0001144204-07-058860 10-Q 5 20070930 20071107 20071107 COLUMBIA BANKING SYSTEM INC 0000887343 6022 911422237 WA 1231 10-Q 34 000-20288 071221951 1102 BROADWAY PLAZA TACOMA WA 98402 2533051900 1102 BROADWAY PLAZA TACOMA WA 98402 10-Q 1 v092667_10q.htm EX-3.1 2 v092667_ex3-1.htm EX-31.1 3 v092667_ex31-1.htm EX-31.2 4 v092667_ex31-2.htm EX-32 5 v092667_ex32.htm