X0201 42003-12-04 0000079716 POTLATCH CORP PCH 0001185158 GILLIS RUTH ANN M 601 W. RIVERSIDE AVENUE, SUITE 1100 SPOKANE WA 99201 1000Stock Option (right to buy)33.182003-12-044A05000A2013-12-04Common Stock50002500DThe option becomes exercisable in two equal annual installments on December 4, 2004 and 2005.The option has no purchase or sale price, therefore Column 8 has been left blank.Malcolm A. Ryerse, Attorney-in-fact2003-12-05