The Potter Valley Project (Project) is located in northern California, in the Upper Eel River and Russian River watersheds, in Lake and Mendocino counties. The main storage reservoir for the Project, Lake Pillsbury, is formed behind Scott Dam, which is located on the Eel River.  Water captured and stored in Lake Pillsbury is released into the Eel River and then captured again in Van Arsdale Reservoir, an approximately 65-acre reservoir formed behind Cape Horn Dam.  Water captured in Van Arsdale Reservoir is diverted and conveyed to the Potter Valley Powerhouse, which is located just north of a predominately agricultural area known as the Potter Valley. After generating power, water is discharged via canal into the East Branch Russian River, or into irrigation canals, used by the Potter Valley Irrigation District (PVID) to provide irrigation water to farmers in the Potter Valley. The water discharged to the East Branch Russian River is captured in Lake Mendocino, which is administered by the U.S. Army Corps of Engineers for flood protection, but also stores water used by the Sonoma County Water Agency (SWCA).