [ X ]                                                                      Accelerated Filer [    ]
Non-accelerated Filer [    ]                                                                         Smaller Reporting Company [    ]
Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Exchange Act).

Yes  [   ]    No  [ X ]

As of June 30, 2012, the registrant had 26,827,437 shares of its Common Stock outstanding.  The aggregate market value of 

these shares of Common Stock (based upon the closing price of these shares on the New York Stock Exchange on that date) 
held by non-affiliates was $1,261,935,437.

At February 22, 2013, 26,937,683 shares of the registrant’s Common Stock (the only class of Common Stock) were 

outstanding.

Portions of the Proxy Statement of the registrant, to be filed in connection with the 2013 Annual Meeting of Shareholders, are 
incorporated by reference in Part III.

DOCUMENTS INCORPORATED BY REFERENCE

NORTHWEST NATURAL GAS COMPANY
Annual Report to Securities and Exchange Commission on Form 10-K
For the Fiscal Year Ended December 31, 2012

TABLE OF CONTENTS

PART I

Glossary of Terms

Forward-Looking Statements

Item 1.

Business

Overview

Business Model

Local Gas Distribution

Gas Storage

Other

Environmental Issues

Employees

Additions to Infrastructure

Executive Officers of the Registrant

Available Information

Item 1A. Risk Factors

Item 1B. Unresolved Staff Comments

Properties

Legal Proceedings

Mine Safety Disclosures

Item 2.

Item 3.

Item 4.

PART II

Item 5.

Market for the Registrant’s Common Equity, Related Stockholder Matters and Issuer

Item 6.

Item 7.

Purchases of Equity Securities

Selected Financial Data

Management’s Discussion and Analysis of Financial Condition and Results of Operations

Item 7A. Quantitative and Qualitative Disclosures About Market Risk

Item 8.
Item 9.

Financial Statements and Supplementary Data

Changes in and Disagreements with Accountants on Accounting and Financial Disclosure

Item 9A. Controls and Procedures

Item 9B. Other Information

PART III

Item 10. Directors, Executive Officers and Corporate Governance

Item 11.
Item 12.

Executive Compensation

Security Ownership of Certain Beneficial Owners and Management and Related Stockholder Matters

Item 13. Certain Relationships and Related Transactions, and Director Independence

Item 14.

Principal Accountant Fees and Services

PART IV  

Item 15.

Exhibits and Financial Statement Schedules

SIGNATURES

Page

1

2

3

3

3

3

8

10

11

11

12

12

12

13

20

20

20

20

21

22

23

47

49

82

82

82

83

83

84

84

84

85

86

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
LIQUEFIED NATURAL GAS (LNG): the cryogenic liquid form of 
natural gas. To reach a liquid form at atmospheric pressure, 
natural gas must be cooled to approximately negative 260 
degrees Fahrenheit.

PURCHASED GAS ADJUSTMENT (PGA): a regulatory 
mechanism which adjusts customer rates to reflect changes 
in the forecasted cost of gas and differences between 
forecasted and actual gas costs from the prior year.

RETURN ON EQUITY (ROE): a measure of corporate 
profitability, calculated as net income divided by average 
common stock equity. Authorized ROE refers to the equity 
rate approved by a regulatory agency for utility investments 
funded by common stock equity.

SALES SERVICE: service provided whereby a customer 
purchases both natural gas commodity supply and 
transportation from the utility.

SITE REMEDIATION AND RECOVERY MECHANISM (SRRM): a 
rate mechanism for recovering prudently incurred 
environmental site remediation costs through customer 
billings, subject to an earnings test. 

THERM: the basic unit of natural gas measurement, equal to 
100,000 Btu’s.

TRANSPORTATION SERVICE: service provided whereby a 
customer purchases natural gas commodity directly from a 
supplier but pays the utility to transport the gas over its 
distribution system to the customer’s facility.

UTILITY MARGIN: a financial measure consisting of utility 
operating revenues less the associated cost of gas.

WEATHER NORMALIZATION: a rate mechanism applied to 
residential and commercial customers’ bills to adjust for 
temperature variances from average weather, with rate 
decreases when the weather is colder than average and 
rate increases when the weather is warmer than average.

GLOSSARY OF TERMS

AVERAGE WEATHER: equal to the 25-year average degree 
days based on temperatures established in our last Oregon 
general rate case.

Bcf: one billion cubic feet, a volumetric measure of natural 
gas, roughly equal to 10 million therms.

Btu: British thermal unit, a basic unit of thermal energy 
measurement. One Btu equals the energy required to raise 
one pound of water one degree Fahrenheit at atmospheric 
pressure and 60 degrees Fahrenheit. One hundred 
thousand Btu’s equal one therm.

CORE UTILITY CUSTOMERS: residential, commercial and 
industrial customers receiving firm service from the utility.

COST OF GAS: the delivered cost of natural gas sold to 
customers, including the cost of gas purchased or 
withdrawn/produced from storage inventory or reserves, 
gains and losses from gas commodity hedges, pipeline 
demand costs, seasonal demand cost balancing 
adjustments, regulatory gas cost deferrals and company 
gas use.

DECOUPLING: a rate mechanism, also referred to as our 
conservation tariff, which is designed to break the link 
between earnings and the quantity of natural gas consumed 
by customers. The design is intended to allow the utility to 
encourage customers to conserve energy while not 
adversely affecting its earnings due to reductions in sales 
volumes.

DEGREE DAYS: units of measure that reflect temperature-
sensitive consumption of natural gas, calculated by 
subtracting the average of a day’s high and low 
temperatures from 65 degrees Fahrenheit.

DEMAND COST: a component in core utility customer rates 
that covers the cost of securing firm pipeline capacity to 
meet peak demand, whether that capacity is used or not.

FIRM SERVICE: natural gas service offered to customers 
under contracts or rate schedules that will not be disrupted 
to meet the needs of other customers, particularly during 
cold weather.

GENERAL RATE CASE: a periodic filing with state or federal 
regulators to establish billing rates for all classes of utility 
customers.

GENERALLY ACCEPTED ACCOUNTING PRINCIPLES (GAAP): 
accounting principles generally accepted in the United 
States of America.

INTERRUPTIBLE SERVICE: natural gas service offered to 
customers (usually large commercial or industrial users) 
under contracts or rate schedules that allow for interruptions 
when necessary to meet the needs of firm service 
customers.

1

Forward-looking statements are based on our current 
expectations and assumptions regarding our business, the 
economy and other future conditions. Because forward-
looking statements relate to the future, they are subject to 
inherent uncertainties, risks and changes in circumstances 
that are difficult to predict. Our actual results may differ 
materially from those contemplated by the forward-looking 
statements. We therefore caution you against relying on any 
of these forward-looking statements. They are neither 
statements of historical fact nor guarantees or assurances 
of future performance. Important factors that could cause 
actual results to differ materially from those in the forward-
looking statements are discussed at Item 1A., “Risk Factors” 
of Part I and Item 7. and Item 7A., “Management’s 
Discussion and Analysis of Financial Condition and Results 
of Operations” and “Quantitative and Qualitative Disclosures 
About Market Risk,” respectively, of Part II of this report.

Any forward-looking statement made by us in this report 
speaks only as of the date on which it is made. Factors or 
events that could cause our actual results to differ may 
emerge from time to time, and it is not possible for us to 
predict all of them. We undertake no obligation to publicly 
update any forward-looking statement, whether as a result 
of new information, future developments or otherwise, 
except as may be required by law.

FORWARD-LOOKING STATEMENTS 

This report contains “forward-looking statements” within the 
meaning of the U.S. Private Securities Litigation Reform Act 
of 1995. Forward-looking statements can be identified by 
words such as “anticipates,” “intends,” “plans,” “seeks,” 
“believes,” “estimates,” “expects” and similar references to 
future periods. Examples of forward-looking statements 
include, but are not limited to statements regarding the 
following: 
plans;
• 
objectives;
• 
goals;
• 
strategies;
• 
assumptions and estimates;
• 
future events or performance;
• 
trends;
• 
cyclicality;
• 
earnings and dividends;
• 
growth;
• 
customer rates;
• 
commodity costs;
• 
gas reserves;
• 
operational performance and costs;
• 
efficacy of derivatives and hedges;
• 
liquidity and financial positions;
• 
project development and expansion;
• 
competition;
• 
procurement and development of gas supplies;
• 
estimated expenditures;
• 
costs of compliance;
• 
credit exposures;
• 
potential efficiencies;
• 
rate recovery and refunds;
• 
impacts of laws, rules and regulations;
• 
tax liabilities or refunds;
• 
outcomes and effects of litigation, regulatory actions, and 
• 
other administrative matters;
projected obligations under retirement plans;
availability, adequacy, and shift in mix, of gas supplies;
approval and adequacy of regulatory deferrals; and
environmental, regulatory, litigation and insurance costs 
and recoveries.

• 
• 
• 
• 

2

 
NORTHWEST NATURAL GAS 
COMPANY
PART I

ITEM 1. BUSINESS

OVERVIEW

Northwest Natural Gas Company (NW Natural or the 
Company) was incorporated under the laws of Oregon in 
1910. Our company and its predecessors have supplied gas 
service to the public since 1859, and we have been doing 
business as NW Natural since 1997. We maintain 
operations in Oregon, Washington and California and 
conduct businesses through NW Natural and its 
subsidiaries. References in this discussion to "Notes" are 
the Notes to Consolidated Financial Statements in Item 8 of 
this report.

BUSINESS MODEL

Our business model primarily consists of two core 
businesses: local gas distribution, referred to as our "utility" 
business segment, which serves residential, commercial, 
and industrial customers in Oregon and southwest 
Washington; and gas storage, referred to as our "gas 
storage" business segment, which serves utilities, gas 
marketers, electric generators, and large industrial users. 
The utility business represents approximately 90% of our 
consolidated assets and net income, while our gas storage 
business accounts for a majority of the remaining 10%. We 
also have other business and investment activities, which 
we aggregate and refer to as our "other" segment and which 
accounts for less than 1% of consolidated assets and net 
income. We refer to our “gas storage” and “other” business 
segments as “non-utility.”   

Local Gas Distribution "Utility" 
We are principally engaged in the distribution of natural gas 
in Oregon and southwest Washington, which involves the 
following activities:
• 

building and maintaining a safe and reliable pipeline 
distribution system; 
purchasing gas from producers and marketers; 
contracting for the upstream transportation of gas over 
pipelines from regional supply basins into our service 
territory;
reselling gas commodity to customers subject to rates, 
terms and conditions approved by the Public Utility 
Commission of Oregon (OPUC) or by the Washington 
Utilities and Transportation Commission (WUTC); and 
transporting gas commodities owned by customers 
from an interstate pipeline connection, or city gate, to 
the customers' facilities for a fee.

• 
• 

• 

• 

Our exclusive service area as allocated to us by the OPUC 
includes a major portion of western Oregon, including the 
Portland metropolitan area, most of the Willamette Valley, 
and the coastal area from Astoria to Coos Bay. The Portland 
metropolitan area is the principal retail and manufacturing 
center in the Columbia River Basin and is a major port for 
trade with Asia. 

3

We also hold certificates from the WUTC granting us 
exclusive rights to serve portions of three southwest 
Washington counties bordering the Columbia River. We 
provide gas service in 125 cities and neighboring 
communities in 15 Oregon counties, as well as in 16 cities 
and neighboring communities in three Washington counties. 

We serve residential, commercial and industrial customers 
in these service areas. Industries we serve include: pulp, 
paper and other forest products; the manufacture of 
electronic, electrochemical and electrometallurgical 
products; the processing of farm and food products; the 
production of various mineral products; metal fabrication 
and casting; the production of machine tools, machinery and 
textiles; the manufacture of asphalt, concrete and rubber; 
printing and publishing; nurseries; government and 
educational institutions; and electric generation. No 
individual customer or industry accounts for a significant 
portion of our utility revenues.

In these service areas, we have no direct competition from 
other natural gas distributors. However, each customer 
class (i.e. residential, commercial and industrial) is subject 
to indirect competition. For residential customers, we 
compete primarily with electricity, fuel oil, propane and 
renewable energy providers. We also compete with 
electricity, fuel oil, propane, and renewable energy for small 
to mid-size commercial customers. In the industrial and 
large commercial markets, we compete with all forms of 
energy, including competition from wholesale natural gas 
marketers. Competition among energy suppliers is based on 
price, efficiency, reliability, performance, market conditions, 
technology, legislative policy, and environmental impact. 

At December 31, 2012, we had approximately 686,000 
utility customers, consisting of 621,000 residential, 64,000 
commercial and 1,000 industrial customers. Approximately 
90% of our utility customers are located in Oregon, and 10% 
are located in Washington. On an annual basis, residential 
and commercial customers typically account for about 50% 
to 60% of our utility’s total volumes delivered and about 
80% to 90% of our utility margin, while industrial customers 
account for the remaining 40% to 50% of volumes and 
about 5% to 15% utility margin. The remaining 10% or less 
of utility margin is derived from miscellaneous services, 
gains or losses from an incentive gas cost sharing 
mechanism and other service fees.

In 2012 we experienced a net increase in residential 
customers of 5,729 primarily from single- and multi-family 
new construction, and from the conversion of existing 
homes from oil, electric and propane. The net increase of all 
new customers added in 2012 was 6,398. This represents a 
12-month growth rate of 0.9%, which is up slightly from 
2011 but below historical growth rates due to the 
economy. We estimate that natural gas is in less than 60% 
of residential single-family dwellings in our service territory. 
With natural gas' price advantage, operating convenience, 
and environmental benefits over fuel oil, we believe there is 
the potential for continued growth in residential and 
commercial conversions for many years.

See Note 4 for information on the utility's assets and results 
of operations.

  
  
 
Regulation and Rates
The utility is subject to regulation with respect to, among 
other matters, rates we charge to utility customers and 
systems of accounts by State commissions, which include 
the OPUC and WUTC, as well as the Federal Energy 
Regulatory Commission (FERC). Among other matters, the 
OPUC and WUTC also regulate NW Natural's issuance of 
securities. 

In order to establish approved rates with the commissions, 
we file general rate cases and rate tariff requests 
periodically. It is through these requests that the 
commission approves our authorized return on equity 
(ROE), an overall rate of return on rate base (ROR), the 
utility's capital structure, and other revenue/cost deferral 
and recovery mechanisms, such as our Purchased Gas 
Adjustment (PGA), Weather Normalization Tariff, 
Decoupling, System Integrity Program (SIP), Pension Cost 
Deferral (Pension Balancing), and environmental Site 
Remediation and Recovery Mechanism (SRRM).

In addition, under our Mist interstate storage certificate with 
the FERC, the utility is required to file either a petition for 
rate approval or a cost and revenue study every five years 
to change or justify maintaining the existing rates for the 
interstate storage service. The last such filing was made in 
2008. The next filing is due by December 2013.

The utility's most recent general rate case in Oregon was 
effective November 1, 2012 and its most recent general rate 
case in Washington was effective January 1, 2009. As a 
result of these most recent rate cases, our current approved 
rates and recovery mechanisms for each service area 
include:

Authorized Rate Structure:

ROE

ROR

Oregon

Washington(1)

9.5%

7.8%

10.1%

8.4%

Debt/Equity Ratio

50%/50%

49%/51%

X

Key Regulatory Mechanisms(2):

PGA

Incentive Sharing

Weather Normalization Tariff

Decoupling

SIP

Pension Balancing

SRRM

X

X

X

X

X

X

X

(1)Although we do not have the same specific regulatory 
mechanisms in Washington, we do have approved regulatory 
deferral orders which allow us to defer certain costs for future 
recovery through the PGA or future general rate cases, such as our 
environmental cost deferral order. 
(2)See additional details on each rate mechanism in Part II, Item 7, 
“Results of Operations—Regulatory Matters,” and “Gas Storage,” 
below.

In our most recent general rate case, the OPUC decided 
that several items would be resolved in separate 
proceedings, including the Commission's review of: 

4

recovery of working gas inventory carrying costs; the 
definition of the earnings test and a prudence review under 
SRRM; pension cost recovery specifically related to prepaid 
pension assets; and the Commission's review of our 
revenue-sharing arrangement on the utility's interstate 
storage and asset management activities. 

Authorized rates and allowed recovery mechanisms provide 
our utility business the opportunity to recover prudently 
incurred capital and operating costs from customers, while 
also earning a reasonable return on investment for 
investors. In general, these rates and regulatory 
mechanisms do not provide for the utility to earn a profit or 
incur a loss on our gas commodity purchases. This means 
gas commodity purchase costs are generally a pass-
through cost in customer rates, with the exception of our 
incentive cost sharing mechanism in Oregon. Under this 
mechanism, we can either increase or decrease margin 
revenues based on higher or lower actual gas purchase 
costs compared to gas purchase costs embedded in the 
PGA and our gas reserve investment. We can earn an 
authorized return on the equivalent rate base investment on 
our gas reserves.

The pass-through of gas commodity purchase costs in 
customer rates also means that for our industrial and large 
commercial customers, margin is not materially affected by 
whether we sell them gas commodity as part of the utility 
service or only provide them with utility transportation 
services because they purchase the gas commodity directly 
from a marketer or supplier. 

In addition to being able to select sales or transportation 
only service from the utility, our industrial and large 
commercial customers may select between firm and 
interruptible service levels. These choices can positively or 
negatively affect margin. Rates for firm service generally 
have higher profit margins for the utility than interruptible 
service. Prices in the natural gas commodity markets, along 
with the availability of pipeline capacity to ship customer-
owned gas, are among the primary factors that cause 
industrial customers to choose between sales and 
transportation service or between higher and lower levels of 
service. 

Our industrial tariffs include terms which are intended to 
give us more certainty so that we can manage the level of 
gas supplies we will need to purchase in order to serve this 
customer group. These terms include an annual election 
cycle period, special pricing provisions for out-of-cycle 
changes, and the requirement that industrial customers on 
our annual PGA sales rate must complete the agreed upon 
term of their service before switching to a new service. In 
the case of customers switching out-of-cycle from 
transportation to sales service, the customer may be 
charged the incremental cost of gas supply in accordance 
with our regulatory tariffs.

We have designed custom transportation service 
agreements with several of our largest industrial 
customers. These agreements are primarily designed to 
provide transportation rates that are competitive with the 
customer’s alternative capital and operating costs of 
installing direct pipeline connections to upstream interstate 
pipeline system, which would allow them to bypass our local 

gas distribution system. These agreements generally 
prohibit bypass during their terms. Due to the cost 
pressures that confront a number of our largest customers 
competing in global markets, bypass continues to be a 
competitive threat. Although we do not expect a significant 
number of our large customers to bypass our system in the 
foreseeable future, we may experience further deterioration 
of margin associated with customers transferring to special 
contracts where pricing is specifically designed to be 
competitive with their bypass alternative.

Gas Supply
The utility's gas supply strategy is to secure sufficient 
supplies of natural gas to meet the needs of our customers 
and to hedge gas prices so that we can effectively manage 
costs, reduce price volatility and maintain a competitive 
advantage. We have a diverse portfolio of short-, medium- 
and long-term firm gas supply contracts that are 
supplemented with gas from storage facilities either owned 
by us or contractually committed to us during periods of 
peak demand.

To execute our strategy we forecast customer requirements 
by considering estimated load growth and sensitivity 
analyses based on factors such as weather variations and 
price elasticity effects. 

We also employ a gas purchasing strategy that includes:
• 
• 

diverse sources of supply;
diverse portfolio of contract durations and types, 
including both physical and financial contracts;
strategic use of gas storage facilities and capacity recall 
agreements; and
a variety of gas cost management strategies

• 

• 

DIVERSITY OF SUPPLY SOURCES. We purchase our gas 
supplies primarily at liquid trading points to facilitate 
competition and price transparency. These trading points 
include the NOVA Inventory Transfer (NIT) point in Alberta, 
Canada (also referred to as AECO), Huntingdon/Sumas and 
Station 2 in British Columbia, Canada, and multiple receipt 
points in the U.S. Rocky Mountains. Currently, about 71% of 
our supply comes from Canada, with the balance coming 
primarily from the U.S. Rocky Mountain region. We believe 
that gas supplies available in the western United States and 
Canada are adequate to serve our core utility requirements 
for the foreseeable future, but we continue to evaluate our 
long-term supply mix based on projections of gas production 
and pricing in the U.S. Rocky Mountain regions as well as 
other regions in North America. We believe that the cost of 
natural gas coming from western Canada and the U.S. 
Rocky Mountain regions will continue to track with broader 
U.S. market prices. Additionally, we have seen increased 
availability of gas supplies throughout North America as a 
result of the extraction of shale gas and the building of new 
transmission pipeline projects to increase capacity out of the 
U.S. Rocky Mountain region.

DIVERSE PORTFOLIO OF CONTRACT TYPES AND 
DURATIONS. Our diverse portfolio of firm gas supply 
contracts typically includes gas purchase contracts for:
• 
• 

year-round baseload supply;
additional baseload supply for the winter heating 
season;

5

• 

• 

seasonal contracts where we have an option to call on 
additional supplies on a daily basis during the winter 
heating season; and
daily or monthly spot purchases.

At December 31, 2012, we have contracts with gas 
suppliers for deliveries ranging from three months to three 
years, which provide for a maximum of 2.1 million therms of 
firm gas per day during the winter heating season and 0.6 
million therms per day year-round. In addition, we have 
another 1.2 million therms per day of firm gas supplies 
whereby we can purchase supplies for delivery to our 
system during the winter heating season. During 2012, we 
purchased a total of 733 million therms under contracts with 
durations outlined in the chart below.

Contract Duration (primary term)

Long-term (one year or longer)

Short-term (more than one month, less than one
year)

Spot (one month or less)

Total

Percent of 
Purchases

34%

21

45

100%

We typically renew or replace our gas supply contracts with 
new agreements from existing and new suppliers. Aside 
from the asset management of our core utility gas supplies 
by an independent energy marketing company, no individual 
supplier provided more than 10% of our supply 
requirements. Firm year-round supply contracts have 
remaining terms ranging from one to three years. Currently, 
all firm gas supply contracts use price formulas tied to 
monthly index prices. See “Gas Cost Management Strategy
—Asset management,” below.

In addition to our year-round contracts, we continue to 
contract in advance for firm gas supplies to be delivered 
only during the winter heating season. During 2012, new 
short-term purchase contracts were entered into with 18 
suppliers, which in addition to our year- round contracts 
provide for a total of up to 2.1 million therms per day. We 
intend to enter into new purchase contracts during 2013 for 
roughly the same volume of gas with existing or new 
suppliers, as needed, to replace contracts that will expire in 
2013.

We also buy gas on the spot market as needed to meet 
utility customer demand. We have flexibility under the terms 
of some firm supply contracts, to purchase spot gas in lieu 
of the firm contract volumes thereby allowing us to take 
advantage of more favorable pricing on the spot market 
from time to time.

A small volume of gas is also purchased from a non-
affiliated producer in the Mist gas field in Oregon. Current 
production supplies are less than 1% of our total annual 
purchase requirements. Production from these wells varies 
as existing wells are depleted and new wells are drilled.

STRATEGIC USE OF GAS STORAGE AND CAPACITY RECALL. 
We supplement our firm gas supply purchases with gas 
withdrawals from storage facilities we own or that are 
contractually committed to us. Gas is generally purchased 
and injected into storage during periods of low demand so 
that it can be withdrawn for use at a later time during 

  
periods of peak demand. In addition to enabling us to meet 
our peak demand, these facilities make it possible to lower 
the annual average cost of gas by allowing us to minimize 
our pipeline capacity demand costs and to purchase gas for 
storage during the summer months when gas prices are 
generally lower.

Underground storage. A portion of our daily and seasonal 
peaking supplies to core utility customers are from our 
underground gas storage facility in the Mist gas storage 
field. This facility has a maximum daily deliverability of 5.2 
million therms and a total working gas capacity of about 16 
Bcf, which includes the capacity reserved for core utility 
customers as well as the capacity used for non-utility 
service. Under our regulatory agreement with the OPUC, 
non-utility gas storage at Mist can be developed in advance 
of core utility customer needs, but it is subject to recall by 
the utility when needed to serve utility customers as utility 
demand increases. Storage capacity recalled by the utility is 
added to utility rate base at net book value and tracked into 
utility rates in the annual PGA filing immediately following 
the recall, so there is minimal regulatory lag in cost 
recovery. In May 2012, a total of 150,000 therms per day of 
Mist storage capacity that had previously been available for 
non-utility interstate services was recalled and committed to 
use for core utility customers. Similarly in May 2011, a total 
of 100,000 therms per day of Mist storage capacity was 
recalled for core utility customer use. There was no Mist 
recall in 2010. The core utility currently has 2.8 million 
therms per day of deliverability and approximately 10.0 Bcf 
of working gas capacity available at the Mist storage facility.

We also have contracts with Northwest Pipeline, a 
subsidiary of The Williams Companies, for firm gas storage 
at the Jackson Prairie underground facility near Chehalis, 
Washington, which provides us with daily firm deliverability 
of about 0.5 million therms and total seasonal capacity of 
about 1.1 Bcf. Separate contracts with Northwest Pipeline 
provide for the transportation of these storage supplies to 
our service territory. All of these contracts have reached the 
end of their primary terms, but we have exercised our 
renewal rights that allow for annual extensions at our option.

In addition, we also contract for underground storage 
service in Alberta, Canada for amounts totaling just under 2 
Bcf. This supply will displace equivalent volumes of spot 
purchases in Alberta as it uses the same pipeline 
transportation for delivery from Alberta to our local gas 
distribution system. While this supply helps manage price 
risks, it does not add to our total peak day resources.

Liquefied Natural Gas (LNG) storage. We own and operate 
two LNG storage facilities in our Oregon service territory 
that liquefy gas for storage during off-peak months so that it 
is available for withdrawal during periods of peak demand. 
These two facilities provide a maximum combined daily 
deliverability of 1.8 million therms and a total seasonal 
capacity of 1.5 Bcf. In addition, we have a contract for firm 
gas storage from an LNG facility in Plymouth, Washington, 
which provides us with daily firm deliverability of about 0.6 
million therms and total seasonal capacity of about 0.5 Bcf.

Capacity recall from transportation customers. We also have 
contracts with one electric generator and two industrial 

customers that together provide 390,000 therms per day of 
recallable pipeline capacity and supply.

GAS COST MANAGEMENT STRATEGY. The cost of gas sold 
to utility customers primarily consists of:
• 
• 

purchase price paid to suppliers; 
charges paid to pipeline companies to store and 
transport gas to our distribution system; and 
gains or losses related to gas commodity hedge 
contracts, including our gas reserves contract, entered 
into in connection with the purchase of gas for core 
utility customers.

• 

Recent developments in drilling technologies have 
increased access to gas supplies in shale gas formations 
around the U.S. and Canada, the current outlook for North 
American natural gas supplies is strong and is projected to 
remain this way well into the future. 

We are charged pipeline transportation rates by Canadian 
pipelines and U.S. interstate pipeline transportation service 
providers. These rates periodically change when the 
Canadian pipelines and U.S. interstate pipelines file for rate 
change approval from the Canadian National Energy Board 
or FERC, as applicable. Settlement was recently reached 
on a Northwest Pipeline rate case and new rates went into 
effect beginning January 1, 2013. Pipeline transportation 
rate increases or decreases are generally passed on to our 
customers through annual PGA updates.

We employ a number of strategies to mitigate the cost of 
gas sold to utility customers. Our primary strategies for 
managing gas commodity price risk include:
• 
• 

negotiating fixed prices directly with gas suppliers;
negotiating financial derivative contracts that effectively 
convert floating index prices in physical gas supply 
contracts to fixed prices (referred to as commodity price 
swaps);
negotiating financial derivative contracts that effectively 
set a ceiling or floor price, or both, on floating index 
priced physical supply contracts (referred to as 
commodity price options such as calls, puts, and 
collars);
buying physical gas supplies at a set price and injecting 
it into storage for price stability;
investing in gas reserves for longer term price stability; 
and
using an asset management service provider to 
produce incremental revenues that are used to reduce 
our utility’s net cost of gas.

• 

• 

• 

• 

Financial derivative instruments. We hedge a majority of our 
firm year-round supply contracts each year using financial 
derivative instruments as a key component of our gas 
purchasing strategy. Our financial hedge contracts make up 
a majority of our commodity price hedging activity, and 
these contracts are with a number of investment-grade 
credit counterparties, typically with credit ratings of AA- or 
higher. Under our financial hedge policy, we enter into 
commodity swaps, puts, calls and collars with terms 
generally ranging anywhere from one month to five years. 
See Part II, Item 7A, “Quantitative and Qualitative 
Disclosures About Market Risk—Credit Risk—Credit 
exposure to financial derivative counterparties.”

6

 
 
  
Gas reserves. We entered into agreements with Encana Oil 
& Gas (USA) Inc. (Encana) which provide us a long-term 
fixed price hedge that is backed with physical supplies. 
These agreements are intended to provide long-term price 
protection for our utility customers. Our investment in these 
gas field interests are rate base investments that are part of 
our annual Oregon PGA filing, which is subject to incentive 
sharing and allows us to recover our costs through 
customer rates in a manner previously approved by the 
OPUC. This transaction acted to hedge the cost of gas for 
approximately 4% of our gas supplies for the year-ended 
December 31, 2012. 

Asset management. We use our gas supply, storage and 
transportation flexibility to capture opportunities that emerge 
during the course of the year for gas purchases, sales, 
exchanges or other means to manage net gas costs. In 
particular, our Mist underground storage facility provides 
flexibility to manage net gas costs. In addition to maximizing 
the value of our gas storage and pipeline capacity, we 
contract with an independent energy marketing company 
that manages our unused capacity when those assets are 
not serving the needs of our core utility customers. Our 
asset management activities provide cost savings that 
reduce our utility’s cost of gas, and generate incremental 
revenues from a regulatory incentive-sharing mechanism, 
which are included in our gas storage business segment.

GAS DISTRIBUTION OPERATIONS. The goals of our gas 
distribution operations are:
• 

SAFETY – Building and maintaining a safe pipeline 
distribution system;

• 

•  RELIABILITY – Ensuring gas resource portfolios that 
are sufficient to satisfy customer requirements under 
extremely cold weather conditions;
LOWEST REASONABLE COST – Acquiring gas 
supplies at the lowest reasonable cost for utility 
customers;
PRICE STABILITY – Managing commodity price 
volatility by making the best use of physical assets and 
financial instruments; and

• 

•  COST RECOVERY – Managing gas purchase costs 

prudently to minimize risks associated with regulatory 
review and cost recovery.

Safety. Safety and the protection of our employees, our 
customers and the public at large are and will remain a top 
priority. We monitor and maintain our pipeline distribution 
system and storage operations with the goal of ensuring 
that natural gas is stored and delivered safely, reliably and 
efficiently. We have had various cost recovery mechanisms 
since 2004 and currently have a program which integrates 
the Company’s bare steel replacement, transmission 
pipeline integrity management, and distribution pipeline 
integrity management programs into a single program. In 
response to the recent pipeline incidents involving other 
companies, natural gas distribution businesses are likely to 
be subject to even greater federal and state regulation in the 
future. The “Pipeline Safety, Regulatory Certainty, and Job 
Creation Act of 2011” signed into law in early 2012, includes 
several new safety initiatives including:
• 

an analysis of the appropriateness of automatic or 
remote shut-off valves on new and replaced gas 
transmission lines; 

7

• 

• 

an evaluation of the benefits of expanding transmission 
integrity management regulations to additional 
pipelines; and
requirements for operators to reverify the maximum 
allowable operating pressures for transmission 
pipelines.  

We continue to work diligently with industry associations as 
well as federal and state regulators to ensure the safety of 
our system and ensure compliance with new laws and 
regulations. We expect that costs associated with 
compliance to federal, state and local rules would be 
recoverable in rates.

Reliability. The effectiveness of our gas distribution program 
ultimately rests on whether we provide reliable service at a 
reasonable cost to our core utility customers. To ensure our 
effectiveness, we develop a composite design year, 
including a three day design peak event that is based on the 
most severe cold weather experienced during the last 20 
years in our service territory. 

Our projected sources of delivery for design day firm utility 
customer sendout total approximately 9.3 million therms. Of 
this total, we are currently capable of meeting over 60% of 
our maximum design day requirements with gas from 
storage located within or adjacent to our service territory, 
while the remaining supply requirements would be met by 
gas purchases under firm and recall gas purchase 
contracts. 

On January 5, 2004, we experienced our current record firm 
customer sendout of 7.2 million therms, and a total sendout 
of 8.9 million therms, on a day that was approximately 9 
degrees Fahrenheit warmer than the design day 
temperature. 

We believe that our supplies would be sufficient to meet 
existing firm customer demand if we were to experience 
maximum design day weather conditions. We will continue 
to evaluate and update our forecasted requirements and 
incorporate changes in our integrated resource plan (IRP) 
process (see further discussion of IRP below).

The following table shows the sources of supply that are 
projected to be used to satisfy the design day sendout for 
the 2012-2013 winter heating season:

 Therms in millions

Sources of utility supply

Therms

Percent

Firm supply purchases

Mist underground storage (utility only)

Company-owned LNG storage

Off-system firm storage contracts

Recall agreements

Total

3.3

2.7

1.8

1.1

0.4

9.3

36%

29

19

12

4

100%

The OPUC and WUTC have IRP processes in which utilities 
define different growth scenarios and corresponding 
resource acquisition strategies in an effort to evaluate 
supply and demand resources, consider uncertainties in the 
planning process and the need for flexibility to respond to 

 
changes, and establish a plan for providing reliable service 
at the “least cost.”

basins; and (2) the east, which brings supplies from Alberta 
as well as the U.S. Rocky Mountain supply basins. 

In general, the IRP is filed biannually with both the OPUC 
and the WUTC. An annual update is filed in Oregon in the 
off year. The OPUC acknowledges receipt of the IRP; 
whereas the WUTC provides notice that our IRP met the 
requirements of the Washington Administrative 
Code. Commission acknowledgment of the IRP does not 
constitute ratemaking approval of any specific resource 
acquisition strategy or expenditure. However, the OPUC 
generally indicates that it would give considerable weight in 
prudence reviews to utility actions that are consistent with 
acknowledged plans. The WUTC has indicated that the IRP 
process is one factor it will consider in a prudence 
review. We filed our draft 2013 IRP with Washington in 
January 2013 and will file an IRP update in Oregon in May 
of 2013. 

Lowest Reasonable Cost. We apply cost management 
strategies, including fixed-price contracts, financial 
derivative instruments, storage supplies, acquisition of gas 
reserves, and asset management, to acquire gas supplies 
at the lowest reasonable cost for utility customers. See “Gas 
Supply—Gas Cost Management Strategy” above.

Price Stability. We use physical assets and financial 
instruments to manage commodity price volatility. We 
purchase gas for our storage facility generally during the 
summer months when gas prices are typically lower. In 
addition, our gas reserves provide long-term gas price 
protection for our utility customers. We also mitigate year-to-
year commodity price volatility through financial hedge 
contracts such as commodity price swaps and options. 

Cost Recovery. Mechanisms for gas cost recovery are 
designed to be fair and reasonable, with an appropriate
balancing of interests between our customers and 
shareholders. In general, utility rates are designed to 
recover the costs, but not to earn a return on, the gas 
commodity sold. We minimize risks associated with gas cost 
recovery by:
• 

re-setting customer rates annually to reflect changes in 
forecasted gas costs for the upcoming year and 
differences between actual and forecasted gas costs 
from the prior year. See Part II, Item 7, “Results of 
Operations—Regulatory Matters—Rate Mechanisms—
Purchased Gas Adjustment”;
aligning customer and shareholder interests through 
the use of our PGA incentive sharing mechanism, 
weather normalization, decoupling, and gas storage 
sharing mechanisms. See Part II, Item 7, “Results of 
Operations—Regulatory Matters”; and
periodic review of regulatory deferrals with state 
regulatory commissions and key customer groups.

• 

• 

Transportation of Gas Supplies
SINGLE TRANSPORTATION PIPELINE. Our local gas 
distribution system is reliant on a single, bi-directional 
interstate transmission pipeline to bring gas supplies into 
our distribution system. Although we are dependent on a 
single pipeline, the pipeline’s gas flows into the Portland 
metropolitan market from two directions: (1) the north, which 
brings supplies from the British Columbia and Alberta supply 

8

In 2003 a federal order requiring Northwest Pipeline to 
replace its 26-inch mainline from the Canadian border to our 
service territory underscored the potential need for pipeline 
transportation diversity. That replacement project was 
completed by Northwest Pipeline in November 2006. We 
are pursuing options to further diversify the pipeline 
transportation system. Specifically, we are jointly developing 
plans to build a pipeline that would connect TransCanada 
Pipelines Limited’s (TransCanada) Gas Transmission 
Northwest (GTN) interstate transmission line to our local 
gas distribution system. If constructed, this pipeline would 
provide another transportation path for gas purchases from 
Alberta and the U.S. Rocky Mountains in addition to the one 
that currently moves gas through the Northwest Pipeline 
system. See Part II, Item 7, “2013 Outlook—Strategic 
Opportunities—Pipeline Diversification”.

PIPELINE TRANSPORTATION AGREEMENTS. We incur 
monthly demand charges related to our firm pipeline 
transportation contracts.

Our largest pipeline agreements are with Northwest Pipeline  
for firm transportation capacity providing us access to 
natural gas supplies in British Columbia and the U.S. Rocky 
Mountains by connecting us with Northwest Pipeline and 
GTN systems in Oregon. These and other contracts are 
multi-year contracts with expirations ranging from 2016 to 
2044. We actively work with Northwest Pipeline and others 
to renew these contracts in advance of expiration and 
ensure gas transportation capacity is sufficient to meet our 
needs. 

RATES GOVERNING TRANSPORTATION OF GAS SUPPLIES. 
FERC establishes rates for interstate pipeline transportation 
service under long-term agreements within the U.S., and 
Canadian authorities establish rates for service under 
agreements with the Canadian pipelines over which we ship 
gas.

Gas Storage
Our gas storage segment primarily consists of two 
underground natural gas storage facilities:
•  NON-UTILITY MIST – the non-utility portion of our Mist 

gas storage facility near Mist, Oregon; and 

•  GILL RANCH – our 75% share of the Gill Ranch gas 

storage facility near Fresno, California.  

Transmission pipeline capacity and natural gas production 
are relatively constant over the course of a year compared 
to the demand for natural gas, which fluctuates daily and 
seasonally. Therefore, natural gas storage facilities are 
needed to manage the flow and availability of gas supplies 
during periods of low demand so these supplies can be 
stored and delivered into markets during periods of high 
demand. We capitalize on the imbalance of supply and 
demand and price volatility for natural gas by providing our 
gas storage customers with the ability to store gas for resale 
or use in a higher value period. Our natural gas storage 
facilities allow us to offer customers “multi-cycle” storage 
service, which permits them to inject and withdraw natural 
gas multiple times a year, providing more flexibility to 
capture market opportunities. See Note 4 for more 

information on gas storage assets and results of operations.

Regulation and Rates
Our gas storage segment is subject to regulation with 
respect to, among other matters, rates, terms of service, 
and system of accounts established by the OPUC, WUTC 
and FERC with respect to the Mist facilities, and by the 
California Public Utilities Commission (CPUC) with respect 
to Gill Ranch. Gill Ranch has a tariff on file with the CPUC 
authorizing it to charge market-based rates for the storage 
services offered. FERC has approved maximum cost-based 
rates under our Mist interstate storage certificate. We are 
required to file with FERC either a petition for rate approval 
or a cost and revenue study at least every five years to 
change or justify maintaining the existing rates for the 
interstate storage service. See Part II, Item 7, “Results of 
Operations–Regulatory Matters”.

Facilities
MIST STORAGE FACILITY. We provide gas storage services 
to customers in the interstate and intrastate markets from 
our Mist gas storage facilities located in Columbia County, 
Oregon, near the town of Mist. The Mist field was converted 
to storage operations for our utility customers during the 
1990s. Since 2001, gas storage capacity at Mist has been 
made available to interstate customers by developing new 
incremental capacity in advance of core utility customer 
requirements to meet the demands for interstate storage 
service. These interstate storage services are offered under 
a limited jurisdiction blanket certificate issued by FERC. In 
addition, since 2005 we have offered firm storage services 
in Oregon under an OPUC-approved rate schedule as an 
optional service to eligible non-residential utility customers. 

GILL RANCH STORAGE FACILITY. Gill Ranch Storage, LLC 
(Gill Ranch), our subsidiary, has a joint project agreement 
with Pacific Gas and Electric Company (PG&E) to develop 
and own the Gill Ranch underground natural gas storage 
facility near Fresno, California. Currently, Gill Ranch is the 
sole operator of the facility. The facility began operations in 
the fourth quarter of 2010.

The Gill Ranch facility currently consists of three depleted 
natural gas reservoirs, twelve injection and withdrawal wells, 
a compressor station, dehydration and control equipment, 
gathering lines, an electric substation, a natural gas 
transmission pipeline extending 27 miles from the storage 
field to an interconnection with the PG&E transmission 
system, and other related facilities. Gill Ranch owns the 
rights to 75% of the available storage capacity at the 
facility. Gill Ranch’s share of the facility currently provides 
15 Bcf of working gas capacity.

Gill Ranch is offering storage services to the California 
market at market-based rates, subject to regulation by the 
CPUC for certain activities including, but not limited to, 
service terms and operating conditions.

ASSETS. The following table highlights certain important 
design information about the Company’s non-utility gas 
storage assets.

Mist Storage(1)

Gill Ranch Storage(2)

Storage
Capacity 
(Bcf)

6

15

Withdrawal
(MMcf/day)(3)

Injection
(MMcf/day)(3)

243

488

97

240

(1) Approximately 6 Bcf of a total 16 Bcf at Mist is currently available 
to our gas storage segment. The remaining 10 Bcf is used to 
provide gas storage for our local distribution business and its utility 
customers. All storage capacity and daily deliverability currently 
developed for the gas storage segment at Mist is available for recall 
by the utility.
(2) Our share of the Gill Ranch facility is currently 15 Bcf out of a 
total capacity of 20 Bcf.
(3) Our share of the expected daily maximum injection and 
withdrawal rates.

Interstate Gas Storage
The Mist gas storage facility currently provides firm and 
interruptible gas storage services with related transportation 
services on the utility’s system to and from Mist to interstate 
pipeline interconnections in order to serve customers in 
interstate commerce. The interstate storage services, and 
maximum rates for these services, are authorized and 
regulated by the FERC. The Interstate storage capacity has 
been developed as a non-utility investment by NW Natural 
in advance of core utility customers’ requirements.

Gill Ranch storage facility is not currently authorized to 
provide interstate gas storage services.

Intrastate Gas Storage
The Mist gas storage facility provides intrastate gas storage 
services in Oregon under an OPUC-approved rate schedule 
that includes service eligibility and site-specific 
qualifications. The firm storage service rates, terms and 
conditions mirror our firm interstate storage service 
regulated by FERC, except that these customers are 
located and served in Oregon.

Gill Ranch provides intrastate storage services in California 
at market-based rates under a CPUC-approved tariff that 
includes firm storage service, interruptible storage service, 
and park and loan storage services.

Seasonality of Business
Generally, Mist gas storage revenues do not follow seasonal 
patterns similar to those experienced by the utility because 
most of the storage capacity is contracted with customers 
for firm service, and rates for firm service are primarily in the 
form of fixed monthly reservation charges and not affected 
by customer usage. However, there is seasonal variation 
with Mist storage capacity related to utility, and 
management of available surplus storage capacity and 
related transportation capacity can be managed under 
regulatory sharing agreements with the OPUC and WUTC. 
This temporary surplus capacity is quite often available 
during the spring and summer months when the demand for 
gas by utility customers is low. See "Asset Management" 
below.

Although we expect much of the storage revenue at Gill 
Ranch to be in the form of fixed monthly demand charges, 
total cash flows could be more seasonal in nature than the 
Mist storage facility. A significant portion of operating costs 

9

  
at Gill Ranch is related to compression. Because 
compression is used primarily for the injection of gas rather 
than for withdrawal, we expect power costs to be higher 
during the injection season.

Gas Storage Customers
For our Mist interstate storage services, firm service 
agreements with customers are entered into with terms 
typically ranging from 1 to 10 years. Currently, our gas 
storage revenues from Mist are derived primarily from firm 
service customers who provide energy related services, 
including natural gas production or distribution, electric 
generation, and energy marketing. Three storage customers 
currently account for over 90% of our existing non-utility gas 
storage capacity at Mist, with the largest customer 
accounting for about half of the total capacity. These three 
customers have contracts that expire at various dates 
through 2018. 

Customer contracts for firm storage capacity at Gill Ranch 
are as long as 28 years in duration, but we expect Gill 
Ranch in the early years of operation to contract for terms 
mostly ranging from one to five years due to current market 
conditions. Gill Ranch currently has several storage 
customers, with the largest single contract accounting for 
approximately 13% of the facility’s design capacity. The 
California market served by Gill Ranch is larger, and has a 
greater diversity of prospective customers, than the Pacific 
Northwest market served by Mist. As such, we expect there 
to be less sensitivity to any single customer or group of 
customers for capacity at Gill Ranch. Current Gill Ranch 
customers provide energy related services, including natural 
gas production, marketing, and electric generation.

Competitive Conditions
Our Mist gas storage facility benefits from limited 
competition from other Pacific Northwest storage facilities 
primarily because of its geographic location. However, 
competition from other storage providers in the Pacific 
Northwest region and Canada, as well as competition for 
interstate pipeline capacity, does exist. In the future, we 
could face increased competition from new or expanded gas 
storage facilities as well as from new natural gas pipelines, 
marketers, and alternative energy sources.

The Gill Ranch storage facility competes with a number of 
other storage providers, including local integrated gas 
companies and other independent storage operators in the 
northern California market. There are also ongoing 
expansions and proposed new construction of storage 
capacity in northern California that could increase 
competition for Gill Ranch.

• 

• 

regulatory approval. We believe the earliest timeframe for 
completing the next expansion is 2016. We expect to begin 
working on detailed design and project scope during 2013, 
which will be followed by permitting and construction. The 
project will likely include the development of storage wells, a 
compression station, and additional pipeline facilities that 
would enable more storage expansions in the future.

Gill Ranch Storage Facility. Subject to market demand, 
project execution, available financing, receipt of future 
permits, and other rights, the Gill Ranch storage facility can 
be expanded beyond the current combined permitted 
capacity of 20 Bcf without further expansion of the takeaway 
pipeline system. Taking these considerations into account 
and with certain infrastructure modifications, we currently 
estimate that the Gill Ranch storage facility could support an 
aggregate storage capacity of at least 40 Bcf, of which Gill 
Ranch would have the rights to at least an aggregate of 20 
Bcf or 50% of the total estimated storage capacity.

