0001193125-07-103062 S-4 14 20070504 20070504 COLUMBIA BANKING SYSTEM INC 0000887343 6022 911422237 WA 1231 S-4 33 333-142648 07821639 1102 BROADWAY PLAZA TACOMA WA 98402 2533051900 1102 BROADWAY PLAZA TACOMA WA 98402 S-4 1 ds4.htm FORM S-4 EX-5 2 dex5.htm OPINION OF MILLER NASH LLP REGARDING LEGALITY OF SECURITIES EX-8 3 dex8.htm OPINION OF MILLER NASH LLP REGARDING FEDERAL INCOME TAX MATTERS EX-10.1 4 dex101.htm VOTING AGREEMENT OF MOUNTAIN BANK DIRECTORS AND EXECUTIVE OFFICERS EX-10.2 5 dex102.htm DIRECTOR NON-COMPETITION AGREEMENT EX-10.3 6 dex103.htm EMPLOYMENT AGREEMENT BETWEEN ROY T. BROOKS AND COLUMBIA STATE BANK EX-10.4 7 dex104.htm EMPLOYMENT AGREEMENT BETWEEN SHEILA BRUMLEY AND COLUMBIA STATE BANK EX-10.5 8 dex105.htm EMPLOYMENT AGREEMENT BETWEEN STEVE W. MOERGELI AND COLUMBIA STATE BANK EX-23.3 9 dex233.htm CONSENT OF DELOITTE & TOUCHE LLP EX-23.4 10 dex234.htm CONSENT OF STOVALL, GRANDEY & ALLEN, LLP EX-23.5 11 dex235.htm CONSENT OF MCGLADREY & PULLEN, LLP EX-23.6 12 dex236.htm CONSENT OF SANDLER O'NEILL & PARTNERS, L.P. EX-99.1 13 dex991.htm FORM OF PROXY TO BE MAILED TO SHAREHOLDERS OF MOUNTAIN BANK GRAPHIC 14 g33150g96z77.jpg GRAPHIC