X0303 5 2009-12-31 0 0 0 0000073020 NORTHWEST NATURAL GAS CO NWN 0001192773 DODSON MARK S 220 NW SECOND AVENUE PORTLAND OR 97209 1 0 0 0 Common Stock 2009-11-06 5 G 0 351 0 D 11894 I By Trust Common Stock 2009-11-23 5 G 0 590 0 D 11304 I By Trust Common Stock 2009-11-23 5 G 0 355 0 D 10949 I By Trust Common Stock 2009-11-23 5 G 0 240 0 D 10709 I By Trust Common Stock 20740.925 I See Footnote Common Stock 13000 D Employee Stock Option to Buy 34.29 2011-12-31 Common Stock 23000 23000 D Employee Stock Option to Buy 44.48 2011-12-31 Common Stock 23000 23000 D Employee Stock Option to Buy 43.29 2011-12-31 Common Stock 25000 25000 D These shares are held in a trust for the benefit of the reporting person's spouse. The filing of this report is not an admission that the reporting person is the beneficial owner of these securities for purposes of Section 16 or for any other purpose. Shares have been credited to reporting person's account under the issuer's Deferred Compensation Plan for Directors and Executives. Option was granted for 23,000 shares pursuant to Northwest Natural Gas Company's Restated Stock Option Plan (the "Plan"). Pursuant to the Plan, the option fully vested upon Mr. Dodson's retirement on December 31, 2008. The option expires on December 31, 2011. Option was granted for 23,000 shares pursuant to Northwest Natural Gas Company's Restated Stock Option Plan (the "Plan"). Pursuant to the Plan, the option fully vested upon Mr. Dodson's retirement on December 31, 2008. The option expires on December 31, 2011. Option was granted for 25,000 shares pursuant to Northwest Natural Gas Company's Restated Stock Option Plan (the "Plan"). Pursuant to the Plan, the option fully vested upon Mr. Dodson's retirement on December 31, 2008. The option expires on December 31, 2011. MardiLyn Saathoff, Attorney-in-Fact 2010-02-16