Asset Management
We contract with an independent energy marketing 
company to provide asset management services, primarily 
through the use of commodity transactions and pipeline 
capacity release transactions, the results of which are 
included in the gas storage business segment, except for 
amounts allocated to our utility pursuant to regulatory 
sharing agreements involving the use of utility assets. Pre-
tax income from third-party asset management services is 
subject to revenue sharing with core utility customers. See 
Part II, Item 7, “Results of Operations–Business Segments - 
Gas Storage” 

Other
We have non-utility investments and other business 
activities which are aggregated and reported as a business 
segment called “Other.” Although in the aggregate these 
investments and activities are not material, we identify and 
report them as a stand-alone segment because these 
investments and activities are not specifically part of our 
utility or gas storage segments. This segment primarily 
consists of: 
• 

an equity method investment in a joint venture to build 
and operate a gas transmission pipeline in Oregon. See 
Part II, Item 7, “2013 Outlook—Strategic Opportunities
—Pipeline Diversification”;
a minority interest in other pipeline assets held by our 
wholly-owned subsidiary NNG Financial Corporation 
(NNG Financial); and 
other operating and non-operating income and 
expenses of the parent company that are not included 
in utility or gas storage operations. 

The pipelines referred to above are regulated by FERC. 
Less than 1% of our consolidated assets and consolidated 
net income are related to activities in the “Other” business 
segment. See Note 4 for summary information on this Other 
segment’s assets and results of operations.

Storage Expansions
Mist Storage Facility. While the Pacific Northwest storage 
markets have been negatively impacted by lower gas prices 
and lack of price volatility, albeit less so than in California, 
we continue to plan for future expansion at Mist in 
anticipation of increased natural gas demand for electric 
generation in the Pacific Northwest. In 2012, a request for 
proposal (RFP) to provide additional electric generation was 
sent out by Portland General Electric (PGE). PGE's bid was 
recently selected for this project. We have an agreement to 
provide gas storage services to PGE as part of this project, 
subject to several conditions including NW Natural receiving 

10

ENVIRONMENTAL ISSUES 

Properties and Facilities  
We own, or previously owned, properties and facilities that 
are currently being investigated that may require 
environmental remediation and are subject to federal, state 
and local laws and regulations related to environmental 
matters. These laws and regulations may require 
expenditures over a long timeframe to address certain 
environmental impacts. Estimates of liabilities for 
environmental response costs are difficult to determine with 
precision because of the various factors that can affect their 
ultimate disposition. These factors include, but are not 
limited to, the following:
• 
• 

the complexity of the site;
changes in environmental laws and regulations at the 
federal, state and local levels;
the number of regulatory agencies or other parties 
involved;
new technology that renders previous technology 
obsolete, or experience with existing technology that 
proves ineffective;
the ultimate selection of a particular technology;
the level of remediation required; and
variations between the estimated and actual period of 
time that must be dedicated to respond to an 
environmentally-contaminated site.

• 

• 

• 
• 
• 

We continue to seek recovery of environmental costs 
through insurance and through customer rates, and we 
believe recovery of these costs is probable. Pursuant to the 
2012 Oregon general rate case, environmental cost 
deferrals will be recovered under the new SRRM subject to 
a reduction for third-party insurance recoveries, a prudence 
review, and an earnings test that will be defined in a 
separate regulatory proceeding which is currently open. As 
there is uncertainty surrounding the outcome of this 
proceeding, we will continue to carefully assess these 
environmental assets for recoverability. If it is determined 
that both the insurance recovery and future rate recovery of 
such costs are not probable, the costs will be charged to 
expense in the period such determination is made. See 
"Results of Operations—Rate Matters—Rate Mechanisms
—Environmental Costs" below and Note 15.

Greenhouse Gas Issues
We recognize that our businesses are likely to be impacted 
by future requirements to address greenhouse gas 
emissions. Future federal and/or state requirements may 
seek to limit future emissions of greenhouse gases, 
including both carbon dioxide (CO2) and methane. These 
future laws and regulations may require certain activities to 
reduce emissions and/or increase the price paid for energy 
based on its carbon content.  

Current federal rules require the reporting of greenhouse 
gas emissions. In September 2009, the EPA issued a final 
rule requiring the annual reporting of greenhouse gas 
emissions from certain industries, specified large 
greenhouse gas emission sources, and facilities that emit 
25,000 metric tons or more of CO2 equivalents per year. We 
began reporting emission information in 2011. Under this 
reporting rule, local gas distribution companies like NW 
Natural are required to report system throughput to the EPA 

11

on an annual basis. The EPA also issued additional 
greenhouse gas reporting regulations requiring the annual 
reporting of fugitive emissions from our operations. 

The outcome of federal and state policy development in the 
area of climate change cannot be determined at this time, 
but these initiatives could produce a number of results 
including potential new regulations, legal actions, additional 
charges to fund energy efficiency activities, or other 
regulatory actions. The adoption and implementation of any 
regulations limiting emissions of greenhouse gas from our 
operations could require us to incur costs to reduce 
emissions of greenhouse gas associated with our 
operations, which could result in an increase in the prices 
we charge our customers or a decline in the demand for 
natural gas. On the other hand, because natural gas is a 
fossil fuel with relatively low carbon content, it is also 
possible that future carbon constraints could create 
additional demand for natural gas for electric generation, 
direct use of natural gas in homes and businesses, and as a 
reliable and relatively low-emission back-up fuel source for 
alternative energy sources. Requirements to reduce 
greenhouse gas emissions from the transportation sector, 
such as those in Oregon’s clean fuel standard, could also 
result in additional demand for natural gas for use in 
vehicles.

We continue to take steps to address future greenhouse 
gas emission issues, including actively participating in policy 
development through participation on various Oregon 
taskforces and, at the federal level, within the American Gas 
Association. We continue to engage in policy development 
and in identifying ways to reduce greenhouse gas emissions 
associated with our operations and our customers’ gas use, 
including offering the Smart Energy program, which allows 
customers to voluntarily contribute funds to projects such as 
biodigesters on dairy farms that offset the greenhouse 
gases produced from their natural gas use.

EMPLOYEES 

At December 31, 2012, the utility workforce consisted of 623 
members of the Office and Professional Employees 
International Union (OPEIU) Local No. 11, AFL-CIO, and 
469 non-union employees. Our labor agreement with 
members of OPEIU that covers wages, benefits and 
working conditions extends to May 31, 2014, and thereafter 
from year to year unless either party serves notice of its 
intent to negotiate modifications to the collective bargaining 
agreement.

At December 31, 2012, our subsidiaries had a combined 
workforce of 20 non-union employees. Our subsidiaries 
receive certain services from centralized operations at the 
utility, and as such the utility is reimbursed for those 
services pursuant to a Shared Services Agreement.

 
ADDITIONS TO INFRASTRUCTURE

We make capital expenditures in order to maintain and 
enhance the safety and integrity of our pipelines, terminals, 
storage facilities and related assets, to expand the reach or 
capacity of those assets, or improve the efficiency of our 
operations to pursue new business opportunities. We 
expect to make a significant level of capital expenditures for 
additions to utility and gas storage infrastructure over the 
next five years, reflecting continued investments in 
customer growth, technology, distribution system 
improvements and gas storage facilities. In 2013, utility 
capital expenditures are estimated to be between $115 and 
$130 million, and non-utility capital investments are 
estimated to be between $10 and $15 million. For the five-
year period ending in 2017, capital expenditures for the 
utility are estimated to be between $600 and $700 million, 
while the amount for gas storage and other investments 
after 2013 will depend largely on future decisions about 
potential expansion opportunities in gas storage and 
pipeline projects.

EXECUTIVE OFFICERS OF THE REGISTRANT

For information concerning our executive officers, see Part 
III, Item 10.

AVAILABLE INFORMATION

We file annual, quarterly and special reports and other 
information with the Securities and Exchange Commission 
(SEC). Reports, proxy statements and other information 
filed by us can be read and requested through the SEC by 

mail at U.S. Securities and Exchange Commission, Office of 
FOIA/PA Operations, 100 F Street, N.E., Washington, D.C. 
20549, by facsimile at (202) 772-9337, or online at its 
website (http://www.sec.gov). You can obtain information 
about access to the Public Reference Room and how to 
access or request records by calling the SEC at (202) 
551-8090. The SEC website contains reports, proxy and 
information statements and other information that we file 
electronically. In addition, we make available on our website 
(http://www.nwnatural.com), our annual report on Form 10-
K, quarterly reports on Form 10-Q, current reports on Form 
8-K, and amendments to those reports filed or furnished 
pursuant to Section 13(a) or 15(d) and proxy materials filed 
under Section 14 of the Securities Exchange Act of 1934, as 
amended (Exchange Act), as soon as reasonably 
practicable after we electronically file such material with, or 
furnish it to, the SEC. 

We have adopted a Code of Ethics (Code) for all employees 
and officers that is available on our website. We intend to 
disclose amendments to, and any waivers from the Code of 
Ethics on our website. Our Corporate Governance 
Standards, Director Independence Standards, charters of 
each of the committees of the Board of Directors and 
additional information about us are also available at the 
website. Copies of these documents may be requested, at 
no cost, by writing or calling Shareholder Services, NW 
Natural, One Pacific Square, 220 N.W. Second Avenue, 
Portland, Oregon 97209, telephone 503-226-4211 ext. 
3412.

12

ITEM 1A. RISK FACTORS

Our business and financial results are subject to a number 
of risks and uncertainties, many of which are not within our 
control. When considering any investment in our securities, 
investors should carefully consider the following information, 
as well as information contained in the caption “Forward-
Looking Statements,” Item 7A, and other documents we file 
with the SEC. This list is not exhaustive and the order of 
presentation does not reflect management’s determination 
of priority or likelihood. Additionally, our listing of risk factors 
that primarily affect one of our business segments does not 
indicate that such risk factor is inapplicable to our other 
business segments.

Risks Related to our Business Generally
REGULATORY RISK. Regulation of our businesses, including 
changes in the regulatory environment, failure of regulatory 
authorities to approve rates which provide for timely 
recovery of our costs and an adequate return on invested 
capital, or an unfavorable outcome in regulatory 
proceedings may adversely impact our financial condition 
and results of operations.

The OPUC and WUTC have general regulatory authority 
over our utility business in Oregon and Washington, 
respectively, including the rates charged to customers, 
authorized rates of return on rate base, including return on 
equity, the amounts and types of securities we may issue, 
services we provide and the manner in which we provide 
them, the nature of investments we make, actions investors 
may take with respect to our company, and deferral and 
recovery of various expenses, including, but not limited to, 
pipeline replacement, environmental remediation costs, 
pension expense, transactions with affiliated interests, and 
other matters. Similarly, in our gas storage business FERC 
has regulatory authority over interstate storage services, 
and the CPUC has regulatory authority over our Gill Ranch 
storage operations.

The prices that the OPUC and WUTC allow us to charge for 
retail service, and the tariff rate that FERC permits us to 
charge for transmission, are the most significant factors 
affecting our financial position, results of operations and 
liquidity. The OPUC and WUTC have the authority to 
disallow recovery of costs they find imprudently incurred. 
For example, in our most recent Oregon rate case 
concluding in 2012, the OPUC disallowed certain deferred 
tax amounts the deferral of which was not previously 
reviewed by the OPUC, resulting in an after tax charge to 
net income when the order was received. Additionally, the 
rates allowed by the FERC may be insufficient for recovery 
of costs incurred. We expect to continue to make 
expenditures to expand, improve and operate our utility 
distribution and gas storage systems. Regulators can find 
such expansions or improvements of expenditures were not 
prudently incurred, and deny recovery. Additionally, while 
the OPUC and WUTC have established through the 
ratemaking process an authorized rate of return for our 
utility, the regulatory process does not provide assurance 
that we will be able to achieve the earnings level authorized.

Moreover, in the normal course of business we may place 
assets in service or incur higher than expected levels of 
operating expense before rate cases can be filed to recover 

13

those costs—this is commonly referred to as “regulatory 
lag.” The failure of any regulatory commission to approve 
requested rate increases on a timely basis to recover 
increased costs or to allow an adequate return could 
adversely impact our financial condition and results of 
operations.

In our latest general rate case with the OPUC, various items 
were deferred for future resolution in separate proceedings, 
including a review of our working gas inventory carrying 
costs, the definition of the earnings test under the SRRM, 
the prudence of environmental expenditures we have 
deferred to date, recovery of prepaid pension costs, and our 
revenue-sharing arrangement on the utility's interstate 
storage activities. The regulatory proceedings in which 
these issues will be resolved typically involve multiple 
parties, including governmental agencies, consumer 
advocacy groups, and others who are impacted by the use 
of natural gas. Each party has differing concerns, but all 
generally have the common objective of limiting amounts 
included in rates. We cannot predict the outcome of these 
deferred proceedings or the effects of those outcomes on 
our results of operations and financial condition.

ECONOMIC AND MARKET RISK. Adverse economic and 
financial market conditions may have a negative impact on 
our financial condition and results of operations.

While the national and regional economy appears to be 
experiencing some recovery from the recent downturn, we 
cannot predict how robust the recovery will be, or whether it 
will be sustained. Continued or increased sluggishness in 
our regional economy, could result in low levels of new 
housing construction, conversions to natural gas, customer 
additions, and relatively higher levels of residential 
vacancies, lending restrictions, and personal and business 
bankruptcies, as well as reduced spending. All of these 
factors could all result in a decline in or sustained lower 
levels of natural gas consumption and customer growth, a 
slowing of collections from our customers, and higher levels 
of delinquent accounts receivable and bad debts, all of 
which could have a negative effect on our financial condition 
and results of operations.

ENVIRONMENTAL LIABILITY RISK. Certain of our properties 
and facilities may pose environmental risks requiring 
remediation, the costs of which are difficult to estimate and 
which could adversely affect our financial condition, results 
of operations, and cash flows.

We own, or previously owned, properties that require 
environmental remediation or other action. We accrue all 
material loss contingencies relating to these properties. A 
regulatory asset at the utility has already been recorded for 
estimated costs pursuant to a deferral order from the OPUC 
and WUTC. In addition to maintaining regulatory deferrals, 
we are vigorously litigating against certain of our historical 
liability insurers for a portion of the costs we have incurred 
to date and expect to incur in the future. To the extent we 
are unable to recover these deferred costs in utility 
customer rates or through insurance, we would be required 
to reduce our regulatory asset which would result in a 
charge to current year earnings. In addition, in our most 

recent Oregon general rate case, the OPUC approved the 
SRRM, which limits recovery of our deferred amounts to 
those amounts which satisfy an annual prudence review 
and an earnings test, the definition of which was deferred to 
a later regulatory proceeding. These prudence reviews and 
earnings tests could reduce the amounts we are allowed to 
recover, and which could adversely affect our financial 
condition, results of operations and cash flows

In addition to litigation against historical insurers, we may 
have disputes with regulators and other parties as to the 
severity of particular environmental matters and what 
remediation efforts are appropriate. We cannot predict with 
certainty the amount or timing of future expenditures related 
to environmental investigation, remediation or other action, 
or disputes or litigation arising in relation thereto. Our 
liability estimates are based on current remediation 
technology, industry experience gained at similar sites, an 
assessment of the probable level of involvement, and 
financial condition of other potentially responsible parties. 
However, it is difficult to estimate such costs due to 
uncertainties surrounding the course of environmental 
remediation, the preliminary nature of certain of our site 
investigations, and the application of environmental laws 
that impose joint and several liabilities on all potentially 
responsible parties. These uncertainties and disputes 
arising therefrom could lead to further adversarial 
administrative proceedings or litigation, with associated 
costs and uncertain outcomes, all of which could adversely 
affect our financial condition, results of operations and cash 
flows.     

ENVIRONMENTAL REGULATION COMPLIANCE RISK. We are 
subject to environmental regulations for our ongoing 
operations, compliance with which could adversely affect 
our operations or financial results.

We are subject to laws, regulations and other legal 
requirements enacted or adopted by federal, state and local 
governmental authorities relating to protection of the 
environment, including those legal requirements that govern 
discharges of substances into the air and water, the 
management and disposal of hazardous substances and 
waste, groundwater quality and availability, plant and wildlife 
protection, and other aspects of environmental regulation. 
Current and additional environmental regulations could 
result in increased compliance costs or additional operating 
restrictions and could have an adverse effect on our 
financial condition and results of operations, particularly if 
those costs are not fully recoverable from insurance or 
through utility customer rates.

GLOBAL CLIMATE CHANGE RISK. Future legislation to 
address global climate change may expose us to regulatory 
and financial risk. Additionally, our business may be subject 
to physical risks associated with climate change, all of which 
could adversely affect our financial condition, results of 
operations and cash flows.

There are a number of international, federal and state 
legislative and regulatory initiatives being proposed and 
adopted in an attempt to measure, control or limit the effects 
of global warming and overall climate change, including 
greenhouse gas emissions such as carbon dioxide and 
methane. Such current or future legislation or regulation 

could impose on us operational requirements, additional 
charges to fund energy efficiency initiatives, or levy a tax 
based on carbon content. Such initiatives could result in us 
incurring additional costs to comply with the imposed 
restrictions, provide a cost advantage to energy sources 
other than natural gas, reduce demand for natural gas, 
impose costs or restrictions on end users of natural gas, 
impact the prices we charge our customers, impose 
increased costs on us associated with the adoption of new 
infrastructure and technology to respond to such 
requirements, and may impact cultural perception of our 
service or products negatively, diminishing the value of our 
brand, all of which could adversely affect our business 
practices, financial condition and results of operations.

Climate change may cause physical risks, including an 
increase in sea level, intensified storms, water scarcity and 
changes in weather conditions, such as changes in 
precipitation, average temperatures and extreme wind or 
other climate conditions. A significant portion of the nation’s 
gas infrastructure is located in areas susceptible to storm 
damage that could be aggravated by wetland and barrier 
island erosion, which could give rise to gas supply 
interruptions and price spikes.

These and other physical changes could result in 
disruptions to natural gas production and transportation 
systems potentially increasing the cost of gas beyond that 
assumed in our PGA and affecting our ability to procure gas 
to meet our customer demand. These changes could also 
affect our distribution systems resulting in increased 
maintenance and capital costs, disruption of service, 
regulatory actions and lower customer satisfaction. 
Additionally, to the extent that climate change adversely 
impacts the economic health or weather conditions of our 
service territory directly, it could adversely impact customer 
demand or our customers' ability to pay. Such physical risks 
could have an adverse effect on our financial condition, 
results of operations, and cash flows.

BUSINESS DEVELOPMENT RISK. Our business development 
projects may encounter unanticipated obstacles, costs, 
changes or delays that could result in a project becoming 
impaired, which could negatively impact our financial 
condition, results of operations and cash flows.

Business development projects involve many risks. We are 
currently engaged in several business development 
projects, including, but not limited to, the early planning and 
development stage on a regional cross-Cascades pipeline 
in Oregon. We may also engage in other business 
development projects in the future, including expansion of 
our gas storage facilities at Mist or Gill Ranch, or the 
investment in additional long-term gas reserves. With 
respect to these projects, we may not be able to obtain 
required governmental permits and approvals to complete 
our projects in a cost-efficient or timely manner potentially 
resulting in delays or abandonment of the projects. We 
could also experience startup and construction delays, 
construction cost overruns, inability to negotiate acceptable 
agreements such as rights-of-way, easements, construction, 
gas supply or other material contracts, changes in customer 
demand or commitment, public opposition to projects, 
changes in market prices, and operating cost increases. 
Additionally, we may be unable to finance our business 

14

 
development projects at acceptable interest rates or within a 
scheduled timeframe necessary for completing the project. 
One or more of these events could result in the project 
becoming impaired, and such impairment could have an 
adverse effect on our financial condition and results of 
operations.

• 

• 

JOINT PARTNER RISK. Investing in business development 
projects through partnerships, joint ventures or other 
business arrangements affects our ability to manage certain 
risks and could adversely impact our financial condition, 
results of operations and cash flows.

We use joint ventures and other business arrangements to 
manage and diversify the risks of certain utility and non-
utility development projects, including our cross-Cascades 
pipeline, Gill Ranch storage and Encana gas reserves. We 
may acquire or develop part-ownership interests in other 
similar projects in the future. Under these arrangements, we 
may not be able to fully direct the management and policies 
of the business relationships, and other participants in those 
relationships may take action contrary to our interests 
including making operational decisions that could affect our 
costs and liabilities. In addition, other participants may 
withdraw from the project, become financially distressed or 
bankrupt, or have economic or other business interests or 
goals that are inconsistent with ours. 

For example, our gas reserves venture with Encana, which 
operates as a hedge backed by physical gas supplies, 
involves a number of risks. These risks include gas 
production that is significantly less than the expected 
volumes, or no gas volumes; operating costs that are higher 
than expected; changes in our consolidated tax position or 
tax law that could affect our ability to take, or timing of, 
certain tax benefits that impact the financial outcome of this 
transaction; inherent risks of gas production, including 
disruption to operations or complete shut-in of the field; and 
a participant in one of these business arrangements acting 
contrary to our interests. In addition, while the cost of the 
gas reserves venture with Encana is currently included in 
customer rates, the occurrence of one or more of these 
risks, could affect our ability to recover this hedge in rates, 
which could adversely impact the project as well as our 
financial condition, results of operations and cash flows. 

OPERATING RISK. Transporting and storing natural gas 
involves numerous risks that may result in accidents and 
other operating risks and costs, some or all of which may 
not be fully covered by insurance, and which could 
adversely affect our financial condition, results of operations 
and cash flows.

Our operations are subject to all of the risks and hazards 
inherent in the businesses of local gas distribution and 
storage, including:
• 

earthquakes, floods, storms, landslides and other 
adverse weather conditions and hazards;
leaks or other losses of natural gas or other 
hydrocarbons as a result of the malfunction of 
equipment or facilities;
damages from third parties, including construction, farm 
and utility equipment or other surface users;
operator errors;

• 

• 

• 

negative unpredicted performance by our storage 
reservoirs that could cause us to fail to meet expected 
or forecasted operational levels or contractual 
commitments to our customers;
problems maintaining, or the malfunction of, pipelines, 
wellbores and related equipment and facilities that form 
a part of the infrastructure that is critical to the 
operation of our gas distribution and storage facilities;
collapse of underground storage caverns;

• 
•  migration of natural gas through faults in the rock or to 
some area of the reservoir where existing wells cannot 
drain the gas effectively resulting in loss of the gas;
blowouts (uncontrolled escapes of gas from a pipeline 
or well) or other accidents, fires and explosions; and
risks and hazards inherent in the drilling operations 
associated with the development of the gas storage 
facilities and/or wells.

• 

• 

These risks could result in personal injury or loss of human 
life, damage to and destruction of property and equipment, 
pollution or other environmental damage, breaches of our 
contractual commitments, and may result in curtailment or 
suspension of our operations, which in turn could lead to 
significant costs and lost revenues. Further, because our 
pipeline, storage and distribution facilities are in or near 
populated areas, including residential areas, commercial 
business centers, and industrial sites, any loss of human life 
or adverse financial outcome resulting from such events 
could be significant. Additionally, we may not be able to 
obtain the level or types of insurance we desire, and the 
insurance coverage we do obtain may contain large 
deductibles or fail to cover certain hazards or cover all 
potential losses. The occurrence of any operating risks not 
covered by insurance could adversely affect our financial 
condition, results of operations and cash flows.

BUSINESS CONTINUITY RISK. We may be adversely 
impacted by local or national disasters, pandemic illness, 
terrorist activities, including cyber attacks, and other 
extreme events to which we may not able to promptly 
respond.

Local or national disasters, pandemic illness, terrorist 
activities, including cyber attacks, and other extreme events 
are a threat to our assets and operations. Companies in our 
industry may face a heightened risk due to exposure to acts 
of terrorism, including physical and cyber attacks, that could 
target or impact our natural gas distribution, transmission or 
storage facilities and result in a disruption in our operations 
and ability to meet customer requirements. In addition, the 
threat of terrorist activities could lead to increased economic 
instability and volatility in the price of natural gas that could 
affect our operations. Threatened or actual national 
disasters or terrorist activities may also disrupt capital 
markets and our ability to raise capital, or impact our 
suppliers or our customers directly. Local disaster or 
pandemic illness could result in part of our workforce being 
unable to operate or maintain our infrastructure or perform 
other tasks necessary to conduct our business. A slow or 
inadequate response to events may have an adverse 
impact on operations and earnings. We may not be able to 
obtain sufficient insurance to cover all risks associated with 
local and national disasters, pandemic illness, terrorist 
activities and other events, which could increase the risk 
that an event could adversely affect our operations or 
financial results.

15

EMPLOYEE BENEFIT RISK. The cost of providing pension 
and postretirement healthcare benefits is subject to changes 
in pension assets and liabilities, changing employee 
demographics and changing actuarial assumptions, which 
may have an adverse effect on our financial condition, 
results of operations and cash flows.

Until we closed the plans to new hires, which for non-union 
employees was in 2006 and for union employees was in 
2009, we provided pension plans and postretirement 
healthcare benefits to eligible full-time utility employees and 
retirees. Most of our current utility employees were hired 
prior to these dates, and therefore remain eligible for these 
plans. Our cost of providing such benefits is subject to 
changes in the market value of our pension assets, changes 
in employee demographics including longer life 
expectancies, increases in healthcare costs, current and 
future legislative changes, and various actuarial calculations 
and assumptions. The actuarial assumptions used to 
calculate our future pension and postretirement healthcare 
expense may differ materially from actual results due to 
significant market fluctuations and changing withdrawal 
rates, wage rates, interest rates and other factors. These 
differences may result in an adverse impact on the amount 
of pension contributions, pension expense or other 
postretirement benefit costs recorded in future periods. 
Sustained declines in equity markets and reductions in bond 
rates may have a material adverse effect on the value of our 
pension fund assets. In these circumstances, we may be 
required to recognize increased contributions and pension 
expense earlier than we had planned to the extent that the 
value of pension assets is less than the total anticipated 
liability under the plans, which could have a negative impact 
on financial condition, results of operations and cash flows.

WORKFORCE RISK. Our business is heavily dependent on 
being able to attract and retain qualified employees and 
maintain a competitive cost structure with market-based 
salaries and employee benefits, and workforce disruptions 
could adversely affect our operations and results.

Our ability to implement our business strategy and serve our 
customers is dependent upon our continuing ability to attract 
and retain talented professionals and a technically skilled 
workforce, and being able to transfer the knowledge and 
expertise of our workforce to new employees as our aging 
employees retire. Without an appropriately skilled 
workforce, our ability to provide quality service and meet our 
regulatory requirements will be challenged and this could 
negatively impact our earnings. Additionally, within our utility 
segment a majority of our workers are represented by the 
OPEIU Local No.11 AFL-CIO (the Union), and are covered 
by a collective bargaining agreement that extends to May 
31, 2014. Disputes with the Union over terms and conditions 
of the agreement could result in instability in our labor 
relationship and work stoppages that could impact the 
timely delivery of gas and other services from our utility and 
Mist gas storage, which could strain relationships with 
customers and state regulators and cause a loss of 
revenues. Our collective bargaining agreement may also 
increase the cost of employing our Union workforce, affect 
our ability to continue offering market-based salaries and 
employee benefits, limit our flexibility in dealing with our 
workforce, and limit our ability to change work rules and 
practices and implement other efficiency-related 

improvements to successfully compete in today’s 
challenging marketplace, which may negatively affect our 
financial condition and results of operations.

LEGISLATIVE, COMPLIANCE AND TAXING AUTHORITY RISK. 
We are subject to governmental regulation, and compliance 
with local, state and federal requirements, including taxing 
requirements, and unforeseen changes in or interpretations 
of such requirements could affect our financial condition and 
results of operations.

We are subject to regulation by federal, state and local 
governmental authorities. We are required to comply with a 
variety of laws and regulations and to obtain authorizations, 
permits, approvals and certificates from governmental 
agencies in various aspects of our business. We cannot 
predict with certainty the impact of any future revisions or 
changes in interpretations of existing regulations or the 
adoption of new laws and regulations applicable to them. 
Additionally, any failure to comply with existing or new laws 
and regulations could result in fines, penalties or injunctive 
measures that could affect operating assets. For example, 
under the Energy Policy Act of 2005, the FERC has civil 
authority under the Natural Gas Act to impose penalties for 
current violations of up to $1 million per day for each 
violation. In addition, as the regulatory environment for our 
industry increases in complexity, the risk of inadvertent 
noncompliance may also increase. Changes in regulations, 
the imposition of additional regulations, and the failure to 
comply with laws and regulations could negatively influence 
our operating environment and results of operations.  

Additionally, changes in federal, state or local tax laws and 
their related regulations, or differing interpretation or 
enforcement of applicable law by a federal, state or local 
taxing authority, could result in substantial cost to us and 
negatively affect our results of operations. Tax law and its 
related regulations and case law are inherently complex and 
dynamic. Disputes over interpretations of tax laws may be 
settled with the taxing authority in examination, upon appeal 
or through litigation. Our judgments may include reserves 
for potential adverse outcomes regarding tax positions that 
have been taken that may be subject to challenge by taxing 
authorities. Changes in laws, regulations or adverse 
judgments may negatively affect our financial condition and 
results of operations.

SAFETY REGULATION RISK. We may experience increased 
federal, state and local regulation of the safety of our 
systems and operations, which could adversely affect our 
operating costs and financial results.

The safety and protection of the public, our customers and 
our employees is and will remain our top priority. We are 
committed to consistently monitoring and maintaining our 
distribution system and storage operations to ensure that 
natural gas is acquired, stored and delivered safely, reliably 
and efficiently. Given recent high-profile natural gas 
explosions and accidents in other parts of the country, we 
anticipate that the natural gas industry may be the subject of 
even greater federal, state and local regulatory oversight. 
We intend to work diligently with industry associations and 
federal and state regulators to ensure compliance with the 
new laws, such as the “Pipeline Safety, Regulatory 
Certainty, and Job Creation Act of 2011” signed into law in 

16

early 2012. We expect there to be increased costs 
associated with compliance with this and similar laws, and 
those costs could be significant. If these costs are not 
recoverable in our customer rates, they could have a 
negative impact on our operating costs and financial results.

HEDGING RISK. Our risk management policies and hedging 
activities cannot eliminate the risk of commodity price 
movements and other financial market risks, and our 
hedging activities may expose us to additional liabilities for 
which rate recovery may be disallowed, which could result 
in an adverse impact on our operating revenues, costs, 
derivative assets and liabilities and operating cash flows.

Our gas purchasing requirements expose us to risks of 
commodity price movements, while our use of debt and 
equity financing exposes us to interest rate, liquidity and 
other financial market risks. In our Utility segment, we 
attempt to manage these exposures with both financial and 
physical hedging mechanisms, including our recent gas 
reserve transaction with Encana which is a hedge backed 
by physical gas supplies. While we have risk management 
procedures for hedging in place, they may not always work 
as planned and cannot entirely eliminate the risks 
associated with hedging. Additionally, our hedging activities 
may cause us to incur additional expenses to obtain the 
hedge. We do not hedge our entire interest rate or 
commodity cost exposure, and the unhedged exposure will 
vary over time. Gains or losses experienced through 
hedging activities, including carrying costs, generally flow 
through the PGA mechanism or are recovered in future 
general rate cases. However, the hedge transactions we 
enter into for the utility are subject to a prudence review by 
the OPUC and WUTC, and, if found imprudent, those 
expenses may be disallowed, which could have an adverse 
effect on our financial condition and results of operations. 

In addition, our actual business requirements and available 
resources may vary from forecasts, which are used as the 
basis for our hedging decisions, and could cause our 
exposure to be more or less than we anticipated. Moreover, 
if our derivative instruments and hedging transactions do 
not qualify for hedge accounting under generally accepted 
accounting standards, our hedges may not be effective and 
our results of operations and financial condition could be 
adversely affected.

We also have credit-related exposure to derivative 
counterparties. In general, we require our counterparties to 
have an investment-grade credit rating at the time the 
derivative instrument is entered into, and we specify limits 
on the contract amount and duration based on each 
counterparty’s credit rating. Nevertheless, counterparties 
owing us money or physical natural gas commodities could 
breach their obligations. Should the counterparties to these 
arrangements fail to perform, we may be forced to enter into 
alternative arrangements to meet our normal business 
requirements. In that event, our financial results could be 
adversely affected. Additionally, under most of our hedging 
arrangements, any downgrade of our senior unsecured 
long-term debt credit rating could allow our counterparties to 
require us to post cash, a letter of credit or other form of 
collateral, which would expose us to additional costs and 
may trigger significant increases in borrowing from our 

credit facilities if the credit rating downgrade is below 
investment grade.

INABILITY TO ACCESS CAPITAL MARKET RISK. Our inability 
to access capital, or significant increases in the cost of 
capital, could adversely affect our financial condition and 
results of operations.

Our ability to obtain adequate and cost effective short-term 
and long-term financing depends on maintaining investment 
grade credit ratings as well as the existence of liquid and 
stable financial markets. Our businesses rely on access to 
capital markets, including commercial paper, bond and 
equity markets, to finance our operations, construction 
expenditures and other business requirements, and to 
refund maturing debt that cannot be funded entirely by 
internal cash flows. Disruptions in the capital markets could 
adversely affect our ability to access short-term and long-
term financing. Our access to funds under committed short-
term credit facilities, which are currently provided by a 
number of banks, is dependent on the ability of the 
participating banks to meet their funding commitments. 
Those banks may not be able to meet their funding 
commitments if they experience shortages of capital and 
liquidity. Disruptions in the bank or capital financing markets 
as a result of economic uncertainty, changing or increased 
regulation of the financial sector, or failure of major financial 
institutions could adversely affect our access to capital and 
negatively impact our ability to run our business and make 
strategic investments.

A negative change in our current credit ratings, particularly 
below investment grade, could adversely affect our cost of 
borrowing and access to sources of liquidity and capital. 
Such a downgrade could further limit our access to 
borrowing under available credit lines. Additionally, 
downgrades in our current credit ratings below investment 
grade could cause additional delays in accessing the capital 
markets by the utility while we seek supplemental state 
regulatory approval, which could hamper our ability to 
access credit markets on a timely basis. A credit downgrade 
could also require additional support in the form of letters of 
credit, cash or other forms of collateral and otherwise 
adversely affect our financial condition and results of 
operations.

Risks Related Primarily to Our Local Utility Business
GAS PRICE RISK. Higher natural gas commodity prices and 
volatility in the price of gas may adversely affect our results 
of operations and cash flows.

The cost of natural gas is affected by a variety of factors, 
including weather, changes in demand, the level of 
production and availability of natural gas supplies, 
transportation constraints, availability and cost of pipeline 
capacity, federal and state energy and environmental 
regulation and legislation, natural disasters and other 
catastrophic events, national and worldwide economic and 
political conditions, and the price and availability of 
alternative fuels. In our utility segment, the cost we pay for 
natural gas is generally passed through to our customers 
through an annual PGA rate adjustment. If gas prices were 
to increase significantly, it would raise the cost of energy to 
our utility customers, potentially causing those customers to 
conserve or switch to alternate sources of energy. 

17

 
Significant price increases could also cause new home 
builders and commercial developers to select alternative 
fuel sources. Decreases in the volume of gas we sell could 
reduce our earnings, and a decline in customers could slow 
growth in our future earnings. Additionally, because a 
portion of any 10% or 20% difference between the 
estimated average PGA gas cost in rates and the actual 
average gas cost incurred is recognized as current income 
or expense, higher average gas costs than those assumed 
in setting rates can adversely affect our operating cash 
flows, liquidity and results of operations. Additionally, 
notwithstanding our current rate structure, higher gas costs 
could result in increased pressure on the OPUC or the 
WUTC to seek other means to reduce rates, which also 
could adversely affect our results of operations and cash 
flows.

Higher gas prices may also cause us to experience an 
increase in short-term debt and temporarily reduce liquidity 
because we pay suppliers for gas when it is purchased, 
which can be in advance of when these costs are recovered 
through rates. Significant increases in the price of gas can 
also slow our collection efforts as customers experience 
increased difficulty in paying their higher energy bills, 
leading to higher than normal delinquent accounts 
receivable resulting in greater expense associated with 
collection efforts and increased bad debt expense.

it may negatively affect our ability to attract new customers 
or retain our existing residential, commercial and industrial 
customers, which could have a negative impact on our 
customer growth rate and results of operations.

RELIANCE ON THIRD PARTIES TO SUPPLY NATURAL GAS 
RISK. We rely on third parties to supply the natural gas in 
our distribution segment, and limitations on our ability to 
obtain supplies, or failure to receive expected supplies for 
which we have contracted, could have an adverse impact 
on our financial results.

Our ability to secure natural gas for current and future sales 
depends upon our ability to purchase and receive delivery of 
supplies of natural gas from third parties. We, and in some 
cases, our suppliers of natural gas do not have control over 
the availability of natural gas supplies, competition for those 
supplies, disruptions in those supplies, priority allocations 
on transmission pipelines, or pricing of those supplies. 
Additionally, third parties on which we rely may fail to deliver 
gas for which we have contracted. If we are unable to 
obtain, or are limited in our ability to obtain, natural gas from 
our current suppliers or new sources, we may not be able to 
meet our customers' gas requirements and would likely 
incur costs associated with actions necessary to mitigate 
services disruptions, both of which could significantly and 
negatively impact our results of operations.

CUSTOMER GROWTH RISK. Our utility margin, earnings and 
cash flow may be negatively affected if we are unable to 
sustain customer growth rates in our local gas distribution 
segment.

SINGLE TRANSPORTATION PIPELINE RISK. We rely on a 
single pipeline company for the transportation of gas to our 
service territory, a disruption of which could adversely 
impact our ability to meet our customers’ gas requirements.

Our utility margins and earnings growth have largely 
depended upon the sustained growth of our residential and 
commercial customer base due, in part, to the new 
construction housing market, conversions of customers to 
natural gas from other fuel sources and growing commercial 
use of natural gas. Insufficient growth in these markets, for 
economic, political or other reason could result in an 
adverse long-term impact on our utility margin, earnings and 
cash flows.

RISK OF COMPETITION. Our gas distribution business is 
subject to increased competition which could negatively 
affect our results of operations.

In the residential market, our gas distribution business 
competes primarily with suppliers of electricity, fuel oil, 
propane, and renewable energy providers. We also 
compete with suppliers of electricity, fuel oil and renewable 
energy providers for commercial applications. In the 
industrial market, we compete with suppliers of all forms of 
energy, including oil, electricity, renewable energy providers 
and, as it relates to sources of energy for electric power 
plants, coal and hydro. Competition among these forms of 
energy is based on price, efficiency, reliability, performance, 
market conditions, technology, environmental impacts and 
public perception.

Technological improvements in other energy sources such 
as heat pumps could also erode our competitive advantage. 
If natural gas prices rise relative to other energy sources, or 
if the cost, environmental impact or public perception of 
such other energy sources improves relative to natural gas, 

Our distribution system is directly connected to a single 
interstate pipeline, which is owned and operated by 
Northwest Pipeline. The pipeline’s gas flows are bi-
directional, transporting gas into the Portland metropolitan 
market from two directions: (1) the north, which brings 
supplies from the British Columbia and Alberta supply 
basins; and (2) the east, which brings supplies from the 
Alberta and the U.S. Rocky Mountain supply basins. If there 
is a rupture or inadequate capacity in the pipeline, we may 
not be able to meet our customers’ gas requirements and 
we would likely incur costs associated with actions 
necessary to mitigate service disruptions, both of which 
could significantly and negatively impact our results of 
operations.

WEATHER RISK. Warmer than average weather may have a 
negative impact on our revenues and results of operations.

We are exposed to weather risk primarily in our utility 
segment. A majority of our volume is driven by gas sales to 
space heating residential and commercial customers during 
the winter heating season. Current utility rates are based on 
an assumption of average weather. Warmer than average 
weather typically results in lower gas sales. Colder weather 
typically results in higher gas sales. Although the effects of 
warmer or colder weather on utility margin in Oregon are 
expected to be mitigated through the operation of our 
weather normalization mechanism, weather variations from 
normal could adversely affect utility margin because we may 
be required to purchase more or less gas at spot rates, 
which may be higher or lower than the rates assumed in our 
PGA. Also, a portion of our Oregon residential and 

18

commercial customers (usually less than 10%) have opted 
out of the weather normalization mechanism, and 10% of 
our customers are located in Washington where we do not 
have a weather normalization mechanism. These effects 
could have an adverse effect on our financial condition, 
results of operations and cash flows.

CUSTOMER CONSERVATION RISK. Customers’ conservation 
efforts may have a negative impact on our revenues.

An increasing national focus on energy conservation, 
including improved building practices and appliance 
efficiencies may result in increased energy conservation by 
customers. This can decrease our sales of natural gas and 
adversely affect our results of operations because revenues 
are collected mostly through volumetric rates, based on the 
amount of gas sold. In Oregon, we have a conservation 
tariff which is designed to recover lost utility margin due to 
declines in residential and commercial customers’ 
consumption. However, we do not have a conservation tariff 
in Washington that provides us this protection.

RELIANCE ON TECHNOLOGY RISK. Our efforts to integrate, 
consolidate and streamline our operations have resulted in 
increased reliance on technology, the failure or security 
breach of which could adversely affect our financial 
condition and results of operations.

Over the last several years we have undertaken a variety of 
initiatives to integrate, standardize, centralize and 
streamline our operations. These efforts have resulted in 
greater reliance on technological tools such as: an 
enterprise resource planning system, an automated 
dispatch system, an automated meter reading system, a 
customer information system, and other similar 
technological tools and initiatives. The failure of any of these 
or other similarly important technologies, or our inability to 
have these technologies supported, updated, expanded or 
integrated into other technologies, could adversely impact 
our operations. Additionally, our utility could experience 
breaches of security pertaining to sensitive customer, 
employee and vendor information maintained by the utility in 
the normal course of business. which could adversely affect 
the utility’s reputation, diminish customer confidence, disrupt 
operations, and subject us to possible financial liability or 
increased regulation or litigation, any of which could 
adversely affect our financial condition and results of 
operations.

Furthermore, we rely on information technology systems in 
our operations of our distribution and storage operations. 
There are various risks associated with these systems, 
including, hardware and software failure, communications 
failure, data distortion or destruction, unauthorized access 
to data, misuse of proprietary or confidential data, 
unauthorized control through electronic means, 
programming mistakes and other inadvertent errors or 
deliberate human acts. In particular, cyber security attacks, 
terrorism or other malicious acts could damage, destroy or 
disrupt all of our business systems. Any failure of 
information technology systems could result in a loss of 
operating revenues, an increase in operating expenses and 
costs to repair or replace damaged assets. As these 
potential cyber security attacks become more common and 
sophisticated, we could be required to incur costs to 

19

strengthen our systems or obtain specific insurance 
coverage against potential losses.

Risks Related Primarily to Our Gas Storage Business
LONG-TERM LOW OR STABILIZATION OF GAS PRICE RISK. 
Any significant stabilization of natural gas prices or long-
term low gas prices could have a negative impact on the 
demand for our natural gas storage services, which could 
adversely affect our financial results.

Storage businesses benefit from price volatility, which 
impacts the level of demand for services and the rates that 
can be charged for storage services. On a system-wide 
basis, natural gas is typically injected into storage between 
April and October when natural gas prices are generally 
lower and withdrawn during the winter months of November 
through March when natural gas prices are typically higher. 
Largely due to the abundant supply of natural gas made 
available by hydraulic fracturing techniques, natural gas 
prices have dropped significantly to levels that are near a 
10-year low. If prices and volatility remain low or decline 
further, then the demand for storage services, and the 
prices that we will be able to charge for those services, may 
decline or be depressed for a prolonged period of time. A 
sustained decline in these prices could have an adverse 
impact on our financial condition, results of operations and 
cash flows.

NATURAL GAS STORAGE COMPETITION RISK. Increasing 
competition in the natural gas storage business could 
reduce the demand for our storage services and drive prices 
down for storage, which could adversely affect our financial 
condition, results of operation and cash flows.

Our natural gas storage segment competes primarily with 
other storage facilities and pipelines. Natural gas storage is 
an increasingly competitive business, with ongoing 
expansions and proposed construction of new storage 
capacity in California, the U.S. Rocky Mountains and 
elsewhere in the United States and Canada. Increased 
competition in the natural gas storage business could 
reduce the demand for our natural gas storage services, 
drive prices down for our storage business, and adversely 
affect our ability to renew or replace existing contracts at 
rates sufficient to maintain current revenues and cash flows, 
which could adversely affect our financial condition, results 
of operations and cash flows.

THIRD-PARTY PIPELINE RISK. Our gas storage business 
depends on third-party pipelines that connect our storage 
facilities to interstate pipelines, the failure or unavailability of 
which could adversely affect our financial condition, results 
of operations and cash flows.

Our gas storage facilities are reliant on the continued 
operation of a third-party pipeline and other facilities that 
provide delivery options to and from our storage facilities. 
Because we do not own all of these pipelines, their 
operation is not within our control. If the third-party pipeline 
to which we are connected were to become unavailable for 
current or future withdrawals or injections of natural gas due 
to repairs, damage to the infrastructure, lack of capacity or 
other reason, our ability to operate efficiently and satisfy our 
customers’ needs could be compromised, thereby 

potentially could have an adverse impact on our financial 
condition, results of operations and cash flows.

OPERATIONS AT NEW STORAGE FACILITY RISK. Operations 
at our new Gill Ranch storage facility involves numerous 
operational risks that may result in a failure to meet 
expectations or contractual obligations, additional or 
unexpected costs and other business risks that could 
adversely impact our financial condition, results of 
operations and cash flows.

In October 2010, we commenced operations at our Gill 
Ranch storage facility. Operations at a new storage facility 
involve many risks. Although we believe that Gill Ranch 
storage facility has been successfully completed to meet our 
contractual obligations and project specifications with 
respect to injection, withdrawal and gas specifications, the 
facility is new, and has a limited operating history. If we fail 
to inject or withdraw natural gas at the levels we expect or 
at contracted rates, or cannot deliver natural gas consistent 
with our expectations or contractual specifications, or 
otherwise operate as expected, or if operating costs are 
substantially higher than we expect or if we fail to control 
those costs, we may not be able to contract for storage at 
the levels and on the terms we expect, and we could incur 
higher than expected costs to satisfy our contractual 
obligations under contracts we obtain, and this could 
adversely impact our financial condition, results of 
operations and cash flows.  

replacement program under which we removed and 
replaced 100% of our cast iron mains by the end of 2000. In 
2001, we initiated an accelerated pipe replacement program 
under which we expect to eliminate all bare steel mains and 
services in the system by 2021.

Gas Storage Properties 
We hold leases and other property interests in 
approximately 12,000 net acres of underground natural gas 
storage in Oregon and approximately 5,000 net acres of 
underground natural gas storage in California, and 
easements and other property interests related to pipelines 
associates with those facilities. We own rights to depleted 
gas reservoirs near Mist, Oregon, that are continuing to be 
developed and operated as underground gas storage 
facilities. We also hold an option to purchase future storage 
rights in certain other areas of the Mist gas field in Oregon, 
as well as in California related to the Gill Ranch storage 
project.

We consider all of our properties currently used in our 
operations, both owned and leased, to be well maintained, 
in good operating condition, and, along with planned 
additions, adequate for our present and foreseeable future 
needs.

Our Mortgage and Deed of Trust (Mortgage) is a first 
mortgage lien on substantially all of the property constituting 
our utility plant.

ITEM 1B. UNRESOLVED STAFF COMMENTS

ITEM 3. LEGAL PROCEEDINGS

Other than the proceedings disclosed in Note 15 and as 
discussed below, we have only nonmaterial litigation in the 
ordinary course of business.

