Lake Pillsbury is located in northern California near Potter Valley. It was formed in 1921 by the construction of Scott Dam on the Eel River. The lake is primarily fed by the Eel River and its tributaries, and it serves as a vital source of water for agricultural and recreational uses downstream. The hydrology of the lake is heavily influenced by the surrounding snowpack and surface flow from nearby streams. The lake's 24-hour average water level is measured daily to monitor changes in water levels and track precipitation patterns. The lake is used for recreational activities such as boating, fishing, and camping, and it also provides water for agriculture in the nearby Potter Valley. However, in recent years, concerns have been raised about the lake's water levels due to drought conditions and increased demand for water resources in the region.