X0303 4 2011-01-10 0 0000073020 NORTHWEST NATURAL GAS CO NWN 0001192773 DODSON MARK S 220 NW SECOND AVENUE PORTLAND OR 97209 1 0 0 0 Common Stock 2011-01-10 5 G 0 2161 0 D 20967.116 I See Footnote Common Stock 2011-01-10 5 G 0 2161 0 A 7438 I By Trust Common Stock 2011-01-10 4 S 0 730 46.0555 D 20237.116 I See Footnote Common Stock 10000 D These 2,161 shares were previously reported as indirectly beneficially owned under the Northwest Natural Gas Company's Deferred Compensation Plan for Directors and Executives but pursuant to an election of the executive were contributed to the trust referred to in footnote 4 on January 10, 2011. Reflects shares that have been credited to reporting person's account under the issuer's Deferred Compensation Plan for Directors and Executives. Mr. Dodson gifted 996 from shares the trust referred to in Footnote 4, on November 10, 2010. These gifts of shares will be reported on a Form 5 for the year ending 2010. 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. On December 29, 2010 the reporting person elected to sell a portion of a previously scheduled distribution under Northwest Natural Gas Company's Deferred Compensation Plan for Directors and Executives on January 10, 2011 to pay taxes with respect to distribution on that date. Shawn M. Filippi, Attorney-in-Fact 2011-01-12