In December 2010, NW Natural commenced litigation 
against certain of its historical liability insurers in Multnomah 
County Circuit Court, State of Oregon, Case Number 
1012-17532. The defendants include Associated Electric & 
Gas Insurance Services Limited, Allianz Global Risk US 
Insurance Company, certain underwriters at Lloyd's London, 
certain London market insurance companies and 10 other 
insurance companies. In the suit, NW Natural alleges that 
the defendant insurance companies issued third party 
liability insurance policies to NW Natural and that the 
defendants have breached the terms of those policies by 
failing to reimburse and indemnify NW Natural for liabilities 
arising from environmental contamination at certain sites 
caused or alleged to be caused by its historical operations. 
NW Natural seeks damages in excess of $50 million in 
losses it has incurred to date, as well as declaratory relief 
for additional losses it expects to incur in the future. 

ITEM 4. MINE SAFETY DISCLOSURES

Not applicable.

We have no unresolved comments.

ITEM 2. PROPERTIES

Utility Properties
Our natural gas pipeline system consists of approximately 
14,000 miles of distribution and transmission mains located 
in our service territory in Oregon and Washington. In 
addition, the piping system includes service pipelines, 
meters and regulators, and gas regulating and metering 
stations. Pipeline mains are located in municipal streets or 
alleys pursuant to valid franchise or occupation ordinances, 
in county roads or state highways pursuant to valid 
agreements or permits granted pursuant to statute, or on 
lands of others pursuant to valid easements obtained from 
the owners of such lands. We also hold all necessary 
permits for the crossing of numerous navigable waterways 
and smaller tributaries throughout our entire service 
territory.

We own service building facilities in Portland, as well as 
various satellite service centers, garages, warehouses and 
other buildings necessary and useful in the conduct of our 
business. We also lease office space in Portland for our 
corporate headquarters, which expires on May 31, 2018. 
Resource centers are maintained on owned or leased 
premises at convenient points in the distribution system to 
provide service within our utility service territory. We also 
own LNG storage facilities in Portland and near Newport, 
Oregon.

In order to reduce risks associated with gas leakage in older 
parts of our system, we undertook an accelerated pipe 

20

 
  
  
 
 
  
PART II

ITEM 5. MARKET FOR THE REGISTRANT’S COMMON EQUITY, RELATED STOCKHOLDER MATTERS 
AND ISSUER PURCHASES OF EQUITY SECURITIES

Our common stock is listed and trades on the New York Stock Exchange under the symbol “NWN.”

The high and low trades for our common stock during the past two years were as follows:

Quarter Ended

March 31

June 30

September 30

December 31

2012

2011

High

Low

High

Low

$

49.49

$

44.40

$

48.72

$

48.56

50.16

50.80

43.90

46.04

41.01

46.40

46.77

48.98

43.92

43.57

39.63

42.52

The closing quotations for our common stock on December 31, 2012 and 2011 were $44.20 and $47.93, respectively. 

As of February 22, 2013, there were 6,366 holders of record of our common stock.

We have paid quarterly dividends on our common stock in each year since the stock first was issued to the public in 1951. 
Annual common dividend payments per share, adjusted for stock splits, have increased each year since 1956. Dividends per 
share paid during the past two years were as follows:

Payment Date

February 15

May 15

August 15

November 15

Total per share

2012

2011

$

$

0.445

$

0.445

0.445

0.455

1.790

$

0.435

0.435

0.435

0.445

1.750

The amount and timing of dividends payable on our common stock are within the sole discretion of our Board of Directors. 
Subject to Board approval, we expect to continue paying cash dividends on our common stock on a quarterly basis. However, 
the declaration and amount of future dividends depend upon our earnings, cash flows, financial condition and other factors.

The following table provides information about purchases of our equity securities that are registered pursuant to Section 12 of 
the Securities Exchange Act of 1934 during the quarter ended December 31, 2012:

Period

Balance forward

10/01/12-10/31/12

11/01/12-11/30/12

12/01/12-12/31/12

Total

Issuer Purchases of Equity Securities

Total Number
of Shares Purchased(1)

Average
Price Paid per Share

Total Number of Shares
Purchased as Part of
Publicly Announced 
Plans or Programs(2)

Maximum Dollar Value of
Shares that May Yet Be
Purchased Under the 
Plans or Programs(2)

2,124,528

$

16,732,648

— $

3,114

—

3,114

$

—

42.75

—

42.75

—

—

—

—

—

—

2,124,528

$

16,732,648

(1)  During the quarter ended December 31, 2012, 3,114 shares of our common stock were purchased on the open market to meet the 

requirements of our share-based programs. During the quarter ended December 31, 2012, no shares of our common stock were accepted 
as payment for stock option exercises pursuant to our Restated Stock Option Plan (Restated SOP).

(2)  We have a common stock share repurchase program under which we purchase shares on the open market or through privately negotiated 
transactions. We currently have Board authorization through May 31, 2013 to repurchase up to an aggregate of 2.8 million shares or up to 
an aggregate of $100 million. During the quarter ended December 31, 2012, no shares of our common stock were repurchased pursuant to 
this program. Since the program’s inception in 2000, we have repurchased approximately 2.1 million shares of common stock at a total cost 
of approximately $83.3 million.

21

 
  
 
 
 
ITEM 6. SELECTED FINANCIAL DATA

In thousands, except share data

2012

2011

2010

2009

2008

Operating revenues

Net income

$

730,607

$

828,055

$

792,115

$

988,055

$

1,012,783

59,855

63,898

72,667

75,122

69,525

For the year ended December 31,

Earnings per share of common stock:

Basic

Diluted

Dividends paid per share of common stock

$

2.23

$

2.39

$

2.73

$

2.83

$

2.22

1.79

2.39

1.75

2.73

1.68

2.83

1.60

2.63

2.61

1.52

Total assets, end of period

$

2,818,753

$

2,746,574

$

2,616,616

$

2,399,252

$

2,378,152

Total equity

Long-term debt

733,033

691,700

714,488

641,700

693,101

591,700

660,105

601,700

628,373

512,000

22

 
 
 
 
 
ITEM 7. MANAGEMENT'S DISCUSSION AND 
ANALYSIS OF FINANCIAL CONDITION AND 
RESULTS OF OPERATIONS

The following is management’s assessment of Northwest 
Natural Gas Company’s (NW Natural or the Company) 
financial condition, including the principal factors that affect 
results of operations. The discussion refers to our 
consolidated activities for the years ended December 31, 
2012, 2011, and 2010. References in this discussion to 
"Notes" are the Notes to Consolidated Financial Statements 
in Item 8 of this report.

The consolidated financial statements include NW Natural 
and its direct and indirect wholly-owned subsidiaries which 
include: 
•  NW Natural Energy, LLC (NWN Energy), 
•  NW Natural Gas Storage, LLC (NWN Gas Storage),
•  Gill Ranch Storage, LLC (Gill Ranch), and 
•  NNG Financial Corporation (NNG Financial). 

These statements also include our equity investment in 
Palomar Gas Holdings, LLC (PGH), which is pursuing the 
development of a proposed natural gas pipeline through its 
wholly-owned subsidiary Palomar Gas Transmission, LLC 
(Palomar), and NNG Financial's investment in KB Pipeline. 
These entities make up our regulated local gas distribution 
business, our regulated gas storage businesses, and other 
regulated and non-regulated investments primarily in 
energy-related businesses. In this report, the term “utility” is 
used to describe our regulated gas distribution business 
(local distribution company), and the term “non-utility” is 
used to describe our gas storage businesses (gas storage) 
and other business segments. For a further discussion of 
our business segments, see Note 4.

In addition to presenting results of operations and earnings 
amounts in total, certain financial measures are expressed 
in cents per share, which are non-GAAP financial 
measures. These amounts reflect factors that directly 
impact earnings. In calculating these financial disclosures, 
we allocate income tax expense based on the effective tax 
rate, where applicable. All references in this section to 
earnings per share are on the basis of diluted shares. 

We use such non-GAAP measures in analyzing our 
financial performance because we believe they provide 
useful information to our investors and creditors in 
evaluating our financial condition and results of operations.

EXECUTIVE SUMMARY

In 2012, we advanced the following core company 
initiatives:
• 

the Oregon general rate case was completed with key 
regulatory mechanisms renewed including our 
decoupling and weather normalization mechanisms and 
system integrity program. Several items in the case 
were delayed to separate dockets, and we will continue 
to work to resolve these items in 2013. Delayed items 
included interstate storage revenue sharing, working 
gas inventory, and a pension cost recovery mechanism. 
In addition, the earnings test for our new environmental 
Site Remediation and Recovery Mechanism (SRRM) 

• 

• 

will be defined and a prudence review will be 
performed; 
safety initiatives moved forward including the launch of 
our emergency contact center dedicated exclusively to 
responding to emergency calls and the opening of a 
new industry-leading training facility; and
customer growth and satisfaction continued to remain 
high with our growth rate at 0.9% for 2012 and J.D. 
Power and Associates ranked us in the top two utilities 
for customer satisfaction in the West for the ninth year 
in a row.

While we accomplished many goals in 2012, we look 
forward to further opportunities to safely provide service to 
our customers, work with regulators, and grow our business 
in 2013. See "2013 Outlook" below for more information.     

Key financial highlights include:

In millions, except per 
share data

2012

2011

2010

Consolidated net income

$

59.9

$

63.9

$

72.7

Consolidated earnings 
per share (EPS)

2.22

2.39

2.73

Utility margin

$

344.5

$

343.0

$

346.1

Results for 2012: 
• 

• 

• 

net income decreased primarily due to higher utility 
operations and maintenance, and depreciation 
expenses, as well as a one-time tax charge resulting 
from the Oregon general rate case;
gas storage income increased primarily due to higher 
revenues reflecting additional capacity at our Gill Ranch 
gas storage facility; and
utility margins increased primarily due to a $7.4 million 
net charge in 2011 related to a utility tax law change in 
Oregon, as well as residential and commercial 
customer growth, partially offset by a decrease in 
margin due to timing differences from the new billing 
rate structure resulting from the Oregon general rate 
case and the effects of warmer weather. 

See "Consolidated Earnings and Dividends" below for 
additional detail.

2013 OUTLOOK

With increased domestic supply of natural gas and lower 
prices, 2013 affords many opportunities for the natural gas 
industry and NW Natural. We remain committed to providing 
safe, reliable gas service to customers while growing our 
core businesses and exploring additional natural gas 
service needs and markets. Safety for our customers, 
employees, and communities is at the center of our 
activities.

GROW CORE BUSINESSES. Our primary businesses are 
utility and gas storage. In the utility, we continue to leverage 
our resources to provide natural gas services to our 
residential, commercial, and industrial customers. In 
particular, we will continue working with industrial customers 
to convert legacy oil heating systems to natural gas. In our 
gas storage business, we will focus on maximizing our 
storage capacity and optimizing revenue opportunities. We 
believe that investing in operating efficiencies and marketing 

23

 
  
opportunities for our core businesses positions us well for 
growth now and into the future.

ENSURE SAFETY. Safety is at the core of everything we do. 
We strive to provide our employees industry-leading safety 
training facilities, effective safety policies, procedures, and 
equipment, and foster a work environment that emphasizes 
safety in all areas. Maintaining a safe infrastructure and 
effective emergency response program is key to providing 
safe and reliable natural gas service to our customers. That 
is why we continue to focus on and invest in our system 
integrity program (SIP), emergency response system, 
training facilities and programs, and pipeline and system 
improvements.

ENHANCE STRATEGIC POSITION. The decline in natural gas 
prices and abundance of supplies creates opportunities for 
our utility business as we leverage natural gas' competitive 
price advantage. Our gas storage facilities are challenged 
by current market conditions, but we are strategically 
positioning ourselves to quickly respond to increasing 
market demand as the economy improves or gas prices 
become more volatile. Together, our businesses are 
competitively positioned to meet growing market demands. 

ADVANCE KEY PROJECTS. We seek to create shareholder 
value by innovatively addressing the needs of our 
customers, employees, and the communities we serve while 
addressing economic, regulatory, and environmental 
challenges. To that end, we are advancing key business 
projects such as key rate mechanisms, pursuing storage 
development opportunities at Mist, and evaluating 
opportunities to create value and improve our Gill Ranch 
operations and revenues. We also continue to pursue 
regional solutions for reliable and safe energy needs 
through our investment in natural gas cross-Cascades 
pipeline infrastructure.

EXPLORE NEW SERVICE OPPORTUNITIES. We believe our 
utility business is strategically and competitively positioned 
with the decline in natural gas prices and the abundance of 
supplies. Natural gas is competitively priced in the energy 
market and compliments wind and solar renewable energy 
options as a reliable, on-call, electric generation resource. 
Therefore, we will be exploring new opportunities to serve 
customers with natural gas such as gas storage for wind 
following electric generation plants and natural gas for the 
vehicle transportation fuel market. We are also investigating 
expanded service offerings for our existing utility customers 
to ensure customer needs are met. We remain committed to 
continuous improvement and providing innovative and high 
quality service. 

Issues, Challenges and Performance Measures 
ECONOMY. The local, national, and global economies 
continued to show signs of weakness during 2012 and have 
impacted utility customer growth, business demand for 
natural gas and market prices for gas storage. Our utility’s 
customer growth rate was 0.9% in 2012, compared to 
growth of 0.8% in 2011 and 0.9% in 2010. The local 
economy is beginning to show signs of a slow recovery as 
unemployment rates in our region dropped from 
approximately 9% in 2011 to about 8% at the end of 2012, 
and industrial gas use increased in 2012 by 1% over 2011. 
We believe our utility is well positioned to continue adding 

customers and to serve increasing industrial demand as the 
economy recovers because of low, stable natural gas 
prices, our relatively low market penetration, and our 
ongoing marketing focus of converting homes and 
businesses to natural gas. In addition, environmental 
initiatives that favor lower carbon emissions and lower cost 
energy alternatives, such as natural gas, could increase 
demand for our services in the future.

GAS PRICES AND SUPPLIES. Our gas acquisition strategy is 
to secure sufficient supplies of natural gas to meet the 
needs of our utility customers and to hedge gas prices so 
we can effectively manage costs, reduce price volatility, and 
maintain a competitive price advantage. With recent 
developments in drilling technologies and substantial 
access to supplies around the U.S. and in Canada, the 
current outlook for North American natural gas supply is 
strong and is projected to remain this way well into the 
future. The continuation of low and stable gas prices in the 
future depends on a combination of supply outlook and 
demand factors as well as a regulatory environment that 
continues to support hydraulic fracturing and other drilling 
technologies.

Our utility's annual Purchased Gas Adjustment (PGA) 
mechanisms in Oregon and Washington, combined with our 
gas price hedging strategies, enable us to reduce earnings 
exposure for the Company and secure lower gas costs for 
our customers. See “Regulatory Matters—Rate 
Mechanisms—Purchased Gas Adjustment” below.

We typically hedge gas prices on approximately 75% of our 
utility's annual sales requirement based on average 
weather, including both physical and financial hedges. We 
entered the 2012-13 gas year (November 1, 2012 – October 
31, 2013) hedged at approximately 75% of our forecasted 
sales volumes, including 47% in financial swap and option 
contracts and 28% in physical gas supplies. The physical 
hedges consisted of a combination of gas inventories in 
storage, local production from the Mist area, and production 
from gas reserves. For further discussion of gas reserves, 
see "Strategic Opportunities—Gas Reserves" and "Results 
of Operations—Regulatory Matters—Rate Mechanisms—
Gas Reserves" below.

In addition to the amount of gas hedged for the current gas 
contract year, as of December 31, 2012 we are also hedged 
at approximately 22% for the 2013-14 gas year and 
between 8% and 24% for annual requirements over the 
following five gas years. Our hedge levels are subject to 
change based on actual load volumes, which depend to a 
certain extent on weather and economic conditions. Also, 
our storage inventory levels may increase or decrease 
based on storage expansion, storage contracts with third 
parties, or storage recall by the utility. 

Although less expensive and more stable gas prices provide 
opportunities to manage costs for our utility customers, they 
also present challenges for our gas storage businesses by 
lowering the price of, and reducing the demand for, storage 
services. Consequently, our ability to sign longer-term 
storage contracts with customers at favorable prices affects 
our financial results. However, if there is an increase in 
demand for natural gas and/or a decrease in drilling activity, 
there may be upward pressure on gas prices or price 

24

  
 
volatility which may result in increased demand and prices 
for storage services. In the short-term, we strive to find 
opportunities for increasing revenues, lowering costs and 
developing enhanced services for storage customers.

ENVIRONMENTAL COSTS. We accrue all material 
environmental loss contingencies related to environmental 
sites for which we are responsible. Due to numerous 
uncertainties surrounding the nature of environmental 
investigations and the development of remediation solutions 
approved by regulatory agencies, actual costs could vary 
significantly from our loss estimates. As a regulated utility, 
we have been allowed to defer certain costs pursuant to 
regulatory actions. In our general rate case, the Public Utility 
Commission of Oregon (OPUC) approved our recovery of 
costs from environmental site remediation subject to certain 
conditions as noted in "Results of Operations—Regulatory 
Matters—Rate Mechanisms" below. 

We are pursuing recovery from insurance policies through 
litigation and only seek recovery from customers for 
amounts not covered by insurance. Ultimate recovery of 
environmental costs from regulated utility rates will depend 
on our ability to effectively manage these costs, 
demonstrate that costs were prudently incurred, and the 
impact of any earnings test the OPUC is expected to adopt 
in a subsequent proceeding. Cost recovery and carrying 
charges on amounts charged to Washington customers will 
be determined in a future proceeding. Based on these future 
proceedings, recovery may vary significantly from amounts 
currently recorded as regulatory assets, and amounts not 
recovered would be required to be charged to income in the 
period they were deemed to be unrecoverable. See Note 
15.

CLIMATE CHANGE. We recognize that we are likely to be 
impacted by future carbon constraints. To address possible 
constraints, we are seeking clean energy growth 
opportunities that position us for long-term success in a 
lower carbon energy economy and to advance our 
customers’ interests in energy conservation, efficiency and 
environmental stewardship. A variety of federal, state, local 
and international climate change initiatives, including new 
regulations, are underway, but we cannot determine the 
impact of these initiatives at this time. For example, an array 
of Environmental Protection Agency (EPA) rules impacting 
coal plants may drive some coal plants to shut down early 
although the EPA is not mandating coal plant closures. Coal 
plant shut downs could increase the demand for natural gas 
as a lower carbon emission fuel and create opportunities for 
us. Similarly, because natural gas has a relatively low 
carbon content, it is also possible that future carbon 
constraints could create additional demand for natural gas 
for base load electric generation, direct use in homes and 
businesses, backing up intermittent renewable resources, 
and as a transportation fuel to displace gasoline and diesel 
fuels. 

As required under EPA greenhouse gas regulations, we 
annually report our system throughput and unintended 
greenhouse gas releases. While our CO2 equivalent 
emission levels are relatively small, the adoption and 
implementation of any regulations imposing reporting 
obligations, or limiting emissions of greenhouse gases 
associated with our operations, could result in an increase 

in the prices we charge our customers or a decline in the 
demand for natural gas.

PERFORMANCE MEASURES. In order to deal with the 
challenges affecting our businesses, we annually review 
and update our strategic plan to map out a course for the 
next several years. Our plan includes strategies for: 
growing our utility services and operations; 
• 
exploring new service opportunities in the natural gas 
• 
industry; 
optimizing and growing our non-utility gas storage 
businesses; 
investing in natural gas infrastructure as needed to 
support the energy needs of our region; and 

• 

• 

•  maintaining a leadership role in the gas utility industry 

by advancing long-term energy policies.

We intend to measure our performance and monitor 
progress on relevant metrics including, but not limited to:
• 
• 
• 
• 

earnings per share growth;
utility margin;
return on equity (ROE); and
various other operational metrics.

Strategic Opportunities
SAFETY, RELIABILITY, AND SERVICE. We are committed to 
customer and employee safety, operational effectiveness, 
service quality, and capitalizing on our competitive position. 
Therefore, we have several ongoing initiatives designed to 
improve the quality and integrity of our pipeline 
infrastructure, and have upgraded several facilities to 
enhance business continuity, employee training and safety, 
productivity, and energy efficiency. In addition, we opened a 
separate emergency contact center in 2012, which 
increased our ability to effectively respond to emergencies. 
Our initiatives in 2013 will further enhance our commitment 
to safety. The Company has increased staffing levels in the 
areas of pipeline safety, emergency response, regulatory 
compliance, field training, and customer service to respond 
to new federal pipeline safety legislation and system 
integrity requirements as well as customer expectations for 
service responsiveness. 

GAS STORAGE. We own and operate two underground gas 
storage facilities—the Mist facility in Oregon and the Gill 
Ranch facility near Fresno, California. Storage operations 
benefit from seasonal swings in commodity pricing and 
market volatility. Our storage facilities position us to 
capitalize on rising demand for natural gas, higher gas 
prices or increased market volatility. Currently natural gas 
prices remain relatively low and stable; however, if there is 
an increase in demand for natural gas and/or a decrease in 
drilling activity, there may be upward pressure on gas prices 
and price volatility may return. We have the ability to expand 
both facilities beyond their current capacities.

The Pacific Northwest storage market is also impacted by 
lower gas prices and lack of gas price volatility, although 
less than California because there are fewer regional 
competitors. Nevertheless, we continue to plan for 
expansion at Mist in anticipation of increased natural gas 
demand for energy generation in the Pacific Northwest. In 
2012, a request for proposal (RFP) to provide additional 
electric generation was sent out by Portland General 
Electric (PGE). PGE's bid was recently selected for this 

25

 
project. We have an agreement to provide gas storage 
services to PGE as part of this project, subject to several 
conditions including NW Natural receiving regulatory 
approval. 

In addition, we estimate that the current Gill Ranch storage 
facility could support an additional 20 Bcf of storage 
capacity, bringing the total storage capacity to 40 Bcf, of 
which our rights would give us at least an additional 5 Bcf or 
ownership of a total of approximately 20 Bcf. An expansion 
at the Gill Ranch storage facility would require certain 
infrastructure modifications, but no further expansion of our 
gas transmission pipeline. See Note 4 for more information 
on our current gas storage facilities.

PIPELINE DIVERSIFICATION. Currently, our utility operations 
and gas storage operations at Mist depend on a single bi-
directional interstate transmission pipeline to ship gas 
supplies to customers. This is why we continue to work with 
regulators and utilities in the Pacific Northwest to advance a 
new integrated, regional cross-Cascades pipeline through 
our Palomar investment. 

The proposed pipeline would be regulated by the Federal 
Energy Regulatory Commission (FERC). Palomar intends to 
file an application with FERC for a pipeline delivering gas 
from the GTN pipeline near Madras in central Oregon to a 
NW Natural hub near Molalla, Oregon. The application will 
be filed after NW Natural has completed resource plans and 
Palomar has conducted a new open season to obtain 
commercial support for the pipeline. The approval and 
timing of potential construction of the pipeline will depend on 
the project being competitive with alternative Pacific 
Northwest pipeline projects, obtaining regulatory permits, 
and garnering the necessary commercial support from 
shippers. See Note 12 for further discussion.

GAS RESERVES. In addition to hedging gas prices with 
financial derivative contracts, we entered into an agreement 
with Encana Oil & Gas (USA) Inc. (Encana) in 2011 to 
hedge a portion of our Oregon utility customers’ cost of gas 
over 30 years through working interests in gas leases. 
These working interests are in a gas field located in Sublette 
County, Wyoming. During the first 10 years of the contract, 
we forecast the volumes of gas to be produced under the 
gas reserves agreement as sufficient to hedge 
approximately 8% to 10% of the average annual utility gas 
supply requirements. The gas reserves transaction is 
expected to hedge approximately 8% of our utility gas 
supply for the 2012-13 gas year. We receive certain federal 
tax deductions for drilling costs incurred under our gas 
reserves agreements. The timing of when we realize these 
federal tax benefits has been affected by net operating 
losses for tax purposes, which will be carried forward to 
reduce our current tax liability in future years. We continue 
to evaluate additional investments in gas reserves as part of 
our gas hedging strategy. See "Results of Operations—
Regulatory Matters—Rate Mechanisms—Gas Reserves" 
below.

CONSOLIDATED EARNINGS AND DIVIDENDS

Consolidated Earnings
Consolidated highlights include:

In millions, except EPS 
data

Net income

EPS

2012

2011

2010

$

$

59.9

2.22

$

$

63.9

2.39

$

$

72.7

2.73

Return on equity

8.3%

9.1%

10.7%

2012 COMPARED TO 2011. The primary factors contributing 
to the $4.0 million decrease in consolidated net income 
were:
• 

a $4.1 million increase in operations and maintenance 
expense primarily due to increases in utility payroll and 
employee benefit costs, utility training costs, and utility 
expenses related to our Oregon general rate case;
a $3.0 million increase in depreciation and amortization 
expenses primarily due to higher levels of investment in 
property, plant, and equipment at the utility; and
a $2.7 million after-tax charge to income tax expense 
related to a regulatory disallowance from the Oregon 
general rate case. 

• 

• 

Partially offsetting the above factors were:
• 

a $1.6 million increase in utility margin primarily due to 
a $7.4 million net charge in 2011 results related to a 
utility tax law change in Oregon  as well as residential 
and commercial customer growth, partially offset by a 
decrease in margin primarily due to timing differences 
from the new billing rate structure resulting from the 
Oregon general rate case and the effects of warmer 
weather;
a $4.1 million increase in gas storage operating income 
primarily attributable to revenue increases from 
additional contracted storage capacity at Gill Ranch, 
partially offset by $2.8 million increase in interest 
expense due to the full year impact of Gill Ranch notes; 
and
a $0.9 million increase in net income from our other 
non-utility business segment.

• 

• 

2011 COMPARED TO 2010. The most significant factors 
contributing to the $8.8 million decrease in consolidated net 
income were:
• 

a $7.2 million net charge against utility margin taken in 
2011, plus the $7.7 million of utility margin revenues 
accrued in 2010, related to the repeal of Oregon’s 
legislative rule on utility income taxes;
a $5.4 million increase in general taxes, primarily due to 
a $5.2 million refund of utility property taxes received in 
2010, partially offset by a $0.9 million decrease in other 
taxes at the utility, and a $1.3 million increase in 
property and other taxes at Gill Ranch;
a $4.9 million increase in depreciation and amortization 
expense, due to a $1.2 million increase at the utility and 
a $3.7 million increase at Gill Ranch; and
a $4.3 million increase in operations and maintenance 
expense, primarily due to a $3.2 million increase at Gill 
Ranch reflecting first-year operating expenses.

• 

• 

• 

26

Partially offsetting the above factors was:
• 

an $11.3 million increase in utility margin attributable to 
an increase in customers gas use, reflecting gains from 
colder weather, customer growth and a slight increase in 
industrial demand; and a $6.1 million decrease in income 
tax expense related to lower taxable income.

Dividends
Dividend highlights include:  

Per common share

Dividends paid

2012

2011

2010

$

1.79

$

1.75

$

1.68

The Board of Directors declared a quarterly dividend on our 
common stock of 45.5 cents per share, payable on February 
15, 2013, reflecting an indicated annual dividend rate of 
$1.82 per share.

RESULTS OF OPERATIONS

Regulatory Matters

Regulation and Rates 
UTILITY. Our utility business is subject to regulation with 
respect to, among other matters, rates, terms of service, 
and systems of accounts set by the OPUC, Washington 
Utilities and Transportation Commission (WUTC), and 
FERC. The OPUC and WUTC also regulate the issuance of 
securities by our utility. In 2012, approximately 90% of our 
utility gas volumes and revenues were derived from Oregon 
customers, with the remaining 10% from Washington 
customers. Earnings and cash flows from utility operations 
are largely determined by rates set in rate cases and other 
proceedings in Oregon and Washington, but will also be 
affected by the economies in Oregon and Washington, by 
the pace of customer growth in the residential and 
commercial markets, and by our ability to remain price 
competitive, control expenses, and obtain reasonable and 
timely regulatory recovery of our utility-related costs, 
including operating expenses and investment costs in utility 
plant and other regulatory assets. See "General Rate 
Cases" below.

GAS STORAGE. Our gas storage business is subject to 
regulation with respect to, among other matters, issuance of 
securities and systems of accounts set by the OPUC, 
California Public Utilities Commission (CPUC), and FERC. 
The OPUC and FERC regulate intrastate and interstate 
storage services, respectively, under a maximum cost of 
service model which allows for storage prices to be set at or 
below the cost of service as approved by each agency in 
the last regulatory filing. The CPUC regulates Gill Ranch 
under a market-based rate model which allows for the price 
of storage services to be set by the marketplace. In 2012, 
approximately 54% of our storage revenues were derived 
from FERC and Oregon regulated operations and 
approximately 46% from California operations.

General Rate Cases  
OREGON. Our most recent general rate case in Oregon was 
completed in 2012, and in it the OPUC authorized rates to 
customers based on an ROE of 9.5% and an overall rate of 
return of 7.78% with a capital structure of 50% common 

equity and 50% long-term debt. These customer rates went 
into effect on November 1, 2012, with annual revenue 
requirements increasing by $8.7 million or 1.2%. However, 
this increase included the recovery of amounts that had 
previously been deferred through the Company's 
decoupling mechanism of about $15 million. As a result, the 
overall effect on the Company was a decline in utility margin 
of approximately $6 million on an annualized basis.

• 

The following items were postponed by the Commission:
• 
the request to include prepaid pension assets in rate 
base and allow a return on and recovery of the asset 
was denied; however, the OPUC indicated in the order 
that it will open a docket to review the treatment of 
pension expense on a general, non-utility-specific 
basis. A docket has been opened and until a conclusion 
is reached, the OPUC has authorized us to continue to 
collect and defer pension costs as we have historically, 
as outlined below;
the existing arrangement we use to share revenues 
with customers from our Mist interstate storage 
operations and optimization services was continued, 
but a new docket will be opened to review the sharing 
arrangement; and
the use of a new process to determine the appropriate 
amounts of working gas inventory that we earn a return 
on, and its corresponding rate of return. Included in the 
rate decrease effective November 1, 2012 was a 
reduction in margin of about $4 million related to 
working gas inventory, which we have been authorized 
to defer pending the outcome in a new docket.

• 

In addition, to the items above, the earnings test for our new 
SRRM will also be defined in a separate proceeding and a 
prudence review will be performed. A decision on these 
items is expected in 2013, with the working gas inventory 
decision expected to be applied retroactively to November 
1, 2012.

WASHINGTON. Our most recent general rate case in 
Washington was in 2008, and in it the WUTC authorized 
rates to customers based on an ROE of 10.1% and an 
overall rate of return of 8.4% with a capital structure of 51% 
common equity, 5% short-term debt, and 44% long-term 
debt. These customer rates went into effect on January 1, 
2009, with annual revenue requirements increased by $2.7 
million or 3%.

FERC JURISDICTION. We are required under our Mist 
interstate storage certificate authority and rate approval 
orders to file every five years either a petition for rate 
approval or a cost and revenue study to change or justify 
maintaining the existing rates for our interstate storage 
services. Our most recent filing of a cost and revenue study 
was in April 2008. As a result of that proceeding, the current 
maximum cost-based rates for our interstate gas storage 
services were approved by FERC, with maximum rates 
unchanged from prior levels approved by FERC in 2005. In 
addition, we made a filing in December 2008 to obtain 
FERC approval to revise the depreciation rates associated 
with Mist assets used to derive the cost-based interstate 
storage rates. These new depreciation rates were designed 
to match the depreciation rates for the same type of assets 
approved under state regulation. We did not make any 
changes to the previously approved maximum rates, and 

27

 
  
FERC approved the depreciation rate filing in May 2009. We 
are required to make our next cost and revenue study filing 
at FERC on or before December 11, 2013.

CALIFORNIA. Gill Ranch is authorized by the CPUC to 
charge market-based rates for the intrastate storage 
services offered to customers in California.

Rate Mechanisms
PURCHASED GAS ADJUSTMENT. Rate changes are 
established for the utility each year under PGA mechanisms 
in Oregon and Washington to reflect changes in the 
expected cost of natural gas commodity purchases. This 
includes gas prices under spot purchases as well as 
contract supplies, gas prices hedged with financial 
derivatives, gas prices from the withdrawal of storage 
inventories, and the production of gas reserves, interstate 
pipeline demand costs, the application of temporary rate 
adjustments, which amortize balances of deferred 
regulatory accounts, and the removal of temporary rate 
adjustments effective for the previous year.

In October 2012, the OPUC authorized PGA rate changes 
effective November 1, 2012. The effect of these rate 
changes was to decrease the average monthly bills of 
Oregon residential customers by about 7%. This was our 
fourth consecutive year of PGA rate decreases, and 
cumulatively our Oregon utility residential customer bills 
have declined 26% since 2008.

In October 2012, the WUTC PGA rates were allowed to go 
into effect on November 1, 2012. However, the WUTC also 
ordered a continuing review of all Washington gas 
companies' PGA filings. We do not anticipate any changes 
to our PGA rates as filed; however, if the WUTC were to find 
any of our hedges to be imprudent, rates could be adjusted 
as a result of this review. The effect of the ordered PGA 
rates was to decrease average monthly bills of Washington 
residential customers by about 8%. This was our fourth 
consecutive year of PGA rate decreases in Washington, and 
cumulatively our Washington utility residential customer bills 
have declined 34% since 2008.  

Under the current PGA mechanism in Oregon, there is an 
incentive sharing provision whereby we are required to 
select each year either an 80% deferral or a 90% deferral of 
higher or lower actual gas costs compared to estimated 
PGA prices, such that the impact on current earnings from 
the incentive sharing is either 20% or 10% of the difference 
between actual and estimated gas costs, respectively. 
Under the Washington PGA mechanism, we defer 100% of 
the higher or lower actual gas costs, and those gas cost 
differences are normally passed on to customers through 
the annual PGA rate adjustment. See “Customer Credits for 
Gas Cost Incentive Sharing” below for a discussion of our 
utility’s early refund to customers of deferred gas cost 
savings from November 1, 2011 through March 31, 2012.
In addition to the gas cost incentive sharing mechanism, we 
are subject to an annual earnings review in Oregon to 
determine if the utility is earning above its authorized ROE 
threshold. If utility earnings exceed a specific ROE level, 
then 33% of the amount above that level is required to be 
deferred for refund to customers. Under this provision, if we 
select the 80% deferral option, then we retain all of our 
earnings up to 150 basis points above the currently 

28

authorized ROE. If we select the 90% deferral option, then 
we retain all of our earnings up to 100 basis points above 
the currently authorized ROE. We selected the 90% deferral 
option for the 2010-2011, 2011-2012 and 2012-2013 PGA 
years. The ROE threshold is subject to adjustment annually 
based on movements in long-term interest rates. For 
calendar years 2010 and 2011, the ROE threshold after 
adjustment for long-term interest rates was 11.02% and 
10.92%, respectively. We refunded $0.2 million to 
customers based on the 2010 utility earnings test, and 
based on the recently approved PGA, we are refunding $0.7 
million to customers based on the 2011 utility earnings test. 
We do not expect to be subject to a refund for the 2012 
earnings test year.

GAS RESERVES. In 2011 the OPUC approved the Encana 
gas reserve transaction to provide long-term gas price 
protection for our utility customers and determined that the 
Company's costs under the agreement will be recovered, 
plus a rate base return on our investment, on an ongoing 
basis through our annual PGA mechanism, including the 
regulatory deferral and incentive sharing process for the 
commodity cost of gas. Gas produced from our interests is 
sold by Encana at then prevailing market prices with 
revenues from such sales, net of associated production 
costs, credited to our cost of gas. Annually, a forecast is 
established for the amounts related to costs, revenues, and 
volumes expected, and any variances between forecasted 
and actual results are subject to our PGA incentive sharing 
in Oregon, up to a maximum variance of $10 million of 
which 10% (or $1 million maximum) would be recognized in 
current income. Annual variances in excess of $10 million, 
both negative and positive, are deferred and passed 
through to customers in full in future rates.

DECOUPLING. Decoupling is intended to break the link 
between utility earnings and the quantity of gas consumed 
by customers, removing any financial incentive by the utility 
to discourage customers’ efforts to conserve energy.

The Oregon decoupling mechanism was reauthorized in the 
Oregon general rate case with the difference between our 
2003 baseline consumption and the consumption decided in 
our 2012 general rate case being calculated within base 
rates. The conservation tariff employs a use-per-customer 
decoupling mechanism, which adjusts margin revenues to 
account for the difference between actual and expected 
customer volumes. The margin adjustment resulting from 
differences between actual and expected volumes under the 
decoupling component is recorded to a deferral account, 
which is included in the next annual PGA filing. Baseline 
consumption reflects forecasted customer consumption data 
used in the Oregon general rate case. In Washington, 
customer use is not covered by such a tariff. See “Business 
Segments—Local Gas Distribution "Utility" Operations” 
below.

WEATHER NORMALIZATION TARIFF. In Oregon, we have an 
approved weather normalization mechanism, which is 
applied to residential and commercial customer bills. This 
mechanism is designed to help stabilize the collection of 
fixed costs by adjusting residential and commercial 
customer billings based on temperature variances from 
average weather, with rate decreases when the weather is 
colder than average and rate increases when the weather is 

 
warmer than average. The mechanism is applied to bills 
between December and May of each heating season. The 
mechanism adjusts the margin component of customers’ 
rates to reflect average weather, which uses the 25-year 
average temperature for each day of the billing period. Daily 
average temperatures and 25-year average temperatures 
are based on a set point temperature of 59 degrees 
Fahrenheit for residential customers and 58 degrees 
Fahrenheit for commercial customers. This weather 
normalization mechanism was reauthorized in the 2012 
Oregon general rate case without an expiration date. 
Customers in Oregon are allowed to opt out of the weather 
normalization mechanism, and as of December 31, 2012, 
9% had opted out. We do not have a weather normalization 
mechanism approved for Washington customers, which 
account for about 10% of our utility volumes and revenues. 
See “Business Segments—Local Gas Distribution "Utility" 
Operations” below.

INDUSTRIAL TARIFFS. The OPUC and WUTC have 
approved tariffs covering utility service to our major 
industrial customers, including terms which are intended to 
give us certainty in the level of gas supplies we need to 
acquire to serve this customer group. The terms include, 
among other things, an annual election period, special 
pricing provisions for out-of-cycle changes, and a 
requirement that industrial customers under our annual PGA 
tariff complete the term of their service election.

SYSTEM INTEGRITY PROGRAM. Since 2002, various laws 
requiring minimum standards for integrity management 
programs and SIPs for natural gas distribution pipelines 
have been enacted. Most recently, in January 2012 the 
“Pipeline Safety, Regulatory Certainty, and Job Creation Act 
of 2011” was signed into law and requires increased civil 
penalties for pipeline safety violations, improvements in 
prevention programs for pipelines, and additional review 
and analysis of various aspects of gas transmission lines. 
We are working diligently with industry associations and 
federal and state regulators to ensure our compliance with 
the provisions of this new law. 

The OPUC has approved specific accounting treatment and 
cost recovery for our transmission pipeline integrity 
management program, SIP, and the related rules adopted 
by the U.S. Department of Transportation’s Pipeline and 
Hazardous Materials Safety Administration (PHMSA) and 
provided a two-year extension of our capital expenditure 
tracking mechanism to recover capital costs related to SIP. 
We record the costs related to the integrity management 
program as either capital expenditures or regulatory assets, 
accumulate the costs over each 12-month period, and 
recover the revenue requirement associated with these 
costs, subject to audit, through rate changes effective with 
the Oregon annual PGA. Our SIP costs are tracked into 
rates annually, with rate recovery after the first $3.3 million 
of capital costs. An annual cap for expenditures has been 
set at $12 million, but extraordinary costs above the cap 
may be approved with written consent of the OPUC staff 
and other interested parties and approval of the OPUC. The 
SIP allows recovery of costs incurred through 2014. We do 
not have any special accounting or rate treatment for our 
SIP costs incurred in the state of Washington.

ENVIRONMENTAL COSTS. The OPUC has authorized us to 
defer environmental costs associated with certain named 
sites and to accrue a carrying cost on amounts deferred, 
subject to an annual demonstration that we have maximized 
our insurance recovery or made substantial progress in 
securing insurance recovery for unrecovered environmental 
expenses. Through a series of extensions, the authorized 
cost deferral and accrual of carrying costs was extended 
through January 2012. In January 2013, we filed a request 
with the OPUC to continue our deferral of these 
environmental costs. See Note 15 for further discussion of 
our regulatory and insurance recovery of environmental 
costs.

A new SRRM, authorized in the 2012 Oregon general rate 
case, allows the Company to recover prudently incurred 
environmental site remediation costs. This SRRM will allow 
recovery of one-fifth of the Company's current and future 
deferred expenses each year in rates on a rolling basis until 
all such expenses are recovered, subject to an annual 
prudence review. Recovery of these incurred costs will also 
be subject to an earnings test, which has not yet been 
defined but a docket has been opened on the matter. This 
earnings test could include deadbands, or other limitations 
based on our earnings in a year, which could reduce the 
amounts we are allowed to recover.  At this time, the OPUC 
has not ruled on how this separate earnings test will 
function. 

The WUTC has also authorized the deferral of 
environmental costs, if any, that are appropriately charged 
to Washington customers. This order was effective January 
26, 2011 with cost recovery and a carrying charge to be 
determined in a future proceeding. A decision regarding 
allocation of costs to each state is pending. See Note 15 for 
further discussion of our regulatory and insurance recovery 
of environmental costs.

PENSION COST DEFERRAL. Effective January 1, 2011, the 
OPUC approved our request to defer annual pension 
expenses above the amount set in rates, with recovery of 
these deferred amounts through the implementation of a 
balancing account, which includes the expectation of higher 
and lower pension expenses in future years. Our recovery 
of these deferred balances includes accrued interest on the 
account balance at the utility’s authorized rate of return, 
which is currently 7.78%. Future years’ deferrals will depend 
on changes in plan assets and projected benefit liabilities 
based on a number of key assumptions, and our pension 
contributions. See “Application of Critical Accounting 
Policies and Estimates,” below. As noted above, the 
Company continues to seek rate treatment for amounts 
invested in prepaid pension assets.

CUSTOMER CREDITS FOR GAS COST INCENTIVE 
SHARING. For the period between November 1, 2011 and 
March 31, 2012, our actual gas costs were significantly 
lower than the gas costs currently embedded in customer 
rates. As a result, our PGA incentive sharing mechanism 
recorded 90% of gas cost savings during this period, 
attributed to Oregon customers, and 100% of the savings 
attributed to Washington customers, to a regulatory liability 
account for credit to customers. Ordinarily, these credits 
would be refunded in customer rates starting in November 
under the next year’s PGA filing, but in April 2012 the 

29

 
  
 
Company requested regulatory approval to immediately 
refund $35.1 million and $4.2 million to our Oregon and 
Washington customers, respectively, through billing credits. 
These credits were approved, and we began crediting these 
amounts to customer bills in June of 2012. See “Purchased 
Gas Adjustment,” above.

• 

operations and maintenance expense and depreciation 
and amortization expense; and 
a $2.7 million one-time tax charge related to the 
Oregon general rate case. See "Application of Critical 
Accounting Policies and Estimates—Regulatory 
Accounting" below. 

CUSTOMER CREDITS FOR GAS STORAGE SHARING. As we 
are able and get approval from the OPUC and WUTC, we 
credit amounts to both Oregon and Washington customers 
as part of our regulatory incentive sharing mechanism 
related to gas storage and asset management services of 
pipeline capacity and gas storage at Mist. Generally 
amounts are credited to Oregon customers in June and 
credits are given to customers in Washington through their 
annual PGA filing in November. See “Business Segments—
Gas Storage” below.

The following table presents the credits to customers: 

In millions

2012

2011

2010

Oregon utility customer 
credit

Washington utility 
customer credit

$

9.2

$

12.5

$

11.0

0.8

0.9

1.2

Business Segments - Local Gas Distribution "Utility" 
Operations
Our utility margin results are largely affected by customer 
growth and, to a certain extent, by changes in volume due 
to weather and customers’ gas usage patterns because a 
significant portion of our utility margin is derived from natural 
gas sales to residential and commercial customers. In 
Oregon, we have a conservation tariff, which adjusts utility 
margin up or down through deferred accounting to offset 
changes resulting from increases or decreases in average 
use by residential and commercial customers. We also have 
a weather normalization tariff in Oregon, which adjusts 
customer bills up or down to offset changes in utility margin 
resulting from above- or below-average temperatures during 
the winter heating season. Both mechanisms are designed 
to reduce the volatility of our utility’s earnings and customer 
charges. See “Regulatory Matters—Rate Mechanisms” 
above.

Utility segment highlights include:  

Dollars and therms in 
millions, except EPS data 
and as otherwise noted

2012

2011

2010

Utility net income

EPS - utility segment

$

$

55.1

2.05

$

$

60.5

2.26

$

$

66.3

2.49

Gas sold and delivered 
(in therms)
Utility margin(1)

1,112

1,152

1,062

$

344.5

$

343.0

$

346.1

(1) See Utility Margin Table below for a reconciliation and additional 
detail.  

2012 COMPARED TO 2011. The primary factors contributing 
to the $5.4 million or $0.21 per share decrease in net 
income were as follows:
• 

an $8.4 million increase in operating expenses, 
excluding cost of gas, primarily due to higher 

These factors were partially offset by:
• 

a $1.6 million net increase in utility margin primarily due 
to:
• 

a $7.4 million one-time, pre-tax charge in 2011 
related to the repeal of Senate Bill (SB) 408, which 
did not reoccur in 2012;
a 0.9% increase in customers over last year;
a $3.4 million increase from the allowed return on 
our gas reserves investment;
a $2.5 million increase in other margin 
adjustments; and
a $1.7 million increase in contribution from our gas 
cost incentive sharing mechanism.

• 
• 

• 

• 

These increases in margin were partially offset by a 
$9.3 million decrease in our residential and commercial 
margin primarily reflecting:
• 

a $3.9 million decrease due to timing differences 
from the new billing rate structure resulting from 
the Oregon general rate case;
an $8.4 million decrease due to weather from the 
following three items: (1) positive margin impact 
realized in the second quarter of 2011 when colder 
weather was not fully offset by our Oregon weather 
normalization mechanism, (2) warmer weather 
during 2012 in Washington, which does not have 
normalization mechanisms in place, and  (3) the 
effect of warmer weather on margin for Oregon 
customers that opt out of weather normalization; 
and
a $0.5 million decrease in operating revenues 
primarily due to rate case impacts including a 
decrease in our authorized return on equity.

• 

• 

• 

• 

a $1.5 million decrease in utility interest expense due to 
lower interest rates on both short-term and long-term 
debt balances.
a $3.5 million decrease, excluding the $2.7 million one-
time tax charge mentioned above, in income taxes due 
to lower pre-tax utility income.

Total utility volumes sold and delivered in 2012 decreased 
3.5% over last year primarily due to the impact of warmer 
weather on residential and commercial use. 

2011 COMPARED TO 2010. The primary factors contributing 
to the decrease in our utility segment net income of $5.8 
million, or $0.23 per share, were as follows:
• 

a reduction in utility margins of $14.9 million related to 
the repealed Oregon legislative rule SB 408 on utility 
income taxes paid, including a $7.4 million write-off in 
2011 plus a $7.7 million revenue accrual recognized in 
2010; and 
a net gain of $6.1 million recognized in 2010 related to 
a refund of property taxes plus accrued interest from a 
favorable tax ruling. 

