X0201 4 2003-09-04 0 0000073020 NORTHWEST NATURAL GAS CO NWN 0001192772 DEBOLT BRUCE R 220 N.W. 2ND AVENUE PORTLAND OR 97209 0 1 0 0 Senior Vice President and CFO Common Stock, $3-1/6 par value 2003-09-04 4 M 0 491 24.00 A 20176 D Common Stock, $3-1/6 par value 2003-09-04 4 M 0 2679 20.92 A 22855 D Common Stock, $3-1/6 par value 2003-09-04 4 F 0 2290 29.62 D 20565 D Common Stock, $3-1/6 par value 308.801 I See footnote Common Stock, $3-1/6 par value 100 I See footnote Option to Buy 24.00 2003-09-04 4 M 0 491 D 2004-02-24 Common Stock 491 0 D Option to Buy 20.92 2003-09-04 4 M 0 2679 D 1997-02-21 2006-02-28 Common Stock 2679 4821 D Held in reporting person's account under issuer's Retirement K Savings Plan as of 8/31/03. Held by Alexander DeBolt, reporting person's son. Option was granted for 6,000 shares on 2/24/94 pursuant to the Northwest Natural Gas Company 1985 Stock Option Plan (now the Restated Stock Option Plan). Option for 3,750 shares became exercisable on 2/24/95 and option for 2,250 shares became exercisable on 1/1/96. Employee Option. /s/ C.J. Rue, Attorney-in-Fact 2003-09-05