X0303 4 2009-05-04 0 0000073020 NORTHWEST NATURAL GAS CO NWN 0001192773 DODSON MARK S 220 NW SECOND AVENUE PORTLAND OR 97209 1 0 0 0 Common Stock 2009-05-04 4 S 0 12500 42.0675 D 21757 I By trust 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 were previously reported as directly beneficially owned but were contributed to a trust for the benefit of the reporting person's spouse. 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 retirment 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 retirment 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 retirment on December 31, 2008. The option expires on December 31, 2011. MardiLyn Saathoff, Attorney-in-Fact 2009-05-06