EXHIBIT 24.1

POWER OF ATTORNEY

(Northwest Natural Gas Company Deferred Compensation Plan for Directors and Executives)

The undersigned, an officer and/or director of Northwest Natural Gas Company (the “Company”), does hereby constitute and appoint C.J. Rue his true and lawful attorney and agent to do any and all acts and things and to execute in his name (whether on behalf of the Company or as an officer or director of the Company, or otherwise) any and all instruments which said attorney and agent may deem necessary or advisable in order to enable the Company to comply with the Securities Act of 1933, as amended, and any requirements of the Securities and Exchange Commission in respect thereof, in connection with the registration under the Securities Act of 1933, as amended, of securities of the Company offered pursuant to the Company’s Deferred Compensation Plan for Directors and Executives, including specifically, but without limitation, power and authority to sign his name (whether on behalf of the Company or as an officer or director of the Company, or otherwise) to a Registration Statement on Form S-8 and any amendment thereto (including any post-effective amendment) or application for amendment thereto in respect to such securities or any exhibits filed therewith; and to file the same with the Securities and Exchange Commission; and the undersigned does hereby ratify and confirm all that said attorney and agent shall do or cause to be done by virtue hereof.

DATED: November 30, 2004

/s/ David Anderson

Signature

David H. Anderson

Type or Print Name

POWER OF ATTORNEY

(Northwest Natural Gas Company Deferred Compensation Plan for Directors and Executives)

The undersigned, an officer and/or director of Northwest Natural Gas Company (the “Company”), does hereby constitute and appoint David H. Anderson and C.J. Rue, and each of them, his or her true and lawful attorney and agent to do any and all acts and things and to execute in his or her name (whether on behalf of the Company or as an officer or director of the Company, or otherwise) any and all instruments which said attorney and agent may deem necessary or advisable in order to enable the Company to comply with the Securities Act of 1933, as amended, and any requirements of the Securities and Exchange Commission in respect thereof, in connection with the registration under the Securities Act of 1933, as amended, of securities of the Company offered pursuant to the Company’s Deferred Compensation Plan for Directors and Executives, including specifically, but without limitation, power and authority to sign his or her name (whether on behalf of the Company or as an officer or director of the Company, or otherwise) to a Registration Statement on Form S-8 and any amendment thereto (including any post-effective amendment) or application for amendment thereto in respect to such securities or any exhibits filed therewith; and to file the same with the Securities and Exchange Commission; and the undersigned does hereby ratify and confirm all that said attorney and agent shall do or cause to be done by virtue hereof.

DATED: November 30, 2004

/s/ Stephen P. Feltz

Signature

Stephen P. Feltz

Type or Print Name

POWER OF ATTORNEY

(Northwest Natural Gas Company Deferred Compensation Plan for Directors and Executives)

The undersigned, an officer and/or director of Northwest Natural Gas Company (the “Company”), does hereby constitute and appoint David H. Anderson and C.J. Rue, and each of them, his or her true and lawful attorney and agent to do any and all acts and things and to execute in his or her name (whether on behalf of the Company or as an officer or director of the Company, or otherwise) any and all instruments which said attorney and agent may deem necessary or advisable in order to enable the Company to comply with the Securities Act of 1933, as amended, and any requirements of the Securities and Exchange Commission in respect thereof, in connection with the registration under the Securities Act of 1933, as amended, of securities of the Company offered pursuant to the Company’s Deferred Compensation Plan for Directors and Executives, including specifically, but without limitation, power and authority to sign his or her name (whether on behalf of the Company or as an officer or director of the Company, or otherwise) to a Registration Statement on Form S-8 and any amendment thereto (including any post-effective amendment) or application for amendment thereto in respect to such securities or any exhibits filed therewith; and to file the same with the Securities and Exchange Commission; and the undersigned does hereby ratify and confirm all that said attorney and agent shall do or cause to be done by virtue hereof.

DATED: November 17, 2004

/s/ Timothy P. Boyle

Signature

Timothy P. Boyle

Type or Print Name

POWER OF ATTORNEY

(Northwest Natural Gas Company Deferred Compensation Plan for Directors and Executives)

The undersigned, an officer and/or director of Northwest Natural Gas Company (the “Company”), does hereby constitute and appoint David H. Anderson and C.J. Rue, and each of them, his or her true and lawful attorney and agent to do any and all acts and things and to execute in his or her name (whether on behalf of the Company or as an officer or director of the Company, or otherwise) any and all instruments which said attorney and agent may deem necessary or advisable in order to enable the Company to comply with the Securities Act of 1933, as amended, and any requirements of the Securities and Exchange Commission in respect thereof, in connection with the registration under the Securities Act of 1933, as amended, of securities of the Company offered pursuant to the Company’s Deferred Compensation Plan for Directors and Executives, including specifically, but without limitation, power and authority to sign his or her name (whether on behalf of the Company or as an officer or director of the Company, or otherwise) to a Registration Statement on Form S-8 and any amendment thereto (including any post-effective amendment) or application for amendment thereto in respect to such securities or any exhibits filed therewith; and to file the same with the Securities and Exchange Commission; and the undersigned does hereby ratify and confirm all that said attorney and agent shall do or cause to be done by virtue hereof.