• 

30

These factors were partially offset by:
• 

increases in residential and commercial customer utility 
margins of $11.3 million, including the effects of 
weather normalization and decoupling mechanisms; 
a slight gain in industrial customer utility margins of 
$0.2 million; and 
an increase in gas cost incentive sharing of $0.5 
million. 

• 

• 

Total utility volumes sold and delivered in 2011 increased 
9% over 2010 primarily due to the impact of colder weather 
on residential and commercial use.  

UTILITY MARGIN TABLE. The following table summarizes the composition of utility gas volumes and revenues for the years 
ended December 31, 2012, 2011, and 2010. Certain prior year amounts in the following table have been reclassified to conform 
with the current year’s presentation. These reclassifications reflect amounts moved into residential, commercial, and industrial 
categories where such amounts were specifically attributable to that customer category. Utility volumes and margin in total were 
not affected by these reclassifications.

In thousands, except degree day and customer data

2012

2011

2010

Favorable/(Unfavorable)

2012 vs.
2011

2011 vs.
2010

Utility volumes - therms:

Residential and commercial sales

Industrial sales and transportation

637,885

473,884

681,621

470,733

596,543

465,426

(43,736)

3,151

Total utility volumes sold and delivered

1,111,769

1,152,354

1,061,969

(40,585)

85,078

5,307

90,385

Utility operating revenues - dollars:

Residential and commercial sales

Industrial sales and transportation
Regulatory adjustment for income taxes paid(1)

Other revenues

Less: Revenue taxes

Total utility operating revenues

Less: Cost of gas

Utility margin

Utility margin:(2)

Residential and commercial sales

Industrial sales and transportation

Miscellaneous revenues

Gain from gas cost incentive sharing

Other margin adjustments
Regulatory adjustment for income taxes paid(1)

Utility margin

Customers - end of period:

Residential customers

Commercial customers

Industrial customers

Total number of customers - end of period

Actual degree days
Percent colder (warmer) than average weather(3)

$ 642,337

$

744,355

$ 696,439

$ (102,018)

$ 47,916

70,020

—

5,935

18,430

699,862

355,335

$ 344,527

$ 306,382

$

$

81,313

(7,162)

3,713

20,741

801,478

458,508

82,300

(11,293)

(987)

7,721

4,173

19,991

770,642

424,494

7,162

2,222

(2,311)

(101,616)

(103,173)

(14,883)

(460)

750

30,836

34,014

342,970

$ 346,148

$

1,557

$

(3,178)

315,688

$ 304,371

$

(9,306)

$ 11,317

28,586

28,635

28,451

4,452

3,811

1,296

—

4,875

2,107

(1,173)

(7,162)

4,658

1,594

(647)

7,721

(49)

(423)

1,704

2,469

7,162

184

217

513

(526)

(14,883)

$ 344,527

$

342,970

$ 346,148

$

1,557

$

(3,178)

621,399

63,619

923

685,941

4,152

615,670

610,598

5,729

5,072

62,948

925

62,489

910

671

(2)

459

15

679,543

673,997

6,398

5,546

4,652

4,171

(3)%

9%

(2)%

(1)  Regulatory adjustment for income taxes paid is described below.
(2)  Amounts reported as margin for each category of customers are operating revenues, which are net of revenue taxes, less cost of gas.
(3)  Average weather represents the 25-year average degree days, as determined in our Oregon general rate case. For 2012, average weather 
represents degree days based on the 25-year average that was set in our 2003 Oregon general rate for the months of January through 
October, plus the new 25-year average set in the 2012 Oregon general rate case for the months of November and December. For the years 
2011 and 2010, average weather represents the 25-year average degree days as set in our 2003 Oregon general rate case.

31

Residential and Commercial Sales
The primary factors that impact results of operations in the 
residential and commercial markets are customer growth, 
seasonal weather patterns, energy prices, competition from 
other energy sources, and economic conditions in our 
service areas. Typically, 80% or more of our annual utility 
operating revenues are derived from gas sales to weather-
sensitive residential and commercial customers. Although 
variations in temperatures between periods will affect 
volumes of gas sold to these customers, the effect on utility 
margin and net income is significantly reduced due to our 
weather normalization mechanism in Oregon. For more 
information on our weather mechanism, see “Regulatory 
Matters—Rate Mechanisms—Weather Normalization Tariff” 
above.

Residential and commercial sales highlights include:

In millions

Volumes - therms:

Residential sales

Commercial sales

Total volumes

Operating revenues:

2012

2011

2010

395.5

242.4

637.9

424.9

256.7

681.6

368.7

227.8

596.5

Residential sales

$

428.5

$

497.2

$

463.7

Commercial sales

213.8

247.2

232.7

Total operating 
revenues

Utility margin:

Residential:

Sales

Weather normalization

Decoupling

Total residential utility 
margin

Commercial:

Sales

Weather normalization

Decoupling

Total commercial utility 
margin

$

642.3

$

744.4

$

696.4

$

211.6

$

222.5

$

197.0

(0.1)

8.6

(10.2)

16.7

10.5

13.1

220.1

229.0

220.6

84.0

0.2

2.1

86.3

87.0

(2.9)

2.6

86.7

77.8

3.5

2.4

83.7

• 

• 

• 

an $8.4 million decrease due to the following 
weather impacts: (1) a $3.0 million of positive 
margin impact realized in the second quarter of 
2011 when colder weather was not fully offset by 
our Oregon weather normalization mechanism, (2) 
a $3.2 million decrease due to warmer weather in 
Washington, which does not have normalization 
mechanisms in place, and (3) a $2.2 million 
decrease due to the effect of warmer weather on 
margin for Oregon customers that opt out of 
weather normalization; 
a $0.5 million decrease in operating revenues 
primarily due to rate case impacts including a 
decrease in our authorized return on equity; and
a $3.4 million margin increase from our gas 
reserves investment.

2011 COMPARED TO 2010. The primary factors contributing 
to changes in the residential and commercial markets were 
as follows:
• 

sales volumes increased 85.1 million therms, or 14%, 
primarily reflecting 12% colder weather;
operating revenues increased $47.9 million, or 7%, 
primarily due to the 14% volume increase; and
utility margin increased $11.3 million, or 4%, primarily 
due to customer growth of 0.8% and colder weather, 
with colder weather benefits partially offset by weather 
normalization adjustments.

• 

• 

Industrial Sales and Transportation
Operating revenues from industrial customers include the 
commodity cost component of gas sold under sales service 
but not under transportation service. Therefore, operating 
revenues from industrial customers can increase or 
decrease when customers switch between sales service 
and transportation service, but generally our margins from 
these customers are unaffected by these changes because 
we do not typically include a profit mark-up for the cost of 
gas. As such, we believe volumes delivered and margins 
are better measures of performance for the industrial sector. 

Industrial sales and transportation highlights include:

In millions

Volumes - therms:

2012

2011

2010

Total utility margin

$

306.4

$

315.7

$

304.3

Industrial - firm sales

34.9

37.6

37.1

2012 COMPARED TO 2011. The primary factors contributing 
to changes in the residential and commercial markets were 
as follows:
• 

sales  volumes  decreased  43.7  million  therms,  or  6%, 
primarily reflecting 11% warmer weather;
operating revenues decreased $102.0 million, or 14%,  
due to a 6% decrease in sales volumes, a 7% decrease 
in average gas prices, which flowed through the 
Company's PGA rates, and $36.2 million of credits on 
customers’ bills in 2012 related to the refund of gas 
cost savings; and
utility margin decreased $9.3 million, or 3%, primarily 
reflecting the following:
• 

a $3.9 million decrease due to timing differences 
from the new billing rate structure resulting from 
the Oregon general rate case;

• 

• 

Industrial - firm 
transportation
Industrial - interruptible
sales

Industrial - interruptible 
transportation

Total volumes

Utility margin:

Industrial - sales and 
transportation

131.2

133.0

130.1

59.6

59.1

58.4

248.2

473.9

241.0

470.7

239.8

465.4

$

28.6

$

28.6

$

28.5

2012 COMPARED TO 2011. The primary factors contributing 
to changes in the industrial sales and transportation markets 
were as follows:
• 

sales volumes increased 3.2 million therms, or 1%, 
primarily reflecting the impact of customers switching to 
natural gas due to the lower prices of natural gas 
compared to oil; and

32

 
• 

utility margin remained flat primarily reflecting the loss 
of a few large industrial customers in 2011 due to the 
economy. Partially offsetting this decrease was an 
increase in customers switching to natural gas 
throughout 2012 due to its price advantage.

2011 COMPARED TO 2010. The primary factors contributing 
to changes in the industrial sales and transportation markets 
were as follows:
• 

sales volumes increased 5.3 million therms, or 1%, 
primarily reflecting increased energy demand, with the 
majority of the increased volumes attributable to the 
manufacturing sector; and
utility margin increased $0.2 million reflecting an 
increase in industrial use of natural gas as a result of 
higher costs for oil and propane fuels, which caused 
some customers to switch to natural gas. Partially 
offsetting this trend was the loss of a few large 
industrial customers due to the economy.

• 

Regulatory Adjustment for Income Taxes Paid 
SB 408 was in effect from 2007 through 2010 and was a 
regulatory mechanism for truing up income taxes paid. In 
May 2011, SB 967 effectively repealed the SB 408 
regulatory adjustment for income taxes paid for the 2010 tax 
year and all years thereafter. For the 2010 tax year, we had 
originally estimated and accrued $7.1 million. Due to the 
repeal, the Company recorded a $7.4 million write-off 
including interest. Results related to SB 408 for 2011 were a 
pre-tax loss of $7.4 million, compared to a pre-tax gain of 
$7.7 million in 2010. For additional information, see 
“Application of Critical Accounting Policies and Estimates—
Revenue Recognition” below.

Other Revenues
Other revenues include miscellaneous fee income as well 
as regulatory revenue adjustments, which reflect current 
period deferrals to and prior year amortizations from 
regulatory asset and liability accounts, except for gas cost 
deferrals which flow through cost of gas. Decoupling 
amortizations and other regulatory amortizations from prior 
year deferrals are included in current or future revenues 
from residential, commercial and industrial firm customers.

Other revenue highlights include:

Cost of Gas
Cost of gas as reported by the utility includes gas 
purchases, gas drawn from storage inventory, gains and 
losses from commodity hedges, pipeline demand costs, 
seasonal demand cost balancing adjustments, regulatory 
gas cost deferrals, production from gas reserves and 
company gas use. The OPUC and WUTC generally require 
natural gas commodity costs to be billed to customers at the 
actual cost incurred, or expected to be incurred, by the 
utility. Customer rates are set each year so that if cost 
estimates were met we would not earn a profit or incur a 
loss on gas commodity purchases; however, in Oregon we 
have an incentive sharing mechanism whereby we either 
increase or decrease margin results based on a percentage 
of actual gas costs as compared to embedded gas costs in 
the PGA. Under this provision, our net income can be 
affected by differences between actual and expected gas 
costs, which occur primarily because of market fluctuations 
and volatility affecting unhedged gas purchases in the PGA. 
In addition, we entered into a regulatory agreement where 
we earn a rate base return on our investment in gas 
reserves, which is reflected in utility margin. See 
“Regulatory Matters—Rate Mechanisms—Purchased Gas 
Adjustment and Gas Reserves” above. 

We use natural gas commodity-based hedge contracts 
(derivative instruments), primarily fixed-price commodity 
swaps, consistent with our financial derivatives policies to 
help manage our exposure to rising gas prices. Gains and 
losses from these financial hedge contracts are generally 
included in our PGA prices and normally do not impact net 
income because the hedged prices are reflected in our 
annual rate changes, subject to a regulatory prudence 
review. However, hedge contracts entered into after the 
annual PGA rates are set in Oregon can impact net income 
because we would be required to share in any gains or 
losses as compared to the corresponding commodity prices 
built into rates in the PGA. In Washington, 100% of the 
actual gas costs, including hedge gains and losses 
allocated to Washington gas sales, are passed through in 
customer rates. See “Application of Critical Accounting 
Policies and Estimates—Accounting for Derivative 
Instruments and Hedging Activities” below, “Regulatory 
Matters—Rate Mechanisms—Purchased Gas Adjustment” 
above, and Note 13. 

In millions

2012

2011

2010

Cost of gas highlights include:

Other operating revenues

$

5.9

$

3.7

$

4.2

2012 COMPARED TO 2011. The primary factors contributing 
to changes in other revenues were as follows:
• 

other revenues increased $2.2 million primarily due to a 
net increase in revenues from various regulatory 
adjustments of approximately $2.7 million, partially 
offset by a decrease of $0.4 million of miscellaneous 
fee income.

2011 COMPARED TO 2010. The primary factor contributing to  
the change in other revenues was as follows:
• 

other revenues decreased $0.5 million primarily due to 
a net decrease in revenues from various regulatory 
adjustments in 2011.

Dollars and therms in 
millions

2012

2011

2010

Cost of gas

$

355.3

$

458.5

$

424.5

Total volumes sold and 
delivered (therms)

Average cost of gas 
(cents per therm)

Total hedge loss

Gain from gas cost 
incentive sharing

1,112

1,152

1,062

$

$

0.54

70.2

3.8

$

0.59

56.5

2.1

0.61

61.0

1.6

2012 COMPARED TO 2011. The primary factors contributing 
to changes in cost of gas were as follows:
• 

cost of gas decreased $103.2 million, or 23%, including 
the $37.7 million of credits applied to customer billings 
in 2012 related to the refund of gas cost savings. 
Excluding the customer credits, total cost of gas 

33

• 

• 

decreased $65.5 million, or 14%, primarily reflecting 
lower usage due to 11% warmer weather and PGA rate 
decreases in 2012 and 2011;
average cost of gas collected through rates decreased  
5 cents per therm, primarily reflecting lower gas prices 
that were passed on to customers through PGA rate 
decreases effective November 1, 2011 and 2012; and
hedge losses realized and included in cost of gas 
increased $13.7 million, or 24%. Since the underlying 
hedge prices were included in our PGA billing rates, 
these losses did not impact margin or net income.

2011 COMPARED TO 2010. The primary factors contributing 
to changes in cost of gas were as follows:
• 

cost of gas increased $34.0 million, or 8%, due to a 9% 
increase in total sales volumes on 12% colder weather, 
partially offset by a 4% decrease in the average cost of 
gas per therm;
average cost of gas collected through rates decreased 
2 cents per therm, primarily reflecting lower gas prices 
that were passed on to customers through PGA rate 
decreases effective November 1, 2010 and 2011; and
hedge losses realized and included in cost of gas 
decreased $4.5 million, or 7%. As stated above, the 
underlying hedge prices were included in our PGA 
billing rates; therefore, these losses did not impact 
margin or net income.

• 

• 

Actual gas costs in 2012, 2011, and 2010 were below those 
embedded in rates. The effect on shareholders from the gas 
cost incentive sharing mechanism was a contribution to 
margin of $3.8 million in 2012, $2.1 million in 2011, and $1.6 
million in 2010. For a discussion of our gas cost incentive 
sharing mechanism, see “Regulatory Matters—Rate 
Mechanisms—Purchased Gas Adjustment” above.

Business Segments - Gas Storage
Our gas storage segment primarily consists of the non-utility 
portion of our Mist underground storage facility in Oregon 
and our 75% ownership interest in the Gill Ranch 
underground storage facility in California. 

At Mist, we provide gas storage services to customers in the 
interstate and intrastate markets primarily using storage 
capacity that has been developed in advance of core utility 
customers’ requirements. We also contract with an 
independent energy marketing company to provide asset 
management services using our utility and non-utility 
storage and transportation capacity, the results of which are 
included in the gas storage business segment. Pre-tax 
income from gas storage at Mist and third-party 
management services using our utility's storage or 
transportation capacity is subject to revenue sharing with 
core utility customers. Under this regulatory incentive 
sharing mechanism in Oregon, we retain 80% of pre-tax 
income from Mist gas storage services and from asset 
management services when the underlying costs of the 
capacity being used are not included in our utility rates, and 
33% of pre-tax income from such storage and asset 
management services when the capacity being used is 
included in utility rates. The remaining 20% and 67%, 
respectively, are credited to a deferred regulatory account 
for credit to our core utility customers. We have a similar 
sharing mechanism in Washington for pre-tax income 
derived from gas storage and asset management services.  

Our 75% undivided ownership interest in the Gill Ranch 
facility is held by our wholly-owned subsidiary Gill Ranch, 
which is also the operator of the facility. Our portion of the 
facility is currently providing 15 Bcf of gas storage capacity. 
Gill Ranch commenced operations at the end of 2010, with 
the first full storage injection season beginning on April 1, 
2011. We also contract with an independent energy 
marketing company to manage the value of our storage 
assets at the Gill Ranch gas storage facility. See Note 4.

Gas storage segment highlights include:

In millions, except EPS 
data

2012

2011

2010

Gas storage net income

$

4.5

$

4.1

$

6.1

EPS - gas storage 
segment

0.17

0.15

0.23

2012 COMPARED TO 2011. The primary factors contributing 
to changes in our gas storage segment were as follows:
net income increased $0.4 million primarily due to 
• 
revenue increases at Gill Ranch from additional 
contracted storage capacity. This increase was partially 
offset by a full year of interest expense from Gill 
Ranch's senior secured debt, which was issued in 
November 2011.

2011 COMPARED TO 2010. The primary factors contributing 
to changes in our gas storage segment were as follows:
• 

net income decreased $2.0 million primarily due to a 
combination of lower storage and asset management 
revenues driven by lower gas prices and less market 
volatility.

Business Segments - Other
Our other business segment consists primarily of NNG 
Financial's investment in the Kelso-Beaver (KB) Pipeline, an 
equity investment in PGH, which in turn has invested in a 
cross-Cascade pipeline project, and other miscellaneous 
non-utility investments and business activities. 
Other business highlights include:

In millions, except EPS data

2012

2011

2010

Assets:

NNG Financial

PGH investment

Net income metrics:

$

1.1

$

1.1

$

13.4

13.5

Other net income (loss)

$

0.2

$

(0.7) $

EPS - other segment

—

(0.02)

1.1

14.8

0.3

0.01

2012 COMPARED TO 2011. The primary factors contributing 
to changes in our other business segment were as follows:
total assets at NNG Financial remained flat, primarily 
• 
reflecting no change in our non-controlling minority 
interest in the KB interstate gas transmission pipeline;
our equity investment in PGH remained relatively flat; 
and
net income increased $0.9 million as our investment in 
PGH had a $1.3 million impairment charge in 2011, 
which did not reoccur in 2012.

• 

• 

2011 COMPARED TO 2010. The primary factors contributing 
to changes in our other business segment were as follows:

34

• 

• 

• 

total assets at NNG Financial remained flat, primarily 
reflecting no change in our non-controlling minority 
interest in the KB interstate gas transmission pipeline;
our equity investment in PGH reflected an 
approximately $1.3 million charge taken in 2011; and
net income decreased $1.0 million primarily due an 
approximately $1.3 million charge on our investment in 
PGH. See Note 12.

Consolidated Operations

Operations and Maintenance
Operations and maintenance highlights include:

In millions

2012

2011

2010

Operations and maintenance

$ 129.5

$ 125.4

$ 121.0

2012 COMPARED TO 2011. Operations and maintenance 
expense increased $4.1 million or 3% in 2012 compared to 
2011. The following summarizes the major factors that 
contributed to this increase:
• 

a $3.7 million increase in utility payroll expense primarily 
related to an increase in field service employees;
a  $1.7  million  increase  in  utility  non-payroll  expense 
including  higher  costs  for  new  employee  training, 
expenses related to the Oregon general rate case, higher 
costs for information technology system maintenance and 
other general customer service cost increases; and
a $0.9 million increase in utility employee benefit expense, 
principally related to health care and pension costs, which 
were driven by an increase in employee count. See below 
for additional discussion on pension costs.

• 

• 

Partially offsetting the above factors were: 
• 

a  $1.1  million  reduction  in  gas  storage  general  and 
administrative  expense  primarily  reflecting  lower  costs 
compared to 2011 when Gill Ranch incurred higher start-
up costs; and
a $0.8 million decrease in utility bad debt expense.

• 

2011 COMPARED TO 2010. Operations and maintenance 
expense increased $4.3 million or 4% in 2011 compared to 
2010. The following summarizes the major factors that 
contributed to this increase:
• 

a  $3.2  million  increase  in  operating  expenses  at  Gill 
Ranch related to the first full year of operations;
a $2.3 million increase in utility payroll expense related 
to additional field support staff and general pay increases;
a $1.2 million increase in utility health care costs and other 
related employee benefit expense;
a $1.5 million increase in other non-payroll expense at 
the utility for costs related to the general rate case of $0.7 
million,  storage  leases  of  $0.3  million,  and  pipeline 
integrity  and  corporate  ethics  initiatives  of  $0.2  million; 
and
a $0.2 million increase in utility bad debt expense (see 
further discussion below).

Partially offsetting the above factors were:
• 

a $1.8 million decrease in performance bonuses at the 
utility  based  on  below-target  results  compared  to  last 
year;
a $1.5 million decrease in pension expense due to the 
regulatory deferral of costs above the amount net in rates 
(see further discussion below); and

• 

• 

• 

• 

• 

• 

a $1.0 million decrease in specific consulting and legal 
fees which were incurred by the utility in 2010 related to 
our successful property tax appeal.

Our bad debt expense as a percent of revenues was 0.15% 
for the year ended December 31, 2012, compared to 0.23% 
in 2011. Our bad debt expense decreased in 2012 partially 
due to the positive impact of customer refunds on 
delinquent balances during the period. Our bad debt 
expense results continue at historically low levels for the 
Company despite challenging economic conditions in recent 
years. We believe credit risks are still somewhat elevated 
due to the continuing weak economy and high 
unemployment rates, but we expect our bad debt expense 
ratio over the long term to remain below 0.5% of revenues.

Our accounting expense for pension costs increased in 
2012 largely due to lower discount rates; however, the 
OPUC approved a deferral of our utility pension costs for 
amounts in excess of what is currently recovered in 
customer rates. The pension cost deferral is recorded to a 
regulatory balancing account, which reduces operations and 
maintenance expense. For the year ended December 31, 
2012 and 2011, we deferred pension expenses totaling $7.9 
million and $6.0 million, respectively. See Note 8. As a 
result, increased pension costs had a minimal effect on 
operations and maintenance expense in 2012 and 2011, 
with the increase principally related to the cost allocation to 
our Washington operations, which are not covered by the 
pension balancing account. For further explanation of the 
pension balancing account, see “Regulatory Matters—Rate 
Mechanisms—Pension Deferral” above.

General Taxes
General taxes are principally comprised of property and 
payroll taxes and regulatory fees. 

General tax highlights include:

In millions

General taxes

2012

2011

2010

$

30.6

$

29.3

$

23.9

2012 COMPARED TO 2011. General taxes increased $1.3 
million or 4% in 2012 compared to 2011 primarily due to a 
$0.7 increase in property taxes at Gill Ranch, which reflect 
increased capital investments added to assessed property 
tax values duri
ng 2012, as well as a $0.4 increase in payroll tax expense 
at the utility.  

2011 COMPARED TO 2010. General taxes increased $5.4 
million or 23% in 2011 compared to 2010. The major factors 
that contributed to the increase are:
• 

a $5.2 million increase due to a refund of property taxes 
in 2010, which did not reoccur in 2011. See  discussion 
below; and
a $1.3 million increase in property taxes at Gill Ranch 
as a result of the first full year of operations.

• 

In 2010, as a result of successful litigation with the Oregon 
Department of Revenue (ODOR) regarding property taxes 
on inventories held for sale, we recognized a net $6.1 
million increase in pre-tax income. This increase consisted 
of a $5.2 million property tax refund, $1.9 million of accrued 

35

interest income, and $1.0 million of increased operations 
and maintenance expense for legal and consulting 
services. We received all of the property tax refunds in 
2010.

Depreciation and Amortization
Depreciation and amortization highlights include:

In millions

2012

2011

2010

Depreciation and amortization

$

73.0

$

70.0

$

65.1

2012 COMPARED TO 2011. Depreciation and amortization 
expense for 2012 increased by $3.0 million compared to 
2011 primarily due to $2.7 million increase in utility 
depreciation expense on investments in utility plant for 
system improvements and training facilities. 

2011 COMPARED TO 2010. Depreciation and amortization 
expense increased $4.9 million in 2011 over 2010 primarily 
due to an increase of $3.7 million in Gill Ranch’s 
depreciation, plus additional depreciation on investments in 
utility plant for customer growth and system improvements. 

Other Income and Expense, Net
Other income and expense, net highlights include:

In millions

2012

2011

2010

Gains from company-
owned life insurance

$

Interest income

Income (loss) from equity 
investments

Net interest on deferred
regulatory accounts

Gain (loss) on sale of
investments

Other non-operating

Total other income and 
expense, net

2.3

0.2

—

4.8

(0.2)

(2.2)

$

$

2.2

0.1

(1.6)

6.0

(0.1)

(2.1)

2.0

2.0

0.6

4.7

0.2

(2.4)

$

4.9

$

4.5

$

7.1

2012 COMPARED TO 2011. The $0.4 million increase in other 
income and expense, net for 2012 compared to 2011 was 
primarily due to a $1.3 million loss from our equity 
investment in PGH in 2011, which did not reoccur in 2012. 
This increase was partially offset by $1.2 million of lower 
interest from net regulatory account balances, which 
reflected lower average regulatory account balances in 
2012 due to environmental insurance recoveries received at 
the end of 2011 as well as accumulated gas cost savings 
from November 2011 through June 2012. The Company’s 
refund of gas cost savings increased the regulatory account 
balances, which resulted in higher interest in the second 
half of 2012 compared to the first half of 2012. See 
discussion of Palomar in “Strategic Opportunities—Pipeline 
Diversification” above and in Note 12.

2011 COMPARED TO 2010. The $2.6 million decrease in other 
income, net for 2011 compared to 2010 was primarily due to 
$1.9 million of interest income received from the property 
tax refund in 2010, which did not occur in 2011, and a $1.4 
million loss from equity investments due to Palomar 
charges, partially offset by a $1.3 million increase in interest 
and carrying costs from regulatory account balances largely 

36

due to smaller balances in gas costs between 2011 and 
2010. 

Interest Expense, Net 
Interest expense, net highlights include:

In millions

2012

2011

2010

Interest expense, net

$

43.2

$

42.1

$

42.6

2012 COMPARED TO 2011. Interest expense, net of amounts 
capitalized, in 2012 increased $1.1 million primarily due to a 
$2.8 million increase in interest expense at Gill Ranch from 
the issuance of $40 million of subsidiary senior secured 
debt in November 2011, partially offset by a $1.5 million 
decrease in interest expense at the utility due to lower 
interest rates on new short-term and long-term debt 
issuances. 

2011 COMPARED TO 2010. Interest expense, net of amounts 
capitalized, in 2011 decreased by $0.5 million compared to 
2010. The decrease was primarily due to $1.9 million of 
savings in interest expense on long-term debt as a result of 
bonds that were redeemed in 2010, partially offset by a $1.1 
million increase for gas storage interest expense related to 
the Gill Ranch base gas agreement, as well as the issuance 
of $50 million of 3.176% Company first mortgage bonds 
(FMBs) in September 2011 and the issuance of $40 million 
of subsidiary senior secured debt with an average interest 
rate of 7.38% for Gill Ranch in November 2011. 

Interest expense also reflects a lower average interest rate 
used in calculating the allowance for funds used during 
construction (AFUDC). AFUDC rates, comprised of short-
term and long-term capital costs as appropriate, were 0.3% 
in 2012, 0.5% in 2011 and 0.6% in 2010.

Income Tax Expense
Income tax expense highlights include:

In millions

2012

2011

2010

Income tax expense

$ 44.1

$ 43.4

$ 49.5

Effective tax rate

42.4%

40.4%

40.5%

2012 COMPARED TO 2011. The increase in income tax 
expense of $0.7 million or 2% and the increase in the 
effective tax rate was primarily due to a one-time $2.7 
million tax charge related to the Oregon general rate case. 
This increase in taxes was partially offset by lower pre-tax 
consolidated earnings. 

2011 COMPARED TO 2010. The decrease in income tax 
expense of $6.1 million, or 12% was primarily due to lower 
pre-tax consolidated earnings. 

EFFECTIVE TAX RATES. For the 2012 tax year, the higher 
effective tax rate was primarily due to the $2.7 million tax 
charge related to the Oregon general rate case. For the 
2011 tax year, the lower effective tax rate was primarily due 
to a decrease in state tax expense from Measure 67. For 
the 2010 tax year, the higher effective tax rate was primarily 
the result of increased amortization of our regulatory tax 
account on pre-1981 utility plant assets (see “Regulatory 
Matters—Application of Critical Accounting Policies and 
Estimates,” below) and a lower non-taxable gain on 

company-owned life insurance. For more information on our 
income taxes, including a reconciliation between the 
statutory federal and state income tax rates and the 
effective rate, see Note 2 and Note 9.

For the 2012 tax year, we have stated our deferred tax 
expense using an estimated blended state tax rate that 
takes into account different tax rates, tax brackets, and state 
apportionment that impact our estimated future state income 
tax liabilities.

FINANCIAL CONDITION

Capital Structure
One of our long-term goals is to maintain a strong 
consolidated capital structure, generally consisting of 45% 
to 50% common stock equity and 50% to 55% long-term 
and short-term debt. When additional capital is required, 
debt or equity securities are issued depending upon both 
the target capital structure and market conditions. These 
sources of capital are also used to fund long-term debt 
retirements and short-term commercial paper maturities. 
See “Liquidity and Capital Resources” below and Note 7. 

Achieving the target capital structure and maintaining 
sufficient liquidity to meet operating requirements are 
necessary to maintain attractive credit ratings and have 
access to capital markets at reasonable costs. Our 
consolidated capital structure was as follows:

Common stock equity

Long-term debt

Short-term debt, including current
maturities of long-term debt

Total

December 31,

2012

2011

45.4%

46.5%

42.8

11.8

41.7

11.8

100.0%

100.0%

Liquidity and Capital Resources 
At December 31, 2012, we had $8.9 million of cash and 
cash equivalents compared to $5.8 million at December 31, 
2011. We also had $4.0 million in restricted cash at Gill 
Ranch as of both December 31, 2012 and 2011, which is 
being held as collateral for its long-term debt outstanding. In 
order to maintain sufficient liquidity during periods when 
capital markets are volatile, we may elect to maintain higher 
cash balances and add short-term borrowing capacity. In 
addition, we may also pre-fund utility capital expenditures 
when long-term fixed rate environments are attractive. As a 
regulated entity, our issuance of equity securities and most 
forms of debt securities are subject to approval by the 
OPUC and WUTC, and our use of proceeds from utility 
specific issuances are restricted to certain utility purposes. 
Our use of retained earnings is not subject to those same 
restrictions.

For the utility segment, our short-term liquidity is supported 
by cash balances, internal cash flow from operations, 
proceeds from the sale of commercial paper notes, 
borrowings from multi-year credit facilities, cash available 
from surrender value in company-owned life insurance 
policies, and proceeds from the sale of long-term debt. We 
use utility long-term debt proceeds to finance utility capital 

37

expenditures, refinance maturing debt of the utility and 
provide for general corporate purposes of the utility.  

Current market conditions are better than the past few years 
as reflected by tighter credit spreads and increased access 
to financing for investment grade issuers. Based on our 
current debt ratings (see “Credit Ratings” below), we have 
been able to issue commercial paper and long-term debt at 
attractive rates and have not needed to borrow from our 
back-up credit facility. In the event that we are not able to 
issue new debt due to market conditions, we expect that our 
near term liquidity needs can be met by using cash 
balances or, for the utility segment, drawing upon our 
committed credit facility. We also have a universal shelf 
registration filed with the SEC for the issuance of secured 
and unsecured debt or equity securities, subject to market 
conditions and certain regulatory approvals. As of 
December 31, 2012, we had OPUC approval to issue up to 
$75 million of additional long-term debt under the existing 
shelf registration for approved purposes. 

In the event that our senior unsecured long-term debt credit 
ratings are downgraded, or our outstanding derivative 
position exceeds a certain credit threshold, our 
counterparties under derivative contracts could require us to 
post cash, a letter of credit or other form of collateral, which 
could expose us to additional cash requirements and may 
trigger increases in short-term borrowings. If the credit risk-
related contingent features underlying these contracts were 
triggered on December 31, 2012, we could have been 
required to post $1.6 million of collateral to our 
counterparties, assuming our long-term debt ratings were at 
non-investment grade levels, which would be a very 
significant change from current rating levels for NW Natural. 
See Note 13 and “Credit Ratings” below.

In July 2010, the U.S. Congress passed and President 
Obama signed into law the “Dodd-Frank Wall Street Reform 
and Consumer Protection Act” (Dodd-Frank Act or DFA). 
The legislation established a new statutory framework for 
the comprehensive regulation of financial institutions that 
participate in the swaps market and, among other things, 
requires additional government regulation of derivative and 
over-the-counter transactions and expanded collateral 
requirements. The Company is not currently subject to 
regulation as a Swap Dealer under the DFA nor do we 
expect that it will be in the future based on current or as yet 
unfinalized rules. Further, we believe we are eligible for and 
have taken appropriate steps to be exempt from certain 
reporting obligations under the DFA. We will continue to 
monitor interpretations and Commodity Futures Trading 
Commission guidance to determine the impact, if any, on 
our hedging policies, procedures, results of operations, 
financial position and liquidity.

Other recent developments that may have a significant 
impact on our liquidity and capital resources include pension 
contribution requirements, tax benefits and liabilities, 
environmental expenditures and insurance recoveries, and 
customer refunds of gas cost savings. 

With respect to pensions, we expect to make significant 
contributions to our company-sponsored defined benefit 
plan, which is closed to new employees, over the next  
several years until we are fully funded under the Pension 

 
 
  
 
Under the debt agreements, Gill Ranch is subject to certain 
covenants and restrictions, including but not limited to a 
financial covenant that requires Gill Ranch to maintain 
minimum adjusted earnings before interest, taxes, 
depreciation, and amortization (EBITDA) at various levels 
over the term of the debt. The minimum adjusted EBITDA 
increases incrementally over the first few years, reaching its 
highest level in the 12-month period beginning April 1, 2015. 
Under the agreements, Gill Ranch is also subject to a debt 
service reserve requirement of 10% of the outstanding 
principal amount, initially $4 million, certain prepayment 
penalties, restrictions on dividends out of Gill Ranch unless 
certain earnings ratios are met, and restrictions on the 
incurrence of additional debt. As of and for the year ended 
December 31, 2012, we were in compliance with all 
covenants and restrictions under the debt agreements.

Based on several factors, including our current credit 
ratings, our commercial paper program, current cash 
reserves, committed credit facilities, and our expected ability 
to issue long-term debt in the capital markets, we believe 
our liquidity is sufficient to meet anticipated near-term cash 
requirements, including all contractual obligations, investing 
and financing activities discussed below.

Dividend Policy 
We have paid quarterly dividends on our common stock 
each year since stock was first issued to the public in 1951. 
Annual common stock dividend payments per share, 
adjusted for stock splits, have increased each year since 
1956. The amount and timing of dividends payable on our 
common stock is at the sole discretion of our Board of 
Directors. Subject to Board approval, we expect to continue 
paying quarterly cash dividends on common stock. 
However, the declarations and amount of future dividends 
will depend upon our earnings, cash flows, financial 
condition and other factors including Board approval.

Off-Balance Sheet Arrangements  
Except for certain lease and purchase commitments, we 
have no material off-balance sheet financing arrangements. 
See “Contractual Obligations” below.

Protection Act rules, including the new rules issued under 
the MAP-21 Act. See "Application of Critical Accounting 
Policies—Accounting for Pensions and Postretirement 
Benefits" below. 

With respect to federal income tax liabilities, extensions 
have been granted allowing us to take 100% bonus 
depreciation on qualified expenditures during 2011 and 50% 
bonus depreciation on a majority of our capital expenditures 
in 2012 and 2013, which significantly reduces our tax 
liability for those tax years and is expected to provide cash 
flow benefits in subsequent years.

With respect to environmental expenditures, we expect to 
continue using cash resources to fund our environmental 
liabilities, but we also anticipate recovering amounts through 
insurance and utility rates over the next several years, 
although the amount and timing of these expenditures and 
recoveries is uncertain. See Note 15, "Results of Operations
—Regulatory Matters—Environmental Costs" above.

With respect to customer refunds or credits, gas prices were 
significantly lower than the gas prices embedded in 
customer rates between November 1, 2011 and March 31, 
2012. As a result, our PGA incentive sharing mechanism 
deferred 90% of these gas cost savings attributed to 
Oregon, and 100% of the savings attributed to Washington, 
into a regulatory account for refund back to customers. See 
"Results of Operations—Regulatory Matters—Regulatory 
Mechanisms—Purchased Gas Adjustment” above. 
Ordinarily, these refunds would be credited to customer 
rates in the next year’s PGA filing, but in the second quarter 
of 2012 the Company received regulatory approval to 
immediately credit $35 million to Oregon customers and $4 
million to Washington customers through billing credits. In 
addition, the Company also received approval to provide its 
Oregon utility customers with a $9 million interstate storage 
credit from our regulatory incentive sharing mechanism 
related to gas storage and asset management services. 
These credits were applied to customer bills in June and 
July of 2012.

Our gas storage segment’s short-term liquidity is supported 
by cash balances, internal cash flow from operations, 
external financing, and, to a certain extent, funding from its 
parent company. Gill Ranch has limited operational history, 
having begun operations in October 2010. Although we 
anticipate operating cash flows to be sufficient for liquidity 
purposes, the amount and timing of these cash flows are 
uncertain. In November 2011, Gill Ranch issued $40 million 
of senior secured debt, with a fixed interest rate on $20 
million and a variable interest rate on the remaining $20 
million. The average combined interest rate on the debt was 
7.38% per annum through December 31, 2012. This debt is 
secured by all of the membership interests in Gill Ranch and 
is nonrecourse to NW Natural and other entities of the 
consolidated group. The maturity date of the debt is 
November 30, 2016.

38

Contractual Obligations
The following table shows our contractual obligations at December 31, 2012 by maturity and type of obligation:

In millions

Commercial paper

Long-term debt maturities

Interest on long-term debt
Postretirement benefit payments(1)

Capital leases

Operating leases
Gas purchases(2)

Gas pipeline capacity commitments
Gas reserves(3)
Other purchase commitments(4)
Other long-term liabilities(5)

Payments Due in Years Ending December 31,

2013

2014

2015

2016

2017

Thereafter

Total

$

190.3

$

— $

— $

— $

— $

— $

—

40.1

21.7

0.6

5.4

104.4

94.3

56.6

—

15.3

60.0

40.0

22.3

0.3

5.7

12.2

86.1

49.2

0.5

—

40.0

38.5

22.9

0.2

5.5

—

72.7

41.8

0.1

—

65.0

35.5

23.7

—

5.5

—

61.4

—

—

—

40.0

30.3

24.5

—

5.5

—

48.5

—

—

—

486.7

249.7

140.1

—

33.1

—

240.9

—

13.6

—

190.3

691.7

434.1

255.2

1.1

60.7

116.6

603.9

147.6

14.2

15.3

Total

$

528.7

$

276.3

$

221.7

$

191.1

$

148.8

$

1,164.1

$

2,530.7

(1) 

The majority of these estimated postretirement benefit payments are related to our qualified defined benefit pension plans, which are funded 
by plan assets and future cash contributions. See Note 8.

(2)  Gas purchases include contracts which use price formulas tied to monthly index prices, plus hedged derivative liabilities. Commitment amounts 
are based on futures prices as of December 31, 2012. For a summary of derivatives, see Note 13. For a summary of gas purchase and gas 
pipeline capacity commitments, see Note 14.

(3)  Gas reserves payments reflect contractual obligations to invest in additional gas reserves. The contracts for such reserves include termination 
provisions, under which investments in additional reserves would not be required, if conditions for such provisions were met. We have assumed 
no cancellation for disclosure of gas reserve commitments.

(4)  Other purchase commitments primarily consist of base gas requirements and remaining balances under existing purchase orders. 
(5)  Other  long-term  liabilities  includes  accrued  vacation  liabilities  for  management  employees  and  deferred  compensation  plan  liabilities  for 
executives and directors. The timing of these payments are uncertain; however, these payments are unlikely to all occur in the next twelve 
months.

In addition to known contractual obligations listed in the 
above table, we have also recognized liabilities for future 
environmental remediation or action. The exact timing of 
payments beyond 12 months with respect to those liabilities 
cannot be reasonably estimated due to numerous 
uncertainties surrounding the course of environmental 
remediation and the preliminary nature of site investigations. 
See Note 15 for a further discussion of environmental 
remediation cost liabilities.

At December 31, 2012, 623 of our utility employees were 
members of the Office and Professional Employees 
International Union (OPEIU) Local No. 11. In July 2009, 
these union employees and the Company agreed to a new 
five-year labor agreement called the Joint Accord. The Joint 
Accord provides for a 1% automatic wage increase each 
year, plus the potential for up to an additional 2% based on 
wage inflation and other factors. It also provides competitive 
health benefits while limiting the cost increases for these 
benefits to the same level as the annual wage increases. 
The current Joint Accord extends to May 31, 2014, and 
thereafter from year to year unless either party serves 
notice of its intent to negotiate modifications to the collective 
bargaining agreement.

Short-Term Debt
Our primary source of utility short-term liquidity is from 
internal cash flows and the sale of commercial paper. In 
addition to issuing commercial paper to meet working 
capital requirements, including seasonal requirements to 
finance gas purchases and accounts receivable, short-term 
debt may also be used to temporarily fund utility capital 
requirements. Commercial paper is periodically refinanced 

through the sale of long-term debt or equity securities. Our 
outstanding commercial paper, which is sold through two 
commercial banks under an issuing and paying agency 
agreement, is supported by one or more unsecured 
revolving credit facilities. See “Credit Agreements” below. At 
December 31, 2012 and 2011, our utility had commercial 
paper outstanding of $190.3 million and $141.6 million, 
respectively. The effective interest rate on the utility’s 
commercial paper outstanding at December 31, 2012 and 
2011 was 0.3%.

Credit Agreements
In December 2012, we entered into a new multi-year credit 
agreement for unsecured revolving loans totaling $300 
million with a maturity date of December 20, 2017 and an 
available extension of commitments for two additional one-
year periods, subject to lender approval. Our prior $250 
million agreement, dated May 31, 2007, was terminated 
upon the closing of this new agreement. All lenders under 
the new agreement are major financial institutions with 
committed balances and investment grade credit ratings as 
of December 31, 2012 as follows:

In millions

Lender rating, by category

Loan Commitment

$

$

123

177

—

300

AA/Aa

A/A

BBB/Baa

Total

39

 
 
 
 
Based on credit market conditions, it is possible that one or 
more lending commitments could be unavailable to us if the 
lender defaulted due to lack of funds or insolvency. 
However, based on our current assessment of our lenders’ 
creditworthiness, including a review of capital ratios, credit 
default swap spreads and credit ratings, we believe the risk 
of lender default is minimal.

Our credit agreement allows us to request increases in the 
total commitment amount, up to a maximum of $450 million. 
The agreement also permits the issuance of letters of credit 
in an aggregate amount of up to $200 million. Any principal 
and unpaid interest amounts owed on borrowings under the 
credit agreements is due and payable on or before the 
maturity date. There were no outstanding balances under 
this or our prior credit agreement at December 31, 2012 or 
2011. Both the current and former credit agreement requires 
us to maintain a consolidated indebtedness to total 
capitalization ratio of 70% or less. Failure to comply with this 
covenant would entitle the lenders to terminate their lending 
commitments and accelerate the maturity of all amounts 
outstanding. We were in compliance with this covenant at 
December 31, 2012 and 2011, with consolidated 
indebtedness to total capitalization ratios of 54.6% and 
53.5%, respectively.

The agreement also requires us to maintain credit ratings 
with Standard & Poor's (S&P) and Moody's Investors 
Service, Inc. (Moody’s) and notify the lenders of any change 
in our senior unsecured debt ratings or senior secured debt 
ratings, as applicable, by such rating agencies. A change in 
our debt ratings by S&P or Moody’s is not an event of 
default, nor is the maintenance of a specific minimum level 
of debt rating a condition of drawing upon the credit 
agreement. In addition, interest rates on any loans 
outstanding under the credit agreements are tied to debt 
ratings and therefore a change in the debt rating would 
increase or decrease the cost of any loans under the credit 
agreements when ratings are changed. See “Credit Ratings” 
below.

Credit Ratings
Our debt credit ratings are a factor in our liquidity, affecting 
our access to the capital markets including the commercial 
paper market. Our debt credit ratings also have an impact 
on the cost of funds and the need to post collateral under 
derivative contracts. In December 2012, Moody's 
downgraded our short-term debt rating from P-1 to P-2. In 
February 2013, S&P upgraded our secured long-term first 
mortgage bond rating from A+ to AA-. These changes have 
not materially impacted our liquidity, access to the short-
term commercial paper markets, or our borrowing costs. 
There were no other changes in our credit ratings during 
2012.

The following table summarizes our current debt ratings 
from S&P and Moody’s:

Commercial paper (short-term debt)

Senior secured (long-term debt)

Senior unsecured (long-term debt)

Corporate credit rating

Ratings outlook

S&P

Moody's

A-1

AA-

n/a

A+

P-2

A1

A3

n/a

Stable

Negative

The above credit ratings are dependent upon a number of 
factors, both qualitative and quantitative, and are subject to 
change at any time. The disclosure of these credit ratings is 
not a recommendation to buy, sell or hold NW Natural 
securities. Each rating should be evaluated independently of 
any other rating.

Retirements of Long-Term Debt
The following FMBs were retired:

In millions

Company First Mortgage Bonds

Years Ended December 31,

2012

2011

2010

4.11% Series B due 2010

$

— $

— $

7.45% Series B due 2010

6.665% Series B due 2011

7.13% Series B due 2012

—

—

40

40

$

—

10

—

10

$

$

10

25

—

—

35

Cash Flows

Operating Activities
Year-over-year changes in our operating cash flows are 
primarily affected by net income, changes in working capital 
requirements, and other cash and non-cash adjustments to 
operating results. 

Operating activity highlights include:

In millions

2012

2011

2010

Cash provided by operating 
activities

$ 168.8

$ 233.5

$ 126.5

2012 COMPARED TO 2011. The significant factors 
contributing to the $64.6 million decrease in operating cash 
flow for 2012 compared to 2011 are as follows: 
•  a  decrease  of  $38.1  million  in  deferred  environmental 
expenditures, net of recoveries, primarily due to insurance 
recoveries for environmental claims received in 2011;

•  a decrease of $30.9 million in taxes accrued, primarily due 
to federal tax refunds totaling $36.6 million received in 2011; 
and

•  a decrease of $26.2 million from changes in the deferred 
gas  cost  savings  balance,  which  was  reduced  when 
approximately  $39  million  was  refunded  to  customers  in 
June and July 2012.

