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The Warne Plant was constructed by the state of California in 1983. Pyramid Lake has a surface area of 1,380 acres (560 ha) and a storage capacity of 180,000 acre-feet (220,000,000 m 3) with a maximum water surface elevation of 2,578 feet (786 m) above sea level. Pyramid Lake is the upper forebay for the Castaic Power Plant.
The 1,495 MW (Nominal) Castaic Pumped-Storage Plant is located at the upper end of the west arm of Castaic Lake. The Elderberry Forebay Dam separates the upper arm from the rest of Castaic Lake, maintaining a small pool for power generation known as the Elderberry Forebay, serving as the lower reservoir of the pumped-storage operation.
From Pyramid Lake, water is released through the Angeles Tunnel to the Castaic Power Plant on Elderberry Forebay and the 325,000 acre⋅ft (0.401 km 3) Castaic Lake reservoir located north of Santa Clarita. Castaic Power Plant is a pumped-storage hydroelectric plant capable of producing 1,247 MW on peak demand.
The Diablo Canyon Power Plant in San Luis Obispo County is the largest power station in California with a nameplate capacity of 2,256 MW and an annual generation of 18,214 GWh in 2018. [6] The largest under construction is the Westlands Solar Park in Kings County , which will generate 2,000 MW when completed in 2025.
The dam partitions Elderberry Forebay from Castaic Lake. It forms the headwater reservoir for Castaic Power Plant , a pumped-storage hydroelectricity generation facility. [ 1 ] [ 3 ] The dam was completed in 1974 as part of the California State Water Project .
(This story has been officially corrected by Element Fuels to fix the capacity of the planned power plant to 165 megawatts, not 165 megawatts per day, in paragraph 8)
The following page lists all pumped-storage hydroelectric power stations that are larger than 1,000 MW in installed generating capacity, which are currently operational or under construction. Those power stations that are smaller than 1,000 MW , and those that are decommissioned or only at a planning/proposal stage may be found in regional ...
All three of these are nuclear power plants, and eight of the top 10 power plants with the largest annual net generation in 2021 are nuclear power plants. [2] The largest power generating facility under construction is the Chokecherry and Sierra Madre Wind Energy Project in Wyoming, which will generate 2,500-3,000 MW when completed in 2026. [3]