B.F. Sisk Dam
The B.F. Sisk Dam is a 300-foot-high zoned compacted earthfill embankment located on the west side of California's Central Valley approximately 12 miles west of Los Banos, California. The dam is over 3 ½ miles long and impounds San Luis Reservoir which has a total capacity of over 2 million acre-feet.
The dam was built between 1963 and 1967 to provide supplemental irrigation water storage for the Federal Central Valley Project and municipal and industrial water for the California State Water Project.
Water is lifted into the reservoir for storage by the Gianelli Pumping – Generating Plant from the California Aqueduct and from the Delta-Mendota Canal via O’Neill Forebay.
B.F. Sisk Dam (also known as San Luis Dam) is owned by the Bureau of Reclamation and operated by the California Department of Water Resources. Reservoir storage space is allotted 55 percent State and 45 percent Federal.