DATED: November 11, 2004

/s/ Martha Byorum

Signature

Martha Byorum

Type or Print Name

POWER OF ATTORNEY

(Northwest Natural Gas Company Deferred Compensation Plan for Directors and Executives)

The undersigned, an officer and/or director of Northwest Natural Gas Company (the “Company”), does hereby constitute and appoint David H. Anderson and C.J. Rue, and each of them, his or her true and lawful attorney and agent to do any and all acts and things and to execute in his or her name (whether on behalf of the Company or as an officer or director of the Company, or otherwise) any and all instruments which said attorney and agent may deem necessary or advisable in order to enable the Company to comply with the Securities Act of 1933, as amended, and any requirements of the Securities and Exchange Commission in respect thereof, in connection with the registration under the Securities Act of 1933, as amended, of securities of the Company offered pursuant to the Company’s Deferred Compensation Plan for Directors and Executives, including specifically, but without limitation, power and authority to sign his or her name (whether on behalf of the Company or as an officer or director of the Company, or otherwise) to a Registration Statement on Form S-8 and any amendment thereto (including any post-effective amendment) or application for amendment thereto in respect to such securities or any exhibits filed therewith; and to file the same with the Securities and Exchange Commission; and the undersigned does hereby ratify and confirm all that said attorney and agent shall do or cause to be done by virtue hereof.

DATED: November 17, 2004

/s/ John D. Carter

Signature

John D. Carter

Type or Print Name

POWER OF ATTORNEY

(Northwest Natural Gas Company Deferred Compensation Plan for Directors and Executives)

The undersigned, an officer and/or director of Northwest Natural Gas Company (the “Company”), does hereby constitute and appoint David H. Anderson and C.J. Rue, and each of them, his or her true and lawful attorney and agent to do any and all acts and things and to execute in his or her name (whether on behalf of the Company or as an officer or director of the Company, or otherwise) any and all instruments which said attorney and agent may deem necessary or advisable in order to enable the Company to comply with the Securities Act of 1933, as amended, and any requirements of the Securities and Exchange Commission in respect thereof, in connection with the registration under the Securities Act of 1933, as amended, of securities of the Company offered pursuant to the Company’s Deferred Compensation Plan for Directors and Executives, including specifically, but without limitation, power and authority to sign his or her name (whether on behalf of the Company or as an officer or director of the Company, or otherwise) to a Registration Statement on Form S-8 and any amendment thereto (including any post-effective amendment) or application for amendment thereto in respect to such securities or any exhibits filed therewith; and to file the same with the Securities and Exchange Commission; and the undersigned does hereby ratify and confirm all that said attorney and agent shall do or cause to be done by virtue hereof.

DATED: November 17, 2004

/s/ C. Scott Gibson

Signature

C. Scott Gibson

Type or Print Name

POWER OF ATTORNEY

(Northwest Natural Gas Company Deferred Compensation Plan for Directors and Executives)

The undersigned, an officer and/or director of Northwest Natural Gas Company (the “Company”), does hereby constitute and appoint David H. Anderson and C.J. Rue, and each of them, his or her true and lawful attorney and agent to do any and all acts and things and to execute in his or her name (whether on behalf of the Company or as an officer or director of the Company, or otherwise) any and all instruments which said attorney and agent may deem necessary or advisable in order to enable the Company to comply with the Securities Act of 1933, as amended, and any requirements of the Securities and Exchange Commission in respect thereof, in connection with the registration under the Securities Act of 1933, as amended, of securities of the Company offered pursuant to the Company’s Deferred Compensation Plan for Directors and Executives, including specifically, but without limitation, power and authority to sign his or her name (whether on behalf of the Company or as an officer or director of the Company, or otherwise) to a Registration Statement on Form S-8 and any amendment thereto (including any post-effective amendment) or application for amendment thereto in respect to such securities or any exhibits filed therewith; and to file the same with the Securities and Exchange Commission; and the undersigned does hereby ratify and confirm all that said attorney and agent shall do or cause to be done by virtue hereof.

