0001032210-98-000222 DEF 14A 1 19980422 19980316 NASD COLUMBIA BANKING SYSTEM INC 0000887343 6035 911422237 WA 1231 DEF 14A 34 000-20288 98566518 1102 BROADWAY PLAZA TACOMA WA 98402 2533051900 1102 BROADWAY PLAZA TACOMA WA 98402 DEF 14A 1 000103221098000222-001-seq1-def-14a.txt DEFINITIVE PROXY STATEMENT