UNITED STATES SECURITIES AND EXCHANGE COMMISSION

Washington, DC 20549

Form 10-K

(Mark One)

þ		ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

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

Commission file number 001-33917

Williams Pipeline Partners L.P.

Delaware (State or Other Jurisdiction of Incorporation or Organization)		26-0834035 (IRS Employer Identification No.)
One Williams Center, Tulsa, Oklahoma (Address of Principal Executive Offices)		74172-0172 (Zip Code)

918-573-2000
(Registrant’s telephone number, including area code)

Title of Each Class		Name of Each Exchange on Which Registered
Common Units		New York Stock Exchange

Securities registered pursuant to Section 12(g) of the Act:
None
(Title of Class)

     Indicate by check mark if the registrant is a well-known seasoned issuer, as defined in Rule 405 of the Securities Act. Yes o     No þ

     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 o     No þ

     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 þ     No o

     Indicate by check mark whether the registrant has submitted electronically and posted on its corporate Website, 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 submitted and post such files.) Yes o     No o

     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. þ

     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 o

Accelerated filer þ

Non-accelerated filer o (Do not check if a smaller reporting company)

Smaller reporting company o

     Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Exchange Act). Yes o     No þ

     The aggregate market value of the registrant’s common units held by non-affiliates based on the closing sale price of such units as reported on the New York Stock Exchange, as of the last day of the registrant’s most recently completed second quarter was approximately $407,362,588. This figure excludes common units beneficially owned by the directors and executive officers of Williams Pipeline GP LLC, our general partner.

     The registrant had 22,607,430 common units and 10,957,900 subordinated units outstanding as of February 17, 2010.

None

 

 

WILLIAMS PIPELINE PARTNERS L.P.

FORM 10-K

TABLE OF CONTENTS

Heading				Page
		PART I
Item 1.		Business			4
Item 1A.		Risk Factors			12
Item 1B.		Unresolved Staff Comments			36
Item 2.		Properties			36
Item 3.		Legal Proceedings			36
Item 4.		Submission of Matters to a Vote of Security Holders			36
		PART II
Item 5.		Market for Registrant’s Common Equity, Related Stockholder Matters and Issuer Purchase of Equity Securities			37
Item 6.		Selected Financial Data			40
Item 7.		Management’s Discussion and Analysis of Financial Condition and Results of Operations			41
Item 7A.		Quantitative and Qualitative Disclosures about Market Risk			55
Item 8.		Financial Statements and Supplementary Data			57
Item 9.		Changes in and Disagreements with Accountants on Accounting and Financial Disclosure			95
Item 9A.		Controls and Procedures			95
Item 9B.		Other Information			95
		PART III
Item 10.		Directors, Executive Officers and Corporate Governance			96
Item 11.		Executive Compensation			102
Item 12.		Security Ownership of Certain Beneficial Owners and Management and Related Stockholder Matters			105
Item 13.		Certain Relationships and Related Transactions and Director Independence			108
Item 14.		Principal Accounting Fees and Services			115
		PART IV
Item 15.		Exhibits, Financial Statement Schedules			116
EX-21.1
EX-23.1
EX-24.1
EX-31.1
EX-31.2
EX-32

DEFINTIONS

     We use the following oil and gas measurements in this report. All volumes of natural gas are stated at a pressure base of 14.73 pounds per square inch absolute at 60 degrees Fahrenheit.

     “Mcf” means thousand cubic feet.

     “MMcf” means million cubic feet.

     “Bcf” means billion cubic feet.

     “MMBtu” means one million British Thermal Units.

     “TBtu” means one trillion British Thermal Units.

     “Dth” means one dekatherm, which is equal to one MMBtu.

     “MDth” means thousand dekatherms.

     “MMDth” means million dekatherms.

WILLIAMS PIPELINE PARTNERS L.P.

FORM 10-K

PART I

Item 1. Business

     Unless the context clearly indicates otherwise, references in this report to “we,” “our,” “us,” or like terms refer to Williams Pipeline Partners L.P. and its subsidiaries. Unless the context clearly indicates otherwise, references to “we,” “our,” and “us” include the operations of Northwest Pipeline GP (“Northwest”), in which we own a 35 percent interest. When we refer to Northwest by name, we are referring exclusively to Northwest Pipeline GP and its consolidated affiliate, Northwest Pipeline Services LLC.

WEBSITE ACCESS TO REPORTS AND OTHER INFORMATION

     We file our annual report on Form 10-K, quarterly reports on Form 10-Q, current reports on Form 8-K and other documents electronically with the U.S. Securities and Exchange Commission (“SEC”) under the Securities Exchange Act of 1934, as amended. From time-to-time, we may also file registration and related statements pertaining to equity or debt offerings. You may read and copy any materials that we file with the SEC at the SEC’s Public Reference Room at 100 F Street, NE, Washington, DC 20549. You may obtain information on the operation of the Public Reference Room by calling the SEC at 1-800-SEC-0330. You may also obtain such reports from the SEC’s Internet website at http://www.sec.gov.

     We make available free of charge on or through our Internet website at http://www.williamspipelinepartners.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) of the Exchange Act as soon as reasonably practicable after we electronically file such material with, or furnish it to, the SEC. Our Corporate Governance Guidelines, Code of Business Conduct and Ethics and the charter of the audit committee of our general partner’s board of directors are also available on our Internet website. We will also provide, free of charge, a copy of any of our governance documents listed above upon written request to our general partner’s corporate secretary at Williams Pipeline Partners L.P., One Williams Center, Suite 4700, Tulsa, Oklahoma 74172.

     Our principal executive offices are located at One Williams Center, Tulsa, Oklahoma 74172. Our telephone number is 918-573-2000.

GENERAL

     We are a Delaware limited partnership formed on August 31, 2007 by The Williams Companies, Inc. (“Williams”) to own and operate natural gas transportation and storage assets. Our primary business objectives are to generate stable cash flows and, over time, to increase our quarterly cash distributions per unit. We own a 35 percent general partnership interest in Northwest, which owns and operates an approximately 3,900-mile, bi-directional, interstate natural gas pipeline system that extends from the San Juan Basin in New Mexico, through the Rocky Mountains and to the northwestern United States. Northwest also has working natural gas storage capacity of approximately 13.0 billion cubic feet, or Bcf. We account for our 35 percent interest in Northwest as an equity investment, and, therefore, do not consolidate its financial results.

     The 35 percent of Northwest owned by us was owned by Williams prior to the initial public offering (“IPO”) of our common units in January 2008. As of December 31, 2009, Williams indirectly owned an approximate 45.7 percent limited partner interest in us and all of our 2 percent general partner interest.

     Williams is an integrated energy company with 2009 revenues in excess of $8.2 billion that trades on the New York Stock Exchange under the symbol “WMB.” Williams operates in numerous aspects of the energy industry, including natural gas exploration and production, midstream services, and interstate natural gas transportation. Williams has owned or operated interstate natural gas transportation and storage assets for more than 25 years.

Recent Developments

     On February 17, 2010, Williams completed a strategic restructuring to contribute certain of its midstream and pipeline assets, including its 45.7 percent limited partner interest in us, its 100 percent ownership interest in our general partner, and its 65 percent interest in Northwest to Williams Partners L.P. (“Williams Partners”), an affiliate of Williams and of us, in exchange for cash and units in Williams Partners (the “Dropdown”). As part of the strategic restructuring, Williams Partners announced its intention to commence an exchange offer for any and all of our outstanding common units not held by Williams Partners or its affiliates at a future date following the consummation of the Dropdown. The exact timing of the launch of such offer was stated to be dependent on the filing of necessary documentation with the SEC and upon market conditions, but it was announced that it would be at a fixed exchange ratio of 0.7584 of its common units for each our common units.

FINANCIAL INFORMATION ABOUT SEGMENTS

     See Part II, Item 8. Financial Statements and Supplementary Data.

NARRATIVE DESCRIPTION OF BUSINESS

     Our general partnership interest in Northwest is our primary asset. As a result, we are dependent on Northwest for substantially all of our cash available for distribution and the narrative description of business is primarily focused on Northwest.

Northwest’s System

     Northwest is an interstate natural gas transportation company that owns and operates a natural gas pipeline system extending from the San Juan Basin in northwestern New Mexico and southwestern Colorado through the states of Colorado, Utah, Wyoming, Idaho, Oregon and Washington to a point on the Canadian border near Sumas, Washington. Northwest provides natural gas transportation services for markets in Washington, Oregon, Idaho, Wyoming, Nevada, Utah, Colorado, New Mexico, California and Arizona, either directly or indirectly through interconnections with other pipelines. Northwest’s principal business is the interstate transportation of natural gas, which is regulated by the Federal Energy Regulatory Commission (“FERC”).

     Northwest’s system includes approximately 3,900 miles of mainline and lateral transmission pipeline and 41 transmission compressor stations. Its compression facilities have a combined sea level-rated capacity of approximately 473,000 horsepower. At December 31, 2009, Northwest had long-term firm transportation contracts, including peaking service, with aggregate capacity reservations of approximately 3.7 Bcf of natural gas per day.

     Northwest has access to multiple strategic natural gas supply basins, including basins in the Rocky Mountain region, the San Juan Basin and the Western Canadian Sedimentary Basin (“WCSB”). Northwest is the only interstate natural gas pipeline that currently provides service to certain key markets, including Seattle, Washington; Portland, Oregon; and Boise, Idaho. In addition Northwest believes it provides competitively priced services in markets such as Reno, Nevada; Spokane, Washington; and Medford, Oregon that are also served by other interstate natural gas pipelines.

     Northwest transports and stores natural gas for a broad mix of customers, including local natural gas distribution companies, municipal utilities, direct industrial users, electric power generators and natural gas marketers and producers. Northwest’s firm transportation and storage contracts are generally long-term contracts with various expiration dates and account for the major portion of its business. Additionally, Northwest offers interruptible and short-term firm transportation services. During 2009, Northwest served a total of 129 transportation and storage customers. Northwest’s two largest customers were Puget Sound Energy, Inc. and Northwest Natural Gas Company, which accounted for approximately 21.8 percent and 11.3 percent, respectively, of its total operating revenues for the year ended December 31, 2009. No other customer accounted for more than 10 percent of Northwest’s total operating revenues during that period.

Northwest’s Transportation and Storage Services

     Northwest’s rates are subject to the rate-making policies of FERC. Northwest provides a significant portion of its transportation and storage services pursuant to long-term firm contracts that obligate its customers to pay it monthly capacity reservation fees, which are fees that are owed for reserving an agreed upon amount of pipeline or storage capacity regardless of the amount of pipeline or storage capacity actually utilized by a customer. When a customer utilizes the capacity it has reserved under a firm transportation contract, Northwest also collects a volumetric fee based on the quantity of natural gas transported. These volumetric fees are typically a small

percentage of the total fees received under a firm contract. Northwest also derives a small portion of its revenues from short-term firm and interruptible contracts under which customers pay fees for transportation, storage and other related services. The high percentage of Northwest’s revenue derived from capacity reservation fees helps mitigate the risk of revenue fluctuations caused by changing supply and demand conditions.

     Northwest has approximately 13.0 Bcf of working natural gas storage capacity through the following three storage facilities. These natural gas storage facilities enable Northwest to balance daily receipts and deliveries and provide storage services to certain major customers.

	•		Jackson Prairie: Northwest owns a one-third interest in the Jackson Prairie underground storage facility located near Chehalis, Washington, with the remaining interests owned by two of its distribution customers. As of December 31, 2009, Northwest’s share of the firm seasonal storage service in this facility was approximately 7.7 Bcf of working natural gas storage capacity and up to 383 MMcf per day of peak day deliveries. Additionally, Northwest’s share of the best-efforts delivery capacity was 50 MMcf per day. As described below, Northwest is participating in an ongoing expansion of Jackson Prairie.
	•		Plymouth LNG: Northwest also owns and operates a Liquefied Natural Gas (“LNG”) storage facility located near Plymouth, Washington, which provides standby service for its customers during extreme peaks in demand. The facility has a total LNG storage capacity equivalent to 2.3 Bcf of working natural gas, liquefaction capability of 12 MMcf per day and regasification capability of 300 MMcf per day. Certain of Northwest’s major customers own the working natural gas stored at the LNG plant.
	•		Clay Basin Field: Northwest has a contract with a third party under which Northwest contracts for natural gas storage services in an underground storage reservoir in the Clay Basin Field located in Daggett County, Utah. Northwest is authorized to utilize the Clay Basin Field at a seasonal storage level of 3.0 Bcf of working natural gas, with a firm delivery capability of 25 MMcf of natural gas per day.

Northwest’s Competition

     Northwest believes the topography of the Pacific Northwest makes construction of competing pipelines difficult and expensive and it forms a natural barrier to entry for potential competitor pipelines in Northwest’s primary markets such as Seattle, Washington; Portland, Oregon; and Boise, Idaho. Northwest’s pipeline is currently the sole source of interstate natural gas transportation in many of the markets it serves. However, there are a number of factors that could increase competition in Northwest’s traditional market area. For example, customers may consider such factors as cost of service and rates, location, reliability, available capacity, flow characteristics, pipeline service offerings, supply abundance and diversity, and storage access when analyzing competitive pipeline options.

     Competition could arise from new ventures or expanded operations from existing competitors. For example, in late 2006, Northwest Natural Gas Co. (“Northwest Natural”), Northwest’s second largest customer, announced that it is partnering with TransCanada’s Gas Transmission Northwest (“GTN”) to build the Palomar Gas Transmission project. This proposed project would consist of a greenfield pipeline from GTN’s system in central Oregon to Northwest Natural’s system in western Oregon. Palomar could also be used to transport natural gas from one of the proposed Columbia River LNG terminals back to GTN’s system.

     Northwest is also experiencing increased competition for domestic supply with the completion of projects such as Kinder Morgan’s Rockies Express and Wyoming Interstate’s Kanda Lateral, which are designed to transport natural gas produced in the Piceance and Uinta Basins to Midwestern and Eastern markets. El Paso Corporation has proposed a new pipeline project, called Ruby, which would begin at the Opal Hub in Wyoming and terminate in Malin, Oregon, near the California border, to create additional access to Rocky Mountain gas in western markets.

     Natural gas also competes with other forms of energy available to Northwest’s customers, including electricity, coal, fuel oils and other alternative energy sources. A shift from natural gas to other forms of energy could cause a decrease in use of Northwest’s storage and transportation services.

     In addition, FERC’s continuing efforts to promote competition in the natural gas industry have increased the number of service options available to shippers in the secondary market. As a result, Northwest’s customers’ capacity release and capacity segmentation activities have created an active secondary market which competes with Northwest’s pipeline services. Some customers see this as a benefit because it allows them to effectively reduce the cost of their capacity reservation fees.

Northwest’s Supply and Demand Dynamics

     To effectively manage its business, Northwest monitors its market areas for both short-term and long-term shifts in natural gas supply and demand. Changes in natural gas supply such as new discoveries of natural gas reserves, declining production in older fields, and the introduction of new sources of natural gas supply, such as imported LNG, directly or indirectly affect the demand for Northwest’s services from both producers and consumers. For example, western U.S. production levels are growing rapidly, but a large portion of the new production of natural gas from the Rocky Mountain region will be delivered to markets in the mid-continent and eastern U.S. through projects like the Rockies Express Pipeline. Canadian production levels, on the other hand, are in a flat to downward trend and exports to U.S. markets are declining. However, recent U.S. and Canadian shale gas discoveries and related technological advancements may impact future North American natural gas flow patterns. As these supply dynamics shift, Northwest anticipates that it will continue to actively pursue projects that link new sources of supply to customers willing to contract for transportation on a long-term firm basis. Changes in demographics, the amount of electricity generation, prevailing weather conditions, and shifts in residential and commercial usage affect Northwest’s customers’ overall demand for natural gas. As customer demand dynamics change, Northwest anticipates that it will create new services or capacity arrangements that meet their long-term requirements.

Northwest’s Customers

     Northwest transports and stores natural gas for a broad mix of customers, including local natural gas distribution companies (“LDCs”), municipal utilities, direct industrial users, electric utilities and independent power generators and natural gas marketers and producers. Northwest provides natural gas transportation services for markets in Washington, Oregon, Idaho, Wyoming, Nevada, Utah, Colorado, New Mexico, California and Arizona, either directly or indirectly through interconnections with other pipelines. Northwest’s customers use its transportation and storage services for a variety of reasons. Natural gas distribution companies and electric generation companies typically require a secure and reliable supply of natural gas over a prolonged period of time to meet the needs of their customers and frequently enter into long-term firm transportation and storage contracts to ensure both a ready supply of natural gas and sufficient transportation capacity over the life of the contract. Producers of natural gas require the ability to deliver their product to market and frequently enter into firm transportation contracts to ensure that they will have sufficient capacity available to deliver their product to delivery points with greater market liquidity. Natural gas marketers use storage and transportation services to capitalize on price differentials over time or between markets. Northwest’s customer mix can vary over time and largely depends on the natural gas supply and demand dynamics in its markets.

Northwest’s Capital Projects

     The pipeline projects listed below were completed during 2009 or are significant future pipeline projects for which Northwest has significant customer commitments.

Colorado Hub Connection Project

     On November 10, 2009, Northwest placed into service the new 27-mile, 24-inch diameter lateral referred to as the Colorado Hub Connection Project (“CHC Project”). The new lateral connects the Meeker/White River Hub near Meeker, Colorado to Northwest’s mainline south of Rangely, Colorado, and is estimated to cost up to $60 million.

     The CHC Project combined the new lateral capacity with existing mainline capacity to provide approximately 363 MDth per day of firm transportation from various receipt points to delivery points on the mainline as far south as Ignacio, Colorado. Approximately 243 MDth per day of the capacity was originally held by Pan-Alberta Gas under a contract that would have terminated on October 31, 2012 and approximately 98 MDth per day was previously sold on a short-term basis.

     In addition to providing greater opportunity for contract extensions for the short-term firm and Pan-Alberta capacity, the CHC Project provides direct access to additional natural gas supplies at the Meeker/White River Hub in the Piceance Basin for Northwest’s on-system and off-system markets. Northwest has entered into transportation agreements for approximately 363 MDth per day of capacity with terms ranging between eight and fifteen years at maximum rates for all of the short-term firm and Pan-Alberta capacity resulting in the successful re-contracting of the capacity out to 2018 and beyond. In April 2009, FERC issued a certificate approving the CHC Project, including the presumption of rolling in the costs of the project in any future rate case filed with the FERC.

Jackson Prairie Underground Expansion

     The Jackson Prairie Storage Project, connected to Northwest’s transmission system near Chehalis, Washington, is operated by Puget Sound Energy and is jointly owned by Northwest, Puget Sound Energy and Avista Corporation. A phased capacity expansion is currently underway and a deliverability expansion was placed in service on November 1, 2008.

     As a one-third owner of Jackson Prairie, in early 2006, Northwest held an open season for a new firm storage service based on its 100 MMcf per day share of the planned 2008 deliverability expansion and approximately 1.2 Bcf of its share of the working natural gas storage capacity expansion to be developed over approximately a six-year period from 2007 through 2012.

     As a result of the open season, four shippers have executed long-term service agreements for the full amount of incremental storage service offered at contract terms averaging 33 years. The firm service relating to storage capacity rights will be phased-in as the expanded working natural gas capacity is developed. Northwest’s one-third share of the deliverability expansion was placed in service on November 1, 2008 at a cost of approximately $16.0 million. Northwest’s estimated capital cost for the capacity expansion component of the new storage service is $6.1 million, primarily for base natural gas.

Sundance Trail Expansion

     In November 2009, Northwest received approval from FERC to construct approximately 16 miles of 30-inch loop between its existing Green River and Muddy Creek compressor stations in Wyoming as well as an upgrade to its existing Vernal compressor station, with service targeted to commence in November 2010. The total project is estimated to cost up to $65 million, including the cost of replacing the existing compression at Vernal, which will enhance the efficiency of Northwest’s system. Northwest executed a precedent agreement to provide 150 MDth per day of firm transportation service from the Greasewood and Meeker Hubs in Colorado for delivery to the Opal Hub in Wyoming. Northwest has proposed to collect its maximum system rates, and has received approval from FERC to roll-in the Sundance Trail Expansion costs in any future rate cases.

Regulatory Matters

FERC Regulation

     Northwest’s interstate pipeline system and storage facilities are subject to extensive regulation by FERC. FERC has jurisdiction with respect to virtually all aspects of Northwest’s business, including generally:

	•		transportation and storage of natural gas;
	•		rates and charges;
	•		terms of service including creditworthiness requirements;
	•		construction of new facilities;
	•		extension or abandonment of service and facilities;
	•		accounts and records;
	•		depreciation and amortization policies;
	•		relationships with gas marketing functions within Williams; and
	•		initiation and discontinuation of services.

     Northwest holds certificates of public convenience and necessity issued by FERC pursuant to Section 7 of the Natural Gas Act of 1938 (“NGA”) covering its facilities, activities and services. Northwest may not unduly discriminate in providing open access, available transportation and storage services to customers qualifying under Northwest’s tariff provisions. Under Section 8 of the NGA, FERC has the power to prescribe the accounting treatment of items for regulatory purposes. The books and records of interstate pipelines may be periodically audited by FERC.

     FERC regulates the rates and charges for transportation and storage in interstate commerce. Interstate pipelines may not charge rates that have been determined not to be just and reasonable.

     The maximum recourse rates that may be charged by interstate pipelines for their services are established through FERC’s ratemaking process. Generally, the maximum filed recourse rates for interstate pipelines are based on the cost of service including recovery of and a return on the pipeline’s actual prudent historical cost investment. Key determinants in the ratemaking process are level of plant investment and costs of providing service, allowed rate of return and volume throughput and contractual capacity commitments. The maximum applicable recourse rates and terms and conditions for service are set forth in each pipeline’s FERC-approved tariff or established by reference to FERC’s regulations. Rate design and the allocation of costs also can impact a pipeline’s profitability. Interstate pipelines are permitted to discount their firm and interruptible rates without further FERC authorization down to the variable cost of performing service, provided they do not “unduly discriminate.”

     Interstate pipelines may also use “negotiated rates” which, in theory, could involve rates above or below the “recourse rate,” provided the affected customers are willing to agree to such rates. A prerequisite for having the right to agree to negotiated rates is that negotiated rate customers must have had the option to take service under the pipeline’s maximum recourse rates.

     In May 2005, FERC issued a statement of general policy, permitting a pipeline to include in cost-of-service computations an income tax allowance provided that an entity or individual has an actual or potential income tax liability on income from the pipeline’s public utility assets. Whether a pipeline’s owners have such actual or potential income tax liability will be reviewed by FERC on a case-by-case basis.

     In a 2007 proposed policy statement, FERC proposed to permit inclusion of publicly traded partnerships in the proxy group analysis relating to return on equity determinations in rate proceedings, provided that the analysis be limited to actual publicly traded partnership distributions capped at the level of the pipeline’s earnings. In 2008, FERC issued a final policy statement which rejected the concept of capping distributions in favor of an adjustment to the long-term growth rate used to calculate the equity cost of capital for publicly traded partnerships which are included in the proxy group. The effect of the application of FERC’s policy to Northwest’s future rate proceedings is not certain and Northwest cannot ensure that such application would not adversely affect its ability to achieve a reasonable level of return on equity.

     Pursuant to Northwest’s March 30, 2007 rate settlement, Northwest is required to file a new rate case to be effective no later than January 1, 2013.

