In 1983 P-III Associates conducted a data recovery program on six prehistoric sites (48UT390, 48UT199, 48UT779, 48UT370, 48UT445 and 48UT377) near Church Butte in southwestern Wyoming for the Frontier Pipeline Company. Excavations at these sites produced archeological assemblages ranging from the Early Archaic period to the Late Prehistoric period. The limited range of data recovered from the Archaic components precluded detailed discussions of Archaic settlement and subsistence patterns. However, the quantity of material recovered from the Late Prehistoric components allowed for some reconstruction of the subsistence pattern during the Late Prehistoric period in the Church Butte area. The bulk of the artifactual material and information about prehistoric lifeways during the Late Prehistoric period was recovered from the Austin Wash Site (48UT390), a Late Prehistoric antelope processing site. At least 15 antelope and two bison were completely processed at this site during a late summer/early fall occupation near the end of the eight century A.D. The range of information recovered during this project is a strong addition to the prehistoric database of southwestern Wyoming.