X0201 42003-07-30 0000079716 POTLATCH CORP PCH 0001184042 PEIROS LARRY W. 601 RIVERSIDE AVENUE, SUITE 1100 SPOKANE WA 99201 1000Common Stock2003-07-304P0200026.00A2000DMalcolm A. Ryerse, Attorney-in-fact2003-08-01