During 1981 and 1982, the Center for Archaeological Research, The University of Texas at San Antonio, conducted a cultural resources assessment of ca. 30,000 acres leased to the Carter Mining Company in Uvalde and Zavala Counties, Texas. Known as the East Chacon project, the survey was undertaken to identify and assess the cultural resources of the locality prior to potential modification or destruction due to proposed mining operations. Archaeological and historical sites (149) were identified and recorded that represent a span of human activities from approximately 11,000 B.P. to the Historic period. A detailed description of these site locations, interpretations of their culturalenvironmental contexts, and determinations of potential eligibility to the National Register of Historic Places are presented in this report.