THE CORPORATE LIBRARY

Related Party Transactions and Outside Related Director Information

Northwest Natural Gas Company (NWN)

4/17/2006 Proxy Information

Richard G. Reiten was Chairman of Northwest Natural Gas Company (Portland, OR) (Northwest) from September 2000 until February 2005. He joined Northwest in 1996 as President, a position he held until 2001, and Chief Operating Officer, a position he held until 1997. Mr. Reiten served as Chief Executive Officer of Northwest from January 1997 until December 2002.

From time to time, the Company conducts business with affiliates of The Papˇ Group, Inc., of which director Randall C. Papˇ is President, Chief Executive Officer and a major shareholder.

The Company entered into a lease through May 31, 2007 with an affiliate of The Papˇ Group and paid $78,167 in connection with the lease in 2005. From time to time, the Company also purchases equipment from and employs the services of certain affiliates of The Papˇ Group. In 2005, the Company paid $271,159 for such equipment and services. Based upon representations from The Papˇ GroupÕs independent auditor and a review of the transactions, the Board of Directors has affirmatively determined that these transactions were armÕs length transactions entered into in the ordinary course of business and not material.

4/15/2005 Proxy Information

From time to time, the Company conducts business with affiliates of The Pape Group, Inc., of which director Randall C. Pape is President, Chief Executive Officer and a major shareholder.

The Company entered into a lease through May 31, 2007 with an affiliate of The Papˇ Group and paid $73,300 in connection with the lease in 2004. From time to time, the Company also purchases equipment from and employs the services of certain affiliates of The Papˇ Group. In 2004, the Company paid $128,010 for such equipment and services. Based upon representations from The Papˇ GroupÕs independent auditor and a review of the transactions, the Board of Directors has affirmatively determined that these transactions were armÕs length transactions entered into in the ordinary course of business and not material.

Mr. Reiten joined Northwest Natural Gas Company in 1996 as President, a position he held until 2001, and Chief Operating Officer, a position he held until 1997. Mr. Reiten served as Chief Executive Officer of Northwest from January 1997 until December 2002.

4/16/2004 Proxy Information

Richard G. Reiten served as Chief Executive Officer of Northwest Natural Gas Company from 1997 to 2002.

Robert L. Ridgley served as President and Chief Executive Officer of Northwest Natural Gas Company from January 1985 until March 1996, when he became Chairman and Chief Executive Officer.

In January 2003, the Company contributed $125,000 to establish the Richard G. Reiten Leadership Fund with the Oregon Community Foundation in honor of retiring Chief Executive Officer, Richard G. Reiten. The fund is for general charitable purposes and Mr. Reiten and his family members will advise the Oregon Community Foundation on the fundÕs use. Mr. Gibson, a director, is a member of the Board of Trustees of the Oregon Community Foundation and serves on the CompanyÕs Public Affairs and Environmental Policy, Strategic Planning and Organization and Executive Compensation Committees. In addition, Ms. Teppola is a member of the Board of Trustees of the Oregon Community Foundation and serves on the CompanyÕs Public Affairs and Environmental Policy, Audit and Governance Committees. The Board approved this transaction in December 2002.

4/18/2003 Proxy Information

In January 2003, the Company contributed $125,000 to establish the Richard G. Reiten Leadership Fund with the Oregon Community Foundation in honor of retiring Chief Executive Officer, Richard G. Reiten. The fund is for general charitable purposes and Mr. Reiten and his family members will advise the Oregon Community Foundation on the fund's use. Mr. Gibson, a director, is a member of the Board of Trustees of the Oregon Community Foundation and serves on the Company's Environmental Policy, Public Affairs and Organization and Executive Compensation Committees. The Board approved this transaction in December 2002.