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O'Neill Pump-Generating Plant

Technology Type Open-loop Pumped Hydro Storage
Rated Power 25200 kW
URL More about O'Neill Pump-Generating Plant
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 horse-power. When operating as turbines and generators, each unit has a generating capacity of about 4,200 kilowatts. O`Neill, which operates primarily as a pumping plant only generates part of the year. The authorizing legislation for O`Neill states that power generated at the facility cannot be used for commercial purposes. Therefore, the generation produced at O`Neill is allocated as project-use power for the Central Valley Project and the cost associated with generation is allocated to the irrigation component of Central Valley Project. Availability Factor: 89.6; Net Generation: 5,404,000 kWh
This data has been validated by project staff through a review of publicly available information about the project, and verified by the project owner.
Project Status
Status Operational
Commissioning On 01.01.1973
Project Includes Multiple Systems No

Los Banos, California
United States

Utility Type
Paired Grid Resource Transmission
Project Includes Multiple Systems No
Ownership & Value Chain Partners
Ownership Model Third-Party-Owned
Equity Owner 1 Bureau of Reclamation
Cost & Performance
Service Use Case Electric Energy Time Shift
Electric Supply Capacity
Frequency Regulation
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