Diversified Operating Co., Denver, Co No description specified. 1-2 (2 Records) Documents Archeological Survey of 160 Acres for Diversified Operating Co.'s North Sooner Federal 5-9 and 609 Well Sites, Pawnee National Grasslands, Weld County, Colorado (1986) Archeological Survey of 480 Acres for Diversified Operating Company in Pawnee National Grasslands, Weld County, Colorado (1987)