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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): September 12, 2007
 Northwest Pipeline Corporation
 
  Delaware
    
    1-7414
    
    87-0269236(State or other jurisdiction 
of incorporation)
    
    (Commission
File No.)
    
    (IRS Employer
Identification No.)295 Chipeta Way, Salt Lake City, Utah
    
    
    
    84108(Address of principal executive offices)
    
    
    
    (Zip Code)
 (801) 583-8800
 
  Not Applicable
 
   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 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))




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Item 7.01
Regulation FD Disclosure.
   Item 9.01 Financial Statements and Exhibits.
 (d)
    
    Exhibits
 Exhibit No.
    
    Description99.1
    
    

Press
Release, dated September 12, 200799.2
    
    
    The section of the Registration Statement entitled Selected
Historical and Pro Forma Financial and Operating Data.99.3
    
    
    A
portion of the section of the Registration Statement entitled
Managements Discussion and Analysis of Financial Condition
and Results of Operations.99.4
    
    
    A portion of the section of the Registration Statement
entitled Cash Distribution Policy and Restrictions on
Distributions.
 Forward Looking Statements Warning
 All statements, other than statements of historical facts, included in this report, which
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, could, may,
should, continues, estimates, expects, forecasts, might, planned, potential,
projects, scheduled or similar expressions. These forward-looking statements include, among
others, statements regarding:
 
    
    Amounts and nature of future capital expenditures;
    
    Expansion and growth of our business and operations;
    
    Business strategy;
    
    Cash flow from operations; and




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
    
    Power 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 document. Many of the factors that will determine these results are beyond our ability to
control or predict. Specific factors which could cause actual results to differ from those in
the forward-looking statements include:
 
    
    Availability of supplies (including the uncertainties inherent in assessing and
estimating future natural gas reserves), market demand, volatility of prices, and
increased costs of capital;
    
    Inflation, interest rates, and general economic conditions;
    
    The strength and financial resources of our 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;
    
    Changes in the current geopolitical situation;
    
    Risks related to strategy and financing, including restrictions stemming from our
debt agreements and our lack of investment grade credit ratings; and
    
    Risk associated with future weather conditions and acts of terrorism.
 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 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. For a detailed
discussion of those factors, see Part I, Item 1A. Risk Factors in our Annual Report on Form 10-K
for the year ended December 31, 2006 and Part II, Item 1A. Risk Factors in our Quarterly Report
on Form 10-Q for the quarter ended June 30, 2007.
 By including any information in this Current Report on Form 8-K , we do not necessarily
acknowledge that disclosure of such information is required by applicable law or that the
information is material.




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SIGNATURE
   NORTHWEST PIPELINE CORPORATIONBy:
    /s/ BRIAN K. SHOREBrian K. ShoreCorporate Secretary