0001193125-07-045469 10-K 10 20061231 20070302 20070302 COLUMBIA BANKING SYSTEM INC 0000887343 6022 911422237 WA 1231 10-K 34 000-20288 07668310 1102 BROADWAY PLAZA TACOMA WA 98402 2533051900 1102 BROADWAY PLAZA TACOMA WA 98402 10-K 1 d10k.htm ANNUAL REPORT ON FORM 10-K EX-21 2 dex21.htm SUBSIDIARIES OF THE REGISTRANT EX-23 3 dex23.htm CONSENT OF DELOITTE & TOUCHE LLP EX-24 4 dex24.htm POWER OF ATTORNEY EX-31.1 5 dex311.htm SECTION 302 CERTIFICATION OF CHIEF EXECUTIVE OFFICER EX-31.2 6 dex312.htm SECTION 302 CERTIFICATION OF CHIEF FINANCIAL OFFICER EX-32 7 dex32.htm SECTION 906 CEO AND CFO CERTIFICATIONS GRAPHIC 8 g10278g79u53.jpg GRAPHIC GRAPHIC 9 g10278g86o74.jpg GRAPHIC GRAPHIC 10 g10278sig_001.jpg GRAPHIC