X0201 4/A2003-12-312004-01-07 0000887343 COLUMBIA BANKING SYSTEM INC COLB 0001186640 DRESSEL MELANIE J WA 1100President and CEOCommon Stock2003-12-315I014316.209A48314DCommon Stock2003-12-315I04420.472A4927I401(k)Common Stock10IBy self for son.Common Stock10IBy self for son.Common Stock2294INorth Mason FiberRepresents gift of shares to son Brent Dressel.Represents gift of shares to son Robert Dressel.Represents Employee Stock Purchase Plan acquisition./s/ Kristy W. House2004-01-07