Western Geophysical Company, Englewood, Co No description specified. 1-3 (3 Records) Documents Archaeological Survey of a Proposed Seismic Line North of Hatch Trading Post, San Juan County, Utah (1982) Archaeological Survey of Western Geophysical Company's '3d' project Located in Southeastern San Juan County, Utah (1985) Archeological Survey of Six Seismic Lines in Emery County, UT (1983)