This document details the results of the data recovery phase of the Bairoil Archaeological Project conducted by Mariah Associates, Inc. (Mariah) for Amoco Production Company (Amoco). The data recovery phase consisted of block excavations at nine archaeological sites and represented the second phase of archaeological investigations conducted under the Data Recovery Plan for Historic Properties (DRP) at Bairoil (Zale 1989). This DRP is a component of the Bairoil Cultural Resource Management Plan to be prepared by the Bureau of Land Management (BLM). The DRP was designed to direct a data recovery effort in connection with the treatment of various archaeological remains discovered since 1987 as a result of Amoco’s Bairoil C02 Spur Pipeline and Enhanced Oil Recovery Projects at Bairoil.