8-K

UNITED STATES
SECURITIES AND EXCHANGE COMMISSION

WASHINGTON, D.C. 20549

FORM 8-K

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

Date of Report (Date of earliest event reported): January 31, 2007

NORTHWEST PIPELINE CORPORATION

(Exact name of registrant as specified in its charter)

Delaware	1-7414	87-0269236
(State or other jurisdiction of incorporation)	(Commission File Number)	(I.R.S. Employer Identification No.)

295 Chipeta Way, Salt Lake City, Utah	84108
(Address of principal executive offices)	(Zip Code)

Registrant’s telephone number, including area code: 801-583-8800

Not Applicable
(Former name or former address, if changed since last report)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions:

o Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)

o Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240-14a-12)

o Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))

o Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

TABLE OF CONTENTS

	Item 7.01 Regulation FD Disclosure
	Item 9.01. Financial Statements and Exhibits.
SIGNATURE
INDEX TO EXHIBITS
Press Release

Item 7.01 Regulation FD Disclosure

On January 31, 2007, Northwest Pipeline Corporation announced it had filed a stipulation and settlement agreement that resolves all outstanding issues in its pending rate case (RP06-416) which was filed on June 30, 2006, with the Federal Energy Regulatory Commission (FERC).

The settlement is based on an annual cost of service of $404 million and establishes that general system firm transportation (TF-1 Large) rates on the Northwest Pipeline system will increase from $.30760 to $.40984 per dekatherm, effective Jan. 1, 2007.

The settlement is subject to FERC approval. Northwest anticipates the approval process will be completed by mid-2007.

The press release announcing the filing of the stipulation and settlement is furnished herewith as Exhibit 99.1 and is incorporated by reference.

Item 9.01. Financial Statements and Exhibits.

(a) Financial Statements of Businesses Acquired.

Not applicable.

(b) Pro Forma Financial Information.

Not applicable.

(c) Shell Company Transactions.

Not applicable.

(d) Exhibits.

Exhibit 99.1 Press release dated January 31, 2007.

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SIGNATURE

     Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.

NORTHWEST PIPELINE CORPORATION
By:	/s/ Brian K. Shore
	Name:	Brian K. Shore
	Title:	Corporate Secretary

Dated: February 1, 2007

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INDEX TO EXHIBITS

EXHIBIT
NUMBER	DESCRIPTION
99.1	Press release dated January 31, 2007.

4

EX-99.1

Exhibit 99.1

NewsRelease

Date: January 31, 2007

Williams’ Northwest Pipeline Announces Filing of Rate Case Settlement

TULSA, Okla. — Williams’ (NYSE:WMB) Northwest Pipeline announced today it has filed a stipulation and settlement agreement that resolves all outstanding issues in its pending rate case (RP06-416) which was filed on June 30, 2006, with the Federal Energy Regulatory Commission (FERC). The settlement between Northwest and the intervening parties in the case, including Northwest’s customers, is supported by the FERC staff and is expected to be uncontested.

This was the first general rate increase sought by Northwest in ten years and was filed to reflect an increase in revenue requirements, including recovery of the $333 million Capacity Replacement Project in the state of Washington.

“We are pleased to have reached a settlement with our customers and FERC staff,” said Phil Wright, president of Williams Gas Pipelines. “We believe the settlement is fair and provides rate certainty for Northwest and its customers for the next few years.”

The settlement is based on an annual cost of service of $404 million and establishes that general system firm transportation (TF-1 Large) rates on the Northwest Pipeline system will increase from $.30760 to $.40984 per dekatherm, effective Jan. 1, 2007.

The settlement is subject to FERC approval. Northwest anticipates the approval process will be completed by mid-2007.

About Williams (NYSE:WMB)

Williams, through its subsidiaries, primarily finds, produces, gathers, processes and transports natural gas. The company also manages a wholesale power business. Williams’ operations are concentrated in the Pacific Northwest, Rocky Mountains, Gulf Coast, Southern California and Eastern Seaboard. More information is available at www.williams.com.

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Portions of this document may constitute “forward-looking statements” as defined by federal law. Although the company believes any such statements are based on reasonable assumptions, there is no assurance that actual outcomes will not be materially different. Any such statements are made in reliance on the “safe harbor” protections provided under the Private Securities Reform Act of 1995. Additional information about issues that could lead to material changes in performance is contained in the company’s annual reports filed with the Securities and Exchange Commission.

Contact Information:

Richard George	Williams Investor Relations	918-573-3679
Michele Swaner	Media Relations	(801) 584-7048

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