X0202 4 2005-02-04 0 0000856716 WESTERN GAS RESOURCES INC WGR 0001228362 STONEHOCKER WALTER L 1099 18TH STREET, SUITE 1200 DENVER CO 80202 1 0 0 0 Common Stock 2005-02-04 4 S 0 10000 32.50 D 4383506 I See Footnote 1 Reporting Person holds 2,343,314 shares of common stock directly, Reportoing Person's spouse holds 2,037,732 shares of common stock directly and the Reporting Person and his spouse hold 2,460 shares of common stock as joint tenants. Shares sold pursuant to the terms of an irrevocable 10b-5-1 Plan. /s/ John C. Walter, as Attorney-in Fact for Walter L. Stonehocker 2005-02-04