SWP Facilities

The California State Water Project (SWP) is made up of 700 miles of aqueducts, tunnels, siphons, and pipelines, as well as 36 storage facilities, 26 dams, 21 pumping plants, and 9 hydroelectric power generation plants. In addition to providing Californians with a reliable supply of clean water, the SWP and its facilities provide many benefits including flood control, power generation, recreation, fish and wildlife habitat, and more.

ca aqueduct

A spring evening over the California Aqueduct in the San Joaquin Valley.

The California Aqueduct is the primary method of transporting water from Northern California to Southern California. The concrete-lined canal winds its way through the Central Valley, moving water from the Clifton Court Forebay in the Sacramento-San Joaquin Delta down to Lake Perris, the SWP’s southernmost reservoir. Water travels by gravity until it is lifted by pumping plants and then continues its journey south by gravity until the next pumping plant. 

At the Tehachapi Mountains, water is lifted 1,926 feet by fourteen 80,000 horsepower pumps at Edmonston Pumping Plant. The Edmonston Pumping Plant is the highest single-lift pumping plant in the world. From the Tehachapi crossing, water flows into Antelope Valley, where the aqueduct divides into the West Branch and East Branch of the Aqueduct.

Castaic Lake and Dam, part of the State Water Project. DWR/2014

swp pumping plants map

The San Luis Reservoir reached 98 percent of total capacity and 110 percent of historical average in Mach 2017. DWR/2017

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