Partially offsetting these decreases was:
•  an increase of $28.4 million from reductions in receivable 
balances primarily due to higher receivable balances from 

40

 
 
 
 
colder  weather  at  the  end  of  2011,  which  were  collected 
early in 2012.

Also affecting cash flow from operating activities is the 
amount of cash contributions made to the utility’s qualified 
defined benefit pension plans. During the year ended 
December 31, 2012, we contributed $23.5 million to these 
plans, which was significantly higher than the $5.4 million in 
non-cash expense recognized on the income statement. In 
2011, we contributed $22.0 million and had $7.2 million in 
non-cash expense. We expect pension contributions to 
exceed non-cash expense for the next few years, but 
contribution amounts will be less than previously anticipated 
due to funding relief approved under the new MAP-21 Act in 
July 2012. The amounts and timing of future contributions 
will depend on market interest rates and investment returns 
on the plans’ assets. See Note 8.

Also significantly affecting cash flows over the past few 
years has been income tax relief, including the Tax Relief, 
Unemployment Insurance Reauthorization, and Job 
Creation Act of 2010 (the Tax Relief Act). The Tax Relief Act 
allowed 100% bonus depreciation on qualified property 
placed in service between September 9, 2010 through 
December 31, 2011. It also extended the 50% bonus 
depreciation deduction to qualifying property placed in 
service during 2012. These and other tax benefits resulted 
in a net operating tax loss for 2010, which was carried back 
to the tax year 2009 and resulted in a federal income tax 
refund of $22.3 million received in 2011 and an additional 
$2.1 million received in 2012. We generated taxable income 
in 2011 that was fully offset by net operating loss (NOL) 
carried forward from 2010. We continued to generate NOL 
carryforwards during 2012. As of December 31, 2012, we 
had an estimated federal income tax receivable balance of 
$2.3 million and an estimated NOL carryforward balance of 
$83.4 million to 2013. In 2011, Oregon conformed with 
federal bonus depreciation, contributing to a state NOL 
carryforward of $76.6 million to 2013. We anticipate being 
able to use the full amount of the both NOL carryforward 
balances in future years prior to expiration. The NOLs would 
otherwise expire in 20 years for federal and 15 years for 
Oregon.

2011 COMPARED TO 2010. The significant factors 
contributing to the $107.0 million increase in operating cash 
flow for 2011 compared to 2010 are as follows: 
• 

an increase of $85.7 million from accrued taxes, primarily 
related  to  bonus  depreciation  which  resulted  in  federal 
tax refunds of $36.6 in 2011 and a NOL carryforward;
an increase of $34.7 million from changes in deferred gas 
costs, which reflects a higher level of gas cost savings 
which will be refunded to utility customers in subsequent 
years’ PGA;
an increase of $33.4 million from insurance recoveries for 
environmental  claims,  net  of  deferred  environmental 
expenditures in 2011; and
an  increase  of  $12.0  million  from  changes  in  accounts 
payable  due  to  decreased  construction  activity  at  Gill 
Ranch.

• 

• 

• 

Partially offsetting these increases was:
• 

a decrease of $29.5 million from changes in deferred tax 
liabilities primarily reflecting higher tax benefits in 2010 
compared to 2011, largely driven by utility and Gill Ranch 

41

• 

• 

bonus  depreciation  for  investments  placed  in  service 
during 2010;
a decrease of $22.1 million from changes in receivables 
primarily due to higher balances at the end of 2009, which 
benefited cash flows in 2010; and
a  decrease  of  $12.0  million  from  higher  pension 
contributions due to a decline in interest rates and asset 
values, which increased pension funding requirements.

We have lease and purchase commitments relating to our 
operating activities that are financed with cash flows from 
operations. For information on cash flow requirements 
related to leases and other purchase commitments, see 
“Financial Condition—Contractual Obligations” above and 
Note 14.

Investing Activities
Investing activity highlights include:

In millions

2012

2011

2010

Total cash used in investing 
activities

Capital expenditures

Utility gas reserves

$ 184.7

$ 153.1

$ 212.9

132.0

54.1

100.5

50.6

248.5

—

2012 COMPARED TO 2011. The $31.6 million increase in cash 
used in investing activities was due to higher capital 
expenditures reflecting expenditures relating to a new utility 
training and back-up emergency operations facility, and 
several upgrades to existing building facilities. In addition, 
we also invested additional monies in utility gas reserves.

2011 COMPARED TO 2010. The $59.8 million decrease in 
cash used in investing activities was due to lower capital 
expenditures primarily due to decrease in non-utility 
construction activity in 2011 as our Gill Ranch facility was 
primarily constructed in 2010. Offsetting this decrease was 
our investment in utility gas reserves.

Over the five-year period 2013 through 2017, total utility 
capital expenditures are estimated to be between $600 and 
$700 million and utility expenditures under the existing gas 
reserves agreement are estimated to be $150 million. The 
estimated level of utility capital expenditures over the next 
five years reflects assumptions for continued customer 
growth, technology, distribution system improvements and 
gas storage facilities. Most of the required funds are 
expected to be internally generated over the five-year 
period, and any remaining funding will be obtained through 
the issuance of long-term debt or equity securities, with 
short-term debt providing liquidity and bridge financing.

In 2013, we expect to spend between $10 and $15 million 
on non-utility capital projects. Non-utility spend for gas 
storage and other investments after 2013 will depend 
largely on future decisions about potential expansion 
opportunities in gas storage and pipeline projects. Gas 
storage segment capital expenditures in 2013 are expected 
to be paid primarily from working capital, and potentially with 
additional funds from NW Natural.

benefit pension plans were underfunded by $154.4 million at 
December 31, 2012. We plan to make contributions during 
2013 of up to $15 million. 

We also contribute to a multiemployer pension plan for our 
union employees (the Union Plan, or otherwise known as 
Western States Plan) pursuant to our collective bargaining 
agreement. We made contributions totaling $0.4 million to 
the Union Plan in both 2012 and 2011. See Note 8 for 
further pension disclosures.

Ratios of Earnings to Fixed Charges
For the years ended December 31, 2012, 2011, and 2010, 
our ratios of earnings to fixed charges, computed using the 
Securities and Exchange Commission (SEC) method, 
were 3.30, 3.41, and 3.73, respectively. For this purpose, 
earnings consist of net income before taxes plus fixed 
charges, and fixed charges consist of interest on all 
indebtedness, the amortization of debt expense and 
discount or premium and the estimated interest portion of 
rentals charged to income. See Exhibit 12.

Contingent Liabilities
Loss contingencies are recorded as liabilities when it is 
probable that a liability has been incurred and the amount of 
the loss is reasonably estimable in accordance with 
accounting standards for contingencies. See Part II, Item 7, 
“Application of Critical Accounting Policies and Estimates” 
below. At December 31, 2012, we had a regulatory asset of 
$126.5 million for deferred environmental costs, which 
includes $69.7 million for additional costs expected to be 
paid in the future and $23.4 million of accrued interest. If it is 
determined that both the insurance recovery and future 
customer rate recovery of such costs are not probable, then 
the costs will be charged to expense in the period such 
determination is made. For further discussion of contingent 
liabilities, see Note 15 and "Results of Operations—
Regulatory Matters—Rate Mechanisms—Environmental 
Costs" above.

New Accounting Pronouncements 
For a description of recent accounting pronouncements that 
may have an impact on our financial condition, results of 
operations or cash flows, see Note 2.

Financing Activities
Financing activity highlights include:

In millions

2012

2011

2010

Total cash provided by (used
in) financing activities

$

18.9

$

(78.0) $

81.4

Change in short-term debt

Change in long-term debt

48.7

10.0

Cash dividend payments

(48.0)

(46.7)

(115.8)

155.4

80.0

(35.0)

(44.7)

2012 COMPARED TO 2011. The $97.0 million increase to 
cash provided by financing activity was primarily due to 
changes in our short-term debt balances, which increased 
$48.7 million in 2012 compared to a decrease of $115.8 
million in 2011. In 2012, we retired $40 million of long-term 
debt and issued $50 million of long-term debt. We continue 
to use long-term debt proceeds to finance capital 
expenditures, refinance maturing short-term or long-term 
debt maturities, and to fund other general corporate 
purposes.

2011 COMPARED TO 2010. The $159.4 million increase to 
cash used in financing activities is primarily due to our short-
term debt balances, which decreased $115.8 million. We 
retired $10 million of long-term debt and issued $50 million 
of utility long-term debt and $40 million of subsidiary long-
term debt by Gill Ranch. 

We have a stock repurchase program approved through 
May 2013 which provides authorization to repurchase up to 
2.8 million shares of NW Natural common stock or up to 
$100 million. The purchases may be made in the open 
market or through privately negotiated transactions. No 
repurchases were made in 2012, 2011 or 2010 under the 
program.  Since the program's inception, we have 
repurchased an aggregate 2.1 million shares of common 
stock at a total cost of $83.3 million, at the average price of 
$39.19 per share. See Part II, Item 5, “Market for the 
Registrant's Common Equity, Related Stockholder Matters 
and Issuer Purchases of Equity Securities” above.

PENSION COST AND FUNDING STATUS OF QUALIFIED 
RETIREMENT PLANS. Pension costs are determined in 
accordance with accounting standards for compensation 
and retirement benefits. See “Application of Critical 
Accounting Policies and Estimates – Accounting for 
Pensions and Postretirement Benefits” below. Pension 
expense for our qualified defined benefit plan, which are 
allocated between operation and maintenance expenses, 
capital expenditures and the deferred regulatory balancing 
account, totaled $19.1 million in 2012, an increase of $2.8 
million from 2011. 

The fair market value of pension assets in this plan 
increased to $249.6 million at December 31, 2012 from 
$216.0 million at December 31, 2011. The increase was due 
to a return on plan assets of $26.7 million plus $23.5 million 
in employer contributions, partially offset by benefit 
payments of $16.5 million.

We make contributions to company-sponsored qualified 
defined benefit pension plans based on actuarial 
assumptions and estimates, tax regulations and funding 
requirements under federal law. Our qualified defined 

42

  
  
  
 
APPLICATION OF CRITICAL ACCOUNTING POLICIES 
AND ESTIMATES

In preparing our financial statements using GAAP, 
management exercises judgment in the selection and 
application of accounting principles, including making 
estimates and assumptions that affect reported amounts of 
assets, liabilities, revenues, expenses and related 
disclosures in the financial statements. Management 
considers our critical accounting policies to be those which 
are most important to the representation of our financial 
condition and results of operations and which require 
management’s most difficult and subjective or complex 
judgments, including accounting estimates that could result 
in materially different amounts if we reported under different 
conditions or used different assumptions. Our most critical 
estimates and judgments include accounting for:
•  regulatory cost recovery and amortizations;
•  revenue recognition;
•  derivative instruments and hedging activities;
•  pensions and postretirement benefits;
•  income taxes; and
•  environmental contingencies.

Management has discussed its current estimates and 
judgments used in the application of critical accounting 
policies with the Audit Committee of the Board. Within the 
context of our critical accounting policies and estimates, 
management is not aware of any reasonably likely events or 
circumstances that would result in materially different 
amounts being reported. For a description of recent 
accounting pronouncements that could have an impact on 
our financial condition, results of operations or cash flows, 
see Note 2.

Regulatory Accounting
Our utility is regulated by the OPUC and WUTC, which 
establish the rates and rules governing utility services 
provided to customers, and, to a certain extent, set forth 
special accounting treatment for certain regulatory 
transactions. In general, we use the same accounting 
principles as non-regulated companies reporting under 
GAAP. However, authoritative guidance for regulated 
operations (regulatory accounting) require different 
accounting treatment for regulated companies to show the 
effects of such regulation. For example, we account for the 
cost of gas using a PGA deferral and cost recovery 
mechanism, which is submitted for approval annually to the 
OPUC and WUTC. See "Results of Operations—Regulatory 
Matters—Rate Mechanisms—Purchased Gas Adjustment” 
above. There are other expenses and revenues that the 
OPUC or WUTC may require us to defer for recovery or 
refund in future periods. Regulatory accounting requires us 
to account for these types of deferred expenses (or deferred 
revenues) as regulatory assets (or regulatory liabilities) on 
the balance sheet. When we are allowed to recover these 
expenses from, or are required to refund them to, 
customers, we recognize the expense or revenue on the 
income statement at the same time we realize the 
adjustment to amounts included in utility rates charged to 
customers.

The conditions we must satisfy to adopt the accounting policies 
and practices of regulatory accounting include:
an independent regulator sets rates;
• 
the  regulator  sets  the  rates  to  cover  specific  costs  of 
• 
delivering service; and
the service territory lacks competitive pressures to reduce 
rates below the rates set by the regulator. 

• 

Because our utility satisfies all three conditions, we continue 
to apply regulatory accounting to our utility operations. 
Future accounting changes, regulatory changes or changes 
in the competitive environment could require us to 
discontinue the application of regulatory accounting for 
some or all of our regulated businesses. This would require 
the write-off of those regulatory assets and liabilities that 
would no longer be probable of recovery from or refund to 
customers. 

Based on current accounting, regulatory and competitive 
conditions, we believe that it is reasonable to expect 
continued application of regulatory accounting for our utility 
activities, and that all of our regulatory assets and liabilities 
at December 31, 2012 and 2011 are reasonably likely to be 
recovered or refunded through future customer rates. If we 
should determine that all or a portion of these regulatory 
assets or liabilities no longer meet the criteria for continued 
application of regulatory accounting, then we would be 
required to write off the net unrecoverable balances against 
earnings in the period such determination is made. The net 
balance in regulatory asset and liability accounts as of 
December 31, 2012 and 2011 was $131.4 million and 
$156.6 million, respectively. See Note 2 “Industry 
Regulation”.

Revenue Recognition 
Utility and non-utility revenues, which are derived primarily 
from the sale, transportation and storage of natural gas, are 
recognized upon the delivery of gas commodity or services 
rendered to customers. 

ACCRUED UNBILLED REVENUE. Revenues are accrued for 
gas delivered and services rendered to customers, but not 
yet billed, based on estimates from the last meter reading 
date to month end (accrued unbilled revenue). Accrued 
unbilled revenue is based on a percentage estimate of 
amounts unbilled each month, which is dependent upon a 
number of factors, some of which require management’s 
judgment. These factors include:
• 
• 
• 
•  weather. 

total gas receipts and deliveries; 
customer meter reading dates; 
customer usage patterns; and

Accrued unbilled revenue estimates are reversed the 
following month when actual billings occur. Estimated 
unbilled revenue at December 31, 2012 and 2011 was 
$57.0 million and $61.9 million, respectively. The decrease 
in accrued unbilled revenue at year-end 2012 was primarily 
due to lower volumes in December 2012, reflecting warmer 
weather late in the month, and lower customer billing rates. 

43

 
accumulated other comprehensive income (AOCI) under 
common stock equity on the balance sheet. Our derivative 
contracts outstanding at December 31, 2012 were 
measured at fair value using models or other market 
accepted valuation methodologies derived from observable 
market data. Our estimate of fair value may change 
significantly from period-to-period depending on market 
conditions and prices. These changes may have an impact 
on our results of operations, but the impact would largely be 
mitigated due to the majority of our derivative activities 
being subject to regulatory deferral treatment. For estimated 
fair value of unrealized gains and losses, see Note 13.
Commodity-based derivative contracts entered into by the 
utility after our annual PGA filing for the current gas contract 
period are subject to a regulatory incentive sharing 
mechanism in Oregon. See “Results of Operations—
Regulatory Matters—Rate Mechanisms—Purchased Gas 
Adjustment” above. The portion not deferred to a regulatory 
account pursuant to that sharing agreement is recognized 
either in current income for contracts not qualifying for 
hedge accounting or in AOCI for contracts qualifying for 
hedge accounting.

Derivative contracts not qualifying for regulatory deferral are 
subject to a hedge effectiveness test to determine the 
financial statement treatment of each specific derivative. As 
of December 31, 2012, all of our derivatives were effective 
economic hedges and either qualified or were expected to 
qualify for regulatory deferral or hedge accounting 
treatment. We use the hypothetical derivative method under 
accounting standards for derivatives and hedging to 
determine the hedge effectiveness for our interest rate 
swaps and the dollar offset method for other derivative 
contracts under accounting standards for derivatives and 
hedging. The effectiveness test applied to financial 
derivatives is dependent on the type of derivative and its 
use.

The following table summarizes the amount of gains and 
losses realized from commodity price, interest rate and 
currency hedge transactions for the last three years:

In millions

2012

2011

2010

Net utility gain (loss) on:

Commodity-price swaps

$

(69.5) $

(53.8) $

(60.4)

Commodity-price options

Subtotal 

Foreign currency forward 
purchases

(0.7)

(70.2)

(2.7)

(56.5)

(0.6)

(61.0)

—

(0.1)

0.1

Total net loss realized

$

(70.2) $

(56.6) $

(60.9)

Realized gains (losses) from commodity hedges and foreign 
currency forward purchase contracts shown above were 
recorded as reductions (increases) to cost of gas and were 
included in our annual PGA rates.

The following table presents changes in key metrics if the 
estimated percentage of unbilled volume at December 31, 
2012 was adjusted up or down by 1%:

In millions

2012

Up 1%

Down 1%

Unbilled revenue increase (decrease)

$

2.0

$

(1.9)

Utility margin decrease

Net income decrease

(0.4)

(0.2)

0.4

0.2

SENATE BILL 408 AND 967. From 2007 through 2010, utility 
revenues included the recognition of a regulatory 
adjustment for income taxes paid (commonly referred to as 
SB 408). Under SB 408, utilities were required to 
automatically implement a rate refund, or a rate surcharge, 
to utility customers on an annual basis. The refund or 
surcharge amount was based on estimated differences 
between income taxes paid and income taxes collected in 
customer rates. We recorded the refund, or surcharge, each 
quarter based on the annual amount to be recognized. In 
2011 SB 967 effectively repealed SB 408. The new law 
required utilities in Oregon to reverse amounts accrued for 
the 2010 and 2011 tax years, which resulted in us recording 
a one-time pre-tax charge to earnings in the second quarter 
of 2011 in the amount of $7.4 million ($4.4 million after-tax 
or 17 cents per share). For further discussion, see “Results 
of Operations—Business Segments-Local Gas Distribution 
"Utility Operations—Regulatory Adjustment for Income 
Taxes Paid” above.

NON-UTILITY REVENUES. Non-utility revenues, derived 
primarily from our gas storage segment, are recognized 
upon delivery of service to customers. Revenues from our 
asset management partner are recognized as earned based 
on multiple revenue elements, which is generally over the 
period of each asset management deal, except for contracts 
with a guaranteed amount, which are amortized pro-rata 
over the life of the contract.

Accounting for Derivative Instruments and Hedging 
Activities  
Our gas acquisition and hedging policies set forth guidelines 
for using financial derivative instruments to support prudent 
risk management strategies. These policies specifically 
prohibit the use of derivatives for trading or speculative 
purposes. The accounting rules for determining whether a 
contract meets the definition of a derivative instrument or 
qualifies for hedge accounting treatment are complex. The 
contracts that meet the definition of a derivative instrument 
are recorded on our balance sheet at fair value. If certain 
regulatory conditions are met, then the derivative instrument 
fair value is recorded together with an offsetting entry to a 
regulatory asset or liability account pursuant to regulatory 
accounting (see Note 2, “Industry Regulation”), and no 
unrealized gain or loss is recognized in current income. The 
gain or loss from the fair value of a derivative instrument 
subject to regulatory deferral is included in the recovery 
from, or refund to, utility customers in future periods (see 
“Regulatory Accounting,” above). If a derivative contract is 
not subject to regulatory deferral, then the accounting 
treatment for unrealized gains and losses is recorded in 
accordance with accounting standards for derivatives and 
hedging (see Note 2, “Derivatives” and “Industry 
Regulation”) which is either in current income or in 

44

  
  
 
  
 
Accounting for Pensions and Postretirement 
Benefits
We maintain a qualified non-contributory defined benefit 
pension plan covering a majority of our utility employees, 
several non-qualified supplemental pension plans for 
eligible executive officers and certain key employees, and 
other postretirement employee benefit plans covering 
certain non-union employees. We also have a qualified 
defined contribution plan (Retirement K Savings Plan) for all 
eligible employees. Only the qualified defined benefit 
pension plan and Retirement K Savings Plan have plan 
assets, which are held in qualified trusts to fund the 
respective retirement benefits. Effective December 31, 
2012, the defined benefit pension plans for union and non-
union employees were merged into one plan. The qualified 
defined benefit retirement plans for union and non-union 
employees were closed to new participants several years 
ago. These plans were not available to employees at any of 
our subsidiary companies. We currently offer our utility and 
subsidiary employees an enhanced Retirement K Savings 
Plan benefit. The postretirement Welfare Benefit Plan for 
non-union employees was also closed to new participants 
several years ago.

Net periodic pension and postretirement benefit costs 
(retirement benefit costs) and projected benefit obligations 
(benefit obligations) are determined using a number of key 
assumptions including discount rates, rate of compensation 
increases, retirement ages, mortality rates and an expected 
long-term return on plan assets. See Note 8. These key 
assumptions have a significant impact on the pension 
amounts recorded and disclosed. Retirement benefit costs 
consist of service costs, interest costs, the amortization of 
actuarial gains, losses and prior service costs, the expected 
returns on plan assets and, in part, on a market-related 
valuation of assets, if applicable. The market-related asset 
valuation reflects differences between expected returns and 
actual investment returns, which we recognize over a three-
year period or less from the year in which they occur, 
thereby reducing year-to-year volatility in retirement benefit 
costs.

Accounting standards also require balance sheet 
recognition of the overfunded or underfunded status of 
pension and postretirement benefit plans in AOCI, net of 
tax, based on the fair value of plan assets compared to the 
actuarial value of future benefit obligations. However, the 
retirement benefit costs related to our qualified defined 
benefit pension and postretirement benefit plans are 
generally recovered in utility rates, which are set based on 
accounting standards for pensions and postretirement 
benefit expenses. We also received approval from the 
OPUC pursuant to regulatory accounting to recognize the 
overfunded or underfunded status as a regulatory asset or 
regulatory liability based on expected rate recovery, rather 
than including it as AOCI under common equity. See 
“Regulatory Accounting” above and Note 2, “Industry 
Regulation”.

In 2011, we received regulatory approval from the OPUC 
and began deferring a portion of our pension expense 
above or below the amount set in rates to a regulatory 
balancing account on the balance sheet. In 2012, the 
cumulative amount deferred for future pension cost recovery 
was $15.0 million. The regulatory balancing account earns a 
carrying cost at the authorized cost of capital rate set by the 
OPUC.

A number of factors are considered in developing pension 
and postretirement benefit assumptions, including 
evaluations of relevant discount rates, an evaluation of 
expected long-term investment returns, expected changes 
in salaries and wages, analyses of past retirement plan 
experience and current market conditions and input from 
actuaries and other consultants. For the December 31, 2012 
measurement date, we reviewed and updated:
• 

our weighted-average discount rate assumptions for 
pensions and other postretirement benefits, which went 
from 4.51% to 3.85% and from 4.33% to 3.56%, 
respectively. The new rate assumptions were 
determined for each plan based on a matching of 
benchmark interest rates to the estimated cash flows, 
which reflects the timing and amount of future benefit 
payments. Benchmark interest rates are drawn from the 
Citigroup Above Median Curve, which consists of high 
quality bonds rated AA- or higher by S&P or Aa3 or 
higher by Moody’s;
our expected annual rate of future compensation 
increases, which remained unchanged at a range of 
3.25% to 5.0%;
our expected long-term return on qualified defined 
benefit plan assets, which was reduced from 8.00% to 
7.50%; and
other key assumptions, which were based on actual 
plan experience and actuarial recommendations.

• 

• 

• 

At December 31, 2012, our net pension liability (benefit 
obligations less market value of plan assets) for the 
qualified defined benefit plan increased $7.4 million 
compared to 2011. The increase in our net pension liability 
is primarily due to the $41.1 million increase in our pension 
benefit obligation, offset by an increase of $33.6 million in 
plan assets. The liability for non-qualified plans increased 
$3.7 million, and the liability for other postretirement benefits 
increased $3.1 million in 2012.

We determine the expected long-term rate of return on plan 
assets by averaging the expected earnings for the target 
asset portfolio. In developing our expected return, we 
evaluate an analysis of historical actual performance and 
long-term return projections, which gives consideration to 
the current asset mix and our target asset allocation. As of 
December 31, 2012, the actual annualized returns on plan 
assets, net of management fees, for the past one-year, five-
years, 10-years and since inception were 12.4%, 0.9%, 
7.1% and 10.0%, respectively.

45

  
  
We believe our pension assumptions to be appropriate 
based on plan design and an assessment of market 
conditions. However, the following shows the sensitivity of 
our retirement benefit costs and benefit obligations to future 
changes in certain actuarial assumptions:

Impact on 
2012
Retirement 
Benefit 
Costs

Impact on 
Retirement
Benefit 
Obligations 
at Dec. 31, 
2012

Change in 
Assumption

(0.25)%

  $

1.2

$

—

0.1

13.6

0.9

0.9

(0.25)

0.6

N/A

Dollars in millions

Discount rate:

Qualified defined
benefit plans

Non-qualified plans

Other
postretirement
benefits

Expected long-term
return on plan assets:

Qualified defined
benefit plans

In July 2012, President Obama signed into law the Moving 
Ahead for Progress in the 21st Century Act (MAP-21 Act). 
This legislation changes several provisions affecting 
pension plans, including temporary funding relief and 
Pension Benefit Guaranty Corporation (PBGC) premium 
increases, which reduces the level of minimum required 
contributions in the near-term but generally increases 
contributions in the long-run as well as increasing the 
operational costs of running a pension plan. Prior to the 
MAP-21 Act, we were using interest rates based on a 24-
month average yield of investment grade corporate bonds 
(also referred to as “segment rate”) to calculate minimum 
contribution requirements. MAP-21 Act established a new 
minimum and maximum corridor for segment rates based 
on a 25-year average of bond yields, which is to be used in 
calculating contribution requirements. For 2013, the new 
corridor will be set at no less than 85% and no more than 
115% of the corresponding 25-year average segment rate. 
In 2014, the corridor widens to 80% to 120% of the 25-year 
average, and the corridor continues to widen by 5% each 
year thereafter until reaching 70% to 130%. Under current 
market conditions, we estimate the segment rate for the 
2013 Plan Year will increase from approximately 4.90% to 
6.25%, and this 1.35% increase in interest rates would 
reduce our minimum contribution requirement by 
approximately $15 million, from roughly $26 million under 
the unadjusted 24-month segment rate to roughly $11 
million under the adjusted 24-month segment rate using the 
85% to 115% corridor.   

Accounting for Income Taxes
We account for income taxes in accordance with accounting 
standards that require the recognition of deferred tax assets 
and liabilities for the expected future tax consequences of 
temporary differences between financial statement carrying 
amount and tax basis of assets and liabilities. Deferred tax 
assets and liabilities are measured using enacted tax rates 
expected to apply to taxable income in the years in which 
those temporary differences are expected to be recovered 
or settled. At December 31, 2012 and 2011, our net long-
term deferred tax liability totaled $446.6 million and $413.2 
million, respectively. After application of the federal statutory 

tax rate to book income, judgment is required with respect 
to the timing and deductibility of expense in our tax returns. 
For state and local income taxes, judgment is also required 
with respect to the apportionment among the various 
jurisdictions. A valuation allowance is recorded if we expect 
that it is “more likely than not” that our deferred tax assets 
will not be realized. At December 31, 2012, we did not 
record a valuation allowance due to our expectation that all 
of these assets and liabilities will be realized.

These accounting standards also require the recognition of 
deferred income tax assets and liabilities for temporary 
differences where regulators require us to flow through 
deferred income tax benefits or expenses in the ratemaking 
process of the regulated utility (regulatory tax assets and 
liabilities). This is consistent with the ratemaking policies of 
the OPUC and WUTC. Regulatory tax assets and liabilities 
are recorded to the extent we believe they will be 
recoverable from, or refunded to, customers in future rates. 
As part of the Oregon general rate case, the OPUC ruled 
that we cannot recover deferred amounts that represent the 
increase in deferred income taxes caused by the 2009 
Oregon tax rate change. As a result, we have recognized a 
one time, after tax charge of $2.7 million in 2012 to write off 
the regulatory asset related to this rate change. At 
December 31, 2012 and 2011, we had regulatory assets 
representing differences between book and tax basis 
related to pre-1981 property of $60.3 million and $68.5 
million, respectively, and recorded an offsetting deferred tax 
liability. We are currently recovering these pre-1981 
deferred tax assets over a period of approximately 25 years. 
See Note 2 and Note 9.

Uncertain tax positions are accounted for in accordance 
with accounting standards that require management’s 
assessment of the expected treatment of a tax position 
taken in a filed tax return, or planned to be taken in a future 
tax return, that has not been reflected in measuring income 
tax expense for financial reporting purposes. Until such 
positions are sustained by the taxing authorities, we would 
not recognize the tax benefits resulting from such positions 
and would report the tax effect as a liability in the 
Company’s consolidated balance sheet. As of December 
31, 2012, we had no reserves for uncertain tax positions.

In 2012, the Company settled an examination of tax years 
2006 through 2009 with the state of Oregon. This settlement 
resulted in an additional $0.2 million state tax expense due 
to Oregon, including interest. However, the Company also 
filed an amended tax return with the state of California for 
tax year 2007 in which it claimed a refund of $0.2 million 
and recognized a reduction in state tax expense of $0.2 
million. The net effect of these two state tax changes was 
negligible. 

Interest and penalties related to any future income tax 
deficiencies would be recorded in income tax expense in 
our consolidated statements of income.

Accounting for Environmental Contingencies  
Loss contingencies are recorded as liabilities when it is 
probable that a liability has been incurred and the amount of 
the loss is reasonably estimable in accordance with 
accounting standards for contingencies. Estimates of loss 
contingencies, including estimates of legal costs when such 

46

 
 
 
 
 
 
 
 
 
 
costs are probable of being incurred and are reasonably 
estimable and related disclosures are updated when new 
information becomes available. Estimating probable losses 
requires an analysis of uncertainties that often depend upon 
judgments about potential actions by third parties. Accruals 
for loss contingencies are recorded based on an analysis of 
potential results. When information is sufficient to estimate 
only a range of potential liabilities, and no point within the 
range is more likely than any other, we recognize an 
accrued liability at the low end of the range and disclose the 
range. See “Contingent Liabilities” above. It is possible, 
however, that the range of potential liabilities could be 
significantly different than amounts currently accrued and 
disclosed, with the result that our financial condition and 
results of operations could be materially affected by 
changes in the assumptions or estimates related to these 
contingencies.

With respect to environmental liabilities and related costs, 
we develop estimates based on a review of information 
available from numerous sources, including completed 
studies and site specific negotiations. Using sampling data, 
feasibility studies, existing technology, and enacted laws 
and regulations, we estimate that the total future 
expenditures for environmental investigation, monitoring 
and remediation are $69.7 million as of December 31, 2012. 
It is our policy to accrue the full amount of such liability 
when information is sufficient to reasonably estimate the 
amount of probable liability. When information is not 
available to reasonably estimate the probable liability, or 
when only the range of probable liabilities can be estimated 
and no amount within the range is more likely than another, 
then it is our policy to accrue at the low end of the range. 
Accordingly, due to numerous uncertainties surrounding the 
course of environmental remediation and the preliminary 
nature of several site investigations, in some cases, we may 
not be able to reasonably estimate the high end of the range 
of possible loss. In those cases we have disclosed the 
nature of the potential loss and the fact that the high end of 
the range cannot be reasonably estimated.

We continue to seek recovery of such costs through 
insurance and through customer rates, and we believe 
recovery of these costs is probable. Pursuant to the 2012 
Oregon general rate case, environmental cost deferrals will 
be recovered under the new SRRM subject to a reduction 
for separate insurance recoveries, a prudence review, and 
an earnings test that will be defined in a separate regulatory 
proceeding, which is currently open. As there is uncertainty 
surrounding the outcome of this proceeding, we will 
continue to carefully assess these environmental assets for 
recoverability. If it is determined that both the insurance 
recovery and future rate recovery of such costs are not 
probable, the costs will be charged to expense in the period 
such determination is made. See "Results of Operations—
Rate Matters—Rate Mechanisms—Environmental Costs" 
above and Note 15.

ITEM 7A. QUANTITATIVE AND QUALITATIVE 
DISCLOSURES ABOUT MARKET RISK

We are exposed to various forms of market risk including 
commodity supply risk, commodity price risk, interest rate 
risk, foreign currency risk, credit risk and weather risk. The 
following describes our exposure to these risks.

47

Commodity Supply Risk
We enter into spot, short-term, and long-term natural gas 
supply contracts, along with associated pipeline 
transportation contracts, to manage our commodity supply 
risk. Historically, we have arranged for physical delivery of 
an adequate supply of gas, including gas in our Mist storage 
facility, to meet expected requirements of our core utility 
customers. Our gas purchase contracts are primarily index-
based and subject to monthly re-pricing, a strategy that is 
intended substantially mitigate credit exposure to our 
physical gas counterparties.

Commodity Price and Storage Value Risk
Natural gas commodity prices and storage values are 
subject to market fluctuations due to unpredictable factors 
including weather, pipeline transportation congestion, drilling 
technologies, potential market speculation and other factors 
that affect supply and demand. In addition to managing 
storage positions through a combination of short- and long-
term fixed price contracts, we use commodity-price financial 
swap and option contracts (financial hedge contracts) to 
convert certain natural gas supply contracts from floating 
prices to fixed or capped prices. We also hedge with 
physical gas reserves from a long-term investment in 
working interests in gas leases operated by Encana. These 
financial hedge contracts and gas reserve volumes are 
generally included in our annual PGA filing for recovery, 
subject to a regulatory prudence review. We also regularly 
monitor and manage the financial exposure and liquidity risk 
of our storage position.

Interest Rate Risk
We are exposed to interest rate risk primarily associated 
with new debt financing needed to fund capital 
requirements, including future contractual obligations and 
maturities of long-term and short-term debt. Interest rate risk 
is primarily managed through the issuance of fixed-rate debt 
with varying maturities. We may also enter into financial 
derivative instruments, including interest rate swaps, options 
and other hedging instruments, to manage and mitigate 
interest rate exposure.

Foreign Currency Risk
The costs of certain natural gas commodity supplies and 
certain pipeline services purchased from Canadian 
suppliers are subject to changes in the value of the 
Canadian currency in relation to the U.S. currency. Foreign 
currency forward contracts are used to hedge against 
fluctuations in exchange rates for our commodity and 
commodity related demand charges paid in Canadian 
dollars. At December 31, 2012 and 2011, notional amounts 
under foreign currency forward contracts totaled $13.2 
million and $12.3 million, respectively. As of December 31, 
2012, all foreign currency forward contracts mature within 
one year. If all of the foreign currency forward contracts had 
been settled on December 31, 2012, a gain of $0.1 million 
would have been realized. See Note 13.

Credit Risk
CREDIT EXPOSURE TO NATURAL GAS SUPPLIERS. Certain 
gas suppliers have either relatively low credit ratings or are 
not rated by major credit rating agencies. To manage this 
supply risk, we purchase gas from a number of different 
suppliers at liquid exchange points. We evaluate and 
monitor suppliers’ creditworthiness and maintain the ability 

 
 
  
  
 
  
cash or marketable securities as collateral with one day’s 
notice. We use various collateral management strategies to 
reduce liquidity risk. The collateral provisions vary by 
counterparty but are not expected to result in the significant 
posting of collateral, if any. We have performed stress tests 
on the portfolio and concluded that the liquidity risk from 
collateral calls is not material. Our derivative credit exposure 
is primarily with investment grade counterparties rated AA-/
Aa3 or higher. Contracts are diversified across 
counterparties to reduce credit and liquidity risk.

CREDIT EXPOSURE TO INSURANCE COMPANIES FOR 
ENVIRONMENTAL DAMAGE CLAIMS. We regularly monitor 
the financial condition of insurance companies who provide 
or provided general liability insurance policy coverage to 
NW Natural and its predecessors with respect to 
environmental damage claims. We have filed claims for our 
environmental costs with a number of insurance companies. 
The majority of these companies have credit ratings of A- or 
better from A.M. Best Co. (AM Best). AM Best is a global 
independent credit rating agency who has provided 
quantitative and qualitative analysis of insurance company 
balance sheet strength for over 100 years. AM Best uses a 
rating scale that ranges from A++ (“Superior” financial 
strength) to F (“In Liquidation”), with a rating of A- 
considered “Excellent.” A strong credit rating from AM Best 
is not a guarantee that an insurance company will be able to 
meet its contractual obligations. The remaining insurance 
companies who do not have credit ratings of A- or better are 
expected to have sufficient funds in reserves to cover these 
claims. Our credit exposure to insurance companies for 
environmental claims, which reflects amounts we believe 
are owed to us, could be material. In the event we are 
unable to recover environmental expenses from these 
insurance policies, we will seek recovery of unreimbursed 
amounts through customer rates.

Weather Risk 
We are exposed to weather risk primarily from our regulated 
utility business. A large percentage of our utility margin is 
volume driven, and current rates are based on an 
assumption of average weather. We have a weather 
normalization mechanism for residential and commercial 
customers, which is intended to stabilize the recovery of our 
utility’s fixed costs and reduce fluctuations in customers’ 
bills due to colder or warmer than average weather. 
Customers in Oregon are allowed to opt out of the weather 
normalization mechanism. As of December 31, 2012, 
approximately 9% of our Oregon customers had opted out. 
In addition to the Oregon customers opting out, our 
Washington residential and commercial customers account 
for approximately 10% of our total customer base and are 
not covered by weather normalization. The combination of 
Oregon and Washington customers not covered by a 
weather normalization mechanism is less than 20% of all 
residential and commercial customers. See "Results of 
Operations—Regulatory Matters—Rate Mechanism—
Weather Normalization Tariff" above.

to require additional financial assurances, including 
deposits, letters of credit, or surety bonds, in case a supplier 
defaults. In the event of a supplier’s failure to deliver 
contracted volumes of gas, the regulated utility would need 
to replace those volumes at prevailing market prices, which 
may be higher or lower than the original transaction prices. 
We expect these costs would be subject to our PGA sharing 
mechanism discussed above. Since most of our commodity 
supply contracts are priced at the monthly market index 
price tied to liquid exchange points, and we have significant 
storage flexibility, we believe that it is unlikely that a supplier 
default would have an adverse effect on our financial 
condition or results of operations.

CREDIT EXPOSURE TO FINANCIAL DERIVATIVE 
COUNTERPARTIES. Based on estimated fair value at 
December 31, 2012, our overall credit exposure relating to 
commodity hedge contracts is considered to be immaterial 
as it reflects amounts we owed to our financial derivative 
counterparties (see table below). However, changes in 
natural gas prices could result in counterparties owing us 
money. Therefore, our financial derivatives policy requires 
counterparties to have at least an investment-grade credit 
rating at the time the derivative instrument is entered into 
and specific limits on the contract amount and duration 
based on each counterparty’s credit rating. Due to potential 
changes in market conditions and credit concerns, we 
continue to enforce strong credit requirements. We actively 
monitor and manage our derivative credit exposure and 
place counterparties on hold for trading purposes or require 
cash collateral, letters of credit, or guarantees as 
circumstances warrant. As of December 31, 2012, we do 
not have any actual derivative credit risk exposure, which 
reflects amounts that financial derivative counterparties owe 
to us.

The following table summarizes our overall credit exposure, 
based on estimated fair value, and the corresponding 
counterparty credit ratings. The table uses credit ratings 
from S&P and Moody’s, reflecting the higher of the S&P or 
Moody’s rating or a middle rating if the entity is split-rated 
with more than one rating level difference:

In millions

AAA/Aaa

AA/Aa

A/A

BBB/Baa

Total

Financial Derivative Position by Credit Rating
Unrealized Fair Value Loss

2012

2011

$

$

— $

(5.0)

—

—

(5.0) $

—

(57.6)

(5.9)

—

(63.5)

In most cases, we also mitigate the credit risk of financial 
derivatives by having master netting arrangements with our 
counterparties which provide for making or receiving net 
cash settlements. Generally, transactions of the same type 
in the same currency that have a settlement on the same 
day with a single counterparty are netted and a single 
payment is delivered or received depending on which party
is due funds.

Additionally we have master contracts in place with each 
of our derivative counterparties that include provisions for 
posting or calling for collateral. Generally we can obtain 

48

 
 
[THIS PAGE INTENTIONALLY LEFT BLANK]

ITEM 8. FINANCIAL STATEMENTS AND SUPPLEMENTARY DATA

TABLE OF CONTENTS

1.

2.

3.

4.

5.

Management’s Report on Internal Control Over Financial Reporting

Report of Independent Registered Public Accounting Firm

Consolidated Financial Statements:

Consolidated Statements of Comprehensive Income for the Years Ended December 31, 2012, 2011, and 2010

Consolidated Balance Sheets at December 31, 2012 and 2011

Consolidated Statements of Shareholders’ Equity for the Years Ended December 31, 2012, 2011, and 2010

Consolidated Statements of Cash Flows for the Years Ended December 31, 2012, 2011, and 2010

Notes to Consolidated Financial Statements

Quarterly Financial Information (Unaudited)

Supplementary Data for the Years Ended December 31, 2012, 2011, and 2010:

Financial Statement Schedule

Schedule II – Valuation and Qualifying Accounts and Reserves

Supplemental Schedules Omitted

Page

50

51

52

53

55

56

57

81

81

All other schedules are omitted because of the absence of the conditions under which they are required or because the required 
information is included elsewhere in the financial statements.

49

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
MANAGEMENT’S REPORT ON INTERNAL CONTROL OVER FINANCIAL REPORTING

Management is responsible for establishing and maintaining adequate internal control over financial reporting as defined in 
Rules 13a-15(f) and 15d-15(f) under the Securities Exchange Act of 1934, as amended. Our internal control over financial 
reporting is designed to provide reasonable assurance regarding the reliability of financial reporting and the preparation of 
financial statements for external purposes in accordance with generally accepted accounting principles in the United States of 
America (GAAP). Our internal control over financial reporting includes those policies and procedures that:

(i) pertain to the maintenance of records that, in reasonable detail, accurately and fairly reflect the transactions and dispositions 
involving company assets;

(ii) provide reasonable assurance that transactions are recorded as necessary to permit the preparation of financial statements 
in accordance with GAAP, and that receipts and expenditures are being made only in accordance with authorizations of 
management and the Board of Directors; and

(iii) provide reasonable assurance regarding prevention or timely detection of the unauthorized acquisition, use or disposition of 
our assets that could have a material effect on the financial statements.

Because of its inherent limitations, internal control over financial reporting may not prevent or detect misstatements or fraud. 
Also, projections of any evaluation of effectiveness to future periods are subject to the risk that controls may become inadequate 
because of changes in conditions, or that the degree of compliance with the policies or procedures may deteriorate.

Management assessed the effectiveness of our internal control over financial reporting as of December 31, 2012. In making this 
assessment, management used the criteria set forth by the Committee of Sponsoring Organizations of the Treadway 
Commission (COSO) in Internal Control-Integrated Framework.

Based on our assessment and those criteria, management has concluded that we maintained effective internal control over 
financial reporting as of December 31, 2012.

The effectiveness of internal control over financial reporting as of December 31, 2012 has been audited by 
PricewaterhouseCoopers LLP, an independent registered public accounting firm, as stated in their report which appears in this 
annual report.

/s/ Gregg S. Kantor        
Gregg S. Kantor
President and Chief Executive Officer

/s/ Stephen P. Feltz     
Stephen P. Feltz
Senior Vice President and Chief Financial Officer

March 1, 2013

50

 
 
 
  
 
 
 
 
  
 
REPORT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

To the Board of Directors and Shareholders of
Northwest Natural Gas Company:

In our opinion, the consolidated financial statements listed in the accompanying table of contents present fairly, in all material 
respects, the financial position of Northwest Natural Gas Company and its subsidiaries at December 31, 2012 and 2011, and the 
results of their operations and their cash flows for each of the three years in the period ended December 31, 2012 in conformity 
with accounting principles generally accepted in the United States of America. In addition, in our opinion, the financial statement 
schedule listed in the accompanying table of contents presents fairly, in all material respects, the information set forth therein 
when read in conjunction with the related consolidated financial statements. Also in our opinion, the Company maintained, in all 
material respects, effective internal control over financial reporting as of December 31, 2012, based on criteria established in 
Internal Control - Integrated Framework issued by the Committee of Sponsoring Organizations of the Treadway Commission 
(COSO). The Company's management is responsible for these financial statements and financial statement schedule, for 
maintaining effective internal control over financial reporting and for its assessment of the effectiveness of internal control over 
financial reporting, included in the accompanying Management's Report on Internal Control over Financial Reporting. Our 
responsibility is to express opinions on these financial statements, on the financial statement schedule, and on the Company's 
internal control over financial reporting based on our integrated audits. We conducted our audits in accordance with the 
standards of the Public Company Accounting Oversight Board (United States). Those standards require that we plan and 
perform the audits to obtain reasonable assurance about whether the financial statements are free of material misstatement and 
whether effective internal control over financial reporting was maintained in all material respects. Our audits of the financial 
statements included examining, on a test basis, evidence supporting the amounts and disclosures in the financial statements, 
assessing the accounting principles used and significant estimates made by management, and evaluating the overall financial 
statement presentation. Our audit of internal control over financial reporting included obtaining an understanding of internal 
control over financial reporting, assessing the risk that a material weakness exists, and testing and evaluating the design and 
operating effectiveness of internal control based on the assessed risk. Our audits also included performing such other 
procedures as we considered necessary in the circumstances. We believe that our audits provide a reasonable basis for our 
opinions.

A company’s internal control over financial reporting is a process designed to provide reasonable assurance regarding the 
reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally 
accepted accounting principles. A company’s internal control over financial reporting includes those policies and procedures that 
(i) pertain to the maintenance of records that, in reasonable detail, accurately and fairly reflect the transactions and dispositions 
of the assets of the company; (ii) provide reasonable assurance that transactions are recorded as necessary to permit 
preparation of financial statements in accordance with generally accepted accounting principles, and that receipts and 
expenditures of the company are being made only in accordance with authorizations of management and directors of the 
company; and (iii) provide reasonable assurance regarding prevention or timely detection of unauthorized acquisition, use, or 
disposition of the company’s assets that could have a material effect on the financial statements.

Because of its inherent limitations, internal control over financial reporting may not prevent or detect misstatements. Also, 
projections of any evaluation of effectiveness to future periods are subject to the risk that controls may become inadequate 
because of changes in conditions, or that the degree of compliance with the policies or procedures may deteriorate.

