X0303 4/A 2009-07-01 2009-07-06 0 0000073020 NORTHWEST NATURAL GAS CO NWN 0001192773 DODSON MARK S 220 NW SECOND AVENUE PORTLAND OR 97209 1 0 0 0 Common Stock 2009-06-29 5 G 0 1000 0 D 16579 I By Trust Common Stock 2009-08-07 5 G 0 1703 0 A 18282 I By Trust Common Stock 2009-08-07 5 G 0 1703 0 D 20913.256 I See Footnote Common Stock 2009-08-07 4 S 0 555 42.7628 D 20358.256 I See Footnote Common Stock 2009-08-11 4 S 0 3 42.32 D 20355.256 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. 1,703 shares were previously reported as indirectly beneficially owned under the Northwest Natural Gas Company's Deferred Compensation Plan for Directors and Officers but were contributed to the trust referred to in footnote 1 on August 11, 2009. On June 11, 2009 the reporting person elected to sell a portion of a distribution under Northwest Natural Gas Company's Deferred Compensation Plan for Directors and Officers (the "Deferred Compensation Plan") on July 1, 2009 to pay for tax withholding on a distribution. The transaction was supposed to be executed on July 1, 2009 and was reported on the Form 4 that this Form 4A amends. However, due to administrative error, the Trustee of the Company's Deferred Compensation Plan (the "Trustee") failed to execute the transactions on July 1, 2009. Instead the Trustee effected the transactions on August 7, 2009 and August 11, 2009 as reported in this Form 4A. Shares have been credited against 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"). The option vested in installments of 5,750 shares on each February 22, 2007 and January 1, 2008. Pursuant to the Plan, the remaining 11,500 shares became fully exercisable 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"). The option vested in installment of 5,750 shares on February 21, 2008. Pursuant to the Plan, the remaining 17,250 shares became fully exercisable 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 remaining 25,000 shares became fully exercisable upon Mr. Dodson's retirement on December 31, 2008. The option expires on December 31, 2011. MardiLyn Saathoff, Attorney-in-Fact 2009-08-11