UNITED STATES
SECURITIES AND EXCHANGE COMMISSION

WASHINGTON, D. C. 20549

FORM 10-K/A

þ Annual Report Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934

For the fiscal year ended December 31, 2007

Or

o Transition Report Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934

For the Transition Period from                      to                     

Commission File Number 1-7414

NORTHWEST PIPELINE GP

(Exact name of registrant as specified in its charter)

DELAWARE	26-1157701
(State or other jurisdiction of	(I.R.S. Employer
incorporation or organization)	Identification No.)

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

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

Securities Registered Pursuant to Section 12(b) of the Act:
None

Securities Registered Pursuant to Section 12(g) of the Act:
None

Indicate by check mark if the registrant is a well-known seasoned issuer, as defined in Rule 405 of the Securities Act. Yes 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 if disclosure of delinquent filers pursuant to Item 405 of Regulation S-K 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 o	Non-accelerated filer þ	Smaller reporting company o
		(Do not check if a smaller reporting company)

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

Documents Incorporated by Reference:
None

EXPLANATORY NOTE

          The Registrant is filing this Amendment No. 1 (the “Amendment”) to the Registrant’s Annual Report on Form 10-K for the fiscal year ended December 31, 2007 (the “Form 10-K”), which was originally filed with the Securities and Exchange Commission on February 29, 2008. The Amendment is being filed solely to correct the Section 302 certifications filed as Exhibits 31(a) and
31(b) to the Form 10-K, which inadvertently omitted certain language that was required to be included.

          Except for the matter described above, the Amendment does not change any previously reported financial results, modify or update disclosures in the Form 10-K, or reflect events occurring after the date of the filing of the Form 10-K.

Part IV

Item 15. Exhibits and Financial Statement Schedules

          Exhibits. The exhibits that are filed with this Amendment are set forth in the Exhibit Index.

SIGNATURES

     Pursuant to the requirements of Section 13 or 15(d) of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized.

NORTHWEST PIPELINE CORPORATION      (Registrant)
By	/s/ R. Rand Clark
	R. Rand Clark
	Controller

Date: August 25, 2008

EXHIBIT INDEX

Exhibit	Description
31(a)	Section 302 Certification of Principal Executive Officer
31(b)	Section 302 Certification of Principal Financial Officer
32	Section 906 Certification of Principal Executive Officer and Principal Financial Officer