/s/ PricewaterhouseCoopers LLP

Portland, Oregon
March 1, 2013 

51

 
  
 
 
 
NORTHWEST NATURAL GAS COMPANY
CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME

In thousands, except per share data

Operating revenues

Operating expenses:

Cost of gas

Operations and maintenance

General taxes

Depreciation and amortization

Total operating expenses

Income from operations

Other income and expense, net

Interest expense, net

Income before income taxes

Income tax expense 

Net income 

Other comprehensive income:

Change in employee benefit plan liability, net of taxes of $1,339 for 2012, $1,161
for 2011, and $674 for 2010
Amortization of non-qualified employee benefit plan liability, net of taxes of ($434)
for 2012, ($383) for 2011, and ($257) for 2010

Comprehensive income

Average common shares outstanding:

Basic

Diluted

Earnings per share of common stock:

Basic

Diluted

Dividends declared per share of common stock

Year Ended December 31,

2012

2011

2010

$ 730,607

$ 828,055

$ 792,115

355,335

129,477

30,598

73,017

588,427

142,180

4,936

43,157

458,508

125,417

29,281

70,004

683,210

144,845

4,523

42,088

424,494

121,020

23,872

65,124

634,510

157,605

7,102

42,578

103,959

107,280

122,129

44,104

59,855

43,382

63,898

49,462

72,667

(2,156)

(1,779)

(1,027)

665

583

391

$

58,364

$

62,702

$

72,031

26,831

26,907

26,687

26,744

26,589

26,657

$

$

2.23

2.22

1.79

$

2.39

2.39

1.75

2.73

2.73

1.68

See Notes to Consolidated Financial Statements

52

NORTHWEST NATURAL GAS COMPANY
CONSOLIDATED BALANCE SHEETS

In thousands

Assets:

Current assets:

Cash and cash equivalents

Accounts receivable

Accrued unbilled revenue

Allowance for uncollectible accounts

Regulatory assets

Derivative instruments

Inventories

Gas reserves

Income taxes receivable

Other current assets

Total current assets

Non-current assets:

Property, plant, and equipment

Less: Accumulated depreciation

Total property, plant, and equipment, net

Gas reserves

Regulatory assets

Derivative instruments

Other investments

Restricted cash

Other non-current assets

Total non-current assets

Total assets

As of December 31,

2012

2011

$

8,923

$

61,229

56,955

(2,518)

52,448

1,950

67,602

14,966

2,552

19,592

283,699

5,833

77,449

61,925

(2,895)

94,673

2,853

74,363

4,463

7,045

22,980

348,689

2,786,008

2,661,102

812,396

767,226

1,973,612

1,893,876

84,693

387,888

3,639

67,667

4,000

13,555

47,451

371,392

—

68,263

4,000

12,903

2,535,054

2,397,885

$

2,818,753

$

2,746,574

See Notes to Consolidated Financial Statements

53

NORTHWEST NATURAL GAS COMPANY
CONSOLIDATED BALANCE SHEETS

In thousands

Liabilities and equity:

Current liabilities:

Short-term debt

Current maturities of long-term debt

Accounts payable

Taxes accrued

Interest accrued

Regulatory liabilities

Derivative instruments

Other current liabilities

Total current liabilities

Long-term debt

Deferred credits and other non-current liabilities:

Deferred tax liabilities

Regulatory liabilities

Pension and other postretirement benefit liabilities

Derivative instruments

Other non-current liabilities

Total deferred credits and other non-current liabilities

Commitments and contingencies (see Note 14 and Note 15)

Equity:

Common stock - no par value; authorized 100,000 shares; issued and outstanding 26,917
and 26,756 at December 31, 2012 and 2011, respectively

Retained earnings

Accumulated other comprehensive loss

Total equity

Total liabilities and equity

See Notes to Consolidated Financial Statements

As of December 31,

2012

2011

$

190,250

$

141,600

—

85,613

9,588

5,953

20,792

10,796

45,444

368,436

691,700

446,604

288,113

215,792

578

74,497

1,025,584

—

40,000

86,300

10,747

5,857

31,046

57,317

41,597

414,464

641,700

413,209

278,382

201,530

6,536

76,265

975,922

—

356,571

385,753

(9,291)

733,033

348,383

373,905

(7,800)

714,488

$

2,818,753

$

2,746,574

54

 
NORTHWEST NATURAL GAS COMPANY
CONSOLIDATED STATEMENTS OF SHAREHOLDERS' EQUITY

In thousands

Balance at Dec. 31, 2009

   Comprehensive income

   Dividends paid on common stock

   Tax expense from employee stock option plan

   Stock-based compensation

   Issuance of common stock

Balance at Dec. 31, 2010

   Comprehensive income

   Dividends paid on common stock

   Tax expense from employee stock option plan

   Stock-based compensation

   Issuance of common stock

   Common stock expense

Balance at Dec. 31, 2011

   Comprehensive income

   Dividends paid on common stock

   Tax expense from employee stock option plan

   Stock-based compensation

   Issuance of common stock

Balance at Dec. 31, 2012

Common 
Stock

Retained 
Earnings

Accumulated
Other
Comprehensive
Income (Loss)

Total
Equity

$

337,361

$

328,712

$

(5,968) $

660,105

—

—

(125)

554

5,188

342,978

—

—

(26)

1,769

3,632

30

348,383

—

—

(149)

1,291

7,046

72,667

(44,652)

—

—

—

356,727

63,898

(46,690)

—

—

—

(30)

373,905

59,855

(48,007)

—

—

—

(636)

—

—

—

—

(6,604)

(1,196)

—

—

—

—

—

(7,800)

(1,491)

—

—

—

—

72,031

(44,652)

(125)

554

5,188

693,101

62,702

(46,690)

(26)

1,769

3,632

—

714,488

58,364

(48,007)

(149)

1,291

7,046

$

356,571

$

385,753

$

(9,291) $

733,033

See Notes to Consolidated Financial Statements

55

NORTHWEST NATURAL GAS COMPANY
CONSOLIDATED STATEMENTS OF CASH FLOWS

In thousands

Operating activities:

Net income

Adjustments to reconcile net income to cash provided by operations:

Depreciation and amortization

Deferred tax liabilities

Non-cash expenses related to qualified defined benefit pension plans

Contributions to qualified defined benefit pension plans

Deferred environmental expenditures, net of recoveries

Other

Changes in assets and liabilities:

Receivables

Inventories

Taxes accrued

Accounts payable

Interest accrued

Deferred gas costs

Other, net

Cash provided by operating activities

Investing activities:

Capital expenditures

Utility gas reserves

Restricted cash

Other

Cash used in investing activities

Financing activities:

Common stock issued, net

Long-term debt issued

Long-term debt retired

Change in short-term debt

Cash dividend payments on common stock

Other

Cash provided by (used in) financing activities

Increase (decrease) in cash and cash equivalents

Cash and cash equivalents, beginning of period

Cash and cash equivalents, end of period

Supplemental disclosure of cash flow information:

Interest paid

Income taxes paid

Year Ended December 31,

2012

2011

2010

$ 59,855

$ 63,898

$ 72,667

73,017

42,780

5,448

70,004

46,877

7,191

65,124

76,410

8,009

(23,500)

(22,045)

(10,000)

(12,503)

25,586

3,990

280

(7,826)

(2,853)

22,170

(6,246)

15,830

6,761

3,334

(602)

96

6,022

34,189

148

675

572

(51,524)

(11,846)

(253)

(17,644)

8,565

(26,090)

5,636

(1,682)

(1,751)

168,838

233,462

126,469

(132,029)

(100,534)

(248,505)

(54,085)

(50,597)

—

1,437

(3,076)

1,142

—

34,619

1,015

(184,677)

(153,065)

(212,871)

6,758

50,000

3,040

90,000

4,598

—

(40,000)

(10,000)

(35,000)

48,650

(115,835)

155,435

(48,007)

(46,690)

(44,652)

1,528

1,464

18,929

(78,021)

3,090

5,833

2,376

3,457

$

8,923

$

5,833

$

1,046

81,427

(4,975)

8,432

3,457

$ 43,061

$ 41,413

$ 41,037

2,979

1,756

22,600

See Notes to Consolidated Financial Statements

56

NORTHWEST NATURAL GAS COMPANY
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

1. ORGANIZATION AND PRINCIPLES OF 
CONSOLIDATION

The accompanying consolidated financial statements 
represent the consolidation of Northwest Natural Gas 
Company (NW Natural or the Company) and all companies 
that we directly or indirectly control, either through majority 
ownership or otherwise. Our direct and indirect wholly-
owned subsidiaries include NW Natural Energy, LLC (NWN 
Energy), NW Natural Gas Storage, LLC (NWN Gas 
Storage), Gill Ranch Storage, LLC (Gill Ranch), and NNG 
Financial Corporation (NNG Financial). Investments in 
corporate joint ventures and partnerships that we do not 
directly or indirectly control, and for which we are not the 
primary beneficiary, are accounted for under the equity 
method or the cost method, which includes NWN Energy’s 
investment in Palomar Gas Holdings, LLC (PGH) and NNG 
Financial's investment in KB Pipeline. NW Natural and its 
affiliated companies are collectively referred to herein as 
NW Natural. The consolidated financial statements are 
presented after elimination of all significant intercompany 
balances and transactions, except for amounts required to 
be included under regulatory accounting standards to reflect 
the effect of such regulation. In this report, the term “utility” 
is used to describe our regulated gas distribution business, 
and the term “non-utility” is used to describe our gas storage 
business and other non-utility investments and business 
activities.

Certain prior year balances in our consolidated financial 
statements and notes have been reclassified to conform 
with the current presentation. Specifically, the consolidated 
statement of comprehensive income has been reorganized, 
and cost of gas is now included in the section for total 
operating expenses. Net operating revenues, which was 
primarily used to show profit margins from the sale of gas, is 
no longer presented as a subtotal in the statement of 
comprehensive income. These changes, including the one 
noted above, had no impact on our prior year’s consolidated 
results of operations, financial condition or cash flows.

2. SIGNIFICANT ACCOUNTING POLICIES UPDATE

Use of Estimates 
The preparation of financial statements in conformity with 
generally accepted accounting principles in the United 
States of America (GAAP) requires management to make 
estimates and assumptions that affect reported amounts in 
the consolidated financial statements and accompanying 
notes. Actual amounts could differ from those estimates, and 
changes would most likely be reported in future periods. 
Management believes that the estimates and assumptions 
used are reasonable.  

57

Industry Regulation  
Our principal businesses are the distribution of natural gas, 
which is regulated by the Public Utility Commission of 
Oregon (OPUC) and Washington Utilities and Transportation 
Commission (WUTC), and natural gas storage services, 
which are regulated by either the Federal Energy Regulatory 
Commission (FERC) or the California Public Utilities 
Commission (CPUC), and to a certain extent by the OPUC. 
Accounting records and practices of our regulated 
businesses conform to the requirements and uniform system 
of accounts prescribed by these regulatory authorities in 
accordance with GAAP. Our businesses regulated by the 
OPUC, WUTC and FERC earn a reasonable return on 
invested capital from approved cost-based rates, while our 
business regulated by the CPUC earns a return to the extent 
we are able to charge competitive prices above our costs 
(i.e. market-based rates).

In applying regulatory accounting principles, we capitalize or 
defer certain costs and revenues as regulatory assets and 
liabilities pursuant to orders of the OPUC or WUTC, which 
provides for the recovery of revenues or expenses from, or 
refunds to, utility customers in future periods, including a 
return or a carrying charge in certain cases.

At December 31, 2012 and 2011 the amounts deferred as 
regulatory assets and liabilities were as follows:

In thousands

Current:

Regulatory Assets

2012

2011

Unrealized loss on derivatives(1)

$ 10,796

$ 57,317

Pension and other postretirement 
benefit liabilities(2)
Other(3)

Total current

Non-current:

Unrealized loss on derivatives(1)
Pension balancing(2)

Income tax asset

Pension and other postretirement 
benefit liabilities(2)
Environmental costs(4)
Other(3)

17,247

24,405

15,491

21,865

$ 52,448

$ 94,673

$

578

$

6,536

15,022

55,879

6,008

65,264

182,688

170,512

126,482

105,670

7,239

17,402

Total non-current

$ 387,888

$ 371,392

 
 
In thousands

Current:

Gas costs
Unrealized gain on derivatives(1)
Other(3)

Total current

Non-current:

Gas costs
Unrealized gain on derivatives(1)

Accrued asset removal costs
Other(3)

Regulatory Liabilities

2012

2011

$

9,100

$ 17,994

1,950

9,742

2,853

10,199

$ 20,792

$ 31,046

$

— $

8,420

3,639

—

281,213

267,355

3,261

2,607

Total non-current

$ 288,113

$ 278,382

(1)  Unrealized gains or losses on derivatives are non-cash items 

and therefore do not earn a rate of return or a carrying charge. 
These amounts are recoverable through utility rates as part of 
the annual Purchased Gas Adjustment (PGA) mechanism 
when realized at settlement.

(2)  Certain pension costs of the utility are approved for regulatory 
deferral, including amounts recorded to the pension balancing 
account, to mitigate the effects of higher and lower pension 
expenses. Pension costs that are deferred include an interest 
component when recognized in net periodic benefit costs or 
earn a rate of return or carrying charge. See Note 8.

(3)  Other primarily consists of several deferrals and amortizations 

under other approved regulatory mechanisms. The accounts 
being amortized typically earn a rate of return or carrying 
charge.

(4)  Environmental costs relate to specific sites approved for 
regulatory deferral. In Oregon we earn a rate of return on 
amounts paid, whereas amounts accrued but not yet paid do 
not earn a rate of return or a carrying charge until expended. 
Environmental costs related to Washington were deferred 
beginning in 2011, with cost recovery and a carrying charge to 
be determined in a future proceeding. In the 2012 rate case, 
the OPUC authorized a Site Remediation and Recovery 
Mechanism (SRRM) that allows the Company to recover 
prudently incurred environmental costs, subject to an earnings 
test that will be defined in a future rate proceeding.  

The amortization period for our regulatory assets and 
liabilities ranges from less than one year to an 
indeterminable period. Our regulatory deferrals for gas costs 
payable are generally amortized over 12 months beginning 
each November 1 following the gas contract year during 
which the deferred gas costs are realized. Similarly, most of 
our regulatory deferred accounts are amortized over 12 
months. However, certain regulatory account balances, such 
as income taxes, environmental costs, pension liabilities and 
accrued asset removal costs, are large and tend to be 
amortized over longer periods once we have agreed upon an 
amortization period with the respective regulatory agency.

We believe all cost incurred and deferred at December 31, 
2012 are prudent. We annually review all regulatory assets 
and liabilities for recoverability and more often if 
circumstances warrant. If we should determine that all or a 
portion of these regulatory assets or liabilities no longer meet 
the criteria for continued application of regulatory 
accounting, then we would be required to write off the net 
unrecoverable balances against earnings in the period such 
determination is made.

58

New Accounting Standards

Adopted Standards
FAIR VALUE MEASUREMENT. In May 2011, the Financial 
Accounting Standards Board (FASB) issued amendments to 
the authoritative guidance on fair value measurement. The 
amendments are primarily related to disclosure requirements 
for Level 3 fair value assets and were effective for periods 
beginning after December 15, 2011. The adoption of this 
standard did not have a material effect on our financial 
statement disclosures.

Recent Accounting Pronouncements
BALANCE SHEET OFFSETTING. In December 2011, the FASB 
issued authoritative guidance regarding the offsetting of 
assets and liabilities on the balance sheet. The standard is 
intended to provide more comparable guidance between the 
GAAP and international accounting standards by requiring 
entities to disclose both gross and net amounts for assets 
and liabilities offset on the balance sheet as well as other 
disclosures concerning their enforceable master netting 
arrangements. This guidance is effective for annual reporting 
periods beginning after January 1, 2013, and we do not 
expect this standard to have a material effect on our financial 
statement disclosures.

Plant, Property and Accrued Asset Removal Costs 
Plant and property are stated at cost, including capitalized 
labor, materials and overhead. In accordance with regulatory 
accounting standards, the cost of acquiring and constructing 
long-lived plant and property generally includes an 
allowance for funds used during construction (AFUDC) or 
capitalized interest. AFUDC represents the regulatory 
financing cost incurred when debt and equity funds are used 
for construction (see “Allowance for Funds Used During 
Construction” below). When constructed assets are subject 
to market-based rates rather than cost-based rates, the 
financing costs incurred during construction are included in 
capitalized interest in accordance with GAAP, not as 
regulatory financing costs under AFUDC. See Note 10.

In accordance with long-standing regulatory treatment, our 
depreciation rates are comprised of three components: one 
based on the average service life of the asset, a second 
based on the estimated salvage value of the asset, and a 
third based on the asset’s estimated cost of removal. We 
collect, through rates, the estimated cost of removal on 
certain regulated properties through depreciation expense, 
with a corresponding offset to accumulated depreciation. 
These removal costs are non-legal obligations as defined by 
regulatory accounting guidance. Therefore, we have 
included these costs as non-current regulatory liabilities 
rather than as accumulated depreciation on our consolidated 
balance sheets. In the rate setting process, the liability for 
removal costs is treated as a reduction to the net rate base 
upon which the regulated utility has the opportunity to earn 
its allowed rate of return.

Our provision for depreciation of utility plant and property is 
computed under the straight-line method in accordance with 
depreciation studies approved by regulatory authorities. The 
weighted average depreciation rate for utility assets in 
service was approximately 2.8% in 2012, 2011, and 2010, 

 
reflecting the approximate weighted average economic life of 
the property. This includes 2012 weighted average 
depreciation rates for the following asset categories: 2.7% 
for transmission and distribution plant, 2.2% for gas storage 
facilities, 4.7% for general plant, and 4.8% for intangible and 
other fixed assets.

Allowance for Funds Used During Construction 
Certain additions to utility plant include AFUDC, which 
represents the net cost of debt and equity funds used during 
construction. AFUDC is calculated using actual interest rates 
for debt and authorized rates for return on equity (ROE), if 
applicable. If short-term debt balances are less than the total 
balance of construction work in progress, then a composite 
AFUDC rate is used to represent interest on all debt funds, 
shown as a reduction to interest charges, and on ROE 
funds, shown as other income. While cash is not 
immediately recognized from recording AFUDC, it is realized 
in future years through rate recovery resulting from the 
higher utility cost of service. Our composite AFUDC rates 
were 0.3% in 2012, 0.5% in 2011, and 0.6% in 2010.

Cash and Cash Equivalents  
For purposes of reporting cash flows, cash and cash 
equivalents include cash on hand plus highly liquid 
investment accounts with maturity dates of three months or 
less. At December 31, 2012 and 2011, outstanding checks of 
approximately $2.3 million and $3.9 million, respectively, 
were included in accounts payable.

Revenue Recognition and Accrued Unbilled Revenue
Utility revenues, derived primarily from the sale and 
transportation of natural gas, are recognized upon delivery of 
gas commodity or service to customers. Revenues include 
accruals for gas delivered but not yet billed to customers 
based on estimates of deliveries from meter reading dates to 
month end (accrued unbilled revenue). Accrued unbilled 
revenue is dependent upon a number of factors that require 
management’s judgment, including total gas receipts and 
deliveries, customer use by billing cycle and weather factors. 
Accrued unbilled revenue is reversed the following month 
when actual billings occur. Our accrued unbilled revenue at 
December 31, 2012 and 2011 was $57.0 million and $61.9 
million, respectively.

From 2007 through 2010, utility margin also included the 
recognition of a regulatory adjustment for income taxes paid 
pursuant to a legislative rule (commonly referred to as SB 
408) in effect for certain gas and electric utilities in Oregon. 
Under SB 408, we were required to automatically implement 
a rate refund, or a rate surcharge, to utility customers on an 
annual basis. The refund or surcharge amount was based on 
the difference between income taxes paid and income taxes 
authorized to be collected in customer rates. We recorded 
the refund, or surcharge, each quarter based on estimates of 
the annual amount to be recognized. In 2011, SB 408 was 
repealed and replaced by Senate Bill 967. SB 967 required 
utilities to eliminate amounts accrued under SB 408 for the 
2010 and 2011 tax years, thereby denying recovery by NW 
Natural of the surcharge accrued for 2010, which resulted in 
a one-time pre-tax charge of $7.4 million in the second 
quarter of 2011. Pursuant to SB 967, we changed our 
revenue recognition policy effective January 1, 2011 and no 

longer recognize a regulatory adjustment for income taxes 
for SB 408.

Non-utility revenues are derived primarily from the gas 
storage business segment. At Mist, revenues are recognized 
upon delivery of services to customers. Revenues from our 
asset management partner are recognized over the life of 
the asset management contract for guaranteed amounts, if 
any, and are recognized as earned for amounts above the 
guaranteed amount. At Gill Ranch, firm storage services 
resulting from short-term and long-term contracts are 
typically recognized in revenue ratably over the term of the 
contract regardless of the actual storage capacity utilized. 
Asset management revenue is recognized using a straight-
line, pro rata methodology over the term of each contract 
and provides us with the majority of the pre-tax income from 
our independent energy marketing company. See Note 4.

Accounts Receivable and Allowance for Uncollectible 
Accounts 
Accounts receivable consist primarily of amounts due for 
natural gas sales and transportation services to utility 
customers, plus amounts due for gas storage services. With 
respect to these trade receivables, including accrued 
unbilled revenue, we establish an allowance for uncollectible 
accounts (allowance) based on the aging of receivables, 
collection experience of past due account balances including 
payment plans, and historical trends of write-offs as a 
percent of revenues. With respect to large individual 
customer receivables, a specific allowance is established 
and added to the general allowance when amounts are 
identified as unlikely to be partially or fully recovered. 
Inactive accounts are written-off against the allowance after 
they are 120 days past due or when deemed to be 
uncollectible. Differences between our estimated allowance 
and actual write-offs will occur based on a number of factors, 
including changes in economic conditions, customer credit 
worthiness and the level of natural gas prices. Each quarter 
the allowance for uncollectible accounts is adjusted, as 
necessary, based on information currently available.

Inventories  
Utility gas inventories, which consist of natural gas in storage 
for the utility, are stated at the lower of average cost or net 
realizable value. The regulatory treatment of utility gas 
inventories provides for cost recovery in customer rates. 
Utility gas inventories that are injected into storage are 
priced into inventory based on actual purchase costs. Utility 
gas inventories that are withdrawn from storage are charged 
to cost of gas during the current period at the weighted 
average inventory cost.

Gas storage inventories, which primarily represent 
inventories at the Gill Ranch storage facility, exclude cushion 
gas and consist of natural gas that we received as fuel-in-
kind from storage customers. Gas storage inventories are 
valued at the lower of average cost or net realizable value. 
Cushion gas is recorded at original cost and classified as 
long-term assets.

Material and supplies inventories, which consist of both utility 
and non-utility inventories, are stated at the lower of average 
cost or net realizable value.

59

  
 
 
 
Our utility and gas storage inventories totaled $58.8 million 
and $65.6 million at December 31, 2012 and 2011, 
respectively, and our materials and supplies inventories 
totaled $8.8 million at December 31, 2012 and 2011.

Gas Reserves
Our gas reserves are stated at cost, adjusted for regulatory 
amortization, with the associated deferred tax benefits 
recorded as liabilities on the balance sheet. Transactional 
costs to enter into the agreement and payments by NW 
Natural to acquire gas reserves are recognized as gas 
reserves on the balance sheet. The current portion is 
calculated based on expected gas deliveries within the next 
fiscal year. We recognize regulatory amortization of this 
asset on a volumetric basis and calculate using the 
estimated gas reserves and the therms extracted and sold 
each month. The amortization of gas reserves is recorded to 
cost of gas along with gas production revenues and 
production costs. See Note 11.

Derivatives  
In accordance with accounting for derivatives and hedges, 
we measure derivatives at fair value and recognize them as 
either assets or liabilities on the balance sheet. Accounting 
for derivatives requires that changes in the fair value be 
recognized currently in earnings unless specific hedge 
accounting criteria are met. Accounting for derivatives and 
hedges provides an exception for contracts intended for 
normal purchases and normal sales for which physical 
delivery is probable. In addition, certain derivative contracts 
are approved by regulatory authorities for recovery or refund 
through customer rates. Accordingly, the changes in fair 
value of these approved contracts are deferred as regulatory 
assets or liabilities pursuant to regulatory accounting 
principles. Derivative contracts entered into for utility 
customer requirements after the annual PGA rate has been 
set are subject to the PGA incentive sharing mechanism. 
Effective November 1, 2008, Oregon approved a PGA 
sharing mechanism under which we are required to select 
either an 80% deferral or 90% deferral of higher or lower gas 
costs such that the impact on current earnings from the gas 
cost sharing is either 20% or 10% of gas cost differences 
compared to PGA prices, respectively. For the PGA years in 
Oregon beginning November 1, 2012, 2011 and 2010, we 
selected a 90% deferral of gas cost differences. In 
Washington, 100% of our gas cost differences are deferred. 
See Note 13.

Our financial derivatives policy sets forth the guidelines for 
using selected derivative products to support prudent risk 
management strategies within designated parameters. Our 
objective for using derivatives is to decrease the volatility of 
gas prices, earnings, and cash flows and to prevent 
speculative risk. The use of derivatives is permitted only after 
the risk exposures have been identified, are determined to 
exceed acceptable tolerance levels and are necessary to 
support normal business activities. We do not enter into 
derivative instruments for trading purposes and we believe 
that any increase in market risk created by holding 
derivatives should be offset by the exposures they modify.

Fair Value  
In accordance with fair value accounting, we use the 
following fair value hierarchy for determining inputs for our 

60

debt, pension plan assets and our derivative fair value 
measurements:

• 

• 

• 

Level 1: Valuation is based upon quoted prices for 
identical instruments traded in active markets;
Level 2: Valuation is based upon quoted prices for 
similar instruments in active markets, quoted prices for 
identical or similar instruments in markets that are not 
active, and model-based valuation techniques for which 
all significant assumptions are observable in the market; 
and
Level 3: Valuation is generated from model-based 
techniques that use significant assumptions not 
observable in the market. These unobservable 
assumptions reflect our own estimates of assumptions 
that market participants would use in valuing the asset 
or liability.

When developing fair value measurements, it is our policy to 
use quoted market prices whenever available, or to 
maximize the use of observable inputs and minimize the use 
of unobservable inputs when quoted market prices are not 
available. Fair values are primarily developed using industry-
standard models that consider various inputs including: (a) 
quoted future prices for commodities; (b) forward currency 
prices; (c) time value; (d) volatility factors; (e) current market 
and contractual prices for underlying instruments; (f) market 
interest rates and yield curves; (g) credit spreads; (h) and 
other relevant economic measures.

Revenue Taxes 
Revenue-based taxes are primarily franchise taxes, which 
are collected from customers and remitted to taxing 
authorities. Revenue taxes are recorded gross and are 
included in operating revenues in the statement of 
comprehensive income.

Income Tax Expense  
NW Natural and its wholly-owned subsidiaries file 
consolidated federal, state, and local income tax returns. 
Current income taxes are allocated based on each entity’s 
respective taxable income or loss and tax credits as if each 
entity filed a separate return. We account for income taxes in 
accordance with accounting standards for income taxes. 
Accounting for income taxes requires recognition of deferred 
tax liabilities and assets for the future tax consequences of 
events that have been included in the consolidated financial 
statements or tax returns. Under this method, deferred tax 
liabilities and assets are determined based on the difference 
between the financial statement and tax basis of assets and 
liabilities using enacted tax rates in effect for the year in 
which the differences are expected to reverse. See Note 9.

Accounting for income taxes also requires recognition of 
deferred income tax assets and liabilities for temporary 
differences where regulators prohibit deferred income tax 
treatment for ratemaking purposes. We have recorded 
deferred tax liabilities of $60.3 million and $68.5 million at 
December 31, 2012 and 2011, respectively, to recognize 
future taxes payable resulting from transactions that have 
previously been reflected in the financial statements for 
these temporary differences. Regulatory assets or liabilities 
corresponding to such additional deferred income tax assets 
or liabilities may be recorded to the extent we believe they 

  
 
 
  
will be recoverable from or payable to customers through the 
ratemaking process. A corresponding regulatory asset has 
been recorded which represents the probable future revenue 
that will result from inclusion in rates charged to customers 
for taxes which will be paid in the future. The probable future 
revenue to be recorded takes into consideration the 
additional future taxes which will be generated by that 
revenue. Amounts applicable to income taxes due from 
customers primarily represent differences
between the book and tax basis of net utility plant in service 
and actual removal costs incurred.

Deferred investment tax credits on utility plant additions, 
which reduce income taxes payable, are deferred for 
financial statement purposes and amortized over the life of 
the related plant or lease.

Subsequent Events
We monitor significant events occurring after the balance 
sheet date and prior to the issuance of the financial 
statements to determine the impacts, if any, of events on the 
financial statements to be issued. We do not have any 
subsequent events to report.

3. EARNINGS PER SHARE

Basic earnings per share are computed using net income and the weighted average number of common shares outstanding for 
each period presented. Diluted earnings per share are computed in the same manner, except it uses the weighted average 
number of common shares outstanding plus the effects of the assumed exercise of stock options and the payment of estimated 
stock awards from other stock-based compensation plans that are outstanding at the end of each period presented. Diluted 
earnings per share are calculated as follows:

In thousands, except per share data

Net income

Average common shares outstanding - basic

Additional shares for stock-based compensation plans (See Note 6)

Average common shares outstanding - diluted

Earnings per share of common stock - basic

Earnings per share of common stock - diluted

Additional information:

2012

2011

2010

$

59,855

$

63,898

$

26,831

76

26,907

26,687

57

26,744

$

$

2.23

2.22

$

$

2.39

2.39

$

$

72,667

26,589

68

26,657

2.73

2.73

Antidilutive shares not included in net income per diluted common share calculation

1

2

1

4. SEGMENT INFORMATION

We operate in two primary reportable business segments, 
local gas distribution and gas storage. We also have other 
investments and business activities not specifically related 
to one of these two reporting segments, which we 
aggregate and report as “other.” We refer to our local gas 
distribution business as the “utility,” and our “gas storage” 
and “other” business segments as “non-utility.” Our gas 
storage segment includes NWN Gas Storage, which is a 
wholly-owned subsidiary of NWN Energy, Gill Ranch, which 
is a wholly-owned subsidiary of NWN Gas Storage, the 
non-utility portion of our Mist underground storage facility in 
Oregon (Mist) and third-party asset management services. 
Our “other” segment includes NNG Financial and our equity 
investment in PGH, which is pursuing development of the 
Palomar pipeline project (see Other, below).

Local Gas Distribution
Our local gas distribution segment is a regulated utility 
principally engaged in the purchase, sale and delivery of 
natural gas and related services to customers in Oregon 
and southwest Washington. As a regulated utility, we are 
responsible for building and maintaining a safe and reliable 
pipeline distribution system, purchasing sufficient gas 
supplies from producers and marketers, contracting for firm 
and interruptible transportation of gas over interstate 
pipelines to bring gas from the supply basins into our 
service territory, and re-selling the gas to customers subject 
to rates, terms and conditions approved by the OPUC or 
WUTC. Gas distribution also includes taking customer-
owned gas and transporting it from interstate pipeline 

connections, or city gates, to the customers’ end-use 
facilities for a fee, which is approved by the OPUC or 
WUTC. Approximately 90% of our customers are located in 
Oregon and 10% in Washington. On an annual basis, 
residential and commercial customers typically account for 
50% to 60% of our utility’s total volumes delivered and 80% 
to 90% of our utility’s margin. Industrial customers account 
for the remaining 40% to 50% of volumes and 5% to 15% of 
utility margin. The remaining 10% or less of utility margin is 
derived from miscellaneous services, gains or losses from 
an incentive gas cost sharing mechanism and other service 
fees.

Industrial customers we serve include: pulp, paper and 
other forest products; the manufacture of electronic, 
electrochemical and electrometallurgical products; the 
processing of farm and food products; the production of 
various mineral products; metal fabrication and casting; the 
production of machine tools, machinery and textiles; the 
manufacture of asphalt, concrete and rubber; printing and 
publishing; nurseries; government and educational 
institutions; and electric generation. No individual customer 
or industry group accounts for a significant portion of our 
utility revenues or utility margins.

Gas Storage
Our gas storage business segment includes natural gas 
storage services provided to customers primarily from two 
underground natural gas storage facilities, our Gill Ranch 
gas storage facility, which commenced commercial 
operation in October 2010, and the non-utility portion of our 
Mist gas storage facility. In addition to earning revenue from 

61

customer storage contracts, we also use an independent 
energy marketing company to provide asset management 
services for utility and non-utility capacity under contractual 
arrangement, the results of which are included in this 
business segment. For the years ended December 31, 
2012, 2011 and 2010, this business segment derived a 
majority of its revenues from asset management services 
and from firm and interruptible gas storage contracts.  

Mist Gas Storage Facility
Earnings from non-utility assets at the Mist facility are 
primarily related to firm storage capacity revenues. 
Earnings for the gas storage segment include revenues, net 
of amounts shared with core utility customers, from 
management of utility assets at Mist and upstream capacity 
when not needed to serve utility customers. In Oregon, the 
gas storage segment retains 80% of the pre-tax income 
from these services when the costs of the capacity have not 
been included in utility rates, or 33% of the pre-tax income 
when the costs have been included in utility rates. The 
remaining 20% and 67%, respectively, are credited to a 
deferred regulatory account for crediting back to utility 
customers. We have a similar sharing mechanism in 
Washington for revenue derived from storage and third 
party asset management services.

Gill Ranch Gas Storage Facility
Gill Ranch has a joint project agreement with Pacific 
Gas and Electric Company (PG&E) to own and operate the 
Gill Ranch underground natural gas storage facility near 
Fresno, California. Gill Ranch has a 75% undivided 

ownership interest in the facility and is also the operator of 
the facility, which offers storage services to the California 
market at market-based rates, subject to CPUC regulation 
including, but not limited to, service terms and conditions 
and tariff regulations.

Other
We have non-utility investments and other business 
activities which are aggregated and reported as a business 
segment called “other.” Although in aggregate these 
investments and activities are currently not material to 
consolidated operations, we identify and report them as a 
stand-alone segment based on our organizational structure 
and decision-making process because these business 
investments and activities are not specifically related to our 
utility or gas storage segments. This segment primarily 
consists of an equity method investment in a joint venture 
to build and operate an interstate gas transmission pipeline 
in Oregon (Palomar) and other pipeline assets in NNG 
Financial. For more information on Palomar, see Note 12. 
This segment also includes some operating and non-
operating revenues and expenses of the parent company 
that cannot be allocated to utility operations.

NNG Financial holds certain non-utility financial 
investments, but its assets primarily consist of an active, 
wholly-owned subsidiary which owns a 10% interest in an 
18-mile interstate natural gas pipeline. NNG Financial’s 
total assets were $1.1 million at both December 31, 2012 
and 2011.

62

 
Segment Information Summary
The following table presents summary financial information concerning the reportable segments. Inter-segment transactions are 
insignificant.

In thousands

2012

Utility

Gas Storage

Other

Total

Operating revenues

$

699,862

$

30,520

$

225

$

Depreciation and amortization

Income from operations

Net income

Capital expenditures

Total assets at December 31, 2012

2011

66,545

128,854

55,125

130,151

2,511,288

6,472

13,226

4,521

1,541

291,568

—

100

209

337

730,607

73,017

142,180

59,855

132,029

15,897

2,818,753

Operating revenues

$

801,478

$

26,354

$

223

$

Depreciation and amortization

Income from operations

Net income

Capital expenditures

63,843

135,722

60,527

94,049

6,161

9,090

4,101

6,485

—

33

(730)

—

828,055

70,004

144,845

63,898

100,534

Total assets at December 31, 2011

2,435,888

294,637

16,049

2,746,574

2010

Operating revenues

$

770,642

$

21,250

$

223

$

Depreciation and amortization

Income from operations

Net income

Capital expenditures

62,661

145,688

66,262

85,929

2,463

11,855

6,110

161,634

—

62

295

942

792,115

65,124

157,605

72,667

248,505

The following table presents additional summary information concerning utility margin. The gas storage and other segments 
emphasize operating revenues and net income growth as opposed to margin growth because these segments do not incur cost 
of sales expenses like the utility and, therefore, use revenues and net income to assess performance.

In thousands

Utility margin calculation:

Utility operating revenues

Less: Utility cost of gas

Utility margin

2012

2011

2010

$

$

699,862

$

801,478

$

355,335

458,508

344,527

$

342,970

$

770,642

424,494

346,148

63

5. COMMON STOCK

6. STOCK-BASED COMPENSATION

Common Stock
As of December 31, 2012 and 2011, our common shares 
authorized were 100,000,000. As of December 31, 2012, we 
had reserved for issuances 137,798 shares of common 
stock under the Employee Stock Purchase Plan (ESPP) and 
197,112 shares under our Dividend Reinvestment and 
Direct Stock Purchase Plan (DRPP). In the second quarter 
of 2012, our Restated Stock Option Plan (Restated SOP) 
was terminated for new stock option grants. There were 
529,925 options outstanding at December 31, 2012, which 
were granted prior to termination of the plan. These options 
will remain outstanding to the earlier of their forfeiture, 
exercise or expiration. 

Stock Repurchase Program
We have a share repurchase program under which we may 
purchase our common shares on the open market or 
through privately negotiated transactions. We currently have 
Board authorization through May 2013 to repurchase up to 
an aggregate of 2.8 million shares, but not to exceed $100 
million. No shares of common stock were repurchased 
pursuant to this program during the year ended December 
31, 2012. Since the plan’s inception in 2000 a total of 2.1 
million shares have been repurchased at a total cost of 
$83.3 million.

Summary of Changes in Common Stock
The following table shows the changes in the number of 
shares of our common stock issued and outstanding for the 
years 2012, 2011, and 2010:

In thousands

Balance, December 31, 2009

   Sales to employees under ESPP

   Exercise of stock options under Restated SOP, net

Balance, December 31, 2010

   Sales to employees under ESPP

   Exercise of stock options under Restated SOP, net

   Sales to shareholders under DRPP

Balance, December 31, 2011

   Sales to employees under ESPP

   Exercise of stock options under Restated SOP, net

   Sales to shareholders under DRPP

Balance, December 31, 2012

Shares

26,533

24

111

26,668

15

24

49

26,756

18

47

96

26,917

Our stock-based compensation plans include a Long-Term 
Incentive Plan (LTIP), an ESPP, and a Restated SOP. A 
variety of equity programs may be granted under the 
LTIP. The Restated SOP was terminated for new stock 
option grants in the second quarter of 2012. Together these 
plans are designed to promote stock ownership in NW 
Natural by employees and officers.  

Long-Term Incentive Plan
The LTIP is intended to provide a flexible, competitive 
compensation program for eligible officers and key 
employees. Under the amended LTIP, shares of common 
stock are authorized for equity incentive grants in the form 
of stock, restricted stock, restricted stock units, stock 
options, or performance shares. An aggregate of 600,000 
shares were authorized for issuance as of December 31, 
2011. An additional 250,000 shares were authorized for 
issuance as stock options in 2012. Shares awarded under 
the LTIP may be purchased on the open market or issued 
as new shares. 

Of the 850,000 shares authorized for any LTIP award at 
December 31, 2012, 311,571 shares of common stock were 
available for any type of award under the LTIP, assuming 
that market, performance, and service based grants 
currently outstanding are awarded at the target level. 
Additionally, the 250,000 shares of common stock added in 
2012 were available for option grants at December 31, 
2012. There were no outstanding grants of restricted stock 
or stock options under the LTIP at December 31, 2012 or 
2011. The LTIP stock awards are compensatory awards for 
which compensation expense is based on the fair value of 
stock awards, with expense being recognized over the 
performance and vesting period for the outstanding awards.

Performance Shares
Since the LTIP’s inception in 2001, performance shares 
which incorporate market, performance, and service-based 
factors, have been granted annually based on three-year 
performance periods. At December 31, 2012, certain 
performance share measures had been achieved for the 
2010-12 award period. Accordingly, participants are 
estimated to receive 9,022 shares of common stock and a 
dividend equivalent cash payment equal to the number of 
shares of common stock received on the award payout 
multiplied by the aggregate cash dividends paid per share 
during the performance period. At December 31, 2011 and 
2010, we awarded 8,428 and 8,007 shares of common 
stock, respectively, for the 2009-11 and 2008-10 award 
periods, plus a dividend equivalent cash payment equal to 
the number of shares of common stock received on the 
award payout multiplied by the aggregate cash dividends 
paid per share during the performance period. In 2011 and 
2010, we expensed $0.4 million and $0.2 million, 
respectively, for both the 2009-11 and 2008-10 performance 
share award periods, and on a cumulative basis we accrued 
a total of $0.8 million and $0.7 million, respectively, related 
to the 2009-11 and 2008-10 performance periods.

64

At December 31, 2012, the aggregate number of performance shares granted and outstanding at the target and maximum levels 
were as follows:

Performance Period

Target

Maximum

Performance Shares Awards Outstanding

2012

Expense

Cumulative Expense

At Dec. 31, 2012

2010-12

2011-13

2012-14

Total

$

$

41,500

$

83,000

$

452

$

37,950

35,340

75,900

70,680

114,790

$

229,580

$

294

635

1,381

1,170

570

635

The fair value of each stock option is estimated on the grant 
date using the Black-Scholes option pricing model with the 
following weighted average assumptions and outcomes:

Risk-free interest rate

Expected life (in years)

2011

2010

2.0%

4.5

2.3%

4.7

Expected market price volatility factor

24.5%

23.2%

Expected dividend yield

Forfeiture rate

3.8%

3.1%

3.8%

3.2%

Weighted average grant date fair value

$ 6.73

$ 6.36

The expected life of our grants was calculated based on our 
actual experience with previously exercised option grants.  
The risk-free interest rate was based on the implied yield 
currently available on U.S. Treasury zero-coupon issues 
with a life equal to the expected life of the options. Historical 
data was used to estimate the volatility factor, measured on 
a daily basis, for a period equal to the duration of the 
expected life of the option awards. The dividend yield was 
based on management’s current estimate for future dividend 
payouts at the time of grant. We expense the total cost of 
stock option awards granted to retirement eligible 
employees at the date of grant in accordance with stock 
option accounting guidance and the retirement vesting 
provisions of our option agreements.

For each of these performance periods, awards will be 
based on total shareholder return relative to a peer group of 
gas distribution companies over the three-year performance 
period and on performance results achieved relative to 
specific core and non-core strategies. Compensation 
expense is recognized in accordance with the accounting 
standard for stock compensation based on performance 
levels achieved and an estimated fair value using a Black-
Scholes or binomial model. The weighted-average grant 
date fair value of unvested shares at December 31, 2012 
and 2011 was $51.42 and $25.06 per share, 
respectively. The weighted-average grant date fair value of 
shares vested during the year was $45.05 per share and for 
shares granted during the year was $22.35 per share.  

Restricted Stock Units
In 2012, the Company began granting RSUs under the LTIP 
instead of stock options under the Restated SOP. RSUs 
include a performance based threshold and a vesting period 
of four years from the grant date. An RSU obligates the 
Company upon vesting to issue the RSU holder one share 
of common stock plus a cash payment equal to the total 
amount of dividends paid per share between the grant date 
and vesting date of the RSU. During the year ended 
December 31, 2012, the Company granted 25,224 RSUs 
under the LTIP with grant date fair values ranging from 
$44.43 to $48.25 per share.   

Restated Stock Option Plan
The Restated SOP was terminated for new option grants in 
2012; however, options that had been granted before the 
Restated SOP was terminated will remain outstanding until 
the earlier of their expiration, forfeiture or exercise. Any new 
grants of stock options would be made under the LTIP. No 
new stock options were granted during 2012. 

At December 31, 2012, a total of 529,925 shares of 
common stock remained reserved for issuance under the 
Restated SOP with none available for grant. Options under 
the Restated SOP were granted only to officers and key 
employees designated by a committee of our Board of 
Directors. All options were granted at an option price equal 
to the closing market price on the date of grant and may be 
exercised for a period up to 10 years and 7 days from the 
date of grant. Option holders may exchange shares they 
have owned for at least six months, valued at the current 
market price, to purchase shares at the option price.

65

 
Information regarding the Restated SOP activity for the 
three years ended December 31, 2012 is summarized as 
follows:

7. DEBT

Weighted -
Average
Price Per 
Share

Intrinsic
Value
(In millions)

Option
Shares

Balance outstanding,
Dec. 31, 2009

484,935

$

39.57

$

Granted

Exercised

Forfeited

Balance outstanding,
Dec. 31, 2010

Granted

Exercised

Forfeited

Balance outstanding,
Dec. 31, 2011
Exercised

Forfeited

Balance outstanding, 
Dec. 31, 2012

Exercisable, 
Dec. 31, 2012

119,750

(111,525)

(2,700)

490,460

122,700

(24,185)

(9,750)

579,225

(46,825)

(2,475)

44.25

39.01

43.00

40.82

45.74

33.88

44.38

42.09

40.62

43.78

529,925

42.22

366,887

41.16

2.7

n/a

0.9

n/a

2.8

n/a

0.3

n/a

3.4

0.4

n/a

1.3

1.2

In the year ended December 31, 2012, cash of $0.7 million 
was received for option shares exercised and $0.1 million 
related tax benefit was realized. For the years ended 
December 31, 2012, 2011, and 2010, the total fair value of 
options that vested was $0.6 million, $0.6 million and $0.5 
million, respectively. The weighted average remaining life of 
options exercisable and outstanding at December 31, 2012 
was 5.1 years and 5.8 years, respectively. As of December 
31, 2012, there was $0.5 million of unrecognized 
compensation cost related to the unvested portion of 
outstanding stock option awards expected to be recognized 
over a period extending through 2014.

Employee Stock Purchase Plan
The ESPP allows employees to purchase common stock at 
85% of the closing price on the trading day immediately 
preceding the initial offering date, which is set 
annually. Each eligible employee may purchase up to 
$21,244 worth of stock through payroll deductions over a 
12-month period, with shares issued at the end of the 12-
month subscription period.

Stock-based compensation expense is recognized as 
operations and maintenance expense or is capitalized as 
part of construction overhead. The following table 
summarizes the financial statement impact of stock-based 
compensation under our LTIP, Restated SOP and ESPP:

In thousands

2012

2011

2010

Operations and maintenance
expense, for stock-based
compensation
Income tax benefit

$ 1,668 $ 1,477 $ 1,032

(707)

(597)

(418)

Net stock-based compensation
effect on net income

Amounts capitalized for stock-based
compensation

$

$

961 $

880 $

614

294 $

261 $

182

66

Short-Term Debt
Our primary source of short-term funds is from the sale of 
commercial paper and bank loans. In addition to issuing 
commercial paper or bank loans to meet seasonal working 
capital requirements, short-term debt is used temporarily to 
fund capital requirements. Commercial paper and bank 
loans are periodically refinanced through the sale of long-
term debt or equity securities. Our commercial paper 
program is supported by one or more committed credit
facilities. At December 31, 2012 and 2011, the amounts of 
commercial paper debt outstanding were $190.3 million and 
$141.6 million, respectively, and the average interest rate 
was 0.3% at year end for both periods. The carrying cost of 
our commercial paper approximates fair value using Level 2 
inputs, due to the short-term nature of the notes. See Note 2 
for a description of the fair value hierarchy. At December 31, 
2012, our commercial paper had a maximum maturity of 254 
days and an average maturity of 84 days. There were no 
bank loans outstanding at December 31, 2012 or 2011.

