Black Buttes Coal Company, Point of Rocks, WY No description specified. 1-2 (2 Records) Documents Letter Report: Inspection of the Historical Sites Located With in the Black Buttes Coal Company Lease Area April 30, 1982 Edition (1982) Letter Report: Inspection of the Historical Sites Located Within the Black Buttes Coal Company Lease Area, October 28, 1981 Edition (1981)