X0304 4 2012-01-13 0 0000073020 NORTHWEST NATURAL GAS CO NWN 0001192773 DODSON MARK S 220 NW SECOND AVENUE PORTLAND OR 97209 1 0 0 0 Common Stock 2012-01-13 5 G 0 2374 0 D 19881.764 I See Footnote Common Stock 2012-01-13 5 G 0 2374 0 A 8007 I By Trust Common Stock 2012-01-13 4 S 0 805 46.8095 D 19076.764 I See Footnote Common Stock 6.838 D Reflects shares that have been credited to reporting person's account under the issuer's Deferred Compensation Plan for Directors and Executives. 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. These shares were issued in connection with the Reporting Person's election on 12/10/2007 to participate in Northwest Natural Gas Company Deferred Compensation Plan for Directors and Executives (DCP), which specifies that taxes shall be withheld from distributions. Pursuant to the Plan and the Reporting Person's election on 12/10/2007, these shares were sold to pay taxes on the DCP distribution made on 1/13/2012. Shawn M. Filippi, Attorney-in-Fact 2012-01-17