The San Luis Unit, West San Joaquin Division, was authorized as a part of the Central Valley Project on June 3, 1960, Public Law 86-488. The pump-generating plant was turned over to Delta-Mendota Canal Authority for maintenance in 1994.
The O`Neill Pump-Generating Plant pumps Central Valley Project water for offstream storage. The O`Neill Pump-Generating Plant consists of an intake channel leading off the Delta-Mendota Canal and six pump-generating units. Normally these units operate as pumps to lift water from 45 to 53 feet into the O`Neill Forebay. Water is occasionally released from the forebay to the Delta-Mendota Canal, and these units then operate as generators.
When operating as pumps and motors, each unit can discharge 700 cubic feet per second and has a rating of 6,000 horsepower. When operating as turbines and generators, each unit has a generating capacity of about 4,200 kilowatts. The pump-generating plant was turned over to Delta-Mendota Canal Authority for maintenance in 1994.
Western Electricity Coordinating Council, California-Southern Nevada Power Area
PMA Service Area
Western Area Power Administration, Sierra Nevada Region
Original Nameplate Capacity
Year of Initial Operation
San Luis Creek
Organization: San Luis-Delta Mendota Water Authority Phone: 209-832-6245
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