POWER OF ATTORNEY
KNOW ALL BY THESE PRESENTS, that the undersigned hereby constitutes and appoints 
the Secretary or the Assistant Secretary, the undersigned's true and lawful 
attorney-in-fact to:
(1)        execute for and on behalf of the undersigned, in the undersigned's 
capacity as an officer of and/or director of and/or beneficial owner of greater 
than ten percent of a class of equity securities registered under Section 12 of 
the Securities Exchange Act of 1934, as amended (the "Exchange Act"), of 
Northwest Natural Gas Company, an Oregon corporation (the "Company"), Forms 3, 
4, and 5 in accordance with Section 16(a) of the Exchange Act and the rules 
thereunder;
(2)        do and perform any and all acts for and on behalf of the undersigned which 
may be necessary or desirable to complete and execute any such Forms 3, 4, or 5 
and timely file any such form with the United States Securities and Exchange 
Commission, any stock exchange or similar authority, and the Company; and
(3)        take any other action of any type whatsoever in connection with the  
foregoing which, in the opinion of such attorney-in-fact, may be of benefit to, 
in the best interest of, or legally required by, the undersigned, it being  
understood that the documents executed by such attorney-in-fact on behalf of the 
undersigned pursuant to this Power of Attorney shall be in such form and shall 
contain such terms and conditions as such attorney-in-fact may approve in such 
attorney-in-facts's discretion.
The undersigned hereby grants such attorney-in-fact full power and authority to 
do and perform any and every act and thing whatsoever requisite, necessary, or 
proper to be done in the exercise of any of the rights and powers herein 
granted, as fully to all intents and purposes as the undersigned might or could 
do if personally present, with full power of substitution or revocation, hereby 
ratifying and confirming all that such attorney-in-fact, or such attorney-in- 
fact's substitute or substitutes, shall lawfully do or cause to be done by 
virtue of this Power of Attorney and the rights and powers herein granted.  The 
undersigned acknowledges that the foregoing attorney-in-fact, in serving in such 
capacity at the request of the undersigned, is not assuming, nor is the Company 
assuming, any of the undersigned's responsibilities to comply with Section 16 of 
the Exchange Act.
This Power of Attorney shall remain in full force and effect until the 
undersigned is no longer required to file Forms 3, 4, and 5 with respect to the 
undersigned's holdings of and transactions in securities issued by the Company, 
unless earlier revoked by the undersigned in a signed writing delivered to the 
foregoing attorney-in-fact.
IN WITNESS WHEREOF, the undersigned has caused this Power of Attorney to be 
executed as of the 29th day of September 2004.
/s/ David H. Anderson                        
David H. Anderson