| Elderberry Forebay | |
|---|---|
  Elderberry Forebay | |
| Location | Los Angeles County, California |
| Coordinates | 34°34′19″N118°38′16″W / 34.5719°N 118.6379°W /34.5719; -118.6379[1] |
| Type | Reservoir |
| Primary inflows | West Branch California Aqueduct |
| Primary outflows | Castaic Creek |
| Catchment area | 81.6 square miles (211 km2)[2] |
| Basin countries | United States |
| Surface area | 450 acres (180 ha)[2] |
| Water volume | 28,400 acre⋅ft (35.0×10 |
| Surface elevation | 1,519 feet (463 m)[1] |
| References | [1][2] |
Elderberry Forebay is a smallreservoir inLos Angeles County,California, which serves as the pumpingforebay of theCastaic Power Plant. It located at the upper end of the largerCastaic Lake and is separated from the lake byElderberry Forebay Dam at its southern edge. Entering the northern end of the forebay is thewest branch of theCalifornia Aqueduct, which connects the forebay toPyramid Lake through theAngeles Tunnel.[2][3]
A component of theCalifornia State Water Project, the reservoir was partitioned from Castaic Lake in 1974 to store water forpumped-storage hydroelectricity generation.[2][3] Duