0001193125-06-104985 8-K 1 20060508 2.02 20060509 20060509 POTLATCH CORP 0001338749 6798 820156045 DE 1231 8-K 34 001-32729 06819720 601 WEST RIVERSIDE AVENUE SUITE 1100 SPOKANE WA 99201 (509) 835-1500 601 WEST RIVERSIDE AVENUE SUITE 1100 SPOKANE WA 99201 Potlatch Holdings, Inc. 20050914 8-K 1 d8k.htm FORM 8-K