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O'Neill Pump-Generating Plant

Technology Type Open-loop Pumped Hydro Storage
Rated Power 25200 kW
Duration at Rated Power (HH:MM) 0:15.00 / 0.00
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. Information is accurate as of 2016-04-29.
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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