Energy Policy Act of 2005

     On August 8, 2005, Congress enacted the Energy Policy Act of 2005 (“EP Act 2005”). Among other matters, EP Act 2005 amends the NGA to add an anti-manipulation provision that makes it unlawful for any entity to engage in prohibited behavior in contravention of rules and regulations prescribed by FERC and provides FERC with additional civil penalty authority. On January 19, 2006, FERC issued Order No. 670, a rule implementing the anti-manipulation provision of EP Act 2005, and subsequently denied rehearing of that order. The rule makes it unlawful in connection with the purchase or sale of natural gas subject to the jurisdiction of FERC, or the purchase or sale of transportation services subject to the jurisdiction of FERC, for any entity, directly or indirectly, (i) to use or employ any device, scheme or artifice to defraud; (ii) to make any untrue statement of material fact or omit to make any such statement necessary to make the statements made not misleading; or (iii) to engage in any act or practice that operates as a fraud or deceit upon any person. The new anti-manipulation rule does not apply to activities that relate only to intrastate or other non-jurisdictional sales or gathering, but does apply to activities of natural gas pipelines and storage companies that provide interstate services, as well as otherwise non-jurisdictional entities to the extent the activities are conducted “in connection with” natural gas sales, purchases or transportation subject to FERC jurisdiction. The EP Act 2005 also amends the NGA and the Natural Gas Policy Act to give FERC authority to impose civil penalties for violations of the NGA up to $1,000,000 per day per violation for violations occurring after August 8, 2005. In connection with this enhanced civil penalty authority, FERC issued a policy statement on enforcement to provide guidance regarding the enforcement of the statutes, orders, rules and regulations it administers, including factors to be considered in determining the appropriate enforcement action to be taken. The anti-manipulation rule and enhanced civil penalty authority reflect an expansion of FERC’s enforcement authority. Additional proposals and proceedings that might affect the natural gas industry are pending before Congress, FERC and the courts.

Safety and Maintenance

     Northwest is subject to regulation by the United States Department of Transportation (“DOT”) Pipeline and Hazardous Materials Safety Administration (“PHMSA”), pursuant to the Natural Gas Pipeline Safety Act of 1968 (“NGPSA”) and the Pipeline Safety Improvement Act of 2002, which was reauthorized and amended by the Pipeline Inspection, Protection, Enforcement, and Safety Act of 2006. The NGPSA regulates safety requirements in the design, construction, operation and maintenance of natural gas pipeline facilities while the Pipeline Safety Improvement Act of 2002 establishes mandatory inspections for all United States oil and natural gas transportation pipelines, and some gathering lines in high consequence areas. PHMSA regulations implementing the Pipeline Safety Improvement Act of 2002 require pipeline operators to implement integrity management programs, which involve frequent inspections and other measures to ensure pipeline safety in “high consequence areas,” such as high population areas, areas unusually sensitive to environmental damage, and commercially navigable waterways. The PHMSA may assess fines and penalties for violations of these and other requirements imposed by its regulations.

     States are largely preempted by federal law from regulating pipeline safety for interstate lines but some are certified by DOT to assume responsibility for inspection and enforcement of federal natural gas pipeline safety regulations. In practice, because states can adopt stricter standards for intrastate pipelines than those imposed by the federal government for interstate lines, states vary considerably in their authority and capacity to address pipeline safety. Northwest’s natural gas pipeline has inspection and compliance programs designed to maintain compliance with federal and applicable state pipeline safety and pollution control requirements.

     Northwest is subject to a number of federal laws and regulations, including the federal Occupational Safety and Health Act (“OSHA”), and some comparable state statutes, whose purpose is to protect the health and safety of workers, both generally and within the pipeline industry. The OSHA hazard communication standard, the U.S. Environmental Protection Agency (“EPA”) community right-to-know regulations under Title III of the federal Superfund Amendment and Reauthorization Act, and comparable state statutes, require that information be maintained concerning hazardous materials used or produced in operations and that this information be provided to employees, state and local government authorities, and citizens.

Environmental Regulation

     General. Northwest’s natural gas transportation and storage operations are subject to extensive and complex federal, state and local laws and regulations governing the discharge of materials into the environment or otherwise relating to environmental protection. These laws and regulations may impose numerous obligations that are applicable to Northwest’s operations, including:

	•		requiring the acquisition of permits to conduct regulated activities;
	•		restricting the manner in which Northwest can release materials into the environment;
	•		imposing investigatory and remedial obligations to mitigate pollution from former or current operations;
	•		assessing administrative, civil, and criminal penalties for failure to comply with applicable legal requirements; and
	•		in certain instances, enjoining some or all of the operations of facilities deemed in non-compliance with permits issued pursuant to applicable laws and regulations.

     As with the industry generally, compliance with current and anticipated environmental laws and regulations increases Northwest’s overall cost of business, including its capital costs to construct, maintain and upgrade equipment and facilities. While these laws and regulations affect Northwest’s maintenance capital expenditures and net income, we believe that they do not affect Northwest’s competitive position in that the operations of Northwest’s competitors are similarly affected. Northwest believes that it is in substantial compliance with existing environmental laws and regulations and that continued compliance with current requirements will not have a material adverse effect on Northwest.

     The following is a discussion of some of the environmental laws and regulations that are applicable to natural gas transportation and storage activities and that may have a material impact on Northwest’s business.

     Waste Management. Northwest’s operations generate hazardous and non-hazardous solid wastes that are subject to the federal Resource Conservation and Recovery Act (“RCRA”), and comparable state laws, which impose detailed requirements for the handling, storage, treatment and disposal of hazardous and non-hazardous solid wastes. RCRA prohibits the disposal of certain hazardous wastes on land without prior treatment, and requires generators of wastes subject to land disposal restrictions to provide notification of pre-treatment requirements to disposal facilities that receive these wastes. Generators of hazardous wastes also must

comply with certain standards for the accumulation and storage of hazardous wastes, as well as recordkeeping and reporting requirements applicable to hazardous waste storage and disposal activities. RCRA imposes fewer restrictions on the handling, storage and disposal of non-hazardous solid wastes, which includes certain wastes associated with the exploration and production of oil and natural gas. In the course of its operations, Northwest may generate petroleum hydrocarbon wastes and ordinary industrial wastes such as paint wastes, waste solvents, and waste compressor oils that may be regulated as hazardous solid wastes. Similarly, the Toxic Substances Control Act (“TSCA”), and analogous state laws impose requirements on the use, disposal and storage of various chemicals and chemical substances. In the course of its operations, Northwest may use chemicals and chemical substances that are regulated by TSCA.

     Site Remediation. The Comprehensive Environmental Response, Compensation and Liability Act (“CERCLA”), and comparable state laws impose liability, without regard to fault or the legality of the original conduct, on certain classes of persons responsible for the release of hazardous substances into the environment. Such classes of persons include the current and past owner or operator of a site where a hazardous substance was released into the environment, and companies that disposed or arranged for the disposal of hazardous substances found at the site. Under CERCLA, such persons may be subject to joint and several strict liability for the costs of cleaning up the hazardous substances that were released into the environment, for damages to natural resources and for the costs of certain health studies. CERCLA also authorizes the EPA, and in some cases third parties, to take actions in response to threats to the public health or the environment and to seek to recover from the responsible classes of persons the costs that they incur. Moreover, it is not uncommon for neighboring landowners and other third parties to file claims for personal injury and property damage allegedly caused by the release of substances or wastes into the environment.

     Northwest currently owns or leases properties that for many years have been used for the transportation, compression, and storage of natural gas. Although Northwest typically used operating and disposal practices that were standard in the industry at the time, petroleum hydrocarbons and wastes may have been disposed of or released on or under the properties owned or leased by it or on or under other locations where such substances have been taken for recycling or disposal. In addition, some of these properties may have been operated by third parties or by previous owners whose treatment and disposal or release of petroleum hydrocarbons or wastes was not under Northwest’s control. These properties and the substances disposed or released on them may be subject to CERCLA, RCRA and analogous state laws. Under such laws, Northwest could be required to (i) remove previously disposed wastes, including waste disposed of by prior owners or operators; (ii) remediate contaminated property, including groundwater contamination, whether from prior owners or operators or other historic activities or spills; or (iii) perform remedial closure operations to prevent future contamination.

     Air Emissions. The Clean Air Act and comparable state laws regulate emissions of air pollutants from various industrial sources, including compressor stations, and also impose various monitoring and reporting requirements. Such laws and regulations may require (i) pre-approval for the construction or modification of certain projects or facilities expected to produce air emissions or result in an increase of existing air emissions; (ii) application for and strict compliance with air permits containing various emissions and operational limitations; or (iii) the utilization of specific emission control technologies to limit emissions. Failure to comply with these requirements could result in the assessment of monetary penalties and the pursuit of potentially criminal enforcement actions, the issuance of injunctions, and the further imposition of conditions or restrictions on permitted operations.

     Northwest has established systems and procedures to meet its reporting obligations under the Mandatory Reporting Rule related to greenhouse gas emissions issued by the EPA in late 2009. Also, certain states in which Northwest has operations have established reporting obligations. Northwest has not incurred significant capital investment to meet the obligations imposed by these new rules. The EPA is developing additional regulations that will expand the scope of the Mandatory Reporting Rule, with particular emphasis on natural gas operations. Northwest is participating directly and through trade associations in developmental aspects of that prospective rulemaking. It is likely that additional rules will be issued in 2010 which may expand Northwest’s reporting obligations as early as 2011. As those rules are still being developed, at this time Northwest is unable to estimate any capital investment that may be required to comply.

     Northwest may incur expenditures in the future for air pollution control equipment in connection with obtaining or maintaining operating permits and approvals for air emissions. For instance, Northwest may be required to supplement or modify its air emission control equipment and strategies due to changes in state implementation plans for controlling air emissions in regional non-attainment areas, or stricter regulatory requirements for sources of hazardous air pollutants. Northwest believes that any such future requirements imposed on it will not have a material adverse effect on its operations.

     Water Discharges. The Federal Water Pollution Control Act (“Clean Water Act”) and analogous state laws impose strict controls with respect to the discharge of pollutants, including spills and leaks of oil and other substances, into state waters as well as waters of the United States. The discharge of pollutants into regulated waters is prohibited, except in accordance with the terms of a permit issued by EPA or an analogous state agency. The Clean Water Act also regulates storm water runoff from certain industrial facilities. Accordingly, some states require industrial facilities to obtain and maintain storm water discharge permits, and monitor and sample storm water runoff from their facilities. Under the Clean Water Act, federal and state regulatory agencies may impose administrative, civil and criminal penalties for non-compliance with discharge permits or other requirements of the Clean Water Act and analogous state laws and regulations.

     Activities on Federal Lands. Natural gas transportation activities conducted on federal lands are subject to review and assessment under provisions of the National Environmental Policy Act (“NEPA”). NEPA requires federal agencies, including the Department of Interior, to evaluate major federal agency actions having the potential to significantly impact the environment. In the course of such

evaluations, agencies prepare Environmental Assessments, or more detailed Environmental Impact Statements, that assess the potential direct, indirect and cumulative impacts of a proposed project and which may be made available for public review and comment. Northwest’s current activities, as well as any proposed plans for future activities, on federal lands are subject to the requirements of NEPA.

     Endangered Species. The Endangered Species Act restricts activities that may affect threatened and endangered species or their habitats. Some of Northwest’s natural gas pipeline is located in areas inhabited by threatened or endangered species. If Northwest’s activities adversely affect endangered species or their habitats, Northwest could incur additional costs or become subject to operating restrictions or bans in the affected area. Civil and criminal penalties can be imposed against any person violating the Endangered Species Act.

Insurance

     Northwest’s insurance program includes general liability insurance, auto liability insurance, workers’ compensation insurance, and property insurance in amounts which management believes are reasonable and appropriate. However, Northwest is not fully insured against all risks inherent in its business. See “Risk Factors” below.

Employees

     We do not have any employees. We are managed and operated by the directors and officers of our general partner. All of our executive management personnel are employees of Williams or one of its subsidiaries and will devote the portion of their time to our business and affairs that is required to manage and conduct our operations. The officers of Williams Pipeline GP LLC will likely devote substantially less than a majority of their time to our business. These officers will manage the day-to-day affairs of our business and operations. Northwest is operated by an affiliate of Williams’ pursuant to an operating agreement, and the employees who operate the Northwest assets are therefore not employees of ours.

Transactions with Affiliates

     Northwest engages in transactions with Williams and other Williams subsidiaries. See Part II, Item 8. Financial Statements and Supplementary Data — Northwest Pipeline GP Notes to Consolidated Financial Statements: 1. Summary of Significant Accounting Policies and 9. Transactions with Major Customers and Affiliates and Part III, Item 13. Certain Relationships and Related Transactions, and Director Independence.

FINANCIAL INFORMATION ABOUT GEOGRAPHIC AREAS

     We have no revenue or segment profit/loss attributable to international activities.

Item 1A. Risk Factors

FORWARD-LOOKING STATEMENTS/RISK FACTORS AND CAUTIONARY STATEMENT FOR
PURPOSES OF THE “SAFE HARBOR” PROVISIONS OF
THE PRIVATE SECURITIES LITIGATION REFORM ACT OF 1995

     Certain matters contained in this report include “forward-looking statements” within the meaning of Section 27A of the Securities Act of 1933, as amended, and Section 21E of the Securities Exchange Act of 1934, as amended. These forward-looking statements relate to anticipated financial performance, management’s plans and objectives for future operations, business prospects, outcome of regulatory proceedings, market conditions and other matters. We make these forward-looking statements in reliance on the safe harbor protections provided under the Private Securities Litigation Reform Act of 1995.

     All statements, other than statements of historical facts, included in this report that address activities, events or developments that we expect, believe or anticipate will exist or may occur in the future, are forward-looking statements. Forward-looking statements can be identified by various forms of words such as “anticipates,” “believes,” “seeks,” “could,” “may,” “should,” “continues,” “estimates,” “expects,” “forecasts,” “intends,” “might,” “goals,” “objectives,” “targets,” “planned,” “potential,” “projects,” “scheduled,” “will” or other similar expressions. These forward-looking statements are based on management’s beliefs and assumptions and on information currently available to management and include, among others, statements regarding:

	•		Amounts and nature of future capital expenditures;
	•		Expansion and growth of our business and operations;
	•		Financial condition and liquidity;
	•		Business strategy;
	•		Cash flow from operations or results of operations;
	•		The levels of cash distributions to unitholders;
	•		Rate case filings; and
	•		Natural gas prices and demand.

     Forward-looking statements are based on numerous assumptions, uncertainties, and risks that could cause future events or results to be materially different from those stated or implied in this report. Limited partner units are inherently different from the capital stock of a corporation, although many of the business risks to which we are subject are similar to those that would be faced by a corporation engaged in a similar business. You should carefully consider the risk factors discussed below in addition to the other information in this report. If any of the following risks were actually to occur, our business, results of operations and financial condition could be materially adversely affected. In that case, we might not be able to pay distributions on our common units, the trading price of our common units could decline and unitholders could lose all or part of their investment. Many of the factors that could adversely affect our business, results of operations and financial condition are beyond our ability to control or predict. Specific factors that could cause actual results to differ from results contemplated by the forward-looking statements include, among others, the following:

	•		Whether we have sufficient cash from operations to enable us to maintain current levels of cash distributions or to pay the minimum quarterly distribution following establishment of cash reserves and payment of fees and expenses, including payments to our general partner;
	•		Availability of supplies (including the uncertainties inherent in assessing and estimating future natural gas reserves), market demand, volatility of prices, and the availability and cost of capital;
	•		Inflation, interest rates, and general economic conditions (including future disruptions and volatility in the global credit markets and the impact of these events on Northwest’s customers and suppliers);
	•		The strength and financial resources of our and Northwest’s competitors;
	•		Development of alternative energy sources;
	•		The impact of operational and development hazards;
	•		Costs of, changes in, or the results of laws, government regulations (including proposed climate change legislation), environmental liabilities, litigation and rate proceedings;
	•		Northwest’s costs for defined benefit pension plans and other postretirement benefit plans;
	•		Changes in maintenance and construction costs;
	•		Changes in the current geopolitical situation;
	•		Northwest’s exposure to the credit risk of its customers;
	•		Risks related to strategy and financing, including restrictions stemming from Northwest’s debt agreements, future changes in Northwest’s credit ratings and the availability and cost of credit;

	•		Risks associated with future weather conditions;
	•		Acts of terrorism; and
	•		Additional risks described in our filings with the SEC.

     Given the uncertainties and risk factors that could cause our actual results to differ materially from those contained in any forward-looking statement, we caution investors not to unduly rely on our forward-looking statements. We disclaim any obligations to and do not intend to update the above list or to announce publicly the result of any revisions to any of the forward-looking statements to reflect future events or developments.

     In addition to causing our actual results to differ, the factors listed above and referred to below may cause our intentions to change from those statements of intention set forth in this report. Such changes in our intentions may also cause our results to differ. We may change our intentions, at any time and without notice, based upon changes in such factors, our assumptions or otherwise.

     Because forward-looking statements involve risks and uncertainties, we caution that there are important factors, in addition to those listed above, that may cause actual results to differ materially from those contained in the forward-looking statements. These factors are described in the following section.

RISK FACTORS

     You should carefully consider the following risk factors in addition to the other information in this report. Each of these factors could adversely affect our business, operating results, and financial condition as well as adversely affect the value of an investment in our securities.

Risks Relating to Recent Developments

The current trading price of our common units has been impacted by the announcement of Williams Partners of its intention to engage in an exchange offer for our common units at a fixed exchange ratio, and we do not know what the impact on the trading price of our common units will be when the other terms of the exchange offer are announced or if Williams Partners does not launch such exchange offer or does not consummate such exchange offer once launched.

     Since the announcement by Williams Partners of its intention to launch an exchange offer for our common units described above under “Recent Developments” at a fixed exchange ratio of 0.7584 common units of Williams Partners for each of our common units, our common units have traded in a range that reflects that exchange ratio. We do not know whether such exchange offer will be launched, and if it is launched, what the other terms and conditions of the exchange offer will be. There can be no assurance that Williams Partners will launch the exchange offer. We do not know what the impact on the trading price of our common units will be when the other terms of the exchange offer are announced or if Williams Partners does not commence the exchange offer or does not consummate the exchange offer once launched because any of the conditions to the offer have not been satisfied.

If the Williams Partners’ exchange offer is consummated, it may have a negative impact on the trading market and price of our common units or result in the purchase of your units for cash by our General Partner.

     If the exchange offer of Williams Partners described above under “Recent Developments” is consummated, depending on the number of common units exchanged, the trading market for our common units that remain outstanding after the expiration of the exchange offer will become less liquid because there will be a smaller number of units outstanding and available for trading (a smaller “float”). To the extent that the float is reduced, such reduced float may negatively impact the market for, and the price of, our common units and make the trading price of our units more volatile.

     In addition, if Williams Partners acquires sufficient common units in the exchange offer so that it and its affiliates own more than 75 percent of our common units, it will have the right to exercise the “cash call” provision in our Agreement of Limited Partnership, which will allow it to acquire all remaining outstanding common units at a price based on then current market prices or prices it had previously paid to acquire units.

The Dropdown may significantly decrease the amount of natural gas transportation and storage assets that Williams would otherwise have had available to contribute to us.

     Williams recently transferred a substantial majority of its natural gas transportation assets in the Dropdown to another publicly traded limited partnership controlled by Williams and incurred substantial expenses in connection with the Dropdown. As a result, the possibility that any of such assets would be further dropped down to us as an avenue for our future growth has been substantially diminished. While we still may be able to grow organically or through third party acquisitions, the pace of such growth will likely be slower than if we could obtain the contribution of assets to us by Williams.

Risks Inherent in Our Industry and Our Business

We may not have sufficient cash from operations to enable us to maintain current levels of cash distributions or to pay the minimum quarterly distribution following the establishment of cash reserves and payment of fees and expenses, including cost reimbursements to our general partner.

     We may not have sufficient available cash from operating surplus each quarter to maintain current levels of cash distributions or to pay the minimum quarterly distribution. The amount of cash we can distribute on our units principally depends upon the amount of cash Northwest generates from its operations, which will fluctuate from quarter to quarter based on, among other things:

	•		the rates Northwest charges for its transportation and storage services and the volumes of natural gas its customers transport and store;
	•		the level of Northwest’s operating and maintenance expenses and general and administrative costs and our incremental general and administrative costs;
	•		the overall demand for natural gas in markets that Northwest serves and the quantities of natural gas available for transport, especially from the Rocky Mountain region, the San Juan Basin and the WCSB supply basins;
	•		regulatory action affecting the demand for natural gas, the supply of natural gas, the rates Northwest can charge, how Northwest contracts for services, and Northwest’s existing contracts, operating costs and operating flexibility;
	•		the development of LNG import terminals, which could materially affect the market price of natural gas, which could inturn indirectly affect the longer term supply and demand dynamics of natural gas in Northwest’s areas of operation; and
	•		potential competition from third parties who may build new pipelines in or near Northwest’s markets or supply basins.

     In addition, the actual amount of cash we will have available for distribution will depend on other factors, some of which are beyond our control, including:

	•		the amount of cash distributed by Northwest in respect of our 35 percent general partnership interest, which is our sole asset;
	•		the level of capital expenditures we and Northwest make, including expenditures to maintain Northwest’s facilities, to complete construction projects and to make acquisitions;
	•		our and Northwest’s debt service requirements and other liabilities;
	•		fluctuations in our and Northwest’s working capital needs;
	•		our and Northwest’s ability to borrow funds and access capital markets;
	•		the creditworthiness of, and timeliness of payment from, Northwest’s customers;
	•		restrictions contained in Williams’ and Northwest’s credit agreement and in Northwest’s indentures, including restrictions on distributions; and
	•		the amount of cash reserves established by Northwest and by our general partner.

We may not be able to grow or effectively manage our growth.

     A principal focus of our strategy is to continue to grow by expanding our business. Our future growth will depend upon our ability to successfully identify, finance, acquire, integrate and operate projects and businesses. Failure to achieve any of these factors would adversely affect our ability to achieve anticipated growth in the level of cash flows or realize anticipated benefits.

     We may acquire new facilities or Northwest may expand its existing facilities to capture anticipated future growth in natural gas production that does not ultimately materialize. As a result, new or expanded facilities may not achieve profitability. In addition, the process of integrating newly acquired or constructed assets into Northwest’s operations may result in unforeseen operating difficulties, may absorb significant management attention and may require financial resources that would otherwise be available for the ongoing development and expansion of our existing operations. Future acquisitions or construction projects may require substantial new capital and could result in the incurrence of indebtedness, additional liabilities and excessive costs that could have a material adverse effect on our business, results of operations, financial condition and ability to make cash distributions to unitholders. If we issue additional common units in connection with future acquisitions, unitholders’ interest in us will be diluted and distributions to unitholders may be reduced. Further, any limitations on our access to capital, including limitations caused by illiquidity in the capital markets, may impair our ability to complete future acquisitions and construction projects on favorable terms, if at all.

Future disruptions in the global credit markets may make equity and debt markets less accessible, create a shortage in the availability of credit and lead to credit market volatility.

     In 2008, public equity markets experienced significant declines and global credit markets experienced a shortage in overall liquidity and a resulting disruption in the availability of credit. Future disruptions in the global financial marketplace, including the bankruptcy or restructuring of financial institutions, could make equity and debt markets inaccessible and adversely affect the availability of credit already arranged and the availability and cost of credit in the future. Northwest has availability under their New Credit Facility, but its ability to borrow under that facility could be impaired if one or more of its lenders fails to honor its contractual obligation to lend to Northwest.

     As a publicly traded partnership, these developments could significantly impair our ability to make acquisitions or finance growth projects. We distribute all of our available cash to our unitholders on a quarterly basis. We typically rely upon external financing sources, including the issuance of debt and equity securities and bank borrowings, to fund acquisitions or expansion capital expenditures. Any limitations on our access to external capital, including limitations caused by illiquidity or volatility in the capital markets, may impair our ability to complete future acquisitions and construction projects on favorable terms, if at all. As a result, we may be at a competitive disadvantage as compared to businesses that reinvest all of their available cash to expand ongoing operations, particularly under current economic conditions.

Adverse economic conditions could negatively affect our results of operations.

