B.F. Sisk Dam is a 380-foot-high zoned compacted earthfill embankment located on the west side of California's Central Valley 12 miles west of Los Banos, California. The dam is more than 3.5 miles long and impounds San Luis Reservoir which has a total capacity of more than 2 million acre-feet.
The dam was built between 1963 and 1967 to provide supplemental irrigation water storage for the federal Central Valley Project (CVP) and municipal and industrial water for the California State Water Project (SWP). 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 (DWR). Reservoir storage space is allotted 55% state and 45% federal.
San Luis Creek
National ID Number
Hydraulic Height (Normal Operating Depth at Dam)
Top of Active Conservation Pool (Elevation)
Top of Inactive Conservation Pool (Elevation)
Spillway Crest Elevation
Top of Dead Storage Pool (Elevation)
Streambed at Dam Axis
Hydraulics & Hydrology
Normal Water Surface Elevation
Spillway Capacity at Elevation
1030 cfs at 545.8 ft
Outlet Works Capacity at Elevation
13120 cfs at 544.0 ft
82.6 sq mi
Hydrometeorological Report (HMR)
Title: Area Office Manager Organization: South-Central California Area Office Address: 1243 "N" Street City: Fresno, CA 93721-1813 Phone: 559-262-0300
Organization: California Department of Water Resources Address: San Luis Field Division City: Gustine, CA 93522 Phone: 209-827-5100
More Information about the U.S. Bureau of Reclamation