On December 20, 2012, NW Natural entered into a five year 
$300 million credit agreement. The agreement has a 
maturity date of December 20, 2017, pursuant to which we 
may extend commitments for two additional one-year 
periods subject to lender approval. The credit agreement 
allows us to request increases in the total commitment 
amount up to a maximum amount of $450 million and 
permits letters of credit in an aggregate amount of up to 
$200 million. Any principal and unpaid interest owed on 
borrowings under the agreement are due and payable on or 
before the expiration date. NW Natural's prior $250 million 
agreement, dated May 31, 2007, was terminated upon the 
closing of this new credit agreement. There were no 
outstanding balances under the agreement and no letters of 
credit issued or outstanding at December 31, 2012 and 
2011. 

The credit agreement requires that we maintain credit 
ratings with Standard & Poor’s (S&P) and Moody’s Investors 
Service, Inc. (Moody’s) and notify the lenders of any change 
in our senior unsecured debt ratings or senior secured debt 
ratings, as applicable, by such rating agencies. A change in 
our debt ratings is not an event of default, nor is the 
maintenance of a specific minimum level of debt rating a 
condition of drawing upon the credit facility. However, 
interest rates on any loans outstanding under the credit 
facility are tied to debt ratings, which would increase or 
decrease the cost of any loans under the credit facility when 
ratings are changed.

The credit agreement also requires us to maintain a 
consolidated indebtedness to total capitalization ratio of 
70% or less. Failure to comply with this covenant would 
entitle the lenders to terminate their lending commitments 
and accelerate the maturity of all amounts outstanding. We 
were in compliance with this covenant at December 31, 
2012 and 2011.

 
 
First Mortgage Bonds
NW Natural issued $50 million of FMBs in October 2012 
with a coupon rate of 4.00% and a maturity date of 
October 31, 2042. In September 2011, the utility issued $50 
million of FMBs due September 15, 2021. 

Subsidiary Senior Secured Debt
In November 2011, Gill Ranch issued $40 million of senior 
secured debt, which consists of $20 million of fixed rate debt 
with an interest rate of 7.75% and $20 million of variable 
interest rate debt with an interest rate of LIBOR plus 5.50%, 
or 7.00%, whichever is higher. At December 31, 2012, the 
variable interest rate was 7.00%. This debt is secured by all 
of the membership interests in Gill Ranch and is 
nonrecourse to NW Natural. The maturity date of this debt is 
November 30, 2016.

Under the debt agreements, Gill Ranch is subject to certain 
covenants and restrictions including, but not limited to, a 
financial covenant that requires Gill Ranch to maintain 
minimum adjusted earnings before interest, taxes, 
depreciation and amortization (EBITDA) at various levels 
over the term of the debt. The minimum adjusted EBITDA 
increases incrementally over the first few years, reaching its 
highest level in the 12-month period beginning April 1, 2015. 
Under the debt agreements, Gill Ranch is also subject to a 
debt service reserve requirement of 10% of the outstanding 
principal amount, initially $4 million, certain prepayment 
penalties, restrictions on dividends out of Gill Ranch unless 
certain earnings ratios are met, and restrictions on
incurrence of additional debt. Gill Ranch was in compliance 
with all existing debt provisions and covenants for the year 
ended December 31, 2012.

Fair Value of Long-Term Debt
As our outstanding debt does not trade in active markets, 
we estimated the fair value of our outstanding long-term 
debt using outstanding debt issuances that actively trade in 
public markets and companies that have similar credit 
ratings, terms and remaining maturities to our debt. These 
valuations are based on Level 2 inputs as defined in the fair 
value hierarchy. See Note 2. 

The following table provides an estimate of the fair value of 
our long-term debt, including current maturities of long-term 
debt, using market prices in effect on the valuation date: 

In thousands

Carrying amount

Estimated fair value

December 31,

2012

2011

$

$

691,700

$

834,664

681,700

808,724

Long-Term Debt
The issuance of first mortgage bonds (FMBs), which 
includes our medium-term notes, under the Mortgage and 
Deed of Trust (Mortgage) is limited by eligible property, 
adjusted net earnings and other provisions of the Mortgage. 
The Mortgage constitutes a first mortgage lien on 
substantially all of our utility property. In addition, our Gill 
Ranch subsidiary senior secured debt is secured by all of 
the membership interests in Gill Ranch as well as Gill 
Ranch’s debt service reserve account.

Retirement of long-term debt for each of the 12-month 
periods through December 31, 2017 amount to: none in 
2013; $60 million in 2014; $40 million in 2015; $65 million in 
2016; and $40 million in 2017.

The following table presents our debt outstanding as of 
December 31, 2012, 2011, and 2010:

In thousands

First Mortgage Bonds

2012

2011

6.665% Series B due 2011

$

— $

—

7.13 % Series B due 2012

8.26 % Series B due 2014

3.95 % Series B due 2014

4.70 % Series B due 2015

5.15 % Series B due 2016

7.00 % Series B due 2017

6.60 % Series B due 2018

8.31 % Series B due 2019

7.63 % Series B due 2019

5.37 % Series B due 2020

9.05 % Series A due 2021

3.176 % Series B due 2021

5.62 % Series B due 2023

7.72 % Series B due 2025

6.52 % Series B due 2025

7.05 % Series B due 2026

7.00 % Series B due 2027

6.65 % Series B due 2027

6.65 % Series B due 2028

7.74 % Series B due 2030

7.85 % Series B due 2030

5.82 % Series B due 2032

5.66 % Series B due 2033

5.25 % Series B due 2035

4.00 % Series due 2042

—

10,000

50,000

40,000

25,000

40,000

22,000

10,000

20,000

75,000

10,000

50,000

40,000

20,000

10,000

20,000

20,000

19,700

10,000

20,000

10,000

30,000

40,000

10,000

50,000

40,000

10,000

50,000

40,000

25,000

40,000

22,000

10,000

20,000

75,000

10,000

50,000

40,000

20,000

10,000

20,000

20,000

19,700

10,000

20,000

10,000

30,000

40,000

10,000

—

Subsidiary Senior Secured Debt

Gill Ranch debt due 2016

Less: Current maturities of long-term 
debt

651,700

641,700

40,000

40,000

691,700

681,700

—

40,000

Total long-term debt

$ 691,700

$ 641,700

67

  
 
 
 
 
 
 
8. PENSION AND OTHER POSTRETIREMENT BENEFIT COSTS

We maintain qualified non-contributory defined benefit pension plans covering a majority of our utility employees with more than 
one year of service, a few non-qualified supplemental pension plans for eligible executive officers and other key employees, and 
other postretirement employee benefit plans. We also have qualified defined contribution plans (Retirement K Savings Plan) for 
all eligible employees. Only the qualified defined benefit pension plan and Retirement K Savings Plan have plan assets, which 
are held in qualified trusts to fund retirement benefits. Effective December 31, 2012, the defined benefit pension plans for non-
union and union employees were merged. We will begin to refer to these plans as one plan in future filings. The qualified defined 
benefit retirement plan for non-union and union employees was closed to new participants effective January 1, 2007. The 
postretirement benefits plan for non-union employees was closed to new participants effective January 1, 2010. These plans 
were not available to employees of our non-utility subsidiaries. Non-union and union employees hired or re-hired after December 
31, 2006 and 2009, respectively, and employees of NW Natural subsidiaries are provided an enhanced Retirement K Savings 
Plan benefit.

The following table provides a reconciliation of the changes in benefit obligations and fair value of plan assets, as applicable, for 
the pension and other postretirement benefit plans, excluding the Retirement K Savings Plan, for the years ended December 31, 
2012 and 2011, and a summary of the funded status and amounts recognized in the consolidated balance sheets using 
measurement dates as of December 31, 2012 and 2011:

In thousands

Reconciliation of change in benefit obligation:

Obligation at January 1

Service cost

Interest cost

Net actuarial (gain) or loss

Benefits paid

Obligation at December 31

Reconciliation of change in plan assets:

Fair value of plan assets at January 1

Actual return on plan assets

Employer contributions

Benefits paid

Fair value of plan assets at December 31

Funded status at December 31

Postretirement Benefit Plans

Pension Benefits

Other Benefits

2012

2011

2012

2011

$

391,127

$

339,338

$

30,049

$

27,676

8,047

17,295

37,615

7,122

18,134

44,802

592

1,267

3,182

614

1,404

2,225

(18,195)

(18,269)

(1,971)

(1,870)

$

435,889

$

391,127

$

33,119

$

30,049

$

215,970

$

219,014

$

26,683

25,145

(18,195)

(6,684)

21,909

(18,269)

— $

—

1,971

(1,971)

249,603

$

215,970

$

— $

—

—

1,870

(1,870)

—

(186,286) $

(175,157) $

(33,119) $

(30,049)

$

$

Our qualified defined benefit pension plan has an aggregate benefit obligation of $404.0 million and $362.9 million at December 
31, 2012 and 2011, respectively, and fair values of plan assets of $249.6 million and $216.0 million, respectively. 

The following table presents amounts recognized in regulatory assets or in the statement of comprehensive income for the years 
ended December 31, 2012, 2011 and 2010:

In thousands

Net actuarial loss

Amortization of:

Transition obligation

Prior service cost

Actuarial loss

Regulatory Assets

Other Comprehensive Income

Pension Benefits

Other Postretirement Benefits

Pension Benefits

2012

2011

2010

2012

2011

2010

2012

2011

2010

$ 26,504

$ 66,404

$ 17,115

$ 3,182

$

2,225

$

2,387

$ 3,511

$

2,948

$

1,716

—

(230)

—

(230)

—

(230)

(14,482)

(10,731)

(6,740)

(411)

(197)

(435)

(411)

(197)

(289)

(411)

(197)

(131)

—

35

(1,150)

—

(122)

(854)

—

43

(707)

Total

$ 11,792

$ 55,443

$ 10,145

$ 2,139

$

1,328

$

1,648

$ 2,396

$

1,972

$

1,052

68

The following table presents amounts recognized in regulatory assets and accumulated other comprehensive income (AOCI) at 
December 31, 2012 and 2011:

In thousands

2012

2011

2012

2011

2012

2011

Regulatory Assets

AOCI

Pension Benefits

Other Postretirement Benefits

Pension Benefits

Net transition obligation

$

— $

— $

— $

411

$

1,097

188,278

1,328

176,255

882

9,681

1,079

6,934

$

189,375

$

177,583

$

10,563

$

8,424

$

15,315

$

— $

(12)

15,327

—

(48)

12,966

12,918

Prior service cost

Net actuarial loss

Total

The following is our pension plan asset target allocation at 
December 31, 2012:

Asset Category

U.S. large cap equity

U.S. small/mid cap equity

Non-U.S. equity

Emerging markets equity

Long government/credit

High yield

Emerging market debt

Real estate funds

Absolute return strategy

Real return strategy

 Target Allocation

13.0%

8.5%

13.0%

3.5%

30.0%

5.0%

5.0%

6.0%

11.0%

5.0%

Our non-qualified supplemental defined benefit plan 
obligations were $31.9 million and $28.2 million at 
December 31, 2012 and 2011, respectively. These plans are 
not subject to regulatory deferral, and the changes in 
actuarial gains and losses, prior service costs and transition 
assets or obligations are recognized in AOCI under common 
stock equity, net of tax, until they are amortized as a 
component of net periodic benefit cost. Although these are 
unfunded plans with no plan assets due to their nature as 
non-qualified plans, we indirectly fund a portion of our 
obligations with company- and trust-owned life insurance.

Our plans for providing postretirement benefits, other than 
pensions, also are unfunded plans but are subject to 
regulatory deferral. The actuarial gains and losses, prior 
service costs and transition assets or obligations for these 
plans were recognized as a regulatory asset. 
Net periodic benefit costs consist of service costs, interest 
costs, the amortization of actuarial gains and losses, the 
expected returns on plan assets and, in part, on a market-
related valuation of assets. The market-related valuation 
reflects differences between expected returns and actual 
investment returns, of which the differences are recognized 
over a three-year period or less from the year in which they 
occur, thereby reducing year-to-year net periodic benefit 
cost volatility.

In 2013, an estimated $17.2 million will be amortized from 
regulatory assets to net periodic benefit costs, consisting of 
$16.8 million of actuarial losses, and $0.4 million of prior 
service costs. A total of $1.3 million will be amortized from 
AOCI to earnings related to actuarial losses.

Our assumed discount rate was determined independently 
for each pension plan and other postretirement benefit plan 
based on the Citigroup Above Median Curve (discount rate 
curve), which uses high quality corporate bonds rated AA- 
or higher by S&P or Aa3 or higher by Moody’s. The discount 
rate curve was applied to match the estimated cash flows in 
each of the Company's plans to reflect the timing and 
amount of expected future benefit payments for these plans.

Our assumed expected long-term rate of return on plan 
assets was developed using a weighted average of the 
expected returns for the target asset portfolio. In developing 
the expected long-term rate of return assumption, 
consideration was given to the historical performance of 
each asset class in which the plans’ assets are invested and 
the target asset allocation for plan assets.

Our investment strategy and policies for qualified pension 
plan assets held in the Retirement Trust Fund were 
approved by our retirement committee, which is composed 
of senior management employees with the assistance of an 
outside investment consultant. The policies set forth the 
guidelines and objectives governing the investment of plan 
assets. Plan assets are invested for total return with 
appropriate consideration for liquidity, portfolio risk, and 
return expectation. All investments are expected to satisfy 
the requirements of the rule of prudent investments as set 
forth under the Employee Retirement Income Security Act of 
1974. The approved asset classes include cash and short-
term investments, fixed income, common stock and 
convertible securities, absolute and real return strategies, 
real estate and investments in our common stock. Plan 
assets may be invested in separately managed accounts or 
in commingled or mutual funds. Investment re-balancing 
takes place periodically as needed, or when significant cash 
flows occur, in order to maintain the allocation of assets 
within the stated target ranges. Our expected long-term rate 
of return is based upon historical index returns by asset 
class, adjusted by a factor based on our historical return 
experience, diversified asset allocation and active portfolio 
management by professional investment managers. The 
Retirement Trust Fund is not currently invested in any NW 
Natural securities.

69

 
 
 
  
The following tables provide the components of net periodic benefit cost for the Company's pension and other postretirement 
benefit plans for the years ended December 31, 2012, 2011, and 2010 and the assumptions used in measuring these costs and 
benefit obligations:

In thousands

Service cost

Interest cost

Expected return on plan assets

Amortization of transition obligations

Amortization of prior service costs

Amortization of net actuarial loss

Net periodic benefit cost

Amount allocated to construction
Amount deferred to regulatory balancing account(1)

Pension Benefits

Other Postretirement Benefits

2012

2011

2010

2012

2011

2010

$

8,047

$

7,122

$

6,688

$

592

$

614

$

17,295

(19,082)

—

195

15,631

22,086

(5,820)

(7,876)

18,134

18,029

1,267

1,404

(17,867)

(18,207)

—

352

11,584

19,325

(4,905)

(6,008)

—

187

7,447

14,144

(3,729)

—

—

411

197

435

2,902

(882)

—

—

411

197

289

2,915

(878)

—

588

1,436

—

411

197

131

2,763

(904)

—

Net amount charged to expense

$

8,390

$

8,412

$

10,415

$

2,020

$

2,037

$

1,859

(1) Effective January 1, 2011, the OPUC approved the deferral of certain pension expenses above or below the amount set in rates, with recovery 
of these deferred amounts through the implementation of a balancing account, which includes the expectation of lower net periodic benefit costs 
in future years. Deferred pension expense balances include accrued interest at the utility’s authorized rate of return. See Note 2.

Net periodic benefit costs above are reduced by amounts capitalized to utility plant based on approximately 30% to 40% payroll 
overhead charge to construction work orders. In addition, a certain amount of net periodic benefit costs are recorded to the 
regulatory balancing account for pensions, with the remaining net amount charged to expense and recognized in current 
earnings.

Pension Benefits

Other Postretirement Benefits

2012

2011

2010

2012

2011

2010

Assumptions for net periodic benefit cost:

Weighted-average discount rate

4.51%

5.49%

6.01%

4.33%

5.16%

5.78%

Rate of increase in compensation

3.25-5.0%

3.25-5.0%

3.25-5.0%

Expected long-term rate of return

8.00%

8.25%

8.25%

n/a

n/a

n/a

n/a

n/a

n/a

Assumptions for year-end funded status:

Weighted-average discount rate

3.85%

4.51%

5.49%

3.56%

4.33%

5.16%

Rate of increase in compensation

3.25-5.0%

3.25-5.0%

3.25-5.0%

Expected long-term rate of return

7.50%

8.00%

8.25%

n/a

n/a

n/a

n/a

n/a

n/a

The impact of a change in retirement benefit costs on 
operating results would be less than the amounts shown 
above because 30% to 40% of these amounts would be 
capitalized to utility plant as payroll overhead charges to 
construction work orders, and a certain amount of increases 
or decreases would be recorded to the regulatory balancing 
account for pensions, with the remaining amount recognized 
in current earnings.

The assumed annual increase in health care cost trend 
rates used in measuring other postretirement benefits as of 
December 31, 2012 were 8.5% for medical and 10.5% for 
prescription drugs. Medical costs and prescription drugs are 
assumed to decrease gradually each year to a rate of 5.0% 
by 2023.

Assumed health care cost trend rates can have a significant 
effect on the amounts reported for the health care plans. A 
one percentage point change in assumed health care cost 
trend rates would have the following effects:

In thousands

1% Increase

1% Decrease

Effect on net periodic
postretirement health care
benefit cost

Effect on the accumulated
postretirement benefit obligation

$

65

$

(58)

943

(841)

70

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
The following table provides information regarding employer 
contributions and benefit payments for the two qualified 
pension plans, non-qualified pension plans and other 
postretirement benefit plans for the years ended December 
31, 2012 and 2011, and estimated future contributions and 
payments:

In thousands

Pension Benefits

Other Benefits

Employer Contributions:

2011

2012

2013 (estimated)

Benefit Payments:

2010

2011

2012

Estimated Future 
Benefit Payments:

2013

2014

2015

2016

2017

$

22,325

$

25,559

13,803

18,645

18,269

18,195

19,732

20,244

20,788

21,490

22,245

1,870

1,971

2,004

1,476

1,870

1,971

2,004

2,080

2,108

2,169

2,213

2018-2022

128,609

11,514

Employer Contributions to Company-Sponsored 
Defined Benefit Pension Plans
We make contributions to our qualified defined benefit 
pension plans based on actuarial assumptions and 
estimates, tax regulations and funding requirements under 
federal law. The Pension Protection Act of 2006 (the Act) 
established new funding requirements for defined benefit 
plans. The Act establishes a 100% funding target over 
seven years for plan years beginning after December 31, 
2008. In addition, in July 2012 the Moving Ahead for 
Progress in the 21st Century Act (MAP-21). This legislation 
changes several provisions affecting pension plans, 
including temporary funding relief and Pension Benefit 
Guaranty Corporation (PBGC) premium increases, which 
reduces the level of minimum required contributions in the 
near-term but generally increases contributions in the long-
run as well as increasing the operational costs of running a 
pension plan. Our qualified defined benefit pension plans 
are currently underfunded by $154.4 million at December 
31, 2012.  Including the impacts of MAP-21, we expect to 
make contributions during 2013 of up to $15 million.

Multiemployer Pension Plan
In addition to the Company-sponsored defined benefit plans 
referred to above, we contribute to a multiemployer pension 
plan for our utility's union employees known as the Western 
States Office and Professional Employees International 
Union Pension Fund (Western States Plan) in accordance 
with our collective bargaining agreement. The employer 
identification number of the plan is 94-6076144. The cost of 
this plan, and corresponding future liabilities, are in addition 
to pension amounts in the tables above. The Western 
States Plan is managed by a board of trustees that includes 
equal representation from participating employers and labor 
unions. Contribution rates are established by collective 
bargaining agreements, and benefit levels are set by the 

71

board of trustees based on the advice of an independent 
actuary regarding the level of benefits that agreed-upon 
contributions are expected to support. 

The Western States Plan has reported an accumulated 
funding deficit for the current plan year and remains in 
critical status. A plan is considered to be in critical status if 
its funded status is below 65%. Federal law requires 
pension plans in critical status to adopt a rehabilitation plan 
designed to restore the financial health of the plan. 
Rehabilitation plans may specify benefit reductions, 
contribution surcharges, or a combination of the two. The 
Western States Plan trustees adopted a rehabilitation plan 
that reduced benefit accrual rates and adjustable benefits 
for active employee participants and increased future 
employer contribution rates. These changes are expected to 
improve the funded status of the plan. Our contributions to 
the Western States Plan amounted to $0.4 million in 2012, 
2011, and 2010 which is approximately 5% of the total 
contributions to the plan by all employer participants.

Under the terms of our current collective bargaining 
agreement, which became effective in July 2009, we can 
withdraw from the Western States Plan at any time. 
However, if the plan is underfunded at the time we withdraw, 
we would be assessed a withdrawal liability. In accordance 
with accounting rules for multiemployer plans, we have not 
recognized these potential withdrawal liabilities on the 
balance sheet. Currently, we have no intent to withdraw 
from the plan, so we have not recorded a withdrawal liability.

Defined Contribution Plan
The Retirement K Savings Plan provided to our employees 
is a qualified defined contribution plan under Internal 
Revenue Code Section 401(k). Employer contributions to 
this plan totaled $2.2 million in 2012, $2.4 million in 2011, 
and $2.1 million in 2010. The Retirement K Savings Plan 
includes an Employee Stock Ownership Plan. 

Deferred Compensation Plans
The supplemental deferred compensation plans for eligible 
officers and senior managers are non-qualified plans. These 
plans are designed to enhance the retirement savings of 
employees and to assist them in strengthening their 
financial security by providing an incentive to save and 
invest regularly.  

Fair Value
Following is a description of the valuation methodologies 
used for assets measured at fair value. In cases where the 
pension plan is invested through a collective trust fund or 
mutual fund, our custodian uses the fund's market value. 
The custodian also provides the market values for 
investments directly owned.

U.S. LARGE CAP EQUITY and U.S. SMALL/MID CAP 
EQUITY. These are level 1 and 2 assets. The level 1 assets 
consist of directly held stocks, and mutual funds with a 
published net asset value (NAV). The level 2 assets consist 
of a mutual fund where NAV is not publicly published but the 
investment can be readily disposed of at NAV or market 
value. Directly held stocks are valued at the closing price 
reported in the active market on which the individual 
security is traded, and mutual funds are valued at NAV. This 

 
 
 
 
 
  
REAL RETURN STRATEGY. These are level 1 assets 
representing a mutual fund with a published NAV. This 
mutual fund is valued at NAV. This asset class includes an 
investment in a broad range of assets and strategies 
primarily including fixed income and equity securities, along 
with commodities.

CASH AND CASH EQUIVALENTS. These are level 2 assets 
representing mutual funds without published NAV's but the 
investment can be readily disposed of at NAV.  The mutual 
funds are valued at the net asset value of the shares held 
by the plan at the valuation date. This asset class primarily 
includes money market mutual funds.

The preceding valuation methods may produce a fair value 
calculation that is not indicative of net realizable value or 
reflective of future fair values. Although we believe these 
valuation methods are appropriate and consistent with other 
market participants, the use of different methodologies or 
assumptions to determine the fair value of certain financial 
instruments could result in a different fair value 
measurement at the reporting date.

Investment securities are exposed to various financial risks 
including interest rate, market and credit risks. Due to the 
level of risk associated with certain investment securities, it 
is reasonably possible that changes in the values of our 
investment securities will occur in the near term and that 
such changes could materially affect our investment 
account balances and the amounts reported as plan assets 
available for benefits payments.

asset class includes investments primarily in U.S. common 
stocks.

NON-U.S. EQUITY. These are level 1 and 2 assets. The level 
1 assets consist of directly held stocks, and the level 2 
assets consist of an open-end mutual fund and a 
commingled trust where the NAV/unit price is not publicly 
published but the investment can be readily disposed of at 
the NAV/unit price. Directly held stocks are valued at the 
closing price reported in the active market on which the 
individual security is traded, and the mutual fund is valued 
at NAV, while the commingled trust is valued at the unit 
price of the trust. This asset class includes investments 
primarily in foreign equity common stocks.

EMERGING MARKET EQUITY. These are level 1 assets 
representing mutual funds with published NAV's. These 
mutual funds are valued at NAV. This asset class includes 
investments primarily in common stocks in emerging 
markets.

FIXED INCOME. This is a level 2 asset consisting of a mutual 
fund, valued at NAV, where NAV is not publicly published. 
This asset class includes investments primarily in 
investment grade debt and fixed income securities.

LONG GOVERNMENT/CREDIT. These are level 1 and 2 
assets. The level 1 assets consist of a fixed-income mutual 
fund with a published NAV. This mutual fund is valued at 
NAV.  The level 2 assets consist of directly held fixed-
income securities whose values are determined by closing 
prices if available and by matrix prices for illiquid securities. 
This asset class includes long duration fixed income 
investments primarily in U.S. treasuries, U.S. government 
agencies, municipal securities, mortgage-backed securities, 
asset-backed securities, as well as U.S. and international 
investment-grade corporate bonds.

HIGH YIELD BONDS. These are level 2 assets consisting of a 
limited partnership where valuation is not publicly published 
but the investment can be readily disposed of at market 
value. This asset class includes investments primarily in 
high yield bonds.

EMERGING MARKET DEBT. These are level 1 assets 
consisting of a mutual fund with a published NAV. This 
mutual fund is valued at NAV. This asset class includes 
investments primarily in emerging market debt. 

REAL ESTATE FUNDS. These are level 1 assets consisting of 
a mutual fund with a published NAV. This mutual fund is 
valued at NAV. This asset class includes investments 
primarily in real estate investment trust (REIT) securities. 

ABSOLUTE RETURN STRATEGY. These are level 2 assets 
consisting of a hedge fund of funds where valuation is not 
publicly published but the investment can be readily 
disposed of at unit price. The hedge fund of funds is valued 
at the weighted average value of investments in various 
hedge funds which in turn are valued at the closing price of 
the underlying securities. This asset class includes 
investments primarily in common stocks and fixed income 
securities. 

72

  
The following table presents the fair value of plan assets, including outstanding receivables and liabilities, of the Retirement 
Trust Fund as of December 31, 2012 and 2011:

In thousands

Investments

U.S. large cap equity

U.S. small/mid cap equity

Non-U.S. equity

Emerging markets equity

Fixed income

Long government/credit

High yield bonds

Emerging market debt

Real estate funds

Absolute return strategy

Real return strategy

Cash and cash equivalents

Total investments

Investments

U.S. large cap equity

U.S. small/mid cap equity

Non-U.S. equity

Emerging markets equity

Fixed income

Long government/credit

Real estate funds

Absolute return strategy

Real return strategy

Cash and cash equivalents

Total investments

Receivables

Accrued interest and dividend income

Due from broker for securities sold

Total receivables

Liabilities

Due to broker for securities purchased

Total investment in retirement trust

December 31, 2012

Level 1

Level 2

Level 3

Total

$

29,047

$

1,891

$

— $

21,624

13,931

8,004

—

30,098

—

11,421

15,992

—

12,932

—

1,312

15,812

—

8,824

29,249

12,017

—

—

32,078

—

1,459

—

—

—

—

—

—

—

—

—

30,938

22,936

29,743

8,004

8,824

59,347

12,017

11,421

15,992

32,078

12,932

1,459

$

143,049

$

102,642

$

— $

245,691

December 31, 2011

Level 1

Level 2

Level 3

Total

$

36,236

$

— $

— $

—

22,158

10,208

19,121

—

—

—

15,475

—

27,310

11,587

—

—

18,897

—

30,475

—

9,290

—

—

—

—

—

15,317

—

—

—

36,236

27,310

33,745

10,208

19,121

18,897

15,317

30,475

15,475

9,290

$

103,198

$

97,559

$

15,317

$

216,074

December 31,

2012

2011

  $

388

$

4,459

  $

4,847

$

  $

  $

935

249,603

$

$

414

321

735

839

215,970

Level 3 Investments
The following table presents the beginning balance, activity and ending balance of Level 3 investments that have their fair values 
established using significant unobservable inputs as of December 31, 2012: 

In thousands

January 1, 2012 balance

Sales

December 31, 2012 balance

Level 3 Assets

Real Estate Funds

$

$

15,317

(15,317)

—

73

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
9. INCOME TAX 

A reconciliation between income taxes calculated at the 
statutory federal tax rate and the provision for income taxes 
reflected in the consolidated financial statements is as 
follows:

Dollars in thousands

2012

2011

2010

Income taxes at federal
statutory rate

Increase (decrease):

Current state income tax, 
net of federal tax benefit

Amortization of investment 
and energy tax credits

Differences required to be 
flowed-through by 
regulatory commissions

Gains on company and 
trust-owned life insurance

Regulatory asset 
impairment

Other, net

$ 36,386

$ 37,550

$ 42,745

4,773

4,945

5,803

(350)

(442)

(525)

1,718

1,647

1,647

(800)

(786)

(715)

2,700

(323)

—

468

—

507

Total provision for income
taxes

$ 44,104

$ 43,382

$ 49,462

Effective tax rate

42.4%

40.4%

40.5%

The increase in the effective income tax rate for 2012 
compared to the same period in 2011 was primarily due to 
the one-time, after-tax charge of $2.7 million in 2012 related 
to the OPUC's rate case order that the Company could not 
recover deferred amounts resulting from the 2009 Oregon 
tax rate change. 

The provision (benefit) for current and deferred income 
taxes consists of the following:

In thousands

Current

   Federal

   State

Deferred

   Federal

   State

2012

2011

2010

$

1,693

$

130

$ (28,592)

99

1,792

31,767

10,545

42,312

(929)

(799)

1,441

(27,151)

35,481

8,700

44,181

69,159

7,454

76,613

Total provision for 
income taxes

$ 44,104

$ 43,382

$ 49,462

   Total income taxes paid

$

2,979

$

1,756

$ 22,600

The following table summarizes the total provision (benefit) 
for income taxes for the regulated utility and non-utility 
business segments for the three years ended December 31:

In thousands

Regulated utility:

   Current

   Deferred

Deferred investment 
and energy tax credits

Non-utility business
segments:

   Current

   Deferred

2012

2011

2010

$

1,909

$

(4,646) $

(1,464)

39,864

50,152

47,741

(350)

(422)

(525)

41,423

45,084

45,752

(117)

3,846

(25,687)

2,798

2,681

(5,548)

(1,702)

29,397

3,710

Total provision for income
taxes

$ 44,104

$ 43,382

$ 49,462

The following table summarizes the tax effect of significant 
items comprising our deferred income tax accounts for the 
two years ended December 31:

In thousands

Deferred tax liabilities:

   Plant and property

Regulatory adjustment for income 
taxes paid

   Regulatory income tax assets

   Regulatory liabilities

   Non-regulated deferred tax liabilities

      Total

Deferred tax assets:

   Regulatory assets

Unfunded pension and postretirement 
obligations

   Non-regulated deferred tax assets

Alternative minimum tax credit 
carryforward

   Loss and credit carryforwards

      Total

2012

2011

$ 322,527

$ 292,235

—

60,253

51,424

43,824

2,106

65,755

35,638

43,373

$ 478,028

$ 439,107

$

(7,724) $

4,727

6,024

(1,235)

1,986

32,997

32,048

5,119

1,161

1,626

14,255

26,888

Deferred income tax liabilities, net

445,980

412,219

Deferred investment tax credits

624

990

Deferred income taxes and investment
tax credits

$ 446,604

$ 413,209

We have determined that we are more likely than not to 
realize all recorded deferred tax assets as of December 31, 
2012.

On December 17, 2010, President Obama signed into law 
the Tax Relief, Unemployment Insurance Reauthorization, 
and Job Creation Act of 2010 (Tax Relief Act), which allows 
100% bonus depreciation for qualified property placed in 
service between September 9, 2010 through December 31, 
2011. It also extended the 50% bonus depreciation 
deduction to qualifying property placed in service through 
2012. On January 2, 2013, President Obama signed into 
law the American Taxpayer Relief Act of 2012 (“the Act”). 

74

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
This Act extended 50% bonus depreciation under §168(k) 
through 2013 for MACRS property with a recovery period of 
20 years or less.  

The Company estimates that it has net operating loss (NOL) 
carryforwards to 2013 of $83.4 million for federal and $76.6 
million for Oregon. The NOL carryforwards will be carried 
forward to reduce our current tax liability in future years. We 
anticipate that we will be able to utilize the entire NOL 
carryforwards before they expire in 20 years for federal and 
15 years for Oregon.

Uncertain tax positions are accounted for in accordance 
with accounting standards that require management’s 
assessment of the expected treatment of a tax position 
taken in a filed tax return, or planned to be taken in a future 
tax return, that has not been reflected in measuring income 
tax expense for financial reporting purposes. Until such 
positions are sustained by the taxing authorities, we would 
not recognize the tax benefits resulting from such positions 
and would report the tax effect as a liability in the 
Company’s consolidated balance sheet. As of December 
31, 2012, we had no reserves for uncertain tax positions.

The Company settled the Oregon Department of Revenue 
(ODOR) examination of tax years 2006 through 2009. This 
settlement resulted in an additional $0.2 million state tax 
expense, including interest, but that amount was offset  by a 
corresponding refund claim with the state of California. As of 
December 31, 2012, the Company is subject to examination 
by the Internal Revenue Service for the years 2009 through 
2012.

Interest and penalties related to any future income tax 
deficiencies are recorded within income tax expense in the 
consolidated statements of income.

10. PROPERTY, PLANT, AND EQUIPMENT

The following table sets forth the major classifications of our 
property, plant, and equipment and accumulated 
depreciation at December 31:

In thousands

2012

2011

Utility plant in service

$2,435,886

$2,323,467

Utility construction work in progress

46,831

36,051

Less: Accumulated depreciation

789,201

749,603

Utility plant, net

1,693,516

1,609,915

$267.4 million at December 31, 2012 and 2011, 
respectively. These accrued asset removal costs are 
reflected on the balance sheets as regulatory liabilities. See 
Note 2.

11. GAS RESERVES

Our gas reserves are stated at cost, net of regulatory 
amortization, with the associated deferred tax benefits 
recorded as liabilities on the balance sheet. 

We entered into agreements with Encana to develop and 
produce physical gas reserves. These agreements are 
intended to provide long-term gas price protection for our 
utility customers rather than serving as a source of gas 
supply. Encana began drilling in 2011 under these 
agreements, and gas which is currently being produced 
from our working interests in these gas fields is sold by 
Encana at then prevailing market prices, with revenues from 
such sales, net of associated production costs, credited to 
our cost of gas. The cost of gas, including a carrying cost for 
the net rate base investment, is part of our annual Oregon 
PGA filing, which allows us to recover our costs through 
customer rates in a manner previously approved by the 
OPUC. This transaction acted to hedge the cost of gas for 
approximately 4% of our gas supplies for the year ended 
December 31, 2012. The following table outlines our net gas 
reserves investment at December 31:

In thousands

Gas reserves, current

Gas reserves, non-current

Less: Accumulated amortization

Total gas reserves

Less: Deferred taxes on gas reserves

2012

2011

$ 14,966

$ 4,463

92,179

48,597

7,486

99,659

28,329

1,146

51,914

15,630

Net investment in gas reserves

$ 71,330

$ 36,284

Variable Interest Entity Analysis
We concluded that the arrangement with Encana qualifies 
as a variable interest entity (VIE), but that we are not the 
primary beneficiary of these activities as defined by the 
authoritative guidance related to consolidations due to the 
fact that our interest represents a minor portion of total 
extraction activities. We account for our investment in this 
VIE on the cost basis, and it is included under gas reserves 
on our balance sheet. Our maximum loss exposure related 
to this VIE is limited to our current investment balance.

296,781

293,205

12. INVESTMENTS

Non-utility plant in service

Non-utility construction work in
progress

Less: Accumulated depreciation

6,510

23,195

8,379

17,623

Non-utility plant, net

280,096

283,961

Total property, plant, and equipment

$1,973,612

$1,893,876

The weighted average depreciation rate for utility assets 
was 2.8% in 2012, 2011, and 2010. The weighted average 
depreciation rate for non-utility assets was 2.2% in 2012 
and 2011, and 2.5% in 2010.

Accumulated depreciation does not include the accumulated 
provision for asset removal costs of $281.2 million and 

75

Investments include financial investments in life insurance 
policies, which are accounted for at fair value, and equity 
investments in certain partnerships and limited liability 
companies, which are accounted for under the equity or 
cost methods. The following table summarizes our other 
investments at December 31:

In thousands

2012

2011

Investments in life insurance policies

$ 51,439

$ 51,911

Investments in gas pipeline joint ventures

14,216

14,340

Other

   Total other investments

2,012

2,012

$ 67,667

$ 68,263

 
Investment in Life Insurance Policies
We have invested in key person life insurance contracts to 
provide an indirect funding vehicle for certain long-term 
employee and director benefit plan liabilities. The amount in 
the above table is reported as cash surrender value, net of 
policy loans.

not viable or will not go forward, then we could be required 
to recognize a maximum charge of up to approximately 
$13.2 million based on the current amount of our equity 
investment net of cash and working capital at Palomar. We 
will continue to monitor and update our impairment analysis 
as required.

Equity Method Investments
Palomar, a wholly-owned subsidiary of PGH, is pursuing the 
development of a new gas transmission pipeline that would 
provide an interconnection with our utility distribution 
system. PGH is owned 50% by NWN Energy and 50% by 
TransCanada American Investments Ltd., an indirect wholly-
owned subsidiary of TransCanada Corporation.

Variable Interest Entity Analysis
PGH is a development stage VIE. As of December 31, 
2012, there were no changes to our VIE analysis and, as 
such, we continue to report Palomar under equity method 
accounting based on the determination that we are not the 
primary beneficiary of PGH’s activities, as defined by the 
authoritative guidance related to consolidations, due to the 
fact that we have a 50% share and there are no stipulations 
that allow disproportionate influence over the entity. Our 
investment in PGH and Palomar are included in other 
investments on our balance sheet. Our maximum loss 
exposure related to PGH is limited to our equity investment 
balance, less our share of any cash or other assets 
available to us as a 50% owner.

Impairment Analysis
Our investments in nonconsolidated entities accounted for 
under the equity method are reviewed for impairment at 
each reporting period and following updates to our 
corporate planning assumptions. When it is determined that 
a loss in value is other than temporary, a charge is 
recognized for the difference between the investment’s 
carrying value and its estimated fair value. Fair value is 
based on quoted market prices when available, or on the 
present value of expected future cash flows. Differing 
assumptions could affect the timing and amount of a charge 
recorded in any period.

In 2011, Palomar withdrew its original application with the 
FERC for a proposed natural gas pipeline in Oregon and 
informed FERC that it intended to re-file an application to 
reflect changes in the project scope aligning the project with 
the region’s current and future gas infrastructure needs. 
Palomar continues working with customers in the Pacific 
Northwest to further understand their gas transportation 
needs and determine the commercial support for a revised 
pipeline proposal. A new FERC certificate application is 
expected to be filed to reflect a revised scope based on 
these regional needs.

Due to project scope changes in 2011, a portion of the 
assets were impaired and, as a result, we recorded a pre-
tax charge of $1.3 million for our share of these costs at 
December 31, 2011. There have been no significant 
changes to the project since this impairment, and we have 
determined that our remaining equity investment was not 
impaired at December 31, 2012 as the fair value of 
expected cash flows from planned development exceeded 
our remaining equity investment of $13.4 million at 
December 31, 2012. However, if we learn that the project is 

76

13. DERIVATIVE INSTRUMENTS

We enter into swap, option and combinations of option 
contracts for the purpose of hedging natural gas. We 
primarily use these derivative financial instruments to 
manage commodity price variability related to our natural 
gas purchase requirements. A small portion of our derivative 
hedging strategy involves foreign currency exchange 
transactions related to purchases of natural gas from 
Canadian suppliers.

In the normal course of business, we enter into indexed-
price physical forward natural gas commodity purchase (gas 
supply) contracts to meet the requirements of utility 
customers. We also enter into financial derivatives, up to 
prescribed limits, to hedge price variability related to these 
physical gas supply contracts. The following table presents 
the absolute notional amounts related to open positions on 
derivative instruments:

Dollars in thousands

Open position absolute notional amount:

At December 31,

2012

2011

Natural gas (in millions of therms)

39.5

35.9

Foreign exchange

$ 13,231

$ 12,313

Derivatives entered into prudently for future gas years prior 
to our annual PGA filing receive regulatory deferred 
accounting treatment. Derivative contracts entered into after 
the annual PGA rate is set for the current gas contract year 
are subject to our PGA incentive sharing mechanism, which 
provides for either an 80% or 90% deferral of any gains and 
losses as regulatory assets or liabilities, with the remaining 
10% or 20% recognized in current income. All of our 
commodity hedging for the 2012-13 gas year was 
completed prior to the start of the gas year, and these hedge 
prices were included in the Company's PGA filing.  

Certain natural gas purchases from Canadian suppliers are 
payable in Canadian dollars, including both commodity and 
demand charges, which expose us to adverse changes in 
foreign currency rates. Foreign currency forward contracts 
are used to hedge the fluctuation in foreign currency 
exchange rates for our commodity and commodity-related 
demand charges paid in Canadian dollars. Foreign currency 
contracts for commodity costs are purchased on a month-to-
month basis because the Canadian cost is priced at the 
average noon-day exchange rate for each month. Foreign 
currency contracts for demand costs have terms ranging up 
to 12 months. The gains and losses on the shorter-term 
currency contracts for commodity costs are recognized 
immediately in cost of gas. The gains and losses on the 
currency contracts for demand charges are not recognized 
in current income because they are subject to a regulatory 
deferral tariff and, as such, are recorded as a regulatory 
asset or liability. The mark-to-market adjustment at 
December 31, 2012 was an unrealized gain of $0.1 million. 

 
This unrealized gain is subject to regulatory deferral and, as 
such, was recorded as a derivative instrument, which is 
offset by recording a corresponding amount to a regulatory 
liability account.

Derivative hedge contracts are subject to a hedge 
effectiveness test to determine the financial statement
treatment of each specific derivative. As of December 31, 
2012, all of our derivatives were effective economic hedges 
and either qualified or were expected to qualify for 

regulatory deferral or hedge accounting treatment. The 
effectiveness test applied to financial derivatives is 
dependent on the type of derivative and its use. We use the 
hypothetical derivative method under accounting standards 
for derivatives and hedging to determine the hedge 
effectiveness for our interest rate swaps and the dollar offset 
method for other derivative contracts under accounting 
standards for derivatives and hedging. All derivatives were 
effective as of December 31, 2012.

The following table reflects the income statement presentation for the unrealized gains and losses from our derivative 
instruments for the years ended December 31, 2012 and 2011. All of our currently outstanding derivative instruments are related 
to regulated utility operations as illustrated by the derivative gains and losses being deferred to balance sheet accounts in 
accordance with regulatory accounting standards.

In thousands
 Cost of sales
 Other comprehensive income (loss)
 Less:
 Amounts deferred to regulatory accounts on balance sheet

Total impact on earnings

2012

2011

Natural gas 
commodity(1)

Foreign 
exchange (2)

Natural gas 
commodity(1)

Foreign 
exchange (2)

$

$

(5,850) $

— $

(60,799) $

—

65

—

5,850

— $

(65)

— $

60,799

— $

—

(201)

201

—

(1) Unrealized gain (loss) from natural gas commodity hedge contracts is recorded in cost of sales and reclassified to regulatory deferral accounts 
on the balance sheet.
(2) Unrealized gain (loss) from foreign exchange forward purchase contracts is recorded in other comprehensive income, and reclassified to 
regulatory deferral accounts on the balance sheet.

No collateral was posted with or by our counterparties as of December 31, 2012 or 2011. We attempt to minimize the potential 
exposure to collateral calls by counterparties to manage our liquidity risk. Counterparties generally allow a certain credit limit 
threshold before requiring us to post collateral against loss positions. Given our counterparty credit limits and portfolio 
diversification, we have not been subject to collateral calls in 2011 or 2012. Our collateral call exposure is set forth under credit 
support agreements, which generally contain credit limits. We could also be subject to collateral call exposure where we have 
agreed to provide adequate assurance, which is not specific as to the amount of credit limit allowed, but could potentially require 
additional collateral in the event of a material adverse change. Based upon current contracts outstanding, which reflect 
unrealized losses of $5.8 million at December 31, 2012, we have estimated the level of collateral demands, with and without 
potential adequate assurance calls, using current gas prices and various credit downgrade rating scenarios for NW Natural as 
follows:

In thousands

(Current
Ratings) A+/A3

BBB+/Baa1

BBB/Baa2

BBB-/Baa3

Speculative

With Adequate Assurance Calls

Without Adequate Assurance Calls

$

$

— $

— $

— $

— $

— $

— $

— $

— $

1,623

1,457

Credit Rating Downgrade Scenarios

As of December 31, 2012 and 2011, we realized net losses 
of $70.2 million and $56.5 million, respectively, from the 
settlement of natural gas hedge contracts at maturity, which 
were recorded as increases to the cost of gas. The currency 
exchange rate in all foreign currency forward purchase 
contracts is included in our purchased cost of gas at 
settlement; therefore, no gain or loss is recorded from the 
settlement of those contracts.

We are exposed to derivative credit risk primarily through 
securing pay-fixed natural gas commodity swaps to hedge 
the risk of price increases for our natural gas purchases on 
behalf of customers. We utilize master netting arrangements 
through International Swaps and Derivatives Association 
contracts to minimize this risk along with collateral support 
agreements with counterparties based on their credit 

ratings. In certain cases we require guarantees or letters of 
credit from counterparties in order for them to meet our 
minimum credit requirement standards.

Our financial derivatives policy requires counterparties to 
have a certain investment-grade credit rating at the time the 
derivative instrument is entered into, and the policy specifies 
limits on the contract amount and duration based on each 
counterparty’s credit rating. We do not speculate with 
derivatives; instead we utilize derivatives to hedge our 
exposure above risk tolerance limits. Any increase in market 
risk created by the use of derivatives should be offset by the 
exposures they modify.

We actively monitor our derivative credit exposure and place 
counterparties on hold for trading purposes or require other 

77

  
forms of credit assurance, such as letters of credit, cash 
collateral or guarantees as circumstances warrant. Our 
ongoing assessment of counterparty credit risk includes 
consideration of credit ratings, credit default swap spreads, 
bond market credit spreads, financial condition, government 
actions and market news. We utilize a Monte-Carlo 
simulation model to estimate the change in credit and 
liquidity risk from the volatility of natural gas prices. We use 
the results of the model to establish earnings-at-risk trading 
limits. Our credit risk for all outstanding derivatives at 
December 31, 2012 currently does not extend beyond 
February 2016.

We could become materially exposed to credit risk with one 
or more of our counterparties if natural gas prices 
experience a significant increase. If a counterparty were to 
become insolvent or fail to perform on its obligations, we 
could suffer a material loss, but we would expect such loss 
to be eligible for regulatory deferral and rate recovery, 
subject to prudence review. All of our existing counterparties 
currently have investment-grade credit ratings.

