American Bank Building, Casper, WY No description specified. 1-3 (3 Records) Documents Letter Report: Archeological Survey of 120 Acre Tract, Natrona County, Wyoming (1982) Letter Report: Archeological Survey of 40 Acre Tract, Natrona County, Wyoming (1982) Letter Report: Archeological Survey of Well Site; W.W. Butler #6-12C, Natrona County, Wyoming (1981)