Hpc, Inc., Reliance, Wyoming No description specified. 1-2 (2 Records) Documents Intensive Cultural Resource Survey of the Hpc Inc. Trit On Unit #7 Well Pad and Access R / W, Sweetwater County, Wyoming (1981) Intensive Cultural Resource Survey of the Hpc Surface Water Line From Great Divide Unit #9 To Great Divide Unit #10, Sweetwater County, Wyoming (1982)