Amoco Oil Production Co., Riverton, WY No description specified. 1-1 (1 Record) Documents Letter Report: Archeological Survey for the Amoco Production Company Champlin 278 Amoco D Well #1, Champlin 278 Amoco B Well #1, Champlin 261 Amoco C Well #1, and Champlin 261 Amoco B Well #1 and Associated Access Roads (1978)