     A slowdown in the economy has the potential to negatively impact our business in many ways. Included among these potential negative impacts are reduced demand and lower prices for Northwest’s products and services, increased difficulty in collecting amounts owed to Northwest by its customers and a reduction in Northwest’s credit ratings (either due to tighter rating standards or the negative impacts described above), which could result in reducing Northwest’s and our access to credit markets, raising the cost of such access or requiring Williams, Northwest or us to provide additional collateral to third parties.

The amount of cash we have available for distribution to holders of our common units and subordinated units depends primarily on our cash flow and not solely on profitability, which may prevent us from making cash distributions during periods when we record net income.

     The amount of cash we have available for distribution depends primarily upon our cash flow, including cash from financial reserves and working capital or other borrowings, and not solely on profitability, which will be affected by non-cash items. As a result, we may make cash distributions during periods when we record net losses for financial accounting purposes and may not make cash distributions during periods when we record net earnings for financial accounting purposes.

We and Williams Partners jointly control Northwest. As a result, we cannot independently control the amount of cash we will receive from Northwest, and we may be required to contribute significant cash to fund Northwest’s operations.

     Our 35 percent general partnership interest in Northwest is our sole asset and therefore Northwest generates substantially all of our cash available for distribution. As a result, our performance is substantially dependent on Northwest’s distributions to us. The ownership of Northwest is shared between us and Williams Partners. Accordingly, we cannot independently control the amount of cash distributed to us, nor can we independently control ongoing operational decisions, including the incurrence of capital expenditures that we may be required to fund. More specifically:

	•		we cannot independently control decisions with respect to the operation of Northwest, including decisions with respect to incurrence of expenses and distributions to us;
	•		Northwest may establish reserves for working capital and maintenance capital expenditures which would reduce cash otherwise available for distribution to us;
	•		Northwest may incur additional indebtedness, and the related principal and interest payments would reduce cash otherwise available for distribution to us;
	•		Northwest may require us to make additional capital contributions to fund working and maintenance capital expenditures, as well as to fund expansion capital expenditures, funding of which could reduce the amount of cash otherwise available for distribution to you.

     Our lack of 100 percent control over the operation of Northwest may mean that we do not receive the amount of cash expected to be distributed to us. We may be required to make capital contributions to Northwest, and these contributions may be material. This lack of 100 percent control may materially and adversely affect our ability to distribute cash to you.

Northwest’s natural gas transportation and storage activities involve numerous risks that might result in accidents and other operating risks and hazards.

     Northwest’s operations are subject to all the risks and hazards typically associated with the transportation and storage of natural gas. These operating risks include, but are not limited to:

	•		fires, blowouts, cratering and explosions;
	•		uncontrolled releases of natural gas;
	•		pollution and other environmental risks;
	•		natural disasters;
	•		aging pipeline infrastructure and mechanical problems;
	•		damages to pipelines and pipeline blockages;
	•		operator error;
	•		damage inadvertently caused by third party activity, such as operation of construction equipment; and
	•		terrorist attacks or threatened attacks on Northwest’s facilities or those of other energy companies.

     These risks could result in loss of human life, personal injuries, significant damage to property, environmental pollution, impairment of Northwest’s operations and substantial losses to Northwest and us. In accordance with customary industry practice, Northwest maintains insurance against some, but not all of these risks and losses, and only at levels they believe to be appropriate. The location of certain segments of Northwest’s pipeline in or near populated areas, including residential areas, commercial business centers and industrial sites, could increase the damages resulting from these risks. In spite of any precautions taken, an event such as

those described above could cause considerable harm to people or property and could have a material adverse effect on Northwest’s and our financial condition and results of operations particularly if the event is not fully covered by insurance. Accidents or other operating risks could further result in loss of service available to Northwest’s customers. Such circumstances, including those arising from maintenance and repair activities, could result in service interruptions on segments of Northwest’s pipeline infrastructure. Potential customer impacts arising from service interruptions on segments of Northwest’s pipeline infrastructure could include limitations on the pipeline’s ability to satisfy customer requirements, obligations to provide reservations charge credits to customers in times of constrained capacity, and solicitation of existing customers by others for potential new pipeline projects that would compete directly with existing services. Such circumstances could adversely impact Northwest’s ability to meet contractual obligations and retain customers, with a resulting negative impact on Northwest’s business, financial condition, results of operations and cash flows, and on our ability to make distributions to you.

Increased competition from alternative natural gas transportation and storage options and alternative fuel sources could have a significant financial impact on Northwest and us.

     Northwest competes primarily with other interstate pipelines and storage facilities in the transportation and storage of natural gas. Some of Northwest’s competitors may have greater financial resources and access to greater supplies of natural gas than Northwest does. Some of these competitors may expand or construct transportation and storage systems that would create additional competition for natural gas supplies or the services Northwest provides to its customers. Moreover, Williams Partners and its affiliates, including Williams, may not be limited in their ability to compete with Northwest or us. Further, natural gas also competes with other forms of energy available to Northwest’s customers, including electricity, coal, fuel oils and other alternative energy sources.

     The principal elements of competition among natural gas transportation and storage assets are rates, terms of service, access to natural gas supplies, flexibility and reliability. FERC’s policies promoting competition in natural gas markets could have the effect of increasing the natural gas transportation and storage options for Northwest’s traditional customer base. As a result, Northwest could experience some “turnback” of firm capacity as the primary terms of existing agreements expire. If Northwest is unable to remarket this capacity or can remarket it only at substantially discounted rates compared to previous contracts, Northwest or its remaining customers may have to bear the costs associated with the turned back capacity. Increased competition could reduce the amount of transportation or storage capacity contracted on Northwest’s system or, in cases where it does not have long-term fixed rate contracts, could force Northwest to lower its transportation or storage rates. Competition could intensify the negative impact of factors that significantly decrease demand for natural gas or increase the price of natural gas in the markets served by Northwest’s pipeline system, such as competing or alternative forms of energy, a regional or national recession or other adverse economic conditions, weather, higher fuel costs and taxes or other governmental or regulatory actions that directly or indirectly increase the price of natural gas or limit the use of, or increase the demand for, natural gas. Northwest’s ability to renew or replace existing contracts at rates sufficient to maintain current revenues and cash flows could be adversely affected by the activities of Northwest’s competitors. Please read Part I, Item 1. Business — Northwest’s Competition. All of these competitive pressures could have a material adverse effect on Northwest’s business, financial condition, results of operations and cash flows, and on our ability to make distributions to you.

Northwest may not be able to maintain or replace expiring natural gas transportation and storage contracts at favorable rates or on a long-term basis.

     Northwest’s primary exposure to market risk occurs at the time the terms of existing transportation and storage contracts expire and are subject to termination. Although none of Northwest’s material contracts are terminable in 2010, upon expiration of the terms, Northwest may not be able to extend contracts with existing customers to obtain replacement contracts at favorable rates or on a long-term basis.

     The extension or replacement of existing contracts depends on a number of factors beyond Northwest’s control, including:

	•		the level of existing and new competition to deliver natural gas to Northwest’s markets;
	•		the growth in demand for natural gas in Northwest’s markets;
	•		whether the market will continue to support long-term firm contracts;
	•		whether Northwest’s business strategy continues to be successful;
	•		the level of competition for natural gas supplies in the production basins serving Northwest; and
	•		the effects of state regulation on customer contracting practices.

     Any failure to extend or replace a significant portion of Northwest’s existing contracts may have a material adverse effect on Northwest’s business, financial condition, results of operations and cash flows, and on our ability to make distributions to you.

Competitive pressures could lead to decreases in the volume of natural gas contracted or transported through Northwest’s pipeline system.

     Although most of Northwest’s pipeline system’s current capacity is fully contracted, FERC has taken certain actions to strengthen market forces in the natural gas pipeline industry that have led to increased competition throughout the industry. In a number of key markets, interstate pipelines are now facing competitive pressure from other major pipeline systems, enabling local distribution companies and end users to choose a transmission provider based on considerations other than location. Other entities could construct new pipelines or expand existing pipelines that could potentially serve the same markets as Northwest’s pipeline system. Any such new pipelines could offer transportation services that are more desirable to shippers because of locations, facilities, or other factors. These pipelines could charge rates or provide service to locations that would result in greater net profit for shippers and producers and thereby force Northwest to lower the rates charged for service on its pipeline in order to extend its existing transportation service agreements or to attract new customers. Northwest is aware of proposals by competitors to expand pipeline capacity in certain markets it also serves which, if the proposed projects proceed, could increase the competitive pressure upon Northwest. There can be no assurance that Northwest will be able to compete successfully against current and future competitors and any failure to do so could have a material adverse effect on Northwest’s business and results of operations and cash flows, and on our ability to make distributions to you.

Northwest’s natural gas transportation and storage operations are subject to regulation by FERC, which could have an adverse impact on its ability to establish transportation and storage rates that would allow it to recover the full cost of operating its pipeline, including a reasonable rate of return, and on our ability to make distributions to you.

     Northwest’s interstate natural gas transportation and storage operations are subject to federal, state and local regulatory authorities. Specifically, its interstate pipeline transportation and storage services and related assets are subject to regulation by FERC. The federal regulation extends to such matters as:

	•		transportation of natural gas in interstate commerce;
	•		rates, operating terms and conditions of service, including initiation and discontinuation of services;
	•		the types of services Northwest may offer to its customers;
	•		certification and construction of new facilities;
	•		acquisition, extension, disposition or abandonment of facilities;
	•		accounts and records;
	•		depreciation and amortization policies;
	•		relationships with marketing functions within Williams involved in certain aspects of the natural gas business; and
	•		market manipulation in connection with interstate sales, purchases or transportation of natural gas.

     Under the Natural Gas Act, or NGA, FERC has authority to regulate interstate providers of natural gas pipeline transportation and storage services, and such providers may only charge rates that have been determined to be just and reasonable by FERC. In addition, FERC prohibits providers from unduly preferring or unreasonably discriminating against any person with respect to pipeline rates or terms and conditions of service.

     Regulatory actions in these areas can affect Northwest’s business in many ways, including decreasing tariff rates and revenues, decreasing volumes in Northwest’s pipelines, increasing Northwest’s costs and otherwise altering the profitability of Northwest’s business.

     The FERC’s Standards of Conduct govern the relationship between natural gas transmission providers and their marketing function employees as defined by the rule. The standards of conduct are intended to prevent natural gas transmission providers from preferentially benefiting gas marketing functions by requiring the employees of a transmission provider that perform transmission functions to function independently from marketing function employees and by restricting the information that transmission providers may provide to gas marketing employees. The inefficiencies created by the restrictions on the sharing of employees and information may increase Northwest’s costs, and the restrictions on the sharing of information may have an adverse impact on the ability of Northwest’s senior management to effectively obtain important information about its business. Violators of the rules are subject to potentially substantial civil penalty assessments.

     The rates, terms and conditions for Northwest’s interstate pipeline and storage services are set forth in its FERC-approved tariff. Pursuant to the terms of Northwest’s most recent rate settlement agreement, Northwest must file a new rate case to become effective not later than January 1, 2013. Any successful complaint or protest against Northwest’s rates could have an adverse impact on Northwest’s revenues associated with providing transportation and storage services.

Northwest could be subject to penalties and fines if it fails to comply with FERC regulations.

     Northwest’s transportation and storage operations are regulated by FERC. Should Northwest fail to comply with all applicable FERC administered statutes, rules, regulations and orders, it could be subject to substantial penalties and fines. Under the Energy Policy Act of 2005, FERC has civil penalty authority under the NGA to impose penalties for current violations of up to $1,000,000 per day for each violation. Any material penalties or fines imposed by FERC could have a material adverse impact on Northwest’s business, financial condition, results of operations and cash flows, and on our ability to make distributions to you.

The outcome of future rate cases to set the rates Northwest can charge customers on its pipeline might result in rates that lower Northwest’s return on the capital that Northwest has invested in its pipeline.

     There is a risk that the rates set by FERC will be inadequate to cover increases in operating costs or to sustain an adequate return on capital investments. There is also the risk that higher rates will cause Northwest’s customers to look for alternative ways to transport their natural gas.

The outcome of future rate cases will determine the amount of income taxes that Northwest will be allowed to recover.

     In May 2005, FERC issued a statement of general policy permitting a pipeline to include in its cost-of-service computations an income tax allowance provided that an entity or individual has an actual or potential income tax liability on income from the pipeline’s public utility assets. The extent to which owners of pipelines have such actual or potential income tax liability will be reviewed by FERC on a case-by-case basis in rate cases where the amounts of the allowances will be established.

Legal and regulatory proceedings and investigations relating to the energy industry and capital markets have adversely affected our business and may continue to do so.

     Public and regulatory scrutiny of the energy industry and of the capital markets has resulted in increased regulation being either proposed or implemented. Such scrutiny has also resulted in various inquiries, investigations and court proceedings in which Northwest or its affiliates are named as defendants. Both the shippers on Northwest’s pipeline and regulators have rights to challenge the rates Northwest charges under certain circumstances. Any successful challenge could materially affect Northwest’s results of operations.

     Certain inquiries, investigations and court proceedings are ongoing. Northwest might see adverse effects continue as a result of the uncertainty of these ongoing inquiries and proceedings, or additional inquiries and proceedings by federal or state regulatory agencies or private plaintiffs. In addition, Northwest cannot predict the outcome of any of these inquiries or whether these inquiries will lead to additional legal proceedings against Northwest, civil or criminal fines or penalties, or other regulatory action, including legislation, which might be materially adverse to the operation of Northwest’s business and revenues and net income or increase Northwest’s operating costs in other ways. Current legal proceedings or other matters against Northwest including environmental matters, suits, regulatory appeals and similar matters might result in adverse decisions against Northwest. The result of such adverse decisions, either individually or in the aggregate, could be material and may not be covered fully or at all by insurance.

Any significant decrease in supplies of natural gas in Northwest’s areas of operation could adversely affect its business and operating results and reduce our cash available for distribution to unitholders.

     Northwest’s business is dependent on the continued availability of natural gas production and reserves. The development of the additional natural gas reserves requires significant capital expenditures by others for exploration and development drilling and the installation of production, gathering, storage, transportation and other facilities that permit natural gas to be produced and delivered to Northwest’s pipeline system. Low prices for natural gas, regulatory limitations, including environmental regulations, or the lack of available capital for these projects could adversely affect the development and production of additional reserves, as well as gathering, storage, pipeline transmission and import and export of natural gas supplies, adversely impacting Northwest’s ability to fill the capacities of its transmission facilities.

     Production from existing wells and natural gas supply basins with access to Northwest’s pipeline will naturally decline over time. The amount of natural gas reserves underlying these wells may also be less than anticipated, and the rate at which production from these reserves declines may be greater than anticipated. Additionally, the competition for natural gas pipelines to serve other markets could reduce the amount of natural gas supply for Northwest’s customers. Accordingly, to maintain or increase the contracted capacity or the volume of natural gas transported on Northwest’s pipeline and cash flows associated with the transportation of natural gas, Northwest’s customers must compete with others to obtain adequate supplies of natural gas.

     If new supplies of natural gas are not obtained to replace the natural decline in volumes from existing supply basins, if natural gas supplies are diverted to serve other markets, or if environmental regulators restrict new natural gas drilling, the overall volume of natural gas transported and stored on Northwest’s system would decline, which could have a material adverse effect on Northwest’s business, financial condition and results of operations, and on our ability to make distributions to you.

Decreases in demand for natural gas could adversely affect Northwest’s business.

     Demand for Northwest’s transportation services depends on the ability and willingness of shippers with access to Northwest’s facilities to satisfy their demand by deliveries through Northwest’s system. Any decrease in this demand could adversely affect Northwest’s business. Demand for natural gas is also affected by weather, future industrial and economic conditions, fuel conservation measures, alternative fuel requirements, governmental regulation, or technological advances in fuel economy and energy generation devices, all of which are matters beyond our and Northwest’s control. Additionally, in some cases, new LNG import facilities built near Northwest’s markets could result in less demand for Northwest’s transmission facilities.

Significant prolonged changes in natural gas prices could affect supply and demand, cause a termination of Northwest’s transportation and storage contracts or a reduction in throughput on Northwest’s system, and adversely affect our cash available to make distributions to you.

     Higher natural gas prices over the long term could result in a decline in the demand for natural gas and, therefore, in Northwest’s long-term transportation and storage contracts or throughput on Northwest’s system. Also, lower natural gas prices over the long term could result in a decline in the production of natural gas resulting in reduced contracts or throughput on Northwest’s system. As a result, significant prolonged changes in natural gas prices could have a material adverse effect on Northwest’s business, financial condition, results of operations and cash flows, and on our ability to make distributions to you.

Some portions of Northwest’s current pipeline infrastructure and other assets have been in use for many decades, which may adversely affect its business and our ability to make distributions to you.

     Some portions of Northwest’s assets, including its pipeline infrastructure, have been in use for many decades. The current age and condition of Northwest’s assets could result in a material adverse impact on Northwest’s business, financial condition and results of operations and on our ability to make distributions to you if the costs of maintaining its facilities exceed current expectations.

The failure of new sources of natural gas production or LNG import terminals to be successfully developed in North America could increase natural gas prices and reduce the demand for Northwest’s services.

     New sources of natural gas production in the United States and Canada, particularly in areas of shale development are expected to become an increasingly significant component of future natural gas supplies in North America. Additionally, increases in LNG supplies are expected to be imported through new LNG import terminals, particularly in the Gulf Coast region. If these additional sources of supply are not developed, natural gas prices could increase and cause consumers of natural gas to turn to alternative energy

sources which could have a material adverse effect on Northwest’s business, financial condition, results of operations and cash flows, and on our ability to make distributions to you.

Northwest depends on certain key customers for a significant portion of its revenues. The loss of any of these key customers or the loss of any contracted volumes could result in a decline in Northwest’s business and our cash available to make distributions to you.

     Northwest relies on a limited number of customers for a significant portion of its revenues. For the year ended December 31, 2009, Northwest’s two largest customers was Puget Sound Energy, Inc. and Northwest Natural Gas Company. These customers accounted for approximately 33.1 percent of Northwest’s operating revenues for the year ended December 31, 2009. The loss of even a portion of Northwest’s contracted volumes, as a result of competition, creditworthiness, inability to negotiate contract extensions or replacements of contracts or otherwise, could have a material adverse effect on Northwest’s business, financial condition, results of operations and cash flows, and on our ability to make distributions to you, unless Northwest is able to acquire comparable revenues from other sources.

If third-party pipelines and other facilities interconnected to Northwest’s pipeline and facilities become unavailable to transport natural gas, Northwest’s revenues and our ability to make distributions to you could be adversely affected.

     Northwest depends upon third-party pipelines and other facilities that provide delivery options to and from its pipeline and storage facilities. Because Northwest does not own these third-party pipelines or facilities, their continuing operation is not within Northwest’s control. If these pipelines or other facilities were to become temporarily or permanently unavailable for any reason, or if throughput were reduced because of testing, line repair, damage to pipelines or facilities, reduced operating pressures, lack of capacity, increased credit requirements or rates charged by such pipelines or facilities or other causes, Northwest and its customers would have reduced capacity to transport, store or deliver natural gas to end use markets, thereby reducing its revenues. Further, although there are laws and regulations designed to encourage competition in wholesale market transactions, some companies may fail to provide fair and equal access to their transportation systems or may not provide sufficient transportation capacity for other market participants. Any temporary or permanent interruption at any key pipeline interconnect causing a material reduction in volumes transported on Northwest’s pipeline or stored at Northwest’s facilities could have a material adverse effect on Northwest’s business, financial condition, results of operations and cash flows, and on our ability to make distributions to you.

Northwest is exposed to the credit risk of its customers, and its credit risk management may not be adequate to protect against such risk.

     Northwest is subject to the risk of loss resulting from nonpayment and/or nonperformance by its customers in the ordinary course of its business. Generally Northwest’s customers are rated investment grade, are otherwise considered creditworthy, or are required to make pre-payments or provide security to satisfy credit concerns. However, Northwest’s credit procedures and policies may not be adequate to fully eliminate customer credit risk. Northwest cannot predict to what extent its business would be impacted by deteriorating conditions in the economy, including declines in Northwest’s customers’ creditworthiness. If Northwest fails to adequately assess the creditworthiness of existing or future customers, unanticipated deterioration in their creditworthiness and any resulting increase in nonpayment and/or nonperformance by them could cause Northwest to write down or write off doubtful accounts. Such write-downs or write-offs could negatively affect Northwest’s operating results for the period in which they occur, and, if significant, could have a material adverse effect on its business, results of operations, cash flows and financial condition.

Northwest’s debt agreements and Williams’and Williams Partners’ public indentures contain financial and operating restrictions that may limit Northwest’s access to credit and affect its ability to operate its business. In addition, Northwest’s ability to obtain credit in the future will be affected by Williams’ and Williams Partners’ credit ratings.

     Northwest’s public indentures contain various covenants that, among other things, limit its ability to grant certain liens to support indebtedness, merge, or sell substantially all of its assets. In addition, Northwest’s new credit facility entered into as part of Williams’ restructuring (“New Credit Facility”) contains certain financial covenants and restrictions on its ability and its subsidiaries’ ability to incur indebtedness, to consolidate or allow any material change in the nature of its business, enter into certain affiliate transactions, and make certain distributions during an event of default. These covenants could adversely affect Northwest’s ability to finance its future operations or capital needs or engage in, expand or pursue its business activities and prevent it from engaging in certain transactions that might otherwise be considered beneficial to them. Northwest’s ability to comply with these covenants may be affected by events beyond their control, including prevailing economic, financial and industry conditions. If market or other economic conditions deteriorate, Northwest’s current assumptions about future economic conditions turn out to be incorrect or unexpected events occur, Northwest’s ability to comply with these covenants may be significantly impaired.

     Williams’ and Williams Partners’ public indentures contain covenants that restrict their and Northwest’s ability to incur liens to support indebtedness. These covenants could adversely affect Northwest’s ability to finance its future operation or capital needs or engage in, expand or pursue its business activities and prevent them from engaging in certain transactions that might otherwise be considered beneficial to them. Williams’ and Williams Partners’ ability to comply with the covenants contained in their respective debt instruments may be affected by events beyond Northwest’s, Williams’ and Williams Partners’ control, including prevailing economic, financial and industry conditions. If market or other economic conditions deteriorate, Williams’ or Williams Partners’ ability to comply with these covenants may be negatively impacted.

     Northwest’s failure to comply with the covenants in its debt agreements could result in events of default. Upon the occurrence of such an event of default, the lenders could elect to declare all amounts outstanding under a particular facility to be immediately due and payable and terminate all commitments, if any, to extend further credit. Certain payment defaults or an acceleration under Northwest’s public indentures or other material indebtedness could cause a cross-default or cross-acceleration of Northwest’s New Credit Facility. Such a cross-default or cross-acceleration could have a wider impact on Northwest’s liquidity than might otherwise arise from a default or acceleration of a single debt instrument. If an event of default occurs, or if Northwest’s New Credit Facility cross-defaults, and the lenders under the affected debt agreements accelerate the maturity of any loans or other debt outstanding to Northwest, Northwest may not have sufficient liquidity to repay amounts outstanding under such debt agreements. For more information regarding Northwest’s debt agreements, please read Part II, Item 7. Management’s Discussion and Analysis of Financial Condition and Results of Operations — Capital Resources and Liquidity of Northwest.

