Raven Rock Mountain Complex Site R, PA Archaeological Site Revisit

The U.S. Congress codified the National Historic Preservation Act of 1966 NHPA in part by establishing the National Register of Historic Places NRHP, which requires federal agencies to address their cultural re-sources. NHPA Section 110 requires federal agencies to inventory and evaluate their cultural resources, and Section 106 requires them to determine the effect of federal undertakings on those potentially eligible for the NRHP. In 2017, ERDC-CERL was tasked with conducting a Phase I Archaeological survey of Raven Rock Mountain Complex RRMC Site R in Pennsylvania, which was built in 1951 and is now a division of the Washington Headquarters Service. In 2001, U.S. Army Corps of Engineers Baltimore District conducted an archaeological Phase I survey of the Site R facility. A 2017 historical resources survey of the facility recommended additional archaeological resources research to supplement the 2001 survey. This report provides supple-mental historic context and field documentation of archaeological sites and features described in the 2001 report. In consultation with the Pennsylvania State Historic Preservation Officer, this work fulfills Section 110 processes for the land at Site R.