Supplementary investigations into the effects of freshwater immersion on cultural resources of the Lake Mendocino Reservoir basin, Mendocino County, California

) \., \) ~ ~ ~ ' ti> <('/) ~ ~ \...~.. ... \o ~ 6o ~ ~ 5 . Supplementary J:nvestigations into the Etf'ects of Freshwater Immersion on Ou.ltural. Resources of' the Lake Mendocino Reservoir Basin, Mendocino County,. CalltonJia. 3 {' Steven B. ,~toddard David A. F.redrickaon{' Th• ~tbropology Laboratory nom.a State Collll'": Rohnert Park, CalltOrnia 1Jul.7, im+ Submitted in partial satisfaction ot Contract DACW07-78-C-0009, Corps.of Engine.-111, San Francisco District and . Parchase Order Pr/0'29-7-a?f73, National. Park Service Southwest Region, Santa Fe, New Mexico ,. ~ LAKE MENDOCINO RESERVOIR Supplementary Investigations into the Effects of Freshwater Immer­sion on Cultural Resources of the Lake Mendocino Reservoir Basin, Mendocino Countx, California, was written in fulfillment of a cooperatively funded contract by the San Francisco District, U.S. Army Corps of Engineers, and the National Reservoir Inundation Study (NRIS) with the Foundation for Educational Development, California State College, Sonoma. Dr. David A. Fredrickson acted as principal investigator~ and Stephen E. Stoddard directed field operations. The report presents the results of archeo1ogica1 in­vestigations into the mechanical impacts, differential preservation, and site preparation for re-flooding, of several prehistoric and historic sites that have been subjected to freshwater immersion be­tween 1957 and 1976. These sites became available for research as a resu1t of the recent prolonged drought in the west. Following the winter rains of 1977 - 1978~ these sites were re-inundated by Lake Mendocino. A total of six archeological sitei were located and prepared accord­ing to the Guidelines Chapter of the Preliminary Report of the Na­tional Reservoir Inundation Study. Information gathered on mechan­ical impacts through field observation was compared to predicted impacts out1ined in the Preliminary Report. The Relat·ive Impact Chart~ which outlines a matrix of soil types and erosional factors, was used