      Substantially all of Williams’ and Williams Partners’ operations are conducted through their respective subsidiaries. Williams’ and Williams Partners’ cash flows are substantially derived from loans, dividends and distributions paid to it by their respective subsidiaries, including Williams Gas Pipeline Company, LLC (“WGP”), Northwest’s majority partner. Williams’ and Williams Partners’ cash flows are typically utilized to service debt and pay dividends or distributions on their equity, with the balance, if any, reinvested in their respective subsidiaries as loans or contributions to capital. Due to Northwest’s relationship with Williams and Williams Partners, its ability to obtain credit will be affected by Williams’ and Williams Partners’ credit ratings. If Williams and Williams Partners were to experience deterioration in their respective credit standing or financial condition, Northwest’s access to credit and its ratings could be adversely affected. Any future downgrading of a Williams’ and Williams Partners’ credit rating would likely also result in a downgrading of Northwest’s credit rating. A downgrading of a Williams’ and Williams Partners’ credit rating could limit Northwest’s ability to obtain financing in the future upon favorable terms, if at all.

Acquisitions or expansion projects may reduce our cash from operations on a per unit basis.

     If we or Northwest make acquisitions or complete expansion projects, these acquisitions or expansion projects may reduce our cash from operations on a per unit basis. Any acquisition or expansion project involves potential risks, including, among other things:

	•		decreases in liquidity as a result of using a significant portion of available cash or borrowing capacity to finance the project or acquisition;
	•		inability to complete expansion projects on schedule or within the budgeted cost due to the unavailability of required construction personnel or materials, accidents, weather conditions or an inability to obtain necessary permits;
	•		inability to receive cash flows from a newly built or acquired asset until it is operational;

	•		unforeseen difficulties operating in new producing basins or end-use markets; and
	•		customer losses at the acquired business.

     If any expansion projects or acquisitions we or Northwest ultimately complete are not accretive to our cash available for distribution, our ability to make distributions to you may be reduced.

     Northwest is subject to risks associated with climate change.

     There is a growing belief that emissions of greenhouse gases may be linked to climate change. Climate change and the costs that may be associated with its impacts and the regulation of greenhouse gases have the potential to affect Northwest’s business in many ways, including negatively impacting the costs it incurs in providing products and services, the demand for and consumption of its products and services (due to change in both costs and weather patterns), and the economic health of the regions in which Northwest operates, all of which can create financial risks.

Northwest’s operations are subject to governmental laws and regulations relating to the protection of the environment, including those relating to climate change, which may expose them to significant costs and liabilities and could exceed current expectations.

     The risk of substantial environmental costs and liabilities is inherent in natural gas transportation and storage operations, and Northwest may incur substantial environmental costs and liabilities in the performance of these types of operations. Northwest’s operations are subject to extensive federal, state and local environmental laws and regulations governing environmental protection, the discharge of materials into the environment and the security of chemical and industrial facilities. For a description of these laws and regulations, please see Part I, Item 1. Business — Regulatory Matters — Environmental Regulation.

     These laws and regulations may impose numerous obligations that are applicable to Northwest’s operations including the acquisition of permits to conduct regulated activities, the incurrence of capital expenditures to limit or prevent releases of materials from its pipeline and facilities, and the imposition of substantial costs and penalties for spills, releases and emissions of various regulated substances into the environment resulting from those operations. Various governmental authorities, including the U.S. Environmental Protection Agency and analogous state agencies, and the United States Department of Homeland Security have the power to enforce compliance with these laws and regulations and the permits issued under them, oftentimes requiring difficult and costly actions. Failure to comply with these laws, regulations and permits may result in the assessment of administrative, civil and criminal penalties, the imposition of remedial obligations, the imposition of stricter conditions on or revocation of permits, and the issuance of injunctions limiting or preventing some or all of Northwest’s operations.

     There is inherent risk of incurring significant environmental costs and liabilities in Northwest’s business, some of which may be material due to Northwest’s handling of petroleum hydrocarbons and wastes, the occurrence of air emissions and water discharges related to the operations, and historical industry operations and waste disposal practices. Joint and several, strict liability may be incurred without regard to fault under certain environmental laws and regulations, including CERCLA, RCRA and analogous state laws, and in connection with spills or releases of natural gas and wastes on, under, or from Northwest’s properties and facilities. Private parties, including the owners of properties through which Northwest’s pipeline passes and facilities where Northwest’s wastes are taken for reclamation or disposal, may have the right to pursue legal actions to enforce compliance as well as to seek damages for non-compliance with environmental laws and regulations or for personal injury or property damage arising from Northwest’s operations. In addition, increasingly strict laws, regulations and enforcement policies could materially increase Northwest’s compliance costs and the cost of any remediation that may become necessary. Northwest’s insurance may not cover all environmental risks and costs or may not provide sufficient coverage if an environmental claim is made against Northwest.

     Northwest’s business may be adversely affected by increased costs due to stricter pollution control requirements or liabilities resulting from non-compliance with required operating or other regulatory permits. Also, Northwest might not be able to obtain or maintain from time to time all required environmental regulatory approvals, or if Northwest fails to obtain and comply with them, the operation of its facilities could be prevented or become subject to additional costs resulting in potentially material adverse consequences to Northwest’s business financial condition, results of operations and cash flows, and on our ability to make distributions to you.

     Northwest makes assumptions and develops expectations about possible expenditures related to environmental conditions based on current laws and regulations and current interpretations of those laws and regulations. If the interpretation of laws or regulations, or the laws and regulations themselves, change, Northwest’s assumptions may change, and any new capital costs incurred to comply with such changes may not be recoverable under Northwest’s regulatory rate structure or its customer contracts. In addition, new environmental laws and regulations might adversely affect Northwest’s activities, including storage and transportation, as well as waste management and air emissions. For instance, federal and state agencies could impose additional safety requirements, any of which could have a material adverse effect on Northwest’s business, financial condition, results of operations and cash flows, and on our ability to make distributions to you.

Northwest may be subject to legislative and regulatory responses to climate change with which compliance may be costly.

     Recent scientific studies have suggested that emissions of certain gases, commonly referred to as “greenhouse gases” (“GHGs”), may be contributing to warming of the earth’s atmosphere, and various governmental bodies have considered legislative and regulatory responses in this area. Legislative and regulatory responses related to GHGs and climate change create the potential for financial risk. The United States Congress and certain states have for some time been considering various forms of legislation related to GHG emissions. There have also been international efforts seeking legally binding reductions in emissions of GHGs. In addition, increased public awareness and concern may result in more state, federal, and international proposals to reduce or mitigate the emission of GHGs.

     Several bills have been introduced in the United States Congress that would compel GHG emission reductions. On June 26, 2009, the U.S. House of Representatives passed the “American Clean Energy and Security Act” which is intended to decrease annual GHG emissions through a variety of measures, including a “cap and trade” system which limits the amount of GHGs that may be emitted and incentives to reduce the nation’s dependence on traditional energy sources. The U.S. Senate is currently considering similar legislation, and numerous states have also announced or adopted programs to stabilize and reduce GHGs. In addition, on December 7, 2009, the EPA issued a final determination that six GHGs are a threat to public safety and welfare. This determination could ultimately lead to the direct regulation of GHG emissions in our industry under the Clean Air Act. While it is not clear whether or when any federal or state climate change laws or regulations will be passed, any of these actions could result in increased costs to (i) operate and maintain Northwest’s facilities, (ii) install new emission controls on Northwest’s facilities, and (iii) administer and manage any GHG emissions program. If Northwest is unable to recover or pass through a significant level of its costs related to complying with climate change regulatory requirements imposed on us, it could have a material adverse effect on Northwest’s results of operations and on our ability to make distributions to you. To the extent financial markets view climate change and GHG emissions as a financial risk, this could negatively impact Northwest’s costs of and access to capital.

Northwest does not own all of the land on which its pipeline and facilities are located, which could disrupt its operations.

     Northwest does not own all of the land on which its pipeline and facilities have been constructed. As such, we are subject to the possibility of increased costs to retain necessary land use. Northwest obtains, in certain circumstances, the rights to construct and operate its pipeline on land owned by third parties and governmental agencies for a specific period of time. In addition, some of Northwest’s facilities cross Native American lands pursuant to rights-of-way of limited term. Northwest does not have the right of eminent domain over land owned by Native American tribes. Northwest’s loss of any of these rights, through its inability to renew right of way contracts or otherwise, could have a material adverse effect on its business, financial condition, results of operations and cash flows, and on our ability to make distributions to you.

Northwest’s allocation from Williams for costs for its defined benefit pension plans and other postretirement benefit plans are affected by factors beyond Northwest’s and Williams’ control.

     As Northwest has no employees, employees of Williams and its affiliates provide services to Northwest. As a result, Northwest is allocated a portion of Williams’ costs in defined benefit pension plans covering substantially all of Williams’ or its affiliates’ employees providing services to Northwest, as well as a portion of the costs of other postretirement benefit plans covering certain eligible participants providing services to Northwest. The timing and amount of Northwest’s allocations under the defined benefit pension plans depend upon a number of factors Williams controls, including changes to pension plan benefits, as well as factors outside of Williams’ control, such as asset returns, interest rates and changes in pension laws. Changes to these and other factors that can significantly increase Northwest’s allocations could have a significant adverse effect on Northwest’s financial condition, results of operations and cash flows, and on our ability to make distributions to you.

We and Northwest do not insure against all potential losses and could be seriously harmed by unexpected liabilities or by the inability of the insurers we do use to satisfy our claims.

     We and Northwest are not fully insured against all risks inherent to our businesses, including environmental accidents that might occur. In addition, neither we nor Northwest maintain business interruption insurance in the type and amount to cover all possible risks of loss. Williams currently maintains excess liability insurance with limits of $610 million per occurrence and in the aggregate annually and a deductible of $2 million per occurrence. This insurance covers Williams, its subsidiaries and certain of its affiliates, including us and Northwest for legal and contractual liabilities arising out of bodily injury, personal injury or property damage, including resulting loss of use, to third parties. This excess liability insurance includes coverage for sudden and accidental pollution liability for full limits, with the first $135 million of insurance also providing gradual pollution liability coverage for natural gas and natural gas liquids operations. Pollution liability coverage excludes: release of pollutants subsequent to their disposal; release of

substances arising from the combustion of fuels that result in acidic deposition, and testing, monitoring, clean-up, containment, treatment or removal of pollutants from property owned, occupied by, rented to, used by or in the care, custody or control of Williams and its affiliates.

     Williams does not insure onshore underground pipelines for physical damage, except at river crossings and at certain locations such as compressor stations. Williams maintains coverage of $300 million per occurrence for physical damage to onshore assets and resulting business interruption caused by terrorist acts. Also, all of Williams’ insurance is subject to deductibles. If a significant accident or event occurs for which we or Northwest are not fully insured, it could adversely affect Northwest’s or our operations and financial condition. We or Northwest may not be able to maintain or obtain insurance of the type and amount we desire at reasonable rates. Changes in the insurance markets subsequent to hurricane losses have impacted named windstorm insurance coverage, rates and availability for Gulf of Mexico area exposures, and we or Northwest may elect to self insure a portion of our asset portfolio. We cannot assure you that we or Northwest will in the future be able to obtain the levels or types of insurance we or Northwest would otherwise have obtained prior to these market changes or that the insurance coverage we or Northwest do obtain will not contain large deductibles or fail to cover certain hazards or cover all potential losses. The occurrence of any operating risks not fully covered by insurance could have a material adverse effect on Northwest’s and our business, financial condition, results of operations and cash flows, and on our ability to make distributions to you.

     In addition, certain insurance companies that provide coverage to Northwest and us, including American International Group, Inc., have experienced negative developments that could impair their ability to pay any potential claims. As a result, we and Northwest could be exposed to greater losses than anticipated and replacement insurance may have to be obtained at a greater cost, if available.

Execution of Northwest’s capital projects subjects them to construction risks, increases in labor costs and materials, and other risks that may adversely affect financial results.

     A significant portion of Northwest’s growth is accomplished through the construction of new transportation and storage facilities as well as the expansion of existing facilities. Construction of these facilities is subject to various regulatory, development and operational risks, including:

	•		the ability to obtain necessary approvals and permits by regulatory agencies on a timely basis and on acceptable terms;
	•		the availability of skilled labor, equipment, and materials to complete expansion projects;
	•		potential changes in federal, state and local statutes and regulations, including environmental requirements, that prevent a project from proceeding or increase the anticipated cost of the project;
	•		impediments on Northwest’s ability to acquire rights-of-way or land rights on a timely basis and on acceptable terms;
	•		the ability to construct projects within estimated costs, including the risk of cost overruns resulting from inflation or increased costs of equipment, materials, labor or other factors beyond Northwest’s control, that may be material; and
	•		the ability to access capital markets to fund construction projects.

     Any of these risks could prevent a project from proceeding, delay its completion or increase its anticipated costs. As a result, new facilities may not achieve expected investment return, which could adversely affect Northwest’s results of operations, financial position or cash flows and our ability to make distributions to you.

Northwest’s assets and operations can be affected by weather and other natural phenomena.

     Northwest’s assets and operations can be adversely affected by floods, earthquakes, landslides, tornadoes and other natural phenomena and weather conditions, including extreme temperatures, making it more difficult for Northwest to realize the historic rates of return associated with these assets and operations and adversely affecting our ability to make distributions to you. Insurance may be inadequate, and in some instances, Northwest has been unable to obtain insurance on commercially reasonable terms or insurance may not be available. A significant disruption in operations or a significant liability for which Northwest was not fully insured could have a material adverse effect on its business, results of operations and financial condition, and on our ability to make distributions to you.

     Northwest’s customers’ energy needs vary with weather conditions. To the extent weather conditions are affected by climate change or demand is impacted by regulations associated with climate change, customers’ energy use could increase or decrease depending on the duration and magnitude of the changes, leading either to increased investment or decreased revenues.

Acts of terrorism could have a material adverse effect on Northwest’s and our financial condition, results of operations and cash flows.

     Northwest’s assets and the assets of its customers and others may be targets of terrorist activities that could disrupt its business or cause significant harm to its operations, such as full or partial disruption to its ability to transport natural gas. Acts of terrorism as well as events occurring in response to or in connection with acts of terrorism could cause environmental repercussions that could result in a significant decrease in revenues or significant reconstruction or remediation costs, which could have a material adverse effect on Northwest’s financial condition, results of operations and cash flows, and on our ability to make distributions to you.

Institutional knowledge residing with current employees of Northwest nearing retirement eligibility might not be adequately preserved.

     In Northwest’s business, institutional knowledge resides with employees who have many years of service. As these employees reach retirement age, Northwest may not be able to replace them with employees of comparable knowledge and experience. In addition, Northwest may not be able to retain or recruit other qualified individuals and its efforts at knowledge transfer could be inadequate. If knowledge transfer, recruiting and retention efforts are inadequate, access to significant amounts of internal historical knowledge and expertise could become unavailable to Northwest.

Failure of or disruptions to Northwest’s outsourcing relationships might negatively impact its ability to conduct its business.

     Some studies indicate a high failure rate of outsourcing relationships. Although Williams has taken steps to build a cooperative and mutually beneficial relationship with its outsourcing providers and to closely monitor their performance, a deterioration in the timeliness or quality of the services performed by the outsourcing providers or a failure of all or part of these relationships could lead to loss of institutional knowledge and interruption of services necessary for Northwest to be able to conduct its business. The expiration of such agreements or the transition of services between providers could lead to similar losses of institutional knowledge or disruptions.

     Certain of Northwest’s accounting, information technology, application development, and help desk services are currently provided by Williams’ outsourcing provider from service centers outside of the United States. The economic and political conditions in certain countries from which Williams’ outsourcing providers may provide services to Northwest present similar risks of business operations located outside of the United States, including risks of interruption of business, war, expropriation, nationalization, renegotiation, trade sanctions or nullification of existing contracts and changes in law or tax policy, that are greater than in the United States.

Potential changes in accounting standards might cause us to revise our financial results and disclosures in the future, which might change the way analysts measure our business or financial performance.

     Regulators and legislators continue to take a renewed look at accounting practices, financial disclosures, companies’ relationships with their independent registered public accounting firms and retirement plan practices. We cannot predict the ultimate impact of any future changes in accounting regulations or practices in general with respect to public companies or the energy industry or in our operations specifically. In addition, the Financial Accounting Standards Board (“FASB”), the SEC or FERC could enact new accounting standards or FERC orders that might impact how we are required to record revenues, expenses, assets, liabilities and equity.

Risks Inherent in an Investment in Us

Williams Partners controls our general partner, which has sole responsibility for conducting our business and managing our operations. Williams Partners, our general partner, and their respective affiliates have conflicts of interest with us and limited fiduciary duties, and they may favor their own interests to the detriment of our unitholders.

     Williams Partners owns and controls our general partner and appoints all of the directors of our general partner. All of the executive officers and certain directors of our general partner are officers and/or directors of Williams and its affiliates, including Williams Partners’ general partner. Although our general partner has a fiduciary duty to manage us in a manner beneficial to us and our unitholders, the directors and officers of our general partner have a fiduciary duty to manage our general partner in a manner

beneficial to Williams Partners. Therefore, conflicts of interest may arise between Williams and its affiliates, including our general partner and Williams Partners, on the one hand, and us and our unitholders, on the other hand. In resolving these conflicts of interest, our general partner may favor its own interests and the interests of its affiliates over the interests of our unitholders. These conflicts, include, among others, the following factors:

	•		neither our partnership agreement nor any other agreement requires Williams or its affiliates to pursue a business strategy that favors us;
	•		all of the executive officers and certain of the directors of our general partner are also officers and/or directors of Williams and Williams Partners’ general partner, and these persons will also owe fiduciary duties to those entities;
	•		our general partner is allowed to take into account the interests of parties other than us, such as Williams and its affiliates, in resolving conflicts of interest;
	•		Williams Partners owns the remaining 65 percent general partnership interest in Northwest;
	•		Williams Partners owns common and subordinated units representing an aggregate 45.7 percent limited partner interest in us, and if a vote of limited partners is required, Williams Partners will be entitled to vote its units in accordance with its own interests, which may be contrary to our interests or your interests;
	•		our general partner may make a determination to receive a quantity of our Class B common units and additional general partner units in exchange for resetting the target distribution levels related to its incentive distribution rights without the approval of the conflicts committee of our general partner or our unitholders;
	•		all of the executive officers and certain of the directors of our general partner will devote significant time to the business of Williams and/or Williams Partners, and will be compensated by Williams for the services rendered to them;
	•		our general partner determines the amount and timing of our cash reserves, asset purchases and sales, borrowings and issuances of additional partnership securities, each of which can affect the amount of cash that is distributed to unitholders;
	•		our general partner determines the amount and timing of any capital expenditures and, based on the applicable facts and circumstances, whether a capital expenditure is classified as a maintenance capital expenditure, which reduces operating surplus, or an expansion capital expenditure or investment capital expenditure, neither of which reduces operating surplus. This determination can affect the amount of cash that is distributed to our unitholders, including distributions on our subordinated units, and to our general partner with respect to its incentive distribution rights, as well as the ability of the subordinated units to convert to common units;
	•		our general partner determines which costs incurred by it and its affiliates are reimbursable by us;
	•		in some instances, our general partner may cause us to borrow funds in order to permit the payment of cash distributions, even if the purpose or effect of the borrowing is to make a distribution on the subordinated units, to make incentive distributions or to accelerate the expiration of the subordination period;
	•		our partnership agreement does not restrict our general partner from causing us to pay it or its affiliates for any services rendered to us or from entering into additional contractual arrangements with any of these entities on our behalf;
	•		our general partner intends to limit its liability regarding our contractual and other obligations and, in some circumstances, is required to be indemnified by us;
	•		our general partner may exercise its limited right to call and purchase all common units not owned by it and its affiliates if they own more than 75 percent of the common units;
	•		our general partner controls the enforcement of obligations owed to us by it and its affiliates; and
	•		our general partner decides whether to retain separate counsel, accountants or others to perform services for us.

The credit and risk profile of our general partner, Williams Partners and Williams, could adversely affect our or Northwest’s credit ratings, which could increase our or Northwest’s borrowing costs or hinder our or Northwest’s ability to raise capital.

     The credit and business risk profiles of our general partner, Williams Partners and Williams may be factors considered in credit evaluations of us and Northwest. This is because these entities control our business activities, including our cash distribution policy, acquisition strategy and business risk profile. A decline in Williams’ credit rating, such as occurred in 2002, or the in the credit rating of Williams Partners could adversely affect Northwest and us.

     If we were to seek a credit rating in the future, our credit rating may be adversely affected by the leverage of our general partner, Northwest, Williams Partners or Williams, as credit rating agencies such as Standard & Poor’s Ratings Services and Moody’s Investors Service may consider the leverage and credit profile of these entities because of their ownership interest in and control of us and the strong operational links between them and us. If the debt levels of these entities adversely impact our or Northwest’s credit rating, it could increase our or its cost of borrowing or hinder our or its ability to raise financing in the capital markets, which would impair our or its ability to grow our or its business and make distributions.

Our partnership agreement limits our general partner’s fiduciary duties to holders of our common units and subordinated units and restricts the remedies available to holders of our common units and subordinated units for actions taken by our general partner that might otherwise constitute breaches of fiduciary duty.

     Our partnership agreement contains provisions that reduce the fiduciary standards to which our general partner would otherwise be held by state fiduciary duty laws. The limitation and definition of these duties is permitted by the Delaware law governing limited partnerships. In addition, our partnership agreement restricts the remedies available to holders of our limited partner units for actions taken by our general partner that might otherwise constitute breaches of fiduciary duty. For example, our partnership agreement:

	•		permits our general partner to make a number of decisions in its individual capacity, as opposed to in its capacity as our general partner. This entitles our general partner to consider only the interests and factors that it desires, and it has no duty or obligation to give any consideration to any interest of, or factors affecting, us, our affiliates, or any limited partner. Examples include the exercise of its limited call right, its voting rights with respect to the units it owns, its registration rights, its reset rights with respect to our incentive distribution levels, and its determination whether or not to consent to any merger or consolidation of the partnership or amendment to the partnership agreement;
	•		provides that our general partner will not have any liability to us or our unitholders for decisions made in its capacity as a general partner so long as it acted in good faith, meaning it believed the decision was in the best interests of our partnership;
	•		generally provides that affiliated transactions and resolutions of conflicts of interest not approved by the conflicts committee of the board of directors of our general partner and not involving a vote of unitholders must be on terms no less favorable to us than those generally being provided to or available from unrelated third parties or must be “fair and reasonable” to us, as determined by our general partner in good faith, and that, in determining whether a transaction or resolution is “fair and reasonable,” our general partner may consider the totality of the relationships between the parties involved, including other transactions that may be particularly advantageous or beneficial to us;
	•		provides that our general partner, its affiliates and their officers and directors will not be liable for monetary damages to us or our limited partners or assignees for any acts or omissions unless there has been a final and non-appealable judgment entered by a court of competent jurisdiction determining that our general partner or those other persons acted in bad faith or engaged in fraud or willful misconduct; and
	•		provides that in resolving conflicts of interest, it will be presumed that in making its decision our general partner or the conflicts committee of its board of directors acted in good faith, and in any proceeding brought by or on behalf of any limited partner or us, the person bringing or prosecuting such proceeding will have the burden of overcoming such presumption.

     In addition, the general partnership agreement of Northwest contains similar provisions that limit the duties of each partner to the other and to Northwest. To the maximum extent permitted by Delaware law, the Northwest general partnership agreement also provides that the members of the management committee only owe fiduciary duties to the partner that appointed them.

     By purchasing a common unit, a common unitholder will agree to become bound by the provisions in our partnership agreement, including the provisions discussed above. The fiduciary duties of the general partners of Northwest are similarly restricted.

Affiliates of our general partner, including Williams and Williams Partners are not limited in their ability to compete with Northwest or us. Williams is also not obligated to offer us the opportunity to acquire additional assets or businesses from it, which could limit our commercial activities or our ability to grow. In addition, all of the executive officers and certain of the directors of our general partner are also officers and/or directors of Williams and Williams Partners’ general partner, and these persons will also owe fiduciary duties to those entities.

