Exhibit 99



CERTIFICATION OF PRINCIPAL EXECUTIVE
OFFICER

PURSUANT TO SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002



In connection with the accompanying Quarterly Report on Form
10-Q of PG&E Gas Transmission, Northwest Corporation for the quarter ended March 31, 2003, I, Thomas B. King, President of PG&E Gas Transmission, Northwest Corporation, hereby certify pursuant to 18 U.S.C. § 1350, as adopted pursuant to
§ 906 of the Sarbanes-Oxley Act of 2002, to the best of my knowledge and belief, that:



| | (1) |  | such Quarterly Report on Form 10-Q for the quarter ended March 31, 2003, fully complies with the requirements of section 13(a) or 15(d) of the Securities Exchange
Act of 1934; and
| | --- |  | -----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| | (2) |  | the information contained in such Quarterly Report on Form 10-Q for the quarter ended March 31, 2003, fairly presents, in all material respects, the financial
condition and results of operations of PG&E Gas Transmission, Northwest Corporation.
| | --- |  | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



A signed original of this written statement required by Section 906 has been provided to PG&E Gas Transmission, Northwest Corporation
and will be retained by PG&E Gas Transmission, Northwest Corporation and furnished to the Securities and Exchange Commission or its staff upon request.



|                 
|-----------------
|Date: May 8, 2003
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CERTIFICATION OF

PRINCIPAL FINANCIAL OFFICER

PURSUANT TO SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002



In connection with the accompanying Quarterly Report on Form 10-Q of PG&E Gas Transmission, Northwest
Corporation for the quarter ended March 31, 2003, I, Thomas E. Legro, Vice President and Controller of PG&E Gas Transmission, Northwest Corporation, hereby certify pursuant to 18 U.S.C. § 1350, as adopted pursuant to § 906 of the
Sarbanes-Oxley Act of 2002, to the best of my knowledge and belief, that:



| | (1) |  | such Quarterly Report on Form 10-Q for the quarter ended March 31, 2003, fully complies with the requirements of section 13(a) or 15(d) of the Securities Exchange
Act of 1934; and
| | --- |  | -----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| | (2) |  | the information contained in such Quarterly Report on Form 10-Q for the quarter ended March 31, 2003, fairly presents, in all material respects, the financial
condition and results of operations of PG&E Gas Transmission, Northwest Corporation.
| | --- |  | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



A signed original of this written statement required by Section 906 has been provided to PG&E Gas Transmission, Northwest Corporation
and will be retained by PG&E Gas Transmission, Northwest Corporation and furnished to the Securities and Exchange Commission or its staff upon request.



|                 
|-----------------
|Date: May 8, 2003
|