The Cedar Siding Shelter, recorded as archaeological property 42EM1533, is a prehistorically occupied rockshelter site located on Bureau of Land Management (BLM) lands in Emery County, Utah, approximately 40km southeast of Price. Originally identified during an intensive cultural resources inventory of a proposed 5.5-mile realignment of the Denver & Rio Grande Western Railroad (D&RGW) track conducted in May 1982, the site was determined likely to contain undisturbed stratified subsurface cultural deposits and was deemed potentially eligible to the National Register of Historic Places (Grand River Institute 1982a). To mitigate the probable direct, adverse effects of the proposed construction on the site, a data recovery (treatment) plan was prepared by Grand River Institute and submitted to the Advisory Council and the BLM (Grand River Institute 1982b). Upon the agencies' approval of the plan, Project Archaeologist Curtis W. Martin and crew returned to the site in July and conducted a 3-weeklong testing program to assess the nature and extent of subsurface cultural deposits. Testing revealed several in situ features, several diagnostic artifacts, and undisturbed cultural deposits at as much as one meter deep, thus indicating the indispensibility of a full excavation. Such began on 16 August 1982 and continued through 2 October when it was determined that further investigations at the site would not yield significant new data except in certain proveniences where excavation was not feasible.