     Neither our partnership agreement nor the omnibus agreement among us, Williams, and certain affiliates of Williams will prohibit affiliates of our general partner, including Williams, Williams Partners and their respective affiliates, from owning assets or engaging in businesses that compete directly or indirectly with Northwest or us. In addition, Williams, Williams Partners, and their respective affiliates may acquire, construct or dispose of additional natural gas transportation or storage assets in the future, without any obligation to offer us the opportunity to purchase or construct any of those assets. Williams may also choose to offer assets to its other affiliates, including Williams Partners, instead of us. Furthermore, all of the executive officers and certain of the directors of our general partner are also officers and/or directors of Williams and Williams Partners’ general partner and will owe fiduciary duties to those entities as well as our unitholders and us.

Holders of our common units have limited voting rights and are not entitled to elect our general partner or its directors, which could reduce the price at which the common units will trade.

     Unlike the holders of common stock in a corporation, unitholders have only limited voting rights on matters affecting our business and, therefore, limited ability to influence management’s decisions regarding our business. Unitholders will have no right to elect our general partner or its board of directors on an annual or other continuing basis. The board of directors of our general partner, including the independent directors, will be chosen entirely by Williams Partners and not by the unitholders. Unlike publicly traded corporations, we will not conduct annual meetings of our unitholders to elect directors or conduct other matters routinely conducted at annual meetings of stockholders. Furthermore, if the unitholders become dissatisfied with the performance of our general partner, they will have little ability to remove our general partner. As a result of these limitations, the price at which the common units will trade could be diminished because of the absence or reduction of a takeover premium in the trading price.

If you are not an Eligible Holder, you will not be entitled to receive distributions or allocations of income or loss on your common units, and your common units will be subject to redemption at a price that may be below the then-current market price.

     We have adopted certain requirements regarding those investors who may own our common and subordinated units. Eligible Holders are individuals or entities subject to United States federal income taxation on the income generated by us or entities not subject to United States federal income taxation on the income generated by us, so long as all of the entity’s owners are subject to such taxation. If you do not meet the requirements to be an Eligible Holder, you will not be entitled to receive distributions or allocations of income and loss on your units and you run the risk of having your units redeemed by us at the lower of your purchase price and the then-current market price. The redemption price will be paid in cash or by delivery of a promissory note, as determined by our general partner.

Our general partner may elect to cause us to issue Class B common units and additional general partner units to it in connection with a resetting of the target distribution levels related to its incentive distribution rights without the approval of the conflicts committee of its board of directors or the holders of our common units. This may result in lower distributions to holders of our common units in certain situations.

     Our general partner has the right to reset the minimum quarterly distribution and the initial target distribution levels upon which the incentive distributions payable to our general partner are based at higher levels based on our cash distribution for the two quarters prior to the exercise of the reset election. Following a reset election by our general partner, the new minimum quarterly distribution amount and target distribution levels will be higher than they were prior to the reset such that incentive distributions to our general partner will be reduced or eliminated until cash distributions per common unit following the reset increase. Our general partner may initially exercise its right to reset the minimum quarterly distribution and target distribution levels at a time when there are no subordinated units outstanding and it has received incentive distributions at the highest level to which it is entitled (48 percent) for each of the prior four consecutive fiscal quarters.

     In connection with resetting these target distribution levels, our general partner will be entitled to receive a number of Class B common units and additional general partner units. The Class B common units will be entitled to the same cash distributions per unit as our common units and will be convertible into an equal number of common units. Our general partner will be issued the number of

Class B common units such that the aggregate cash distribution to be received by our general partner with respect to the newly issued Class B common units and any retained incentive distribution rights immediately following the reset is equivalent to the average of the cash distributions received by our general partner with respect to its incentive distribution rights for the two consecutive fiscal quarters prior to the reset. We anticipate that our general partner would exercise this reset right in order to facilitate acquisitions or internal growth projects that would not be sufficiently accretive to cash distributions per common unit without such exercise. It is possible, however, that our general partner could exercise this reset election at a time when it is experiencing, or expects to experience, declines in the cash distributions it receives related to its incentive distribution rights and may therefore desire to be issued our Class B common units, which are entitled to receive cash distributions from us on the same priority as our common units, rather than retain the right to receive incentive distributions based on the initial target distribution levels. As a result, a reset election may cause our common unitholders to experience a reduction in the amount of cash distributions that they would have otherwise received had we not issued new Class B common units to our general partner in connection with resetting the target distribution levels.

Cost reimbursements to our general partner and its affiliates for services provided to us, which will be determined by our general partner, will be substantial and will reduce our cash available for distribution to you.

     We will reimburse our general partner and its affiliates, including Williams, for various general and administrative services they provide for our benefit, including costs for rendering administrative staff and support services to us, and overhead allocated to us. Our general partner determines the amount of these distributions in its sole discretion. Payments for these services will be substantial and will reduce the amount of cash available for distribution to unitholders. In addition, under Delaware partnership law, our general partner has unlimited liability for our obligations, such as our debts and environmental liabilities, except for our contractual obligations that are expressly made without recourse to our general partner. To the extent our general partner incurs obligations on our behalf, we are obligated to reimburse or indemnify it. If we are unable or unwilling to reimburse or indemnify our general partner, our general partner may take actions to cause us to make payments of these obligations and liabilities. Any such payments could reduce the amount of cash otherwise available for distribution to our unitholders.

Even if unitholders are dissatisfied, they cannot initially remove our general partner without its consent.

     If you are dissatisfied with the performance of our general partner, you will initially have effectively no ability to remove our general partner. The vote of the holders of at least two-thirds of all outstanding common and subordinated units voting together as a single class is required to remove our general partner. Our general partner owns 46.7 percent of our outstanding common and subordinated units. Accordingly, our unitholders cannot remove our general partner without its consent because our general partner owns sufficient units to be able to prevent its removal. Also, if our general partner is removed without cause during the subordination period and units held by our general partner and its affiliates are not voted in favor of that removal, all remaining subordinated units will automatically be converted into common units and any existing arrearages on the common units will be extinguished. In addition, under certain circumstances the successor general partner may be required to purchase the combined general partner interest and incentive distribution rights of the removed general partner, or alternatively, such interests will be converted into common units. A removal of our general partner under these circumstances would adversely affect the common units by prematurely eliminating their distribution and liquidation preference over the subordinated units, which would otherwise have continued until we had met certain distribution and performance tests.

We have a holding company structure in which our subsidiaries conduct our operations and own our operating assets, which may affect our ability to make distributions to you.

     We are a partnership holding company and our operating company owns our only significant asset, which is our 35 percent general partnership interest in Northwest. We have no significant assets other than our 100 percent ownership of our operating company, and its 35 percent general partnership interest in Northwest. As a result, our ability to make distributions to our unitholders depends on the performance of our subsidiaries and their ability to distribute funds to us. The ability of our subsidiaries to make distributions to us may be restricted by, among other things, the provisions of existing and future indebtedness, applicable state partnership and limited liability company laws, and other laws and regulations, including FERC policies.

The control of our general partner may be transferred to a third party without unitholder consent.

     Our general partner may transfer its general partner interest to a third party in a merger or in a sale of all or substantially all of its assets without the consent of the unitholders. Furthermore, our partnership agreement does not restrict the ability of the member or members of our general partner to transfer its or their members’ interests in our general partner to a third party. The new owner or owners of our general partner would then be in a position to replace the board of directors and officers of the general partner with their own choices and to control the decisions taken by the board of directors and officers of the general partner. This effectively permits a “change of control” of the partnership without your vote or consent. In addition, pursuant to the omnibus agreement with Williams, any new owner of the general partner would be required to change our name so that there would be no further reference to Williams.

We may issue additional units without your approval, which would dilute your ownership interests.

     Our partnership agreement does not limit the number of additional limited partner interests that we may issue at any time without the approval of our unitholders. The issuance by us of additional common units or other equity securities of equal or senior rank will have the following effects:

	•		each existing unitholder’s proportionate ownership interest in us will decrease;
	•		the amount of cash available for distribution on each unit may decrease;
	•		because a lower percentage of total outstanding units will be subordinated units, the risk that a shortfall in the payment of the minimum quarterly distribution will be borne by our common unitholders will increase;
	•		the ratio of taxable income to distributions may increase;
	•		the relative voting strength of each previously outstanding unit may be diminished; and
	•		the market price of the common units may decline.

Common units held by our general partner eligible for future sale may adversely affect the price of our common units.

     Our general partner holds an aggregate of 4,700,668 common units and 10,957,900 subordinated units. Our general partner may from time to time, sell all or a portion of its common units or subordinated units. Sales of substantial amounts of its common units or subordinated units, or the anticipation of such sales, could lower the market price of our common units and may make it more difficult for us to sell our equity securities in the future at a time and at a price that we deem appropriate.

Our general partner has a limited call right that may require you to sell your common units at an undesirable time or price.

     If at any time our general partner and its affiliates own more than 75 percent of the common units, our general partner will have the right, which it may assign to any of its affiliates or to us, but not the obligation, to acquire all, but not less than all, of the common units held by unaffiliated persons at a price not less than their then-current market price. As a result, you may be required to sell your common units at an undesirable time or price and may not receive any return on your investment. You may also incur a tax liability upon a sale of your units. Our general partner is not obligated to obtain a fairness opinion regarding the value of the common units to be repurchased by it upon exercise of the limited call right. There is no restriction in our partnership agreement that prevents our general partner from issuing additional common units and exercising its call right. If our general partner exercised its limited call right, the effect would be to take us private and, if the units were subsequently deregistered, we would no longer be subject to the reporting requirements of the Securities Exchange Act of 1934. Our general partner owns approximately 20.8 percent of our outstanding common units. At the end of the subordination period, assuming no additional issuances of common units (other than for the conversion of the subordinated units into common units), our general partner will own approximately 46.7 percent of our outstanding common units.

Our partnership agreement restricts the voting rights of unitholders owning 20 percent or more of our common units.

     Our partnership agreement restricts unitholders’ voting rights by providing that any units held by a person that owns 20 percent or more of any class of units then outstanding, other than our general partner and its affiliates, their transferees and persons who acquired such units with the prior approval of the board of directors of our general partner, cannot vote on any matter. The partnership

agreement also contains provisions limiting the ability of unitholders to call meetings or to acquire information about our operations, as well as other provisions limiting the unitholders ability to influence the manner or direction of management.

Your liability may not be limited if a court finds that unitholder action constitutes control of our business.

     A general partner of a partnership generally has unlimited liability for the obligations of the partnership, except for those contractual obligations of the partnership that are expressly made without recourse to the general partner. Our partnership is organized under Delaware law and we conduct business in a number of other states. The limitations on the liability of holders of limited partner interests for the obligations of a limited partnership have not been clearly established in some of the other states in which we do business. You could be liable for any and all of our obligations as if you were a general partner if a court or government agency were to determine that:

	•		we were conducting business in a state but had not complied with that particular state’s partnership statute; or
	•		your right to act with other unitholders to remove or replace the general partner, to approve some amendments to our partnership agreement or to take other actions under our partnership agreement constitute “control” of our business.

Unitholders may have liability to repay distributions that were wrongfully distributed to them.

     Under certain circumstances, unitholders may have to repay amounts wrongfully returned or distributed to them. Under Section 17-607 of the Delaware Revised Uniform Limited Partnership Act, we may not make a distribution to you if the distribution would cause our liabilities to exceed the fair value of our assets. Delaware law provides that for a period of three years from the date of the impermissible distribution, limited partners who received the distribution and who knew at the time of the distribution that it violated Delaware law will be liable to the limited partnership for the distribution amount. Substituted limited partners are liable for the obligations of the assignor to make contributions to the partnership that are known to the substituted limited partner at the time it became a limited partner and for unknown obligations if the liabilities could be determined from the partnership agreement. Liabilities to partners on account of their partnership interest and liabilities that are non-recourse to the partnership are not counted for purposes of determining whether a distribution is permitted.

If we are deemed an “investment company” under the Investment Company Act of 1940, it would adversely affect the market price of our common units and could have a material adverse effect on our business.

     Our initial asset is a 35 percent general partnership interest in Northwest. If this general partnership interest were to be deemed an “investment security” within the meaning of the Investment Company Act of 1940, we would either have to register as an investment company under the Investment Company Act, obtain exemptive relief from the SEC, or modify our organizational structure or our contract rights to fall outside the definition of an investment company. Although general partner interests are typically not considered securities or “investment securities,” there is a risk that our general partnership interest in Northwest could be deemed an investment security. In that event, it is possible that our ownership of these interests, combined with our assets acquired in the future, could result in our being required to register under the Investment Company Act if we were not successful in obtaining exemptive relief or otherwise modifying our organizational structure or applicable contract rights. Registering as an investment company could, among other things, materially limit our ability to engage in transactions with affiliates, including the purchase and sale of certain securities or other property from or to our affiliates, restrict our ability to borrow funds or engage in other transactions involving leverage and require us to add additional directors who are independent of us or our affiliates. The occurrence of some or all of these events could have an adverse effect on our business and would cause the market price of our common units to decline materially.

     Moreover, treatment of us as an investment company would prevent our qualification as a partnership for federal income tax purposes, in which case we would be treated as a corporation for federal income tax purposes. As a result we would pay federal income tax on our taxable income at the corporate tax rate, distributions to you would generally be taxed again as corporate distributions and none of our income, gains, losses or deductions would flow through to you. Because a tax would be imposed upon us as a corporation, our cash available for distribution to you would be substantially reduced. As a result, treatment of us as an investment company would result in a material reduction in distributions to you, which would materially reduce the value of our common units.

Tax Risks to Common Unitholders

Our tax treatment depends on our status as a partnership for federal income tax purposes, as well as our not being subject to a material amount of entity-level taxation by states and localities. If the Internal Revenue Service (“IRS”) were to treat us as a corporation for federal income tax purposes or if we were to become subject to a material amount of entity-level taxation for state or local tax purposes, the amount of cash available for distribution to our unitholders would be substantially reduced.

     The anticipated after-tax economic benefit of an investment in our common units depends largely on our being treated as a partnership for federal income tax purposes. We have not requested, and do not plan to request, a ruling from the IRS on this or any other tax matter affecting us.

     If we were treated as a corporation for federal income tax purposes, we would pay federal income tax on our taxable income at the corporate tax rate, which currently has a top marginal rate of 35 percent, and would likely pay state and local income tax at the corporate tax rate of the various states and localities imposing a corporate income tax. Distributions to you would generally be taxed again as corporate distributions, and no income, gains, losses, deductions or credits would flow through to you. Because a tax would be imposed upon us as a corporation, our cash available for distribution to you would be substantially reduced. Thus, treatment of us as a corporation would result in a material reduction in the anticipated cash flow and after-tax return to the unitholders, likely causing a substantial reduction in the value of our common units.

     Current law may change, causing us to be treated as a corporation for federal income tax purposes or otherwise subjecting us to entity-level taxation. In addition, because of widespread state budget deficits and other reasons, several states are evaluating ways to subject partnerships to entity-level taxation through the imposition of state income, franchise or other forms of taxation. If any jurisdiction were to impose a tax upon us as an entity, the cash available for distribution to unitholders would be reduced. The partnership agreement provides that if a law is enacted or existing law is modified or interpreted in a manner that subjects us to taxation as a corporation or otherwise subjects us to entity-level taxation for federal, state or local income tax purposes, then the minimum quarterly distribution amount and the target distribution amounts will be adjusted to reflect the impact of that law on us.

The tax treatment of publicly traded partnerships or an investment in our common units could be subject to potential legislative, judicial or administrative changes and differing interpretations, possibly on a retroactive basis.

     The present tax treatment of publicly traded partnerships, including us, or an investment in our common units may be modified by administrative, legislative or judicial interpretation at any time. For example, in response to certain recent developments, members of Congress are considering substantive changes to the definition of qualifying income under Internal Revenue Code Section 7704(d) and the treatment of certain types of income earned from profits interests in partnerships. It is possible that these efforts could result in changes to the existing U.S. tax laws that affect publicly traded partnerships, including us. Modifications to the U.S. federal income tax laws and interpretations thereof may or may not be applied retroactively. We are unable to predict whether any of these changes, or other proposals, will ultimately be enacted. Any such changes could negatively impact the value of an investment in our common units.

We prorate our items of income, gain, loss and deduction between transferors and transferees of the units each month based upon the ownership of the units on the first day of each month, instead of on the basis of the date a particular unit is transferred.

     We prorate our items of income, gain, loss and deduction between transferors and transferees of the common units each month based upon the ownership of the units on the first day of each month, instead of on the basis of the date a particular common unit is transferred. The use of this proration method may not be permitted under existing Treasury Regulations, and, accordingly, our counsel is unable to opine as to the validity of this method. If the IRS were to challenge this method or new Treasury Regulations were issued, we may be required to change the allocation of items of income, gain, loss and deduction among our unitholders.

You will be required to pay taxes on your share of our income even if you do not receive any cash distributions from us.

     Because our unitholders will be treated as partners to whom we will allocate taxable income which could be different in amount than the cash we distribute, you will be required to pay federal income taxes and, in some cases, state and local income taxes on your share of our taxable income, whether or not you receive cash distributions from us. You may not receive cash distributions from us equal to your share of our taxable income or even equal to the actual tax liability that results from your share of our taxable income.

The tax gain or loss on the disposition of our common units could be more or less than expected.

     If you sell your common units, you will recognize gain or loss equal to the difference between the amount realized and your tax basis in those common units. Prior distributions to you in excess of the total net taxable income you were allocated for a common unit, which decreased your tax basis in that common unit, will, in effect, become taxable income to you if our common unit is sold at a price greater than your tax basis in that common unit, even if the price you receive is less than your original cost. A substantial portion of the amount realized, regardless of whether such amount represents gain, may be taxed as ordinary income to you due to potential recapture items, including depreciation recapture. In addition, if you sell your common units, you may incur a tax liability in excess of the amount of cash you receive from the sale.

We will treat each purchaser of common units as having the same tax benefits without regard to the actual common units purchased. The IRS may challenge this treatment, which could adversely affect the value of our common units.

     Because we cannot match transferors and transferees of common units, we will adopt depreciation and amortization positions that may not conform to all aspects of applicable Treasury Regulations. Our counsel is unable to opine as to the validity of such filing positions. A successful IRS challenge to those positions could adversely affect the amount of tax benefits available to you. It also could affect the timing of these tax benefits or the amount of gain from your sale of our common units and could have a negative impact on the value of our common units or result in audit adjustments to your tax returns.

An IRS contest of the federal income tax positions we take may adversely affect the market for our common units, and the cost of any IRS contest will reduce our cash available for distribution to our unitholders and our general partner.

     We have not requested any ruling from the IRS with respect to our treatment as a partnership for federal income tax purposes or any other matter affecting us. The IRS may adopt positions that differ from our counsel’s conclusions or from the federal income tax positions we take. It may be necessary to resort to administrative or court proceedings to sustain some or all of our counsel’s conclusions or the positions we take. A court may not agree with some or all of our counsel’s conclusions or the positions we take. Any contest with the IRS may materially and adversely impact the market for our common units and the price at which they trade. In addition, the costs of any contest with the IRS will result in a reduction in cash available to pay distributions to our unitholders and our general partner, and thus will be borne indirectly by our unitholders and our general partner.

Tax-exempt entities and non-U.S. persons face unique tax issues from owning common units that may result in adverse tax consequences to them.

     Investment in common units by tax-exempt entities, such as individual retirement accounts (known as IRAs), and non-U.S. persons, raises issues unique to them. For example, virtually all of our income allocated to the unit holders who are organizations that are exempt from federal income tax, including IRAs and other retirement plans, may be taxable to them as “unrelated business taxable income”. Distributions to non-U.S. persons will be reduced by withholding taxes at the highest applicable effective tax rate, and non-U.S. persons will be required to file United States federal income tax returns and pay tax on their share of our taxable income.

We have adopted certain valuation methodologies that may result in a shift of income, gain, loss and deduction between the general partner and the unitholders. The IRS may challenge this treatment, which could adversely affect the value of our common units.

     When we issue additional units or engage in certain other transactions, we will determine the fair market value of our assets and allocate any unrealized gain or loss attributable to our assets to the capital accounts of our unitholders and our general partner. Our methodology may be viewed as understating the value of our assets. In that case, there may be a shift of income, gain, loss and deduction between certain unitholders and the general partner, which may be unfavorable to such unitholders. Moreover, under our current valuation methods, subsequent purchasers of common units may have a greater portion of their Internal Revenue Code Section 743(b) adjustment allocated to our tangible assets and a lesser portion allocated to our intangible assets. The IRS may challenge our valuation methods, or our allocation of the Section 743(b) adjustment attributable to our tangible and intangible assets, and allocations of income, gain, loss and deduction between the general partner and certain of our unitholders.

     A successful IRS challenge to these methods or allocations could adversely affect the amount of taxable income or loss being allocated to you. It also could affect the amount of gain from your sale of common units and could have a negative impact on the value of our common units or result in audit adjustments to your tax returns.

The sale or exchange of 50 percent or more of our capital and profits interests within any 12-month period will result in the termination of our partnership for federal income tax purposes.

     We will be considered to have terminated our partnership for federal income tax purposes if there is a sale or exchange of 50 percent or more of the total interests in our capital and profits within a 12-month period. Our termination would, among other things, result in the closing of our taxable year for all unitholders, which would result in us filing two tax returns for one fiscal year. Our termination could also result in a deferral of depreciation deductions allowable in computing our taxable income. In the case of a unitholder reporting on a taxable year other than a fiscal year ending December 31, the closing of our taxable year may also result in more than twelve months of our taxable income or loss being includable in the unitholders’ taxable income for the year of termination. Our termination currently would not affect our classification as a partnership for federal income tax purposes, but instead, we would be treated as a new partnership for tax purposes. If we are treated as a new partnership, we would be required to make new tax elections and could be subject to penalties if we are unable to determine that a termination occurred.

You will likely be subject to state and local taxes and return filing requirements in states or localities where you do not live as a result of investing in our common units.

     In addition to federal income taxes, you will likely be subject to other taxes, such as state and local taxes, unincorporated business taxes and estate, inheritance, or intangible taxes that are imposed by the various jurisdictions in which we do business or own property even if you do not live in any of those jurisdictions. You will likely be required to file state and local income tax returns and pay state and local income taxes in some or all of these various jurisdictions. Further, you may be subject to penalties for failure to comply with those requirements. As we make acquisitions or expand our business, we may own assets or conduct business in additional states or foreign countries that impose a personal income tax or an entity level tax. It is your responsibility to file all federal, state and local tax returns. Our counsel has not rendered an opinion on the state and local tax consequences of an investment in our common units.

Item 1B. Unresolved Staff Comments

     None.

Item 2. Properties

     Northwest owns its system in fee simple. However, a substantial portion of that system is constructed and maintained on and across properties owned by others pursuant to rights-of-way, easements, permits, licenses or consents. Northwest’s compressor stations, with associated facilities, are located in whole or in part upon lands owned by it and upon sites held under leases or permits issued or approved by public authorities. Land owned by others, but used by Northwest under rights-of-way, easements, permits, leases, licenses, or consents, includes land owned by private parties, federal, state and local governments, quasi-governmental agencies, or Native American tribes. The Plymouth LNG facility is located on lands owned in fee simple by Northwest. Various credit arrangements restrict the sale or disposal of a major portion of Northwest’s pipeline system. Northwest leases its corporate offices in Salt Lake City, Utah.

     Williams owns its corporate offices in Tulsa, Oklahoma. We do not own or lease any properties of our own.

Item 3. Legal Proceedings

     The information called for by this item is provided in Part II, Item 8. Financial Statements and Supplementary Data — Northwest Pipeline GP Notes to the Consolidated Financial Statements: Note 4. Contingent Liabilities and Commitments — Legal Proceedings, which information is incorporated into this Item 3 by reference.

Item 4. Submission of Matters to a Vote of Security Holders

     None.

PART II

Item 5. Market for Registrant’s Common Equity, Related Stockholder Matters and Issuer Purchases of Equity Securities.