Fair Value
In accordance with fair value accounting, we include 
nonperformance risk in calculating fair value adjustments. 
This includes a credit risk adjustment based on the credit 
spreads of our counterparties when we are in an unrealized 
gain position, or on our own credit spread when we are in an 
unrealized loss position. The inputs in our valuation 
techniques include natural gas futures, volatility, credit 
default swap spreads and interest rates. Additionally, our 
assessment of non-performance risk is generally derived 
from the credit default swap market and from bond market 
credit spreads. The impact of the credit risk adjustments for 
all outstanding derivatives was immaterial to the fair value 
calculation at December 31, 2012. As of December 31, 2012 
and 2011, the fair value was a liability of $5.8 million and 
$61.0 million, respectively, using significant other 
observable, or level 2, inputs. We have used no level 3 
inputs in our derivative valuations. We did not have any 
transfers between level 1 or level 2 during the years ended 
December 31, 2012 and 2011.

14. COMMITMENTS AND CONTINGENCIES

Leases
We lease land, buildings and equipment under agreements 
that expire in various years through 2108. Rental expense 
under operating leases was $4.8 million, $5.4 million and 
$5.1 million for the years ended December 31, 2012, 2011 
and 2010, respectively. The table below reflects the future 
minimum lease payments due under non-cancelable leases 
at December 31, 2012. These commitments relate 
principally to the lease of our office headquarters, 
underground gas storage facilities, vehicles and computer 
equipment.

In thousands

2013

2014

2015

2016

2017

Thereafter

   Total

Operating 
leases

Capital 
leases

$

5,415

$

547

$

5,655

5,498

5,478

5,474

33,187

335

136

42

1

—

Minimum 
lease 
payments

5,962

5,990

5,634

5,520

5,475

33,187

$

60,707

$

1,061

$

61,768

Gas  Purchase  and  Pipeline  Capacity  Purchase  and 
Release Commitments
We have signed agreements providing for the reservation of 
firm pipeline capacity under which we are required to make 
fixed monthly payments for contracted capacity. The pricing 
component of the monthly payment is established, subject 
to change, by U.S. or Canadian regulatory bodies. In 
addition, we have entered into long-term sale agreements to 
release firm pipeline capacity. We also enter into short-term 
and long-term gas purchase agreements. The aggregate 
amounts of these agreements were as follows at December 
31, 2012:

In thousands

2013

2014

2015

2016

2017

Thereafter

   Total

Less: Amount 
representing 
interest

Total at present 
value

Gas
Purchase 
Agreements

Pipeline
Capacity
Purchase 
Agreements

Pipeline
Capacity
Release 
Agreements

$

104,443

$

90,823

$

3,464

12,166

—

—

—

—

116,609

86,119

72,707

61,398

48,503

240,929

600,479

—

—

—

—

—

3,464

129

87,263

—

$

116,480

$

513,216

$

3,464

Our total payments for fixed charges under capacity 
purchase agreements were $94.3 million in 2012, $94.2 
million in 2011, and $91.4 million in 2010. Included in the 
amounts were reductions for capacity release sales of $4.2 
million for 2012, $3.1 million for 2011, and $4.2 million for 
2010. In addition, per-unit charges are required to be paid 
based on the actual quantities shipped under the 
agreements. In certain take-or-pay purchase commitments, 
annual deficiencies may be offset by prepayments subject 
to recovery over a longer term if future purchases exceed 
the minimum annual requirements.

Environmental Matters
See Note 15 Environmental Matters for a discussion of 
environmental commitments and contingencies.

78

 
 
15. ENVIRONMENTAL MATTERS

We own, or previously owned, properties that may require 
environmental remediation or action. We estimate the range 
of loss for environmental liabilities based on current 
remediation technology, enacted laws and regulations, 
industry experience gained at similar sites and an 
assessment of the probable level of involvement and 
financial condition of other potentially responsible parties. 
Due to the numerous uncertainties surrounding the course 
of environmental remediation and the preliminary nature of 
several site investigations, in some cases, we may not be 
able to reasonably estimate the high end of the range of 
possible loss. In those cases, we have disclosed the nature 
of the possible loss and the fact that the high end of the 
range cannot be reasonably estimated. Unless there is an 
estimate within a range of possible losses that is more likely 
than other cost estimates within that range, we record the 
liability at the low end of this range. It is likely that changes 
in these estimates and ranges will occur throughout the 
remediation process for each of these sites due to our 
continued evaluation and clarification concerning our 
responsibility, the complexity of environmental laws and 
regulations and the determination by regulators of 
remediation alternatives.  

Environmental site remediation costs are deferred under 
regulatory approval from the OPUC and WUTC. In addition, 

the OPUC authorized an SRRM that allows the Company to 
recover prudently incurred environmental site remediation 
costs, subject to an earnings test that will be defined in a 
future proceeding. Actual cost recovery under SRRM will 
depend upon future insurance recoveries, future 
expenditures, annual prudence reviews, and the impacts of 
any earnings test the OPUC may adopt in a subsequent 
proceeding. Cost recovery and carrying charges on 
amounts deferred for costs associated with services 
provided to Washington customers will be determined in a 
future proceeding. We annually review all regulatory assets 
for recoverability and more often if circumstances warrant. If 
we should determine that all or a portion of these regulatory 
assets no longer meet the criteria for continued application 
of regulatory accounting, then we would be required to write 
off the net unrecoverable balances against earnings in the 
period such determination is made.

In December 2010, NW Natural commenced litigation 
against certain of its historical liability insurers in Multnomah 
County Circuit Court, State of Oregon (see Item 3. Legal 
Proceedings). NW Natural seeks damages in excess of $50 
million in losses it has incurred to date, as well as 
declaratory relief for additional losses it expects to incur in 
the future.  

The following table summarizes information regarding liabilities related to environmental sites, which are recorded in other 
current liabilities and other noncurrent liabilities on the balance sheet at December 31: 

Thousands

Portland Harbor site:

Gasco/Siltronic Sediments

Other Portland Harbor

Gasco Upland site

Siltronic Upland site

Central Service Center site

Front Street site

Oregon Steel Mills

Total

Current Liabilities

Non-Current Liabilities

2012

2011

2012

2011

$

2,207

$

1,614

$

36,087

$

35,797

1,767

18,722

637

140

993

—

1,893

14,092

887

—

1,697

—

3,160

5,028

379

396

—

185

7,066

8,900

128

495

—

120

$

24,466

$

20,183

$

45,235

$

52,506

In addition, the following table presents information 
regarding the total amount of cash paid for environmental 
sites and the total regulatory asset deferred as of December 
31:

Thousands

Cash paid

2012

2011

$

71,124

$

55,553

Total regulatory asset deferral(1)

126,482

105,670

(1) Total regulatory asset deferral includes cash paid, remaining 
liability, interest, and insurance reimbursement.

PORTLAND HARBOR SITE. The Portland Harbor is an 
EPA listed Superfund site that is approximately 11 miles 

long on the Willamette River and is adjacent to NW 
Natural's Gasco upland and Siltronic upland sites. We have 
been notified that we are a potentially responsible party to 
the Superfund site and we have joined with other potentially 
responsible parties (the Lower Willamette Group or LWG) to 
develop a Portland Harbor Remedial Investigation/
Feasibility Study (RI/FS). The LWG submitted a draft 
Feasibility Study (FS) to EPA in March 2012 that provides a 
range of remedial costs for the entire Portland Harbor 
Superfund Site, which includes the Gasco/Siltronic 
Sediment site, discussed below. The range of costs 
estimated for various remedial alternatives for the entire 
Portland Harbor, as provided in the draft FS, is $169 million 
to $1.8 billion. NW Natural's potential liability is a portion of 
the costs of the remedy EPA will select for the entire 

79

Portland Harbor Superfund site. The cost of that remedy is 
expected to be allocated among more than 100 potentially 
responsible parties. NW Natural is participating in a non-
binding allocation process in an effort to settle this potential 
liability.  We manage our liability related to the Superfund 
site as two distinct remediation projects, the Gasco/Siltronic 
Sediment and Other Portland Harbor projects.

Gasco/Siltronic Sediments. In 2009, NW Natural and Siltronic 
Corporation entered into a separate Administrative Order on 
Consent with EPA to evaluate and design specific remedies 
for sediments adjacent to the Gasco upland and Siltronic 
upland sites. NW Natural submitted a draft Engineering 
Evaluation/Cost Analysis (EE/CA) to the EPA in May 2012 to 
provide the estimated cost of potential remedial alternatives 
for this site. At this time, the estimated costs for the various 
sediment remedy alternatives in the draft EE/CA range from 
$38.3 million to $350 million. We have recorded a liability of 
$34.0 million for the sediment clean-up, which reflects the 
low end of the EE/CA range. We have recorded an 
additional liability of $4.3 million for the additional studies 
and design work needed before the clean-up can occur, and 
for regulatory oversight throughout the clean-up. At this 
time, we believe sediments at this site represent the largest 
portion of our liability related to the Portland Harbor site, 
discussed above.  

Other Portland Harbor. NW Natural incurs costs related to its 
membership in the LWG which is performing the RI/FS for 
EPA. NW Natural also incurs costs related to natural 
resource damages. In 2008, the Portland Harbor Natural 
Resource Trustee Council advised a number of potentially 
responsible parties that it intended to pursue natural 
resource damage claims at the Portland Harbor Superfund 
site. The Company and other parties have signed a 
cooperative agreement with the Natural Resource Trustees 
to participate in a phased natural resource damage 
assessment to estimate liabilities to support an early 
restoration-based settlement of natural resource damage 
claims. We have accrued a liability for these claims which is 
at the low end of the range of the potential liability. This 
liability is not included in the range of costs provided in the 
draft FS for the Portland Harbor.

Gasco upland site. NW Natural owns a former gas 
manufacturing plant that was closed in 1956 (Gasco site) 
and is adjacent to the Portland Harbor site described above. 
The Gasco site has been under investigation by us for 
environmental contamination under the ODEQ Voluntary 
Clean-Up Program. It is not included in the range of 
remedial costs for the Portland Harbor site. We manage the 
Gasco site in two parts, the uplands portion and the 
groundwater source control action. 

In May 2007, we completed a revised Remedial 
Investigation Report for the uplands portion and submitted it 
to ODEQ for review. We have recognized a liability for this 
portion of the site remediation which is at the low end of the 
range of potential liability. 

In 2012, ODEQ approved our final design remediation plan 
for the groundwater source control portion and we began 
construction in October 2012. Based on the information 
currently available for groundwater source control at the 

80

Gasco site and our current assumptions regarding the 
effectiveness of the source control system, we have 
estimated a range of liability between $14 million and $30 
million, for which we have recorded an accrued liability 
which is at the low end of the range of the potential 
liability. We are uncertain about the range due to potential 
additional ODEQ requirements and actions needed to meet 
those requirements, including uncertainty about how to meet 
the agreed standards set by ODEQ subsequent to the initial 
testing of the system and as part of the final remedy for the 
upland portion of the Gasco site.

Other sites. In addition to those sites above, we have 
environmental exposures at four other sites, Siltronic, 
Central Service Center, Front Street, and Oregon Steel 
Mills. Due to the uncertainty of the design of remediation, 
regulation, timing of the liabilities, and in the case of the 
Oregon Steel Mills site, pending litigation, liabilities for each 
of these sites has been recognized at their respective low 
end of the range of potential liability and the high end of the 
range cannot be reasonably estimated. 

Siltronic upland site. Siltronic is the location of a 
manufactured gas plant formerly owned by NW Natural.   
We are currently conducting an investigation of 
manufactured gas plant wastes on the uplands at this site 
for the ODEQ.  

Central Service Center site. We are currently performing an 
environmental investigation of the property under the 
ODEQ's Independent Cleanup Pathway. This site is on 
ODEQ's list of sites in which releases of hazardous 
substances have been confirmed and cleanup is necessary. 

Front Street site. The Front Street site was the former 
location of a gas manufacturing plant we operated. Studies 
for source control investigation have been presented to 
ODEQ and a final sampling plan required by ODEQ is 
currently being developed. 

Oregon Steel Mills site. See “Legal Proceedings,” below.

Legal Proceedings
NW Natural is subject to claims and litigation arising in the 
ordinary course of business. Although the final outcome of 
any of these legal proceedings cannot be predicted with 
certainty, including the matter described below, NW Natural 
does not expect that the ultimate disposition of any of these 
matters will have a material effect on our financial condition, 
results of operations or cash flows as we would expect to 
receive insurance recovery or rate recovery. See also Part 
II, Item 1, “Legal Proceedings.”

OREGON STEEL MILLS SITE. In 2004, NW Natural was 
served with a third-party complaint by the Port of Portland 
(the Port) in a Multnomah County Circuit Court case, 
Oregon Steel Mills, Inc. v. The Port of Portland. The Port 
alleges that in the 1940s and 1950s petroleum wastes 
generated by our predecessor, Portland Gas & Coke 
Company, and 10 other third-party defendants were 
disposed of in a waste oil disposal facility operated by the 
United States or Shaver Transportation Company on 
property then owned by the Port and now owned by Oregon 
Steel Mills. The complaint seeks contribution for unspecified 

 
 
 
 
past remedial action costs incurred by the Port regarding the 
former waste oil disposal facility as well as a declaratory 
judgment allocating liability for future remedial action 
costs.  No date has been set for trial. Although the final 

outcome of this proceeding cannot be predicted with 
certainty, we do not expect that the ultimate disposition of 
this matter will have a material effect on our financial 
condition, results of operations or cash flows.

NORTHWEST NATURAL GAS COMPANY
QUARTERLY FINANCIAL INFORMATION (UNAUDITED)

Quarter ended

In thousands, except share data

March 31

June 30

Sept. 30

Dec. 31

2012

Operating revenues

Net income (loss)

Basic earnings (loss) per share(1)

Diluted earnings (loss) per share(1)

2011

Operating revenues

Net income (loss)

Basic earnings (loss) per share(1)

Diluted earnings (loss) per share(1)

$

309,639

$

103,991

$

87,501

$

40,607

1.52

1.51

1,409

0.05

0.05

(10,558)

(0.39)

(0.39)

$

315,133

$

157,354

$

90,916

$

40,773

1.53

1.53

2,193

0.08

0.08

(8,312)

(0.31)

(0.31)

229,476

28,397

1.06

1.05

264,652

29,244

1.09

1.09

(1) Quarterly earnings (loss) per share are based upon the average number of common shares outstanding during each quarter. Variations in 
earnings between quarterly periods are due primarily to the seasonal nature of our business. 

NORTHWEST NATURAL GAS COMPANY
SCHEDULE II - VALUATION AND QUALIFYING ACCOUNTS AND RESERVES

COLUMN A

COLUMN B

COLUMN C

Additions

COLUMN D

COLUMN E

Deductions

In thousands (year ended December 31)

2012

Reserves deducted in balance sheet from
assets to which they apply:

Balance at 
beginning of 
period

Charged to 
costs and 
expenses

Charged to 
other accounts

Net write-offs

Balance at end 
of period

Allowance for uncollectible accounts

$

2,895

$

1,130

$

— $

1,507

$

2,518

2011

Reserves deducted in balance sheet from
assets to which they apply:

Allowance for uncollectible accounts

2,950

1,919

2010

Reserves deducted in balance sheet from
assets to which they apply:

Allowance for uncollectible accounts

3,125

1,717

—

—

1,974

2,895

1,892

2,950

81

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
ITEM 9. CHANGES IN AND DISAGREEMENTS 
WITH ACCOUNTANTS ON ACCOUNTING AND 
FINANCIAL DISCLOSURE

None.

periods specified in the Securities and Exchange 
Commission (SEC) rules and forms and that such 
information is accumulated and communicated to 
management, including the Chief Executive Officer and 
Chief Financial Officer, as appropriate to allow timely 
decisions regarding required disclosure.

ITEM 9A. CONTROLS AND PROCEDURES

(b) Changes in Internal Control Over Financial Reporting

(a) Evaluation of Disclosure Controls and Procedures

Our management, under the supervision and with the 
participation of our Chief Executive Officer and Chief 
Financial Officer, has completed an evaluation of the 
effectiveness of the design and operation of our disclosure 
controls and procedures (as defined in Rules 13a-15(e) and 
15d-15(e) of the Securities Exchange Act of 1934, as 
amended (the “Exchange Act”)). Based upon this 
evaluation, our Chief Executive Officer and Chief Financial 
Officer have concluded that, as of the end of the period 
covered by this report, our disclosure controls and 
procedures were effective to ensure that information 
required to be disclosed by us and included in our reports 
filed or submitted under the Exchange Act is recorded, 
processed, summarized and reported within the time 

Our management is responsible for establishing and 
maintaining adequate internal control over financial 
reporting, as such term is defined in the Exchange Act Rule 
13a-15(f).

There have been no changes in our internal control over 
financial reporting that occurred during the quarter ended 
December 31, 2012 that have materially affected, or are 
reasonably likely to materially affect, our internal control 
over financial reporting. The statements contained in Exhibit 
31.1 and Exhibit 31.2 should be considered in light of, and 
read together with, the information set forth in this Item 9(a).

ITEM 9B. OTHER INFORMATION

None.

82

 
 
 
 
 
PART III

ITEM 10. DIRECTORS, EXECUTIVE OFFICERS AND CORPORATE GOVERNANCE

Information concerning our Board of Directors, its Committees and the Audit Committee financial expert contained in NW 
Natural’s definitive Proxy Statement for the May 23, 2013 Annual Meeting of Shareholders is hereby incorporated by reference. 
The information concerning “Section 16(a) Beneficial Ownership Reporting Compliance” and “Corporate Governance” contained 
in our definitive Proxy Statement for the May 23, 2013 Annual Meeting of Shareholders is hereby incorporated by reference.

Name

Gregg S. Kantor

David H. Anderson

Margaret D. Kirkpatrick

Lea Anne Doolittle

J. Keith White

David R. Williams

Grant M. Yoshihara

C. Alex Miller

Stephen P. Feltz

MardiLyn Saathoff

David A. Weber

Age at  
Dec. 31, 
2012

55

51

58

57

59

59

57

55

57

56

53

Positions held during last five years
President and Chief Executive Officer (2009-   ); President and Chief 
Operating Officer (2007-2008); Executive Vice President (2006-2007); 
Senior Vice President, Public and Regulatory Affairs (2003-2006).
Executive Vice President Operations and Regulation (2013-  ); Senior 
Vice President and Chief Financial Officer (2004-2013).
Senior Vice President and General Counsel (2013-  ); Vice President 
and General Counsel (2005-2013).

Senior Vice President and Chief Administrative Officer (2013-  ); Senior 
Vice President (2008- ); Vice President, Human Resources 
(2000-2007).

Vice President, Business Development and Energy Supply/Chief
Strategic Officer (2007-  ); Managing Director, Gas Operations and
Wholesale Services (2005-2006); Managing Director and Chief
Strategic Officer (2003-2005).

Vice President, Utility Services (2007-  ); Director of Utility Operations, 
Districts and Managed Labor Relations (2004-2006).

Vice President, Utility Operations (2007-   ); Managing Director, Utility
Services (2005-2006); Director, Utility Services (2004-2005).

Vice President Regulation and Treasurer (2013-  ); Vice President, 
Finance and Regulation (2009-2013); Assistant Treasurer (2008-  ); 
General Manager of Rates and Regulatory Affairs (2002-2009).

Senior Vice President and Chief Financial Officer (2013-  ); Assistant 
Secretary (2007- ); Treasurer and Controller (1999-2013).

Vice President Legal, Risk and Land (2013-  ); Deputy General 
Counsel (2010-2013); Chief Governance Officer and Corporate 
Secretary (2008-  ); Chief Compliance Officer and Assistant General 
Counsel, Tektronix, Inc. (2005-2008).

President and Chief Executive Officer, NW Natural Gas Storage, LLC 
and Gill Ranch Storage, LLC (2012-  ); Interim President and Chief 
Executive Officer, NW Natural Gas Storage LLC, and Gill Ranch 
Storage, LLC (2011-2012); Chief Operating Officer NW Natural Gas 
Storage, LLC and Gill Ranch Storage LLC (November 2010 - January 
2011); Managing Director of Information Services and Chief 
Information Officer (2005 - 2011); Director of Information Services and 
Chief Information Officer (2001-2005).

Each executive officer serves successive annual terms; 
present terms end on May 23, 2013. There are no family 
relationships among our executive officers, directors or any 
person chosen to become one of our officers or directors.

NW Natural has adopted a Code of Ethics (Code) applicable 
to all employees and officers that is available on our website 
at www.nwnatural.com. We intend to disclose on our 
website at www.nwnatural.com any amendments to the 
Code or waivers of the Code for executive officers.

ITEM 11. EXECUTIVE COMPENSATION

The information concerning “Executive Compensation” and 
“Report of the Organization and Executive Compensation 
Committee” contained in our definitive Proxy Statement for 
the May 23, 2013 Annual Meeting of Shareholders is hereby 
incorporated by reference. Information related to Executive 
Officers as of December 31, 2012 is reflected in Part III, 
Item 10, above.

83

 
  
  
ITEM 12. SECURITY OWNERSHIP OF CERTAIN BENEFICIAL OWNERS AND MANAGEMENT AND 
RELATED STOCKHOLDER MATTERS

The following table sets forth information regarding compensation plans under which equity securities of NW Natural are 
authorized for issuance as of December 31, 2012 (see Note 6 to the Consolidated Financial Statements):

Plan Category

Equity compensation plans approved by security holders:
LTIP Performance Share Awards (Target Award)(1)(2)
LTIP Restricted Stock Units (Target Award)(1)(2)
LTIP Stock Options(2)

Restated Stock Option Plan

Employee Stock Purchase Plan

Equity compensation plans not approved by security holders:

Executive Deferred Compensation Plan (EDCP)(3)
Directors Deferred Compensation Plan (DDCP)(3)
Deferred Compensation Plan for Directors and Executives (DCP)(4)

Total

(a)

(b)

(c)

Number of securities
to be issued upon
exercise of
outstanding options,
warrants and rights

Weighted-average
exercise price of
outstanding options,
warrants and rights

Number of securities 
remaining available 
for future issuance 
under equity 
compensation plans 
(excluding securities 
reflected in column 
(a))

114,707

24,864

—

529,925

$

17,560

2,748

59,324

125,282

874,410

n/a

n/a

—

42.22

39.56

n/a

n/a

n/a

451,922

451,922

250,000

—

120,238

n/a

n/a

n/a

822,160

(1)  Shares issued pursuant to performance share awards and restricted stock units under the LTIP do not include an exercise price, but are 
payable when the award criteria are satisfied. If the maximum awards were paid pursuant to the performance-based awards outstanding at 
December 31, 2012, the number of shares shown in column (a) would increase by 114,707 shares and the number of shares shown in column 
(c) would decrease by the same amount of shares.
The aggregate 451,922 shares available for future issuance under the LTIP as Restricted Stock Units or Performance Share Awards are also 
available for issuance of LTIP Stock Options. Therefore, a total of 701,922 shares are available for LTIP Stock Option issuance at December 
31, 2012. The 250,000 shares available for LTIP Stock Options at December 31, 2012 are not available for issuance of LTIP Restricted Stock 
Units or Performance Share Awards. 

(2) 

(3)  Prior to January 1, 2005, deferred amounts were credited, at the participant’s election, to either a “cash account” or a “stock account.” If deferred 
amounts were credited to stock accounts, such accounts were credited with a number of shares of NW Natural common stock based on the 
purchase price of the common stock on the next purchase date under our Dividend Reinvestment and Direct Stock Purchase Plan, and such 
accounts were credited with additional shares based on the deemed reinvestment of dividends. Cash accounts are credited quarterly with 
interest at a rate equal to Moody’s Average Corporate Bond Yield plus two percentage points, subject to a 6% minimum rate. At the election 
of the participant, deferred balances in the stock accounts are payable after termination of Board service or employment in a lump sum, in 
installments over a period not to exceed 10 years in the case of the DDCP, or 15 years in the case of the EDCP, or in a combination of lump 
sum and installments. We have contributed common stock to the trustee of the Umbrella Trusts such that the Umbrella Trusts hold approximately 
the number of shares of common stock equal to the number of shares credited to all participants’ stock accounts.

(4)  Effective January 1, 2005, the EDCP and DDCP were closed to new participants and replaced with the DCP. The DCP continues the basic 
provisions of the EDCP and DDCP under which deferred amounts are credited to either a “cash account” or a “stock account.” Stock accounts 
represent a right to receive shares of NW Natural common stock on a deferred basis, and such accounts are credited with additional shares 
based on the deemed reinvestment of dividends. Effective January 1, 2007, cash accounts are credited quarterly with interest at a rate equal 
to Moody’s Average Corporate Bond Yield. Our obligation to pay deferred compensation in accordance with the terms of the DCP will generally 
become due on retirement, death, or other termination of service, and will be paid in a lump sum or in installments of five or 10 years as elected 
by the participant in accordance with the terms of the DCP. We have contributed common stock to the trustee of the Supplemental Trust such 
that this trust holds approximately the number of common shares equal to the number of shares credited to all participants' stock accounts. 
The right of each participant in the DCP is that of a general, unsecured creditor of the Company.

The information captioned “Beneficial Ownership of Common Stock by Directors and Executive Officers” contained in our 
definitive Proxy Statement for the May 23, 2013 Annual Meeting of Shareholders is incorporated herein by reference.

ITEM 13. CERTAIN RELATIONSHIPS AND 
RELATED TRANSACTIONS, AND DIRECTOR 
INDEPENDENCE

The information captioned “Transactions with Related 
Persons” and “Corporate Governance” in the Company’s 
definitive Proxy Statement for the May 23, 2013 Annual 
Meeting of Shareholders is hereby incorporated by 
reference.

ITEM 14. PRINCIPAL ACCOUNTANT FEES AND 
SERVICES

The information captioned “2012 and 2011 Audit Firm Fees” 
in the Company’s definitive Proxy Statement for the May 23, 
2013 Annual Meeting of Shareholders is hereby 
incorporated by reference.

84

 
 
 
 
 
 
 
 
 
 
ITEM 15. EXHIBITS AND FINANCIAL STATEMENT SCHEDULES

(a)  The following documents are filed as part of this report:

PART IV

1.  A list of all Financial Statements and Supplemental Schedules is incorporated by reference to Item 8.

2.  List of Exhibits filed:

Reference is made to the Exhibit Index commencing on page 87.

85

  
 
SIGNATURES

Pursuant  to  the  requirements  of  Section  13  or  15(d)  of  the 
Securities  Exchange  Act  of  1934,  the  registrant  has  duly 
caused  this  report  to  be  signed  on  its  behalf  by  the 
undersigned, thereunto duly authorized.

NORTHWEST NATURAL GAS COMPANY

By: /s/ Gregg S. Kantor
Gregg S. Kantor
President and Chief Executive Officer
Date: March 1, 2013      

Pursuant to the requirements of the Securities Exchange Act of 1934, this report has been signed below by the following persons 
on behalf of the registrant and in the capacities and on the date indicated.

Signature

/s/ Gregg S. Kantor

Gregg S. Kantor

President and Chief Executive Officer

/s/ Stephen P. Feltz  

Stephen P. Feltz

Senior Vice President and Chief Financial Officer

/s/ Brody J. Wilson   

Brody J. Wilson

Acting Controller

/s/ Timothy P. Boyle 

Timothy P. Boyle 

/s/ Martha L. Byorum     

Martha L. Byorum

/s/ John D. Carter     

John D. Carter

/s/ Mark S. Dodson

Mark S. Dodson

/s/ C. Scott Gibson

C. Scott Gibson

/s/ Tod R. Hamachek

Tod R. Hamachek

/s/ Jane L. Peverett 

Jane L. Peverett 

/s/ George J. Puentes

George J. Puentes

/s/ Kenneth Thrasher  

Kenneth Thrasher

Title

Date

Principal Executive Officer and Director

March 1, 2013

Principal Financial Officer

March 1, 2013

Principal Accounting Officer

March 1, 2013

)

)
)
)

)
)
)

)
)
)

)
)
)

)
March 1, 2013
)

)
)
)

)
)
)

)
)
)

)

  Director

  Director

  Director

  Director

  Director

  Director

  Director

  Director

  Director

86

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
NORTHWEST NATURAL GAS COMPANY
 Exhibit Index to Annual Report on Form 10-K
For the Fiscal Year Ended December 31, 2012

Exhibit Number                                                        Document

*3a.

*3b.

*4a.

*4b.

*4c.

*4d.

*4e.

*4f.

*4g.

*4h.

*4i.

*4j.

Restated Articles of Incorporation, as filed and effective May 31, 2006 and amended June 3, 2008 (incorporated 
herein by reference to Exhibit 3.1 to Form 10-Q for the period ending June 30, 2008, File No. 1-15973).

Bylaws as amended May 24, 2012 (incorporated herein by reference to Exhibit 3.1 to Form 8-K dated May 24, 2012, 
File No. 1-15973).

Copy of Mortgage and Deed of Trust, dated as of July 1, 1946, to Bankers Trust and R. G. Page (to whom Stanley
Burg is now successor), Trustees (incorporated herein by reference to Exhibit 7(j) in File No. 2-6494); and copies of
Supplemental Indentures Nos. 1 through 14 to the Mortgage and Deed of Trust, dated respectively, as of June 1,
1949, March 1, 1954, April 1, 1956, February 1, 1959, July 1, 1961, January 1, 1964, March 1, 1966, December 1,
1969, April 1, 1971, January 1, 1975, December 1, 1975, July 1, 1981, June 1, 1985 and November 1, 1985
(incorporated herein by reference to Exhibit 4(d) in File No. 33-1929); Supplemental Indenture No. 15 to the Mortgage
and Deed of Trust, dated as of July 1, 1986 (filed as Exhibit 4(c) in File No. 33-24168); Supplemental Indentures Nos.
16, 17 and 18 to the Mortgage and Deed of Trust, dated, respectively, as of November 1, 1988, October 1, 1989 and
July 1, 1990 (incorporated herein by reference to Exhibit 4(c) in File No. 33-40482); Supplemental Indenture No. 19 to
the Mortgage and Deed of Trust, dated as of June 1, 1991 (incorporated herein by reference to Exhibit 4(c) in File No.
33-64014); and Supplemental Indenture No. 20 to the Mortgage and Deed of Trust, dated as of June 1, 1993
(incorporated herein by reference to Exhibit 4(c) in File No. 33-53795).

Copy of Indenture, dated as of June 1, 1991, between the Company and Bankers Trust Company, Trustee, relating to
the Company’s Unsecured Medium-Term Notes (incorporated herein by reference to Exhibit 4(e) in File No.
33-64014).

Officers’ Certificate dated June 12, 1991 creating Series A of the Company’s Unsecured Medium-Term Notes
(incorporated herein by reference to Exhibit 4e. to Form 10-K for 1993, File No. 0-994).

Officers’ Certificate dated June 18, 1993 creating Series B of the Company’s Unsecured Medium-Term Notes
(incorporated herein by reference to Exhibit 4f. to Form 10-K for 1993, File No. 0-994).

Officers’ Certificate dated January 17, 2003 relating to Series B of the Company’s Unsecured Medium-Term Notes
and supplementing the Officers’ Certificate dated June 18, 1993 (incorporated herein by reference to Exhibit 4f.(1) to
Form 10-K for 2002, File No. 0-994).

Form of Secured Medium-Term Notes, Series B (incorporated herein by reference to Exhibit 4.1 to Form 8-K dated
October 4, 2004, File No. 1-15973).

Form of Unsecured Medium-Term Notes, Series B (incorporated herein by reference to Exhibit 4.2 to Form 8-K dated
October 4, 2004, File No. 1-15973).

Gill Ranch Note Purchase Agreement, dated November 30, 2011, among Gill Ranch Storage, LLC and the parties 
listed thereto (incorporated herein by reference to Exhibit 4m. to Form 10-K for 2011, File No. 1-15973).

Twenty-First Supplemental Indenture, providing, among other things, for First Mortgage Bonds, 4.00% Series Due 
2042, dated as of October 15, 2012, by and between Northwest Natural Gas Company, Deutsche Bank Trust 
Company Americas (formerly known as Bankers Trust Company), and Stanley Burg (Successor to R.G. Page and 
J.C. Kennedy) (incorporated herein by reference to Exhibit 4.1 to Form 8-K dated October 26, 2012, File No.1-15973).

Form of Credit Agreement among Northwest Natural Gas Company and the parties thereto, with JPMorgan Chase 
Bank, N.A. as administrative agent and U.S. Bank, N.A. and Wells Fargo Bank, N.A. as co-syndication agents, dated 
as of December 20, 2012 (incorporated herein by reference to Exhibit 4.1 to Form 8-K dated December 20, 2012, File 
No.1-15973).

87

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
12

21

23

Statement re computation of ratios of earnings to fixed charges.

Subsidiaries of Northwest Natural Gas Company.

Consent of PricewaterhouseCoopers LLP.

31.1

Certification of Principal Executive Officer Pursuant to Rule 13a-14(a)/15-d-14(a), Section 302 of the Sarbanes-Oxley
Act of 2002.

31.2

Certification of Principal Financial Officer Pursuant to Rule 13a-14(a)/15-d-14(a), Section 302 of the Sarbanes-Oxley
Act of 2002.

32.1

Certification of Principal Executive Officer and Principal Financial Officer Pursuant to Section 906 of the Sarbanes-
Oxley Act of 2002.

Executive Compensation Plans and Arrangements:

*10b.

Executive Supplemental Retirement Income Plan 2010 Restatement (incorporated herein by reference to Exhibit 10b.
to Form 10-K for 2009, File No. 1-15973).

*10c.

Supplemental Executive Retirement Plan, effective September 1, 2004 restated 2011 (incorporated herein by
reference to Exhibit 10.1 to Form 10-Q for the quarter ended September 30, 2011, File No. 1-15973).

*10d.

Northwest Natural Gas Company Supplemental Trust, effective January 1, 2005, restated as of December 15, 2005
(incorporated herein by reference to Exhibit 10.7 to Form 8-K dated December 16, 2005, File No. 1-15973).

*10e.

Northwest Natural Gas Company Umbrella Trust for Directors, effective January 1, 1991, restated as of December 15,
2005 (incorporated herein by reference to Exhibit 10.5 to Form 8-K dated December 16, 2005, File No. 1-15973).

*10f.

Northwest Natural Gas Company Umbrella Trust for Executives, effective January 1, 1988, restated as of December
15, 2005 (incorporated herein by reference to Exhibit 10.6 to Form 8-K dated December 16, 2005, File No. 1-15973).

*10g.

Restated Stock Option Plan, as amended effective December 14, 2006 (incorporated herein by reference to Exhibit
10c. to Form 10-K for 2006, File No. 1-15973).

*10h.

Form of Restated Stock Option Plan Agreement (incorporated herein by reference to Exhibit 10h. to Form 10-K for
2009, File No. 1-15973).

*10i.

Executive Deferred Compensation Plan, effective as of January 1, 1987, restated as of February 26, 2009 
(incorporated herein by reference to Exhibit 10e. to Form 10-K for 2008, File No. 1-15973).

*10j.

Directors Deferred Compensation Plan, effective June 1, 1981, restated as of February 26, 2009 (incorporated herein 
by reference to Exhibit 10f. to Form 10-K for 2008, File No. 1-15973).

*10k.

Deferred Compensation Plan for Directors and Executives effective January 1, 2005, restated as of January 1, 2012 
(incorporated herein by reference to Exhibit 10k. to Form 10-K for 2011, File No. 1-15973).

*10l.

Form of Indemnity Agreement as entered into between the Company and each director and certain executive officers
(incorporated herein by reference to Exhibit 10l. to Form 10-K for 2009, File No. 1-15973).

*10l.(1) Form of Indemnity Agreement as entered into between the Company and certain executive officers (incorporated

herein by reference to Exhibit 10l.(1) to Form 10-K for 2009, File No. 1-15973).

88

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
*10m. Non-Employee Directors Stock Compensation Plan, as amended effective December 15, 2005 (incorporated herein

by reference to Exhibit 10.2 to Form 8-K dated December 16, 2005, File No. 1-15973).

*10n.

Executive Annual Incentive Plan, effective February 23, 2012 (incorporated herein by reference to Exhibit 10n. to 
Form 10-K for 2011, File No. 1-15973).

*10o.

Form of Agreement to Recoupment Provisions of Executive Annual Incentive Plan, effective as of January 1, 2010
(incorporated herein by reference to Exhibit 10o. to Form 10-K for 2009, File No. 1-15973).

*10p.

Form of Change in Control Severance Agreement between the Company and each executive officer (incorporated
herein by reference to Exhibit 10o. to Form 10-K for 2008, File No. 1-15973).

*10q.

Severance agreement dated December 19, 2008 between the Company and Gregg S. Kantor (incorporated herein by
reference to Exhibit 10.1 to Form 8-K dated December 23, 2008, File No. 1-15973).

10r.

Northwest Natural Gas Company Long-Term Incentive Plan, as amended and restated effective May 24, 2012.

*10s.

Form of Long-Term Incentive Award Agreement under the Long-Term Incentive Plan (2010-2012) (incorporated herein 
by reference to Exhibit 10t. to Form 10-K for 2011, File No. 1-15973).

*10t.

Form of Long-Term Incentive Award Agreement under the Long-Term Incentive Plan (2011-2013) (incorporated herein 
by reference to Exhibit 10u. to Form 10-K for 2011, File No. 1-15973).

*10u.

Form of Long-Term Incentive Award Agreement under the Long-Term Incentive Plan (2012-2014) (incorporated herein 
by reference to Exhibit 10v. to Form 10-K for 2011, File No. 1-15973).

10v.

Form of Long-Term Incentive Award Agreement under the Long-Term Incentive Plan (2013-2015).

*10w.

Form of Consent dated December 14, 2006 entered into by each executive officer (incorporated herein by reference
to Exhibit 10.1 to Form 8-K dated December 19, 2006, File No. 1-15973).

*10x.

Consent to Amendment of Deferred Compensation Plan for Directors and Executives, dated February 28, 2008 
entered into by each executive officer (incorporated herein by reference to Exhibit 10bb to Form 10-K for 2007, File 
No. 1-15973).

*10y.

Form of Long-Term Incentive Award Agreement under the Long-Term Incentive Plan relating to a special award to an
executive officer (incorporated herein by reference to Exhibit 10z. to Form 10-K for 2009, File No. 1-15973).

10aa.

Form of Restricted Stock Unit Award Agreement under the Long-Term Incentive Plan (2013).

*10bb. Form of Restricted Stock Unit Award Agreement under the Long-Term Incentive Plan (2012) (incorporated herein by 

reference to Exhibit 10.1 to Form 8-K dated December 14, 2011, File No. 1-15973).

10cc.

Annual Incentive Plan for NW Natural Gas Storage, LLC, as amended February 2, 2012.

10dd.

Long Term Incentive Plan for NW Natural Gas Storage, LLC.

10ee.

Form of Change in Control Severance Agreement between the Company and an executive officer.

101.

The following materials from Northwest Natural Gas Company Annual Report on Form 10-K for the fiscal year ended 
December 31, 2012, formatted in Extensible Business Reporting Language (XBRL):

(i) Consolidated Statements of Income;
(ii) Consolidated Balance Sheets;
(iii) Consolidated Statements of Cash Flows; and
(iv) Related notes.

 *Incorporated herein by reference as indicated

89

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
NORTHWEST NATURAL GAS COMPANY 
Ratios of Earnings to Fixed Charges 
(Unaudited)

EXHIBIT 12

In thousands, except share data

Fixed Charges, as defined:

Interest on Long-Term Debt
Other Interest
Amortization of Debt Discount and Expense
Interest Portion of Rentals
Total Fixed Charges, as defined

Earnings, as defined:

Net Income
Taxes on Income
Fixed Charges, as above
Total Earnings, as defined

Ratios of Earnings to Fixed Charges

Year Ended December 31,

2012

2011

2010

2009

2008

$

$

$

39,175
2,314
1,848
1,864
45,201

37,515
2,976
1,729
2,213
44,433

$

39,198
1,587
1,766
2,130
44,681

$

37,447
1,937
1,503
1,735
42,622

33,605
4,022
700
1,551
39,878

59,855
44,104
45,201
$ 149,160
3.30

63,898
43,382
44,433
$ 151,713
3.41

72,667
49,462
44,681
$ 166,810
3.73

75,122
46,671
42,622
$ 164,415
3.86

69,525
40,678
39,878
$ 150,081
3.76

90

CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

EXHIBIT 23

We hereby consent to the incorporation by reference in the Registration Statements on Form S-8 (Nos. 333-70218, 333-100885, 
333-120955, 333-134973, 333-139819 and 333-180350) and in the Registration Statement on Form S-3 (No. 333-171596) of 
Northwest Natural Gas Company of our report dated March 1, 2013 relating to the consolidated financial statements, financial 
statement schedule and the effectiveness of internal control over financial reporting, which appears in this Form 10-K.

/s/ PricewaterhouseCoopers LLP

Portland, Oregon
March 1, 2013 

91

CERTIFICATION

I, Gregg S. Kantor, certify that:

EXHIBIT 31.1

1.           I have reviewed this annual report on Form 10-K of Northwest Natural Gas Company;

2.           Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material 
fact necessary to make the statements made, in light of the circumstances under which such statements were made, not 
misleading with respect to the period covered by this report;

3.           Based on my knowledge, the financial statements, and other financial information included in this report, fairly present 
in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods 
presented in this report;

4.           The registrant’s other certifying officer and I are responsible for establishing and maintaining disclosure controls and 
procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined 
in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have:

(a) Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under 
our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made 
known to us by others within those entities, particularly during the period in which this report is being prepared;

(b) Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed 
under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of 
financial statements for external purposes in accordance with generally accepted accounting principles;

(c) Evaluated the effectiveness of the registrant’s disclosure controls and procedures and presented in this report our 
conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report 
based on such evaluation; and

(d) Disclosed in this report any change in the registrant’s internal control over financial reporting that occurred during the 
registrant’s most recent fiscal quarter (the registrant’s fourth fiscal quarter in the case of an annual report) that has materially 
affected, or is reasonably likely to materially affect, the registrant’s internal control over financial reporting; and

5.           The registrant’s other certifying officer and I have disclosed, based on our most recent evaluation of internal control over 
financial reporting, to the registrant’s auditors and the audit committee of the registrant’s board of directors (or persons 
performing the equivalent functions):

(a) All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting 
which are reasonably likely to adversely affect the registrant’s ability to record, process, summarize and report financial 
information; and

(b) Any fraud, whether or not material, that involves management or other employees who have a significant role in the 
registrant’s internal control over financial reporting.

Date:          March 1, 2013 

/s/ Gregg S. Kantor                                                   
Gregg S. Kantor
President and Chief Executive Officer

92

CERTIFICATION

I, Stephen P. Feltz, certify that:

EXHIBIT 31.2

1.           I have reviewed this annual report on Form 10-K for Northwest Natural Gas Company;

2.           Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material 
fact necessary to make the statements made, in light of the circumstances under which such statements were made, not 
misleading with respect to the period covered by this report;

3.           Based on my knowledge, the financial statements, and other financial information included in this report, fairly present 
in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods 
presented in this report;

4.           The registrant’s other certifying officer and I are responsible for establishing and maintaining disclosure controls and 
procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined 
in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have:

(a) Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under 
our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made 
known to us by others within those entities, particularly during the period in which this report is being prepared;

(b) Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed 
under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of 
financial statements for external purposes in accordance with generally accepted accounting principles;

(c) Evaluated the effectiveness of the registrant’s disclosure controls and procedures and presented in this report our 
conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report 
based on such evaluation; and

(d) Disclosed in this report any change in the registrant’s internal control over financial reporting that occurred during the 
registrant’s most recent fiscal quarter (the registrant’s fourth fiscal quarter in the case of an annual report) that has materially 
affected, or is reasonably likely to materially affect, the registrant’s internal control over financial reporting; and

5.           The registrant’s other certifying officer and I have disclosed, based on our most recent evaluation of internal control over 
financial reporting, to the registrant’s auditors and the audit committee of the registrant’s board of directors (or persons 
performing the equivalent functions):

(a) All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting 
which are reasonably likely to adversely affect the registrant’s ability to record, process, summarize and report financial 
information; and

(b) Any fraud, whether or not material, that involves management or other employees who have a significant role in the 
registrant’s internal control over financial reporting.

Date:          March 1, 2013 

/s/ Stephen P. Feltz                                                                
Stephen P. Feltz
Senior Vice President and Chief Financial Officer

93

NORTHWEST NATURAL GAS COMPANY
Certificate Pursuant to Section 906
of Sarbanes – Oxley Act of 2002

EXHIBIT 32.1

Each of the undersigned, GREGG S. KANTOR, the President and Chief Executive Officer, and STEPHEN P. FELTZ, the Senior 
Vice President and Chief Financial Officer, of NORTHWEST NATURAL GAS COMPANY (the Company), DOES HEREBY 
CERTIFY that:

1.           The Company’s Annual Report on Form 10-K for the year ended December 31, 2012 (the Report) fully complies with 
the requirements of section 13(a) or 15(d) of the Securities Exchange Act of 1934, as amended; and

2.           Information contained in the Report fairly presents, in all material respects, the financial condition and results of 
operations of the Company.

IN WITNESS WHEREOF, each of the undersigned has caused this instrument to be executed this 1st day of March 

2013.

/s/ Gregg S. Kantor                                                      
Gregg S. Kantor
President and Chief Executive Officer

/s/ Stephen P. Feltz                                                         
Stephen P. Feltz
Senior Vice President and
Chief Financial Officer

A signed original of this written statement required by Section 906 of the Sarbanes-Oxley Act of 2002 has been provided to 
Northwest Natural Gas Company and will be retained by Northwest Natural Gas Company and furnished to the Securities and 
Exchange Commission or its staff upon request.

94

 
 
 
[THIS PAGE INTENTIONALLY LEFT BLANK]

Corporate iNformatioN

inveStor & ShAreholder inFormAtion

robert hess

Director, Investor Relations 

(800) 422-4012, Ext. 2388 

rsh@nwnatural.com

chu lee

Manager, Shareholder Services 

(800) 422-4012, Ext. 3412 

c4l@nwnatural.com

Stock trAnSFer Agent  
And regiStrAr

truStee And bond pAying Agent 

For all bond issues:

For the common stock:

Deutsche Bank Trust Company Americas

American Stock Transfer & Trust Company

60 Wall Street

6201 15th Avenue

Brooklyn, NY 11219

(888) 777-0321

web: amstock.com 

email: info@amstock.com

New York, NY 10005

(800) 735-7777

community And SuStAinAbility 
report

low-income weAtherizAtion 
progrAm

energy-eFFiciency progrAmS

NW Natural partners with Energy Trust of 

Learn more about NW Natural’s community 

NW Natural offers a program to our low- 

Oregon to offer our Oregon and Washington 

involvement and philanthropic contributions, 

income customers designed to reduce their 

customers energy-efficiency programs and 

environmental stewardship, employee safety 

natural gas use through the installation of  

services. Learn more about the results of 

efforts and other company initiatives. 

energy-efficient equipment and weather-

these programs and the benefits to our 

View the Community & Sustainability  

innovative Oregon program. 

Annual Report at nwnatural.com/ 

View the Energy Trust of Oregon  

aboutnwnatural/community

View the Low-Income Energy-Efficiency  

Annual Report at nwnatural.com/ 

ization measures. Find out more about this 

customers. 

Program Annual Report at nwnatural.com/ 

aboutnwnatural/environmentalstewardship

aboutnwnatural/environmentalstewardship

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220 NW Second Avenue 
Portland, Oregon 97209

nwnatural.com

NYSE: NWN