DATED: November 18, 2004

/s/ Randall C. Papé

Signature

Randall C. Papé

Type or Print Name

POWER OF ATTORNEY

(Northwest Natural Gas Company Deferred Compensation Plan for Directors and Executives)

The undersigned, an officer and/or director of Northwest Natural Gas Company (the “Company”), does hereby constitute and appoint David H. Anderson and C.J. Rue, and each of them, his or her true and lawful attorney and agent to do any and all acts and things and to execute in his or her name (whether on behalf of the Company or as an officer or director of the Company, or otherwise) any and all instruments which said attorney and agent may deem necessary or advisable in order to enable the Company to comply with the Securities Act of 1933, as amended, and any requirements of the Securities and Exchange Commission in respect thereof, in connection with the registration under the Securities Act of 1933, as amended, of securities of the Company offered pursuant to the Company’s Deferred Compensation Plan for Directors and Executives, including specifically, but without limitation, power and authority to sign his or her name (whether on behalf of the Company or as an officer or director of the Company, or otherwise) to a Registration Statement on Form S-8 and any amendment thereto (including any post-effective amendment) or application for amendment thereto in respect to such securities or any exhibits filed therewith; and to file the same with the Securities and Exchange Commission; and the undersigned does hereby ratify and confirm all that said attorney and agent shall do or cause to be done by virtue hereof.

DATED: November 12, 2004

/s/ Richard G. Reiten

Signature

Richard G. Reiten

Type or Print Name

POWER OF ATTORNEY

(Northwest Natural Gas Company Deferred Compensation Plan for Directors and Executives)

The undersigned, an officer and/or director of Northwest Natural Gas Company (the “Company”), does hereby constitute and appoint David H. Anderson and C.J. Rue, and each of them, his or her true and lawful attorney and agent to do any and all acts and things and to execute in his or her name (whether on behalf of the Company or as an officer or director of the Company, or otherwise) any and all instruments which said attorney and agent may deem necessary or advisable in order to enable the Company to comply with the Securities Act of 1933, as amended, and any requirements of the Securities and Exchange Commission in respect thereof, in connection with the registration under the Securities Act of 1933, as amended, of securities of the Company offered pursuant to the Company’s Deferred Compensation Plan for Directors and Executives, including specifically, but without limitation, power and authority to sign his or her name (whether on behalf of the Company or as an officer or director of the Company, or otherwise) to a Registration Statement on Form S-8 and any amendment thereto (including any post-effective amendment) or application for amendment thereto in respect to such securities or any exhibits filed therewith; and to file the same with the Securities and Exchange Commission; and the undersigned does hereby ratify and confirm all that said attorney and agent shall do or cause to be done by virtue hereof.

DATED: November 12, 2004

/s/ Melody C. Teppola

Signature

Melody C. Teppola

Type or Print Name

POWER OF ATTORNEY

(Northwest Natural Gas Company Deferred Compensation Plan for Directors and Executives)

The undersigned, an officer and/or director of Northwest Natural Gas Company (the “Company”), does hereby constitute and appoint David H. Anderson and C.J. Rue, and each of them, his or her true and lawful attorney and agent to do any and all acts and things and to execute in his or her name (whether on behalf of the Company or as an officer or director of the Company, or otherwise) any and all instruments which said attorney and agent may deem necessary or advisable in order to enable the Company to comply with the Securities Act of 1933, as amended, and any requirements of the Securities and Exchange Commission in respect thereof, in connection with the registration under the Securities Act of 1933, as amended, of securities of the Company offered pursuant to the Company’s Deferred Compensation Plan for Directors and Executives, including specifically, but without limitation, power and authority to sign his or her name (whether on behalf of the Company or as an officer or director of the Company, or otherwise) to a Registration Statement on Form S-8 and any amendment thereto (including any post-effective amendment) or application for amendment thereto in respect to such securities or any exhibits filed therewith; and to file the same with the Securities and Exchange Commission; and the undersigned does hereby ratify and confirm all that said attorney and agent shall do or cause to be done by virtue hereof.

DATED: November 15, 2004

/s/ Russell Tromley

Signature

Russell F. Tromley

Type or Print Name

POWER OF ATTORNEY

(Northwest Natural Gas Company Deferred Compensation Plan for Directors and Executives)

The undersigned, an officer and/or director of Northwest Natural Gas Company (the “Company”), does hereby constitute and appoint David H. Anderson and C.J. Rue, and each of them, his or her true and lawful attorney and agent to do any and all acts and things and to execute in his or her name (whether on behalf of the Company or as an officer or director of the Company, or otherwise) any and all instruments which said attorney and agent may deem necessary or advisable in order to enable the Company to comply with the Securities Act of 1933, as amended, and any requirements of the Securities and Exchange Commission in respect thereof, in connection with the registration under the Securities Act of 1933, as amended, of securities of the Company offered pursuant to the Company’s Deferred Compensation Plan for Directors and Executives, including specifically, but without limitation, power and authority to sign his or her name (whether on behalf of the Company or as an officer or director of the Company, or otherwise) to a Registration Statement on Form S-8 and any amendment thereto (including any post-effective amendment) or application for amendment thereto in respect to such securities or any exhibits filed therewith; and to file the same with the Securities and Exchange Commission; and the undersigned does hereby ratify and confirm all that said attorney and agent shall do or cause to be done by virtue hereof.

DATED: November 15, 2004

/s/ Richard L. Woolworth

Signature

Richard L. Woolworth

Type or Print Name