(a) Market Information

     Our equity consists of a 2 percent general partner interest and a 98 percent limited partner interest. Our limited partner interests are represented by our common units, which are listed on the New York Stock Exchange (“NYSE”) under the trading symbol “WMZ.” The following table sets forth the high and low closing prices of our common units:

		High				Low
2009
Fourth Quarter		$	23.80			$	18.64
Third Quarter			19.30				17.27
Second Quarter			20.40				15.93
First Quarter			17.11				14.20
2008
Fourth Quarter		$	16.00			$	11.57
Third Quarter			17.54				13.59
Second Quarter			18.86				17.26
First Quarter(1)			20.42				15.89

(b) Holders

     On February 17, 2010, there were 22,607,430 common units outstanding, held by approximately 10 holders of record and approximately 10,000 beneficial holders, including common units held in street name and by affiliates of Williams.

     On February 17, 2010, there were 10,957,900 subordinated units outstanding held by a subsidiary of Williams. The subordinated units are not publicly traded.

(c) Cash Distributions

     The following table sets forth the quarterly cash distribution declared and paid on our common units during the periods indicated:

		Cash Distribution per Unit(a)
2009
Fourth Quarter		$	0.3350
Third Quarter			0.3350
Second Quarter			0.3300
First Quarter			0.3250
2008
Fourth Quarter		$	0.3200
Third Quarter			0.3150
Second Quarter			0.3100
First Quarter(b)			0.2242

Cash Distribution Policy

     Our partnership agreement requires that, within 45 days after the end of each quarter, beginning with the quarter ended March 31, 2008, we distribute all of our available cash to unitholders of record on the applicable record date. Available cash, for any quarter, consists of all cash on hand at the end of that quarter:

•

less the amount of cash reserves established by our general partner to:

	•		provide for the proper conduct of our business, including necessary maintenance capital expenditures;
	•		comply with applicable law, any of our debt instruments or other agreements; or
	•		provide funds for distribution to our unitholders and to our general partner for any one or more of the next four quarters;

	•		plus, all cash on hand on the date of determination resulting from cash received after the end of that quarter in respect of our ownership interest in Northwest and attributable to its operations during that quarter; and
	•		plus, if our general partner so determines, all or a portion of cash on hand on the date of determination of available cash for the quarter resulting from working capital borrowings made subsequent to the end of such quarter. Working capital borrowings are generally borrowings that are made under a credit agreement or another arrangement, are used solely for working capital purposes or to pay distributions to unitholders and are intended to be repaid within twelve months.

     Initially, our general partner will be entitled to 2 percent of all quarterly distributions that we make prior to our liquidation. Our general partner also currently holds incentive distribution rights that entitle it to receive increasing percentages, up to a maximum of 50 percent, of the cash we distribute from operating surplus in excess of $0.2875 per unit per quarter. The maximum distribution of 50 percent includes distributions paid to our general partner on its 2 percent general partner interest and assumes that our general partner maintains its general partner interest at 2 percent. The maximum distribution of 50 percent does not include any distributions that our general partner may receive on common or subordinated units that it owns.

     All cash distributed to unitholders will be characterized as either “operating surplus” or “capital surplus.” Our partnership agreement requires that we distribute available cash from operating surplus differently than available cash from capital surplus.

     Upon the closing of our IPO, our general partner received an aggregate of 10,975,900 subordinated units. During the subordination period, the common units will have the right to receive distributions of available cash from operating surplus each quarter in an amount equal to $0.2875 per common unit, which amount is defined in our partnership agreement as the minimum quarterly distribution, plus any arrearages in the payment of the minimum quarterly distribution on the common units from prior quarters, before any distributions of available cash from operating surplus may be made on the subordinated units. Furthermore, no arrearages will be paid on the subordinated units. The practical effect of the subordinated units is to increase the likelihood that during the subordination period there will be sufficient available cash to pay the minimum quarterly distribution on the common units.

     Except as described below the subordination period will extend until the first business day of any quarter beginning after December 31, 2010 that each of the following tests are met: (i) distributions of available cash from operating surplus on the outstanding common units, subordinated units and general partner units equaled or exceeded the sum of the minimum quarterly distributions for each of the three consecutive, non-overlapping four-quarter periods immediately preceding that date; (ii) the “adjusted operating surplus” (as defined in our partnership agreement) for each of the three consecutive, non-overlapping four-quarter periods immediately preceding that date equaled or exceeded the sum of the minimum quarterly distributions on all of the outstanding common units and subordinated units and the related distributions on the general partner units during those periods on a fully diluted basis; and (iii) there are no arrearages in payment of the minimum quarterly distribution on the common units.

     Notwithstanding the foregoing, the subordination period will automatically terminate, and all of the subordinated units will convert into common units on a one-for-one basis, on the first business day following the distribution of available cash to partners in respect of any quarter that each of the following tests are met: (i) distributions of available cash from operating surplus on the outstanding common units, subordinated units and general partner units equaled or exceeded $1.725 (150 percent of the annualized minimum quarterly distribution) for the four-quarter period immediately preceding such date; (ii) the “adjusted operating surplus” (as defined in our partnership agreement) for the four-quarter period immediately preceding that date equaled or exceeded $1.725 (150 percent of the annualized minimum quarterly distribution) on all of the outstanding common units and subordinated units and the related distributions on the general partner units during that period on a fully diluted basis; and (iii) there are no arrearages in payment of the minimum quarterly distribution on the common units.

     If the unitholders remove the general partner without cause, the subordination period may also end before December 31, 2010.

     We will make distributions of available cash from operating surplus for any quarter during the subordination period in the following manner: first, 98 percent to the common unitholders, pro rata, and 2 percent to the general partner, until we distribute for

each outstanding common unit an amount equal to the minimum quarterly distribution for that quarter; second, 98 percent to the common unitholders, pro rata, and 2 percent to the general partner, until we distribute for each outstanding common unit an amount equal to any arrearages in payment of the minimum quarterly distribution on the common units for any prior quarters during the subordination period; third, 98 percent to the subordinated unitholders, pro rata, and 2 percent to the general partner, until we distribute for each subordinated unit an amount equal to the minimum quarterly distribution for that quarter; and thereafter, in the manner described in our partnership agreement.

     Our general partner is entitled to incentive distributions if the amount we distribute with respect to any quarter exceeds specified target levels. If for any quarter we have distributed available cash from operating surplus to the common and subordinated unitholders in an amount equal to the minimum quarterly distribution; and we have distributed available cash from operating surplus on outstanding common units in an amount necessary to eliminate any cumulative arrearages in payment of the minimum quarterly distribution, then our partnership agreement requires that we distribute any additional available cash from operating surplus for that quarter among the unitholders and our general partner in the following manner:

	•		first, 98 percent to all common and subordinated unitholders, pro rata, and 2 percent to our general partner, until each common and subordinated unitholder receives a total of $0.330625 per unit for that quarter, or the first target distribution;
	•		second, 85 percent to all common and subordinated unitholders, pro rata, and 15 percent to our general partner, until each common and subordinated unitholder receives a total of $0.359375 per unit for that quarter, or the second target distribution;
	•		third, 75 percent to all common and subordinated unitholders, pro rata, and 25 percent to our general partner, until each common and subordinated unitholder receives a total of $0.431250 per unit for that quarter, or the third target distribution; and
	•		thereafter, 50 percent to all common and subordinated unitholders, pro rata, and 50 percent to our general partner.

(d) Securities Authorized for Issuance Under Equity Compensation Plans

     See Part III, Item 12. Security Ownership of Certain Beneficial Owners and Management and Related Stockholder Matters.

Item 6. Selected Financial Data

     The following tables show (i) selected financial data of Williams Pipeline Partners and Predecessor (which reflects a 35 percent ownership interest in Northwest) and (ii) selected financial and operating data of Northwest. The following financial data as of December 31, 2009 and 2008, and for the years ended December 31, 2009, 2008 and 2007 was derived from financial statements included herein. All other amounts have been prepared from financial statements not included herein. The information in this selected Financial and Operating Data should be read together with “Management’s Discussion and Analysis of Financial Condition and Results of Operations” for information concerning significant trends in the financial condition and results of operations.

Williams Pipeline Partners L.P. and/or Predecessor

		Years Ended December 31,
		2009				2008				2007				2006				2005
										(Predecessor)				(Predecessor)				(Predecessor)
						(Restated) (B)				(Restated) (B)				(Restated) (B)				(Restated) (B)
		(Thousands of dollars)
Income Statement Data:
Equity earnings from investment in Northwest		$	53,778			$	54,380			$	153,904			$	19,062			$	24,141
Net income			50,821				51,880				153,904				19,062				24,141
Balance Sheet Data (at period end):
Investment in Northwest			441,608				435,103				422,199				306,660				264,721
Total partners’ capital			449,372				441,952				422,199				306,660				264,721
Basic and diluted net income per limited partner unit:
Common units		$	1.53			$	1.45
Subordinated units		$	1.53			$	1.45
Cash Dividends Declared		$	1.31			$	0.8492

Northwest (100%)

		Years Ended December 31,
		2009				2008				2007				2006				2005
						(Restated) (B)				(Restated) (B)				(Restated) (B)				(Restated) (B)
		(Thousands of dollars)
Income Statement Data:
Operating revenues		$	434,379			$	434,854			$	421,851			$	324,250			$	321,457
Net income			153,651				155,371				439,726	(A)			54,462				68,974
Balance Sheet Data (at period end):
Total assets			2,081,277				2,078,812				2,033,596				2,034,748				1,661,324
Long-term debt, including current maturities			693,437				693,240				693,736				687,075				520,080
Total owners’ equity			1,207,150				1,210,547				1,177,098				846,809				728,505
Cash Distributions			135,000				419,342				109,770				—				50,000

(A)		Through September 30, 2007, Northwest used the liability method of accounting for income taxes which required, among other things, provisions for all temporary differences between the financial basis and the tax basis in Northwest’s assets and liabilities and adjustments to the existing deferred tax balances for changes in tax rates. Following Northwest’s conversion to a general partnership on October 1, 2007, Northwest is no longer subject to income tax. On October 1, 2007, Northwest reversed deferred income tax liabilities of approximately $311.8 million to income and $0.2 million of deferred income tax assets to other comprehensive income.
(B)		Our and Northwest’s financial statements have been restated as described in Item 8. Financial Statements and Supplementary Data — Williams Pipeline Partners L.P. Notes to Consolidated Financial Statements: Note 2. Restatement and Northwest Pipeline GP Notes to Consolidated Financial Statements: Note 2. Restatement. Accordingly, Northwest’s 2005, 2006, 2007, and 2008 selected financial data has been restated to reflect the change in accounting treatment. The net impact of the balance sheet corrections resulted in an adjustment to loans to affiliate which have been reclassified to equity. A reconciliation between Northwest’s original basis in its total assets and liabilities and the selected financial data above follows:

		Years Ended December 31,
		2008				2007				2006				2005
						(Thousands of dollars)
Consolidated Balance Sheets:
Total assets, as previously reported		$	2,082,172			$	2,056,471			$	2,049,324			$	1,692,371
Benefit plans correction			3,360				22,875				14,576				31,047
Total assets, as restated		$	2,078,812			$	2,033,596			$	2,034,748			$	1,661,324
Total owners’ equity, as previously reported		$	1,184,714			$	1,185,616			$	857,945			$	756,346
Net (increase) decrease of benefit plans correction			(25,833	)			8,518				11,136				27,841
Total owners’ equity, as restated		$	1,210,547			$	1,177,098			$	846,809			$	728,505

Item 7. Management’s Discussion and Analysis of Financial Condition and Results of Operations

Overview

     We are a growth-oriented Delaware limited partnership formed on August 31, 2007 by Williams to own and operate natural gas transportation and storage assets. We own a 35 percent general partnership interest in Northwest, a subsidiary of Williams that owns an approximate 3,900-mile, bi-directional, interstate natural gas pipeline system that extends from the San Juan Basin in New Mexico, through the Rocky Mountains and to the northwestern United States. Northwest also has working natural gas storage capacity of approximately 13.0 Bcf. The remaining 65 percent general partnership interest in Northwest is owned by a subsidiary of Williams.

     Our general partnership interest in Northwest is our only asset. As a result, we are dependent on Northwest for substantially all of our cash available for distribution and the management’s discussion and analysis of financial condition and results of operations contained herein is primarily focused on Northwest.

     On January 20, 2010, we concluded that our financial statements for the year ended December 31, 2008 should be restated due to the manner in which Northwest presented and recognized pension and postretirement obligations in certain benefit plans for which Williams is the plan sponsor. Northwest previously recorded allocated amounts related to these plans on a single-employer basis rather than a multi-employer accounting model. As the plan assets are not legally segregated and Northwest is not contractually required to assume these obligations upon withdrawal, Northwest has now concluded that the appropriate accounting model for these historical financial statements is a multi-employer model. The restatement did not have an impact on our 2008 or 2007 Net Income as Northwest’s expense recognized approximated its contributions to the Williams-sponsored plans, nor did it have any impact on our 2008 or 2007 Consolidated Statements of Cash Flows.

     For a discussion of additional information on the restatement, see Item 8. Financial Statements and Supplementary Data — Williams Pipeline Partners L.P. Notes to Consolidated Financial Statements: Note 2. Restatement.

     On February 17, 2010, Williams completed a strategic restructuring to contribute certain of its midstream and pipeline assets, including its 45.7 percent limited partner interest in us, its 100 percent ownership interest in our general partner, and its 65 percent interest in Northwest to Williams Partners L.P. (“Williams Partners”), an affiliate of Williams and of us, in exchange for cash and units in Williams Partners (the “Dropdown”). As part of the strategic restructuring, Williams Partners announced its intention to commence an exchange offer for any and all of our outstanding common units not held by Williams Partners or its affiliates at a future date following the consummation of the Dropdown. The exact timing of the launch of such offer was stated to be dependent on the filing of necessary documentation with the SEC and upon market conditions, but it was announced that it would be at a fixed exchange ratio of 0.7584 of its common units for each our common units.

How We Evaluate Our Operations

     We evaluate our business on the basis of a few key measures:

	•		the level of capacity reserved under Northwest’s long-term firm transportation and storage contracts;
	•		the level of revenues provided by Northwest’s short-term firm and interruptible transportation and storage services;
	•		Northwest’s operating expenses; and
	•		our and Northwest’s cash available for distribution.

Long-Term Firm Service

     Northwest competes for transportation and storage customers based on the specific type of service a customer needs, operating flexibility, available capacity and price. To the extent Northwest’s customers believe that Northwest can offer these services at rates, terms and conditions that are more attractive than those of its competition, they will be more inclined to purchase Northwest’s services. Firm transportation service requires Northwest to reserve pipeline capacity for a customer at certain receipt and delivery points. Firm customers generally pay a “demand” or “capacity reservation” charge based on the amount of capacity being reserved regardless of whether the capacity is used, plus a volumetric fee and an in-kind fuel reimbursement based on the volume of natural gas transported. Firm storage customers reserve a specific amount of storage capacity, including injection and withdrawal rights, and generally pay a capacity reservation charge based on the amount of capacity reserved. Capacity reservation revenues derived from long-term firm service contracts generally remain constant over the term of the contracts, subject to adjustment in rate proceedings with FERC, because the revenues are primarily based upon the capacity reserved and not whether the capacity is actually used. Northwest’s ability to maintain or increase the amount of long-term firm service it provides is key to assuring a consistent revenue stream.

Short-Term Firm and Interruptible Service

     A small portion of Northwest’s revenues is generated by short-term firm and interruptible services under which customers pay fees for transportation, storage or other related services. Of Northwest’s revenues for the twelve months ended December 31, 2009, approximately 4.4 percent were derived from short-term firm and interruptible services.

Seasonality

     Although Northwest delivers more gas to its market areas in the winter heating season months of November through March, because a significant percentage of Northwest’s revenues are collected through reservation fees, its revenues remain fairly stable from quarter to quarter. The table below sets forth seasonal revenues, expenses and throughput for each quarter and the total year ended December 31, 2009.

2009		Jan-Mar				Apr-Jun				Jul-Sep				Oct-Dec				Total
Revenues ($ in 000)		$	111,548			$	107,756			$	106,615			$	108,460			$	434,379
Revenue %			25.7	%			24.8	%			24.5	%			25.0	%			100	%
Operating Expenses ($ in 000)		$	58,396			$	60,743			$	57,470			$	57,261			$	233,870
Throughput (TBtu)(1)			224				173				166				206				769
Throughput %			29.1	%			22.5	%			21.6	%			26.8	%			100	%

Northwest’s Operating Expenses

     Northwest’s operating expenses typically do not vary significantly based upon the amount of natural gas it transports. While expenses may not materially vary with throughput, the timing of Northwest’s spending during a year can be dictated by weather and customer demands. During the winter months, Northwest’s pipeline average throughput is higher. As a result, Northwest typically does not perform compressor or pipeline maintenance until off-peak periods, which generally results in higher costs in the second and third quarters compared to the other two quarters. Northwest is also regulated by the federal government and certain state and local

laws which can impact the activities it performs on its pipeline. Changes in these regulations or Northwest’s assessment of the condition of inspected facilities can increase costs. As an example, the Pipeline Safety Improvement Act of 2002 set new standards for pipelines in assessing the safety and reliability of their pipeline infrastructure. Northwest and other pipelines have incurred additional costs to meet these standards. Certain of Northwest’s markets are served by other interstate natural gas pipelines and Northwest needs to operate its system efficiently and reliably to effectively compete for transportation and storage services.

Our Cash Available for Distribution

     We define our cash available for distribution as our net income, less equity earnings from investment in Northwest, plus a general and administrative expense credit and cash available for distribution from Northwest.

Northwest’s Cash Available for Distribution

     Under the Northwest general partnership agreement, on or before the end of the calendar month following each quarter, the management committee of Northwest is required to review the amount of available cash with respect to that quarter and distribute 100 percent of the available cash to the partners in accordance with their percentage interests, subject to limited exceptions. Available cash is generally defined for Northwest as the sum of all cash and cash equivalents on hand at the end of the quarter, plus cash on hand from working capital borrowings made subsequent to the end of that quarter (as determined by Northwest’s management committee), less cash reserves established by Northwest’s management committee as necessary or appropriate for the conduct of Northwest’s business and to comply with any applicable law or agreements.

     In accordance with Williams’ restructuring of its business, Northwest’s participation in the Williams’ cash management program was terminated. In February 2010, Northwest’s management committee authorized a cash distribution which included the amount of Northwest’s outstanding advances as of January 31, 2010. Accordingly, the balance outstanding at December 31, 2009 is reflected as a reduction of Northwest’s Owners’ Equity as the advances will not be available to Northwest as working capital. As a result of the restructuring, Northwest will become a participant in the Williams Partners cash management program.

Factors that Impact Northwest’s Business

     The high percentage of Northwest’s revenues derived from capacity reservation fees on long-term, contractual arrangements helps mitigate the risk of revenue fluctuations due to near-term changes in natural gas supply and demand conditions and price volatility. Northwest’s business can, however, be negatively affected by sustained downturns or sluggishness in the economy in general, and is impacted by shifts in supply and demand dynamics, the mix of services requested by its customers, competition and changes in regulatory requirements affecting its operations.

     We believe the key factors that impact Northwest’s business are the supply of and demand for natural gas in the markets in which Northwest operates, Northwest’s customers and their requirements, and government regulation of natural gas pipelines. These key factors, described in “Narrative Description of Business” in Part I, Item 1. Business, play an important role in how Northwest manages its operations and implements its long-term strategies.

     We believe the collective impact of these key factors may result in an increasingly competitive natural gas transportation market. This could result in a reduction in the overall average life of Northwest’s long-term firm contracts which could adversely affect its revenue over the long term. We also believe the impact of such factors described in “Northwest’s Customers” and “Northwest’s Competition” in Part I, Item 1. Business, may also provide Northwest with growth opportunities. These factors may also result in a need for increased capital expenditures to take advantage of opportunities to bring additional supplies of natural gas into Northwest’s system to maintain or possibly increase its transportation commitments and volumes.

Northwest’s Operations

     Northwest owns and operates a natural gas pipeline system that extends from the San Juan Basin in northwestern New Mexico and southwestern Colorado through Colorado, Utah, Wyoming, Idaho, Oregon and Washington to a point on the Canadian border near Sumas, Washington. Northwest’s system includes approximately 3,900 miles of mainline and lateral transmission pipeline and 41 transmission compressor stations. Northwest’s compression facilities have a combined sea level-rated capacity of approximately 473,000 horsepower. At December 31, 2009, Northwest had long-term firm transportation contracts, including peaking service, with aggregate capacity reservations of approximately 3.7 Bcf of natural gas per day. Northwest also has approximately 13.0 Bcf of working natural gas storage capacity through its one-third interest in the Jackson Prairie underground storage facility, its ownership of the Plymouth LNG storage facility and contract storage at Clay Basin.

     Transportation Services. Northwest’s transportation services consist primarily of a) firm transportation under long-term contracts, whereby the customer pays a capacity reservation charge to reserve pipeline capacity at certain receipt and delivery points on the system, plus a volumetric fee and an in-kind fuel reimbursement based on the volume transported; and b) interruptible transportation, whereby the customer pays to transport natural gas when capacity is available and used. Firm transportation capacity reservation revenues typically do not vary over the term of the contract, subject to adjustment in rate proceedings with FERC, because the

revenues are primarily based upon the capacity reserved, and not upon the capacity actually used. Northwest generates a small portion of its revenues from short-term firm and interruptible transportation services.

     Northwest is not generally in the business of buying and selling natural gas, but changes in the price of natural gas can affect the overall supply and demand for natural gas, which in turn can affect its results of operations. Northwest depends on the availability of competitively priced natural gas supplies that its customers desire to ship through its system. Northwest delivers natural gas for a broad mix of customers including LDCs, municipal utilities, direct industrial users, electric power generators and natural gas marketers and producers.

     Storage Services. Northwest’s natural gas storage services allow it to offer customers a high degree of flexibility in meeting their delivery requirements and enable Northwest to balance daily receipts and deliveries. For example, LDCs use traditional storage services by injecting natural gas into storage in the summer months when natural gas prices are typically lower and then withdrawing the natural gas during the winter months in order to reduce their exposure to the potential volatility of winter natural gas prices. Northwest offers firm storage service, in which the customer reserves and pays for a specific amount of storage capacity, including injection and withdrawal rights, and interruptible storage service, where the customer receives and pays for capacity only when it is available and used.

Outlook

     The overall economic recession and challenging financial markets during the past year have impacted our and Northwest’s business. In the current economic environment, many financial markets, institutions and other businesses remain under considerable stress. These events continue to impact our and Northwest’s business. However, we note the following:

	•		Northwest has no significant debt maturities until 2016.
	•		As of December 31, 2009, Northwest has approximately $66.8 million of available cash from return of advances made to affiliates and available capacity under its Credit Facility. (See further discussion in Management’s Discussion and Analysis of Financial Condition and Northwest’s Results of Operations — Method of Financing.)
	•		A significant portion of Northwest’s transportation and storage services are provided pursuant to long-term firm contracts that obligate its customers to pay Northwest monthly capacity reservation fees regardless of the amount of pipeline or storage capacity actually utilized by a customer.

     Northwest’s strategy to create value focuses on maximizing the contracted capacity on its pipeline by providing high quality, low cost natural gas transportation and storage services to its markets. Changes in commodity prices and volumes transported have little impact on revenues because the majority of its revenues are recovered through firm capacity reservation charges. Northwest grows its business primarily through expansion projects that are designed to increase its access to natural gas supplies and to serve the demand growth in its markets. See Part 1, Item 1. Business — Capital Projects.

Critical Accounting Policies, Estimates, Judgments and Sensitivities

     The accounting policies discussed below are considered by Northwest’s management to be critical to an understanding of its financial statements as their application places the most significant demands on management’s judgment.

Regulatory Accounting

     Northwest is regulated by FERC. The Accounting Standards Codification Topic 980, Regulated Operations (“Topic 980”) provides that rate-regulated public utilities account for and report regulatory assets and liabilities consistent with the economic effect of the way in which regulators establish rates if the rates established are designed to recover the costs of providing the regulated service and if the competitive environment makes it probable that such rates can be charged and collected. Accounting for businesses that are regulated and apply the provisions of Topic 980 can differ from the accounting requirements for non-regulated businesses. Transactions that are recorded differently as a result of regulatory accounting requirements include the capitalization of an equity return component on regulated capital projects, capitalization of other project costs, retirements of general plant assets, employee related benefits, environmental costs, negative salvage, asset retirement obligations and other costs and taxes included in, or expected to be included in, future rates. As a rate-regulated entity, Northwest’s management has determined that it is appropriate to apply the accounting prescribed by Topic 980 and, accordingly, the accompanying consolidated financial statements include the effects of the types of transactions described above that result from regulatory accounting requirements. Northwest’s management uses judgment in determining the probability that regulatory assets will be recoverable from, or regulatory liabilities will be refunded to, customers. A summary of regulatory assets and liabilities is included in Item 8. Financial Statements and Supplementary Data — Northwest Pipeline GP Notes to Consolidated Financial Statements: Note 11. Regulatory Assets and Liabilities.

Contingencies

     Northwest records liabilities for estimated loss contingencies when a loss is probable and the amount of the loss can be reasonably estimated. Revisions to contingent liabilities are reflected in income in the period in which different facts or information become known or circumstances change that affect previous assumptions with respect to the likelihood or amount of loss. Liabilities for contingent losses are based upon management’s assumptions and estimates regarding the probable outcomes of the matters. Should the outcomes differ from the assumptions and estimates, revisions to the liabilities for contingent losses would be required.

Environmental Liabilities

     Northwest’s environmental liabilities are based on Northwest management’s best estimate of the undiscounted future obligation for probable costs associated with environmental assessment and remediation of Northwest’s operating sites. These estimates are based on evaluations and discussions with counsel and independent consultants, and the current facts and circumstances related to these environmental matters. Northwest’s accrued environmental liabilities could change substantially in the future due to factors such as the nature and extent of any contamination, changes in remedial requirements, technological changes, discovery of new information, and the involvement of and direction taken by the EPA, FERC and other governmental authorities on these matters. Northwest continues to conduct environmental assessments and is implementing a variety of remedial measures that may result in increases or decreases in the total estimated environmental costs.

Northwest’s Results of Operations

     In the following discussion of the results of Northwest, all amounts represent 100 percent of the operations of Northwest, in which we hold a 35 percent general partnership interest. As such, we recognized equity earnings from investments of $53.8 million for 2009 compared with $54.4 million for 2008.

Analysis of Financial Results

     This analysis discusses financial results of Northwest’s operations for the years 2009, 2008 and 2007. Variances due to changes in natural gas prices and transportation volumes have little impact on revenues, because under Northwest’s rate design methodology, the majority of overall cost of service is recovered through firm capacity reservation charges in Northwest’s transportation rates.

		Years Ended December 31,
		2009				2008				2007
		(Thousands of dollars)
Income Statement Data:
Operating revenues		$	434,379			$	434,854			$	421,851
Operating expenses:
General and administrative			64,657				60,403				65,772
Operation and maintenance			71,085				72,831				66,847
Depreciation			86,373				86,184				84,731
Regulatory credits			(2,403	)			(2,617	)			(3,663	)
Taxes, other than income taxes			14,158				16,875				13,997
Regulatory liability reversal			—				—				(16,562	)
Total operating expenses			233,870				233,676				211,122
Operating income			200,509				201,178				210,729
Other income - net			1,951				1,623				25,437
Interest charges:
Interest on long-term debt			44,439				42,290				46,828
Other interest			5,414				5,571				5,585
Allowance for borrowed funds used during construction			(1,044	)			(431	)			(1,306	)
Total interest charges			48,809				47,430				51,107
Income before income taxes			153,651				155,371				185,059
Benefit for income taxes			—				—				(254,667	)
Net income		$	153,651			$	155,371			$	439,726

Years Ended December 31, 2008 and 2009

     Operating revenues decreased $0.5 million, or less than one percent, for the year ended December 31, 2009 as compared to the year ended December 31, 2008. This decrease is primarily attributed to $4.4 million lower revenues due to the termination of the Parachute Lateral lease agreement on August 1, 2009, and was mostly offset by higher transportation revenues of $1.7 million resulting primarily from an increase in firm transportation under long-term contracts and higher storage revenues of $2.6 million resulting primarily from incremental reservation charges associated with the Jackson Prairie deliverability expansion that was placed in service on November 1, 2008. The decrease in the Parachute Lateral lease revenues is substantially offset by a decrease in lease expense described below.

     Northwest’s transportation service accounted for 96 percent of its operating revenues for each of the years ended December 31, 2009 and 2008. Additionally, gas storage service accounted for 4 percent and 3 percent of operating revenues for the years ended December 31, 2009 and 2008, respectively.

     Operating expenses increased $0.2 million, or less than one percent. This increase is due primarily to i) higher pension expense of $4.0 million, ii) higher allocated overhead from Williams of $3.0 million attributed primarily to higher pension expense, and iii) higher labor of $1.6 million attributed primarily to pipeline maintenance. These increases were mostly offset by i) lower taxes, other than income taxes, of $2.7 million primarily attributed to lower than anticipated property tax settlements and lower sales and use taxes resulting from lower fuel usage and a refund of taxes from prior years, ii) lower lease expense of $1.3 million attributed to the restructuring of the Salt Lake City headquarters building lease, and iii) $4.3 million lower expense from the termination of the Parachute Lateral lease agreement.

     Other income — net increased $0.3 million, or 20 percent, due primarily to higher allowance for equity funds used during construction of $1.2 million attributed to higher capital expenditures in 2009, partially offset by lower interest income from affiliates of $0.7 million attributed to lower interest rates on advances to affiliates.

     Interest charges increased $1.4 million, or 3 percent, due primarily to the May 2008 refinancing of the $250.0 million revolver debt with the issuance of $250.0 million of 6.05 percent senior unsecured notes.

Years Ended December 31, 2007 and 2008

     Operating revenues increased $13.0 million, or 3 percent, for the year ended December 31, 2008 as compared to the year ended December 31, 2007. This increase is attributed to a $3.9 million increase from the Parachute Lateral, placed into service in May 2007, and a $5.2 million increase from short-term firm transportation services, with the balance of the increase primarily attributed to certain small customers converting to large customer status resulting in higher reservation charges and to higher transportation volumes.

     Northwest’s transportation service accounted for 96 percent of its operating revenues for each of the years ended December 31, 2008 and 2007. Natural gas storage service accounted for 3 percent of operating revenues for each of the years ended December 31, 2008 and 2007.

     Operating expenses increased $22.6 million, or 11 percent, from 2007 to 2008. This increase is due primarily to the June 2007 reversal of Northwest’s pension regulatory liability of $16.6 million as described in Item 8. Financial Statements and Supplementary Data — Northwest Pipeline GP Notes to Consolidated Financial Statements: Note 1. Summary of Significant Accounting Policies, and the new Parachute Lateral lease of $10.1 million, which began January 1, 2008. Also contributing were higher use taxes of $1.0 million attributed primarily to the 2007 reversal of $0.8 million of accrued use taxes resulting from the settlement of prior year audits, and higher depreciation of $1.5 million and ad valorem taxes of $1.6 million resulting from property additions. These increases were partially offset by lower expenses of $5.0 million for contracted services attributed primarily to pipeline maintenance, lower overhead allocated by Williams of $2.0 million and lower bonus accruals and deferred compensation of $1.0 million primarily attributed to lower bonus and deferred compensation levels in 2008.

     Operating income decreased $9.6 million, or 5 percent, from 2007 to 2008, due to the reasons discussed above.

     Other income decreased $23.8 million, or 94 percent, from 2007 to 2008, primarily due to the recognition in 2007 of $6.0 million of previously deferred income, the receipt of $12.2 million additional contract termination income, and $2.3 million additional interest related to the termination of the Grays Harbor transportation agreement. Also contributing to this decrease was a $2.2 million decrease in interest income from affiliates resulting primarily from lower interest rates and a $2.3 million decrease in the allowance for equity funds used during construction (“EAFUDC”) resulting from the lower capital expenditures in 2008 and the discontinuance of EAFUDC gross-ups after Northwest’s conversion to a partnership on October 1, 2007. These decreases were partially offset by the $1.3 million write-off of a regulatory asset associated with the Parachute Lateral in 2007.

     Interest charges decreased $3.7 million, or 7 percent, from 2007 to 2008, due primarily to the April 2007 early retirement of $175.0 million of 8.125 percent senior unsecured notes, the December 2007 refinancing of $250.0 million of 6.625 percent senior unsecured notes with $250.0 million revolver debt at lower interest rates, and the May 2008 refinancing of the $250.0 million revolver debt with the issuance of $250.0 million of 6.05 percent senior unsecured notes. This decrease was partially offset by the April 2007 issuance of $185.0 million of 5.95 percent senior unsecured notes and a $0.9 million decrease in the allowance for borrowed funds used during construction resulting from lower capital expenditures in 2008.

     The benefit for income taxes decreased $254.7 million to $0 from 2007 to 2008 due to Northwest’s conversion to a non-taxable general partnership on October 1, 2007. Prior to the conversion, Northwest recognized $57.1 million of tax expense resulting in an effective tax rate of 37.8 percent. At the date of conversion, Northwest recognized income tax benefit of $311.8 million reflecting the removal of its net deferred tax liabilities.

Capital Resources and Liquidity of Northwest

     Northwest’s ability to finance operations (including funding capital expenditures and acquisitions), to meet its debt obligations and to refinance indebtedness depends on its ability to generate future cash flows and to borrow funds. Northwest’s ability to generate cash is subject to a number of factors, some of which are beyond its control, including the impact of regulators’ decisions on the rates Northwest is able to establish for its transportation and storage services.

     On or before the end of the calendar month following each quarter, available cash is distributed to Northwest’s partners as required by its general partnership agreement. Available cash is generally defined for Northwest as the sum of all cash and cash equivalents on hand at the end of the quarter, plus cash on hand from working capital borrowings made subsequent to the end of that quarter (as determined by Northwest’s management committee), less cash reserves established by Northwest’s management committee as necessary or appropriate for the conduct of Northwest’s business and to comply with any applicable law or agreements. During 2009, Northwest distributed $135.0 million of available cash to its partners.

     In accordance with Williams’ restructuring of its business, Northwest’s participation in the Williams’ cash management program was terminated. In February 2010, Northwest’s management committee authorized a cash distribution which included the amount of Northwest’s outstanding advances as of January 31, 2010. Accordingly, the balance outstanding at December 31, 2009 is reflected as a reduction of Northwest’s Owners’ Equity as the advances will not be available to Northwest as working capital. As a result of the restructuring, Northwest will become a participant in the Williams Partners cash management program.

     Northwest funds its capital requirements with cash from operating activities, third party debt and contributions from its partners with the exception of the CHC Project, which was funded by capital contributions from Williams. Through December 31, 2009, Northwest received $49.2 million in capital contributions from Williams to fund the CHC Project.

Sources (Uses) of Cash

		Years Ended December 31,
		2009				2008				2007
		(Thousands of dollars)
Net cash provided (used) by:
Operating activities		$	234,798			$	239,014			$	205,357
Financing activities			(83,608	)			(126,848	)			(142,523	)
Investing activities			(151,133	)			(112,318	)			(63,826	)
Increase (decrease) in cash and cash equivalents		$	57			$	(152	)		$	(992	)

Operating Activities

     Northwest’s net cash provided by operating activities in 2009 decreased $4.2 million from 2008. This decrease is primarily attributed to changes in other noncurrent assets and liabilities and working capital, partially offset by an increase in its cash operating results.

     Northwest’s net cash provided by operating activities in 2008 increased from 2007 due primarily to the increase in its cash operating results, offset by the absence of the receipt of contract terminations proceeds of $14.5 million in 2007, and from changes in working capital.

Financing Activities

     2009

	•		Northwest paid distributions of $135.0 million to its partners.
	•		Northwest received $49.2 million in capital contributions from Williams for the CHC Project.

     2008

	•		Northwest issued $250 million aggregate principal amount of 6.05 percent senior unsecured notes due 2018.
	•		Northwest repaid the $250 million borrowed under the Williams’ revolving credit agreement in 2007.
	•		Northwest received proceeds of $300.9 million from the sale of partnership interest.
	•		Northwest paid distributions of $419.3 million to its partners.

     2007

	•		Northwest issued $185 million aggregate principal amount of 5.95 percent senior unsecured notes due 2017.
	•		Northwest borrowed $250 million under the Williams’ revolving credit agreement.
	•		Northwest retired $175 million of 8.125 percent senior unsecured notes due 2010.

	•		Northwest retired $250 million of 6.625 percent senior unsecured notes due 2007.
	•		Northwest paid distributions of $109.8 million to Williams.

Investing Activities

     2009

•

Capital expenditures totaled $152.6 million, primarily related to normal maintenance and compliance projects and the CHC Project.

     2008

	•		Capital expenditures totaled $88.5 million, primarily related to normal maintenance and compliance and the expansion of the Jackson Prairie storage facility.
	•		Northwest advanced $26.9 million to Williams.

     2007

	•		Capital expenditures totaled $156.8 million, primarily related to normal maintenance and compliance.
	•		Northwest received $79.8 million of proceeds from the sale of the Parachute Lateral to an affiliate.
	•		Northwest received $10.9 million repayment of advances made to Williams.

Method of Financing

Working Capital

     Working capital is the amount by which current assets exceed current liabilities. Northwest’s working capital requirements will be primarily driven by changes in accounts receivable and accounts payable. These changes are primarily impacted by such factors as credit and the timing of collections from customers and the level of spending for maintenance and expansion activity.

     Changes in the terms of Northwest’s transportation and storage arrangements have a direct impact on Northwest’s generation and use of cash from operations due to their impact on net income, along with the resulting changes in working capital. A material adverse change in operations or available financing may impact Northwest’s ability to fund its requirements for liquidity and capital resources.

     During 2009, Northwest made distributions of available cash of $135.0 million to its partners, representing cash in excess of working capital requirements and reserves established by its management committee as necessary for the conduct of its business.

Short-Term Liquidity

     Northwest funds its working capital and capital requirements with cash flows from operating activities, and, if required, borrowings under the Williams credit agreement (described below) and return of advances made to Williams.

     Northwest invests cash through participation in Williams’ cash management program. At December 31, 2009 and 2008, the advances due to Northwest by Williams totaled approximately $66.8 million and $66.0 million, respectively. The advances are represented by one or more demand obligations. Historically, the interest rate on intercompany demand notes was based upon the weighted average cost of Williams’ debt outstanding at the end of each quarter, which was 7.83 percent at December 31, 2007. Beginning in 2008, the interest rate on these demand notes was based upon the overnight investment rate paid on Williams’ excess cash, which was approximately, 0.05 percent and zero percent at December 31, 2009 and 2008, respectively.

     In accordance with Williams’ restructuring of its business, Northwest’s participation in the Williams’ cash management program was terminated. In February 2010, Northwest’s management committee authorized a cash distribution which included the amount

of Northwest’s outstanding advances as of January 31, 2010. Accordingly, the balance outstanding at December 31, 2009 is reflected as a reduction of Northwest’s Owners’ Equity as the advances will not be available to Northwest as working capital. As a result of the restructuring, Northwest will become a participant in the Williams Partners cash management program.

Credit Agreement

     Williams has an unsecured, $1.5 billion credit facility with a maturity date of May 1, 2012 (“Credit Facility”). Prior to the Williams’ restructuring, Northwest had access to $400 million under the Credit Facility to the extent not otherwise utilized by Williams. Williams expects that its ability to borrow under the Credit Facility is reduced by $70 million due to the bankruptcy of a participating bank. Consequently, Northwest expects its ability to borrow under the Credit Facility is reduced by approximately $18.7 million. Interest is calculated based on a choice of two methods: a fluctuating rate equal to the lender’s base rate plus an applicable margin, or a periodic fixed rate equal to the London Interbank Offered Rate (LIBOR) plus an applicable margin. Williams is required to pay a commitment fee (currently 0.125 percent) based on the unused portion of the Credit Facility. The margins and commitment fee are generally based on the specific borrower’s senior unsecured long-term debt ratings. As of December 31, 2009, there were no letters of credit issued by the participating institutions and no revolving credit loans outstanding. In December 2007, Northwest borrowed $250.0 million under this Credit Facility to repay $250.0 million in 6.625 percent senior notes at maturity. In May 2008, the loan of $250 million was repaid with proceeds from the issuance of $250 million of 6.05 percent senior unsecured notes due 2018. Northwest did not borrow under the Credit Facility in 2008 or 2009. See Item 8. Financial Statements and Supplementary Data – Northwest Pipeline GP Notes to Consolidated Financial Statements.

     The Credit Facility contains a number of restrictions on the business of the borrowers, including Northwest. These restrictions include restrictions on the borrowers’ and their subsidiaries’ ability to: (i) grant liens securing indebtedness; (ii) merge, consolidate, or sell, lease or otherwise transfer assets; (iii) incur indebtedness; and (iv) engage in transactions with related parties. Northwest and Williams are also required to maintain a ratio of debt to capitalization of not more than 0.55 to 1, in Northwest’s case, and 0.65 to 1, in the case of Williams. The Credit Facility also contains affirmative covenants and events of default. If any borrower breaches financial or certain other covenants or if an event of default occurs, the lenders may cause the acceleration of the borrower’s indebtedness and may terminate lending to all borrowers under the Credit Facility. Additionally, if: (a) a borrower were to generally not pay its debts as such debts come due or admit in writing its inability to pay its debts generally; (b) a borrower were to make a general assignment for the benefit of its creditors; or (c) proceedings relating to the bankruptcy or receivership of any borrower were to remain unstayed or undismissed for 60 days, then all lending under the credit agreement would terminate and all indebtedness outstanding under the Credit Facility would be accelerated.

     On February 17, 2010, Williams completed a strategic restructuring, pursuant to which Williams contributed substantially all of its domestic midstream and pipeline businesses, which includes Northwest, into Williams Partners. Northwest is now a partially-owned subsidiary of Williams Partners.

     As part of the restructuring, Northwest was removed as a borrower under the Credit Facility, and on February 17, 2010, Northwest entered into a new $1.75 billion three-year senior unsecured revolving credit facility (the “New Credit Facility”) with Williams Partners and Transcontinental Gas Pipe Line Company, LLC (“Transco”), as co-borrowers, and Citibank N.A., as administrative agent, and certain other lenders named therein. The full amount of the New Credit Facility is available to Williams Partners, and may be increased by up to an additional $250 million. Northwest may borrow up to $400 million under the New Credit Facility to the extent not otherwise utilized by Williams Partners and Transco. At closing, Williams Partners borrowed $250 million under the New Credit Facility to repay the term loan outstanding under its existing senior unsecured credit agreement.

     Interest on borrowings under the New Credit Facility is payable at rates per annum equal to, at the option of the borrower: (1) a fluctuating base rate equal to Citibank, N.A.’s adjusted base rate plus the applicable margin, or (2) a periodic fixed rate equal to LIBOR plus the applicable margin. The adjusted base rate will be the highest of (i) the federal funds rate plus 0.5 percent, (ii) Citibank N.A.’s publicly announced base rate, and (iii) one-month LIBOR plus 1.0 percent. Williams Partners pays a commitment fee (currently 0.5 percent) based on the unused portion of the New Credit Facility. The applicable margin and the commitment fee are determined by reference to a pricing schedule based on a borrower’s senior unsecured debt ratings.

     The New Credit Facility contains various covenants that limit, among other things, a borrower’s and its respective subsidiaries’ ability to incur indebtedness, grant certain liens supporting indebtedness, merge or consolidate, sell all or substantially all of its assets, enter into certain affiliate transactions, make certain distributions during an event of default, and allow any material change in the nature of its business.

     Under the New Credit Facility, Williams Partners is required to maintain a ratio of debt to EBITDA (each as defined in the New Credit Facility) of no greater than 5.00 to 1.00 for itself and its consolidated subsidiaries. For Northwest and its consolidated subsidiaries, the ratio of debt to capitalization (defined as net worth plus debt) is not permitted to be greater than 55%. Each of the above ratios will be tested beginning June 30, 2010 at the end of each fiscal quarter, and the debt to EBITDA ratio is measured on a rolling four-quarter basis.

     The New Credit Facility includes customary events of default, including events of default relating to non-payment of principal, interest or fees, inaccuracy of representations and warranties in any material respect when made or when deemed made, violation of covenants, cross-payment defaults, cross acceleration, bankruptcy and insolvency events, certain unsatisfied judgments and a change of control. If an event of default with respect to a borrower occurs under the New Credit Facility, the lenders will be able to terminate the commitments for all borrowers and accelerate the maturity of the loans of the defaulting borrower under the New Credit Facility and exercise other rights and remedies.

Long-Term Financing

     Northwest may raise capital through private debt offerings, as well as offerings registered pursuant to offering-specific registration statements. Interest rates, market conditions, and industry conditions will affect future amounts raised, if any, in the capital markets. Northwest anticipates that it will be able to access public and private debt markets on terms commensurate with its credit ratings to finance its capital requirements, when needed.

Capital Requirements

     The transmission and storage business can be capital intensive, requiring significant investment to maintain and upgrade existing facilities and construct new facilities.

     Northwest categorizes its capital expenditures as either maintenance capital expenditures or expansion capital expenditures. Maintenance capital expenditures are those expenditures required to maintain the existing operating capacity and service capability of Northwest’s assets, including replacement of system components and equipment that are worn, obsolete, completing their useful life, or necessary to remain in compliance with environmental laws and regulations. Expansion capital expenditures improve the service capability of the existing assets, increase transmission or storage capacities from existing levels, or enhance revenues. Northwest anticipates 2010 capital expenditures will be between $120 million and $140 million of which includes $60 million to $80 million for maintenance capital and $95 million to $115 million considered nondiscretionary due to legal, regulatory and/or contractual requirements. The maintenance capital portion of Northwest’s 2009 capital expenditures was $84.0 million. In 2010, Northwest expects to fund its capital expenditures with cash from operations, with the exception of the final costs for the CHC Project which will be funded by capital contributions from Williams.

     Northwest’s expenditures for property, plant and equipment additions were $156.6 million, $78.6 million and $157.2 million for 2009, 2008 and 2007, respectively. The $78.0 million increase from 2008 to 2009 is primarily attributed to expenditures related to pipeline integrity, the CHC Project, and the Sundance Trail Expansion Project.

Credit Ratings

     During 2009, the credit ratings on Northwest’s senior unsecured long-term debt remained unchanged with investment grade ratings from all three agencies, as shown below:

Moody’s Investors Service		Baa2
Standard and Poor’s		BBB–
Fitch Ratings		BBB

     At December 31, 2009 and through the date of this report, the evaluation of Northwest’s credit rating is “stable” from Moody’s Investors Service and Fitch Ratings. On January 12, 2010, Standard and Poor’s revised Northwest’s ratings outlook to “positive” from “stable.”

     With respect to Moody’s, a rating of “Baa” or above indicates an investment grade rating. A rating below “Baa” is considered to have speculative elements. A “Ba” rating indicates an obligation that is judged to have speculative elements and is subject to substantial credit risk. The “1”, “2” and “3” modifiers show the relative standing within a major category. A “1” indicates that an

obligation ranks in the higher end of the broad rating category, “2” indicates a mid-range ranking, and “3” indicates a ranking at the lower end of the category.

     With respect to Standard and Poor’s, a rating of “BBB” or above indicates an investment grade rating. A rating below “BBB” indicates that the security has significant speculative characteristics. A “BB” rating indicates that Standard and Poor’s believes the issuer has the capacity to meet its financial commitment on the obligation, but adverse business conditions could lead to insufficient ability to meet financial commitments. Standard and Poor’s may modify its ratings with a “+” or a “-” sign to show the obligor’s relative standing within a major rating category.

     With respect to Fitch, a rating of “BBB” or above indicates an investment grade rating. A rating below “BBB” is considered speculative grade. A “BB” rating from Fitch indicates that there is a possibility of credit risk developing, particularly as the result of adverse economic change over time; however, business or financial alternatives may be available to allow financial commitments to be met. Fitch may add a “+” or a “-” sign to show the obligor’s relative standing within a major rating category.

Other

Contractual Obligations

     The table below summarizes the maturity dates of Northwest’s more significant contractual obligations and commitments as of December 31, 2009 (in millions of dollars):

		2010				2011-2012				2013-2014				Thereafter				Total
Long-term debt, including current portion:
Principal		$	—			$	—			$	—			$	695.0			$	695.0
Interest			44.4				88.9				88.9				165.5				387.7
Operating leases			2.3				4.6				4.5				11.8				23.2
Purchase obligations:
Natural gas purchase, storage, transportation and construction			27.1				4.6				4.1				—				35.8
Other			0.1				0.3				0.3				6.7				7.4
Other long-term liabilities, including current portion(1)(2)			1.5				3.0				3.3				—				7.8
Total		$	75.4			$	101.4			$	101.1			$	879.0			$	1,156.9

Off-Balance Sheet Arrangements

     Neither we nor Northwest have any guarantees of off-balance sheet debt to third parties and maintain no debt obligations that contain provisions requiring accelerated payment of the related obligations in the event of specified levels of declines in Williams’ or Northwest’s credit ratings.

Impact of Inflation

     Northwest has generally experienced increased costs in recent years due to the effect of inflation on the cost of labor, benefits, materials and supplies, and property, plant and equipment. A portion of the increased labor and materials and supplies costs can directly affect income through increased operating and maintenance costs. The cumulative impact of inflation over a number of years has resulted in increased costs for current replacement of productive facilities. The majority of the costs related to Northwest’s property, plant and equipment and materials and supplies is subject to rate-making treatment, and under current FERC practices, recovery is limited to historical costs. While amounts in excess of historical cost are not recoverable under current FERC practices, Northwest believes it may be allowed to recover and earn a return based on the increased actual costs incurred when existing facilities are replaced. However, cost-based regulation along with competition and other market factors limit Northwest’s ability to price services or products to ensure recovery of inflation’s effect on costs.

Environmental Matters

     As discussed in Item 8. Financial Statements and Supplementary Data — Northwest Pipeline GP Notes to Consolidated Financial Statements: Note 4. Contingent Liabilities and Commitments, Northwest is subject to extensive federal, state and local environmental laws and regulations which affect its operations related to the construction and operation of its pipeline facilities. Northwest considers environmental assessment and remediation costs and costs associated with compliance with environmental standards to be recoverable through rates, as they are prudent costs incurred in the ordinary course of business. To date, Northwest has been permitted recovery of environmental costs incurred, and it is Northwest’s intent to continue seeking recovery of such costs, as incurred, through rate filings.

Safety Matters

     Please see Item 8. Financial Statements and Supplemental Data — Northwest Pipeline GP Notes to Consolidated Financial Statements: Note 4. Contingent Liabilities and Commitments for information about pipeline integrity regulations.

Legal Matters

     Northwest is party to various legal actions arising in the normal course of business. Northwest’s management believes that the disposition of outstanding legal actions will not have a material adverse impact on its future liquidity or financial condition. Please see Item 8. Financial Statements and Supplementary Data — Northwest Pipeline GP Notes to Consolidated Financial Statements: Note 4. Contingent Liabilities and Commitments.

Regulatory Proceedings

     Please see Item 8. Financial Statements and Supplementary Data — Northwest Pipeline GP Notes to Consolidated Financial Statements: Note 3. Rate and Regulatory Matters and Note 4. Contingent Liabilities and Commitments for information about regulatory and business developments which cause operating and financial uncertainties.

Summary

     Litigation, arbitration, regulatory matters, environmental matters, and safety matters are subject to inherent uncertainties. Were an unfavorable ruling to occur, there exists the possibility of a material adverse impact on the results of operations in the period in which the ruling occurs. Northwest’s management, including internal counsel, currently believes that the ultimate resolution of the foregoing matters, taken as a whole and after consideration of amounts accrued, insurance coverage, recovery from customers or other indemnification arrangements, will not have a material adverse effect on Northwest’s future liquidity or financial position.

Liquidity and Capital Resources of Williams Pipeline Partners L.P.

     Our principal source of liquidity is cash distributed to us by Northwest. We expect to fund our operating expenses, debt service and cash distributions primarily with distributions from Northwest. As of December 31, 2009, we had cash and cash equivalents of $8.1 million.

     Prior to the completion of the restructuring on February 17, 2010, we were able to invest cash through participation in Williams’ cash management program. Any advances were represented by one or more demand obligations. The interest rate on the demand notes was based upon the overnight investment rate paid on Williams’ excess cash, which was 0.05 percent at December 31, 2009. Subsequent to the restructuring, we may invest cash through the participation in the Williams Partners cash management program.

Northwest Distributions

     In January 2008, Northwest distributed $8.8 million to Williams representing available cash prior to our acquisition of our interest in Northwest. During 2008, Northwest declared and paid equity distributions of $109.6 million to its partners. Of this amount, $7.8 million represents the portion allocated to its partners prior to our acquisition. During 2009, Northwest distributed $135.0 million of available cash to its partners.

Capital Contributions from Williams

     Capital contributions from Williams required under the omnibus agreement consist of a quarterly credit for general and administrative expenses. The annual amounts of those credits are as follows: $1.5 million in 2009, $1.0 million in 2010 and $0.5 million in 2011.

Credit Facility

     At the closing of the IPO on January 24, 2008, we entered into a $20 million working capital credit agreement with Williams as the lender. The facility was available exclusively to fund working capital borrowings. The initial maturity date of the facility was January 23, 2009. We exercised our automatic right to extend the facility for an additional 365-day term in January 2009. The new maturity date was January 23, 2010. This facility is terminated since we did not exercise our automatic right to extend the facility in January 2010. At December 31, 2009, we have no outstanding borrowings under the working capital credit facility.

Cash Distributions to Unitholders

     We have paid quarterly distributions to unitholders and our general partner after every quarter since our IPO on January 24, 2008. Our last quarterly distribution of $11.5 million was paid on February 12, 2010 to unitholders of record at the close of business on February 5, 2010.

Item 7A. Quantitative and Qualitative Disclosures About Market Risk

Interest Rate Risk

     Our interest rate risk indirectly includes Northwest’s long-term debt. All of Northwest’s interest on long-term debt is fixed in nature, except the interest on Northwest’s revolver borrowings, as shown on the following table (in thousands of dollars):

		December 31, 2009
Fixed rates on long-term debt:
5.95% senior unsecured notes due 2017		$	185,000
6.05% senior unsecured notes due 2018			250,000
7.00% senior unsecured notes due 2016			175,000
7.125% senior unsecured notes due 2025			85,000
			695,000
Unamortized debt discount			1,563
Total long-term debt		$	693,437

     Northwest’s total long-term debt at December 31, 2009 had a carrying value of $693.4 million and a fair market value of $753.2 million. As of December 31, 2009 the weighted-average interest rate on Northwest’s long-term debt was 6.4 percent. Northwest expects to have sensitivity to interest rate changes with respect to future debt facilities and its ability to prepay existing facilities.

Credit Risk

     Northwest is, and therefore we are, exposed to credit risk. Credit risk relates to the risk of loss resulting from the nonperformance by a customer of its contractual obligations. Our and Northwest’s exposure generally relates to receivables and unbilled revenue for services provided, as well as volumes owed by customers for imbalances of natural gas lent by Northwest to them generally under Northwest’s parking and lending services and no-notice services. Northwest maintains credit policies intended to minimize credit risk and actively monitor these policies.

Market Risk

     Northwest’s primary exposure to market risk occurs at the time the primary terms of existing transportation and storage contracts expire and are subject to termination. Upon expiration of the primary terms, Northwest’s contracts generally continue on a year to year basis, but are subject to termination by its customers. In the event of termination, Northwest may not be able to obtain replacement contracts at favorable rates or on a long-term basis. In the event that Northwest is not able to obtain replacement contracts, Northwest would seek to recover revenue shortfalls in a subsequent rate case.

Item 8. Financial Statements and Supplementary Data

Index to Financial Statements

		Page
Williams Pipeline Partners L.P.
Management’s Report on Internal Control Over Financial Reporting			58
Report of Independent Registered Public Accounting Firm on Internal Control Over Financial Reporting			59
Report of Independent Registered Public Accounting Firm			60
Consolidated Statements of Income for the years ended December 31, 2009, 2008, and 2007			61
Consolidated Balance Sheets at December 31, 2009 and 2008			62
Consolidated Statements of Cash Flows for the years ended December 31, 2009, 2008 and 2007			63
Consolidated Statement of Partners’ Capital for the years ended December 31, 2009, 2008 and 2007			64
Notes to Consolidated Financial Statements			65
Northwest Pipeline GP
Management’s Report on Internal Control Over Financial Reporting			71
Report of Independent Registered Public Accounting Firm			72
Consolidated Statements of Income for the years ended December 31, 2009, 2008 and 2007			73
Consolidated Balance Sheets at December 31, 2009 and 2008			74
Consolidated Statements of Owners’ Equity for the years ended December 31, 2009, 2008 and 2007			75
Consolidated Statements of Comprehensive Income for the years ended December 31, 2009, 2008 and 2007			76
Consolidated Statements of Cash Flows for the years ended December 31, 2009, 2008 and 2007			77
Notes to Consolidated Financial Statements			78

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). Our internal controls over financial reporting are designed to provide reasonable assurance to our management and board of directors regarding the preparation and fair presentation of financial statements in accordance with accounting principles generally accepted in the United States. 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 of our assets; (ii) provide reasonable assurance that transactions are recorded as to permit preparation of financial statements in accordance with generally accepted accounting principles, and that our receipts and expenditures are being made only in accordance with authorization of our management and board of directors; and (iii) provide reasonable assurance regarding prevention or timely detection of unauthorized acquisition, use or disposition of our assets that could have a material effect on our financial statements.

     All internal control systems, no matter how well designed, have inherent limitations including the possibility of human error and the circumvention or overriding of controls. Therefore, even those systems determined to be effective can provide only reasonable assurance with respect to financial statement preparation and presentation.

     Under the supervision and with the participation of our management, including our general partner’s Chief Executive Officer and Chief Financial Officer, we assessed the effectiveness of our internal control over financial reporting as of December 31, 2009, based on the criteria set forth by the Committee of Sponsoring Organizations of the Treadway Commission (“COSO”) in Internal Control — Integrated Framework. Previously, our management had concluded that our internal control over financial reporting was effective for the period ended December 31, 2008. In the first quarter of 2010, we identified a material weakness related to the manner in which we presented and recognized pension and post retirement related activity associated with our investment in Northwest. We hold a 35% interest in Northwest, which is our primary asset/business activity.

     A material weakness is a deficiency, or combination of deficiencies, in internal control over financial reporting, such that there is a reasonable possibility that a material misstatement of the annual or interim financial statements will not be prevented or detected on a timely basis.

     As discussed further in Note 2 of the Notes to Consolidated Financial Statements, Northwest had previously recorded parent-allocated amounts related to these plans on a single-employer basis rather than a multi-employer accounting model. As the plan assets are not legally segregated and Northwest is not contractually required to assume these obligations upon withdrawal, Northwest has now concluded that the appropriate accounting model for its historical financial statements is a multi-employer model. The error was significant to the Statement of Comprehensive Income for the period ended December 31, 2008. The impact of the correction also increased Owner’s Equity and reduced non-current assets and liabilities. It did not have an impact on our 2008 Net Income, nor did it have any impact on our 2008 Statement of Cash Flows.

     Based upon our current assessment, which considered the material weakness described above, our management concluded that our internal control over financial reporting was not effective at December 31, 2008. Our management also concluded that our internal control over financial reporting was not effective at December 31, 2009.

     Northwest has corrected its method of accounting to the multi-employer model, and this change is reflected in our financial statements for the period ended December 31, 2009. Northwest has also enhanced its controls that ensure proper selection and application of generally accepted accounting principles.

     Ernst & Young LLP, our independent registered public accounting firm, has audited our internal control over financial reporting, as stated in their report which is included in this Annual Report on Form 10-K.

REPORT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM
ON INTERNAL CONTROL OVER FINANCIAL REPORTING

Board of Directors of Williams Pipeline GP LLC

     We have audited Williams Pipeline Partners L.P.’s internal control over financial reporting as of December 31, 2009, based on criteria established in Internal Control—Integrated Framework issued by the Committee of Sponsoring Organizations of the Treadway Commission (the COSO criteria). Williams Pipeline Partners L.P.’s management is responsible 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 an opinion on the company’s internal control over financial reporting based on our audit.

     We conducted our audit in accordance with the standards of the Public Company Accounting Oversight Board (United States). Those standards require that we plan and perform the audit to obtain reasonable assurance about whether effective internal control over financial reporting was maintained in all material respects. Our audit included obtaining an understanding of internal control over financial reporting, assessing the risk that a material weakness exists, testing and evaluating the design and operating effectiveness of internal control based on the assessed risk, and performing such other procedures as we considered necessary in the circumstances. We believe that our audit provides a reasonable basis for our opinion.

     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 (1) pertain to the maintenance of records that, in reasonable detail, accurately and fairly reflect the transactions and dispositions of the assets of the company; (2) 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 (3) 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.

     A material weakness is a deficiency, or combination of deficiencies, in internal control over financial reporting, such that there is a reasonable possibility that a material misstatement of the company’s annual or interim financial statements will not be prevented or detected on a timely basis. The following material weakness has been identified and included in management’s assessment. Management has identified a material weakness related to the manner in which they presented and recognized certain pension and post retirement related activity associated with their equity investee, for which the Partnership holds a 35% interest and is their primary asset. This material weakness was considered in determining the nature, timing, and extent of audit tests applied in our audit of the 2009 financial statements, and this report does not affect our report dated February 23, 2010 on those financial statements.

     In our opinion, because of the effect of the material weakness described above on the achievement of the objectives of the control criteria, Williams Pipeline Partners L.P. has not maintained effective internal control over financial reporting as of December 31, 2009, based on the COSO criteria.

/s/ Ernst & Young LLP

Houston, Texas
February 23, 2010

REPORT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

Board of Directors of Williams Pipeline GP LLC

     We have audited the accompanying consolidated balance sheets of Williams Pipeline Partners L.P. as of December 31, 2009 and 2008, and the related consolidated statements of income, partners’ capital, and cash flows for each of the three years in the period ended December 31, 2009. These financial statements are the responsibility of the Partnership’s management. Our responsibility is to express an opinion on these financial statements based on our 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 audit to obtain reasonable assurance about whether the financial statements are free of material misstatement. An audit includes examining, on a test basis, evidence supporting the amounts and disclosures in the financial statements. An audit also includes assessing the accounting principles used and significant estimates made by management, as well as evaluating the overall financial statement presentation. We believe that our audits provide a reasonable basis for our opinion.

     In our opinion, the financial statements referred to above present fairly, in all material respects, the consolidated financial position of Williams Pipeline Partners L.P. at December 31, 2009 and 2008, and the consolidated results of its operations and its cash flows for each of the three years in the period ended December 31, 2009 in conformity with U.S. generally accepted accounting principles.

     As discussed in Note 2 to the consolidated financial statements, the Partnership restated its consolidated balance sheet as of December 31, 2008 and the related consolidated statement of partners’ capital for each of the two years then ended, as a result of its proportionate share of other comprehensive income from its equity investee, whereby the equity investee restated its financial statements for the correction of an error related to pension and other postretirement benefit obligations in certain benefit plans for which their parent, The Williams Companies, Inc., is the plan sponsor.

     We also have audited, in accordance with the standards of the Public Company Accounting Oversight Board (United States), Williams Pipeline Partners L.P.’s internal control over financial reporting as of December 31, 2009, based on criteria established in Internal Control-Integrated Framework issued by the Committee of Sponsoring Organizations of the Treadway Commission and our report dated February 23, 2010 expressed an adverse opinion thereon.

/s/ Ernst & Young LLP

Houston, Texas
February 23, 2010

WILLIAMS PIPELINE PARTNERS L.P.

CONSOLIDATED STATEMENTS OF INCOME

		Years Ended December 31,
		2009				2008				2007
										(Predecessor)
		(Thousands of dollars, except per-unit amounts)
General and administrative expense		$	2,915			$	2,520			$	—
Earnings from Northwest Pipeline GP through January 23, 2008 (Predecessor)			—				4,002				153,904
Equity earnings from investment in Northwest Pipeline GP after January 23, 2008			53,778				50,378				—
Interest expense — affiliate			(50	)			(47	)			—
Interest income			8				67				—
Net income		$	50,821			$	51,880			$	153,904
Allocation of net income used for earnings per unit calculation:
Net income		$	50,821			$	51,880
Net income applicable to the period through January 23, 2008			—				4,002
Net income applicable to the period after January 23, 2008			50,821				47,878
Allocation of net loss to general partner			(432	)			(879	)
Allocation of net income to limited partners		$	51,253			$	48,757
Basic and diluted net income per limited partner unit:
Common units		$	1.53			$	1.45
Subordinated units		$	1.53			$	1.45
Weighted average number of units outstanding:
Common units			22,607,430				22,606,010
Subordinated units			10,957,900				10,957,900

See accompanying notes to consolidated financial statements.

WILLIAMS PIPELINE PARTNERS L.P.

CONSOLIDATED BALANCE SHEETS

		December 31,
		2009				2008
						(Restated)
		(Thousands of dollars)
ASSETS
Current assets:
Cash and cash equivalents		$	8,114			$	7,760
Prepaid expense			193				184
Total current assets			8,307				7,944
Investment in Northwest Pipeline GP			441,608				435,103
Total assets		$	449,915			$	443,047
LIABILITIES AND PARTNERS’ CAPITAL
Current liabilities:
Accounts payable:
Trade		$	419			$	671
Affiliate			124				424
Total current liabilities			543				1,095
Contingent liabilities and commitments
Partners’ capital:
Common unitholders (22,607,430 units outstanding at December 31, 2009 and 2008)			296,932				292,015
Subordinated unitholders (10,957,900 units outstanding at December 31, 2009 and 2008)			143,513				141,136
Accumulated other comprehensive loss			(42	)			(20	)
General partner			8,969				8,821
Total partners’ capital			449,372				441,952
Total liabilities and partners’ capital		$	449,915			$	443,047

See accompanying notes to consolidated financial statements.

WILLIAMS PIPELINE PARTNERS L.P.

CONSOLIDATED STATEMENTS OF CASH FLOWS

		Years Ended December 31,
		2009				2008				2007
										(Predecessor)
		(Thousands of dollars)
OPERATING ACTIVITIES:
Net income		$	50,821			$	51,880			$	153,904
Adjustments to reconcile to cash provided by operations:
Equity earnings from investment in Northwest Pipeline GP			(53,778	)			(54,380	)			(153,904	)
Distributions related to equity earnings from investment in Northwest Pipeline GP			47,250				41,454				—
Cash provided (used) by changes in assets and liabilities:
Other current assets			(9	)			(184	)			—
Accounts payable			(552	)			1,095				—
Other			13				114				—
Net cash provided by operating activities			43,745				39,979				—
INVESTING ACTIVITIES:
Purchase of 15.9% general partnership interest in Northwest Pipeline GP			—				(300,900	)			—
Net cash used by investing activities			—				(300,900	)			—
FINANCING ACTIVITIES:
Distributions paid			(44,891	)			(34,896	)			—
Proceeds from sale of common units			—				336,520				—
Offering costs			—				(3,797	)			—
Redemption of common units held by general partner			—				(31,020	)			—
Contribution pursuant to the omnibus agreement			1,500				1,874				—
Net cash provided by financing activities			(43,391	)			268,681				—
Increase in cash and cash equivalents			354				7,760				—
Cash and cash equivalents at beginning of period			7,760				—				—
Cash and cash equivalents at end of period		$	8,114			$	7,760			$	—
SCHEDULE OF NONCASH FINANCING ACTIVITIES:
Contribution of 19.1% in Northwest Pipeline GP		$	—			$	(115,020	)		$	—
Issuance of units to Williams Pipeline GP LLC			—				115,020				—

See accompanying notes to consolidated financial statements.

WILLIAMS PIPELINE PARTNERS L.P.

CONSOLIDATED STATEMENT OF PARTNERS’ CAPITAL

																		Accumulated
		Pre-IPO																Other				Total
		Owner’s				Limited Partner								General				Comprehensive				Partners’
		Equity				Common				Subordinated				Partner				Income				Capital
		(Thousands of dollars)
		(Unaudited)
Balance — January 1, 2007 (Predecessor) (Restated)		$	306,660			$	—			$	—			$	—			$	—			$	306,660
Net income			153,904				—				—				—				—				153,904
Cash distributions			(38,420	)			—				—				—				—				(38,420	)
Other comprehensive income:
Gain (loss) on cash flow hedges, net of reclassification adjustments			(22	)			—				—				—				—				(22	)
Elimination of deferred income taxes			77				—				—				—				—				77
Balance — December 31, 2007 (Predecessor) (Restated)			422,199				—				—				—				—				422,199
Net income attributable to the period through January 23, 2008			4,002				—				—				—				—				4,002
Pre-IPO distribution			(3,088	)			—				—				—				—				(3,088	)
Distribution of Pre-IPO funds made in April 2008			(2,723	)			—				—				—				—				(2,723	)
Other comprehensive loss attributable to the period through January 23, 2008			(2	)			—				—				—				—				(2	)
Balance — January 23, 2008 (Predecessor) (Restated)			420,388				—				—				—				—				420,388
Contribution of net assets of predecessor companies			(115,020	)			(26,392	)			133,094				8,318				—				—
Adjustment to contribution of net assets of predecessor companies			2,723				(1,798	)			(871	)			(54	)			—				—
Restatement adjustment to contribution of net assets of predecessor companies			(7,191	)			4,746				2,301				144				—				—
Purchase of 15.9% general partnership interest in Northwest Pipeline GP			(300,900	)			—				—				—				—				(300,900	)
Issuance of units to public			—				336,520				—				—				—				336,520
Offering costs			—				(3,797	)			—				—				—				(3,797	)
Redemption of common units by general partner			—				(31,020	)			—				—				—				(31,020	)
Other comprehensive income attributable to the period January 24 through December 31, 2008:
Net unrealized gain on cash flow hedge			—				—				—				—				(20	)			(20	)
Total other comprehensive income																							(20	)
Net income attributable to the period January 24 through December 31, 2008			—				32,839				15,918				(879	)			—				47,878
Cash distributions			—				(19,197	)			(9,306	)			(582	)			—				(29,085	)
Contributions pursuant to the omnibus agreement			—				—				—				1,874				—				1,874
Other			—				114				—				—				—				114
Balance — December 31, 2008 (Restated)			—				292,015				141,136				8,821				(20	)			441,952
Net income			—				34,521				16,732				(432	)			—				50,821
Other comprehensive income:
Net unrealized gain on cash flow hedge			—				—				—				—				(22	)			(22	)
Total other comprehensive income																							(22	)
Cash distributions			—				(29,616	)			(14,355	)			(920	)			—				(44,891	)
Contributions pursuant to the omnibus agreement			—				—				—				1,500				—				1,500
Other			—				12				—				—				—				12
Balance — December 31, 2009		$	—			$	296,932			$	143,513			$	8,969			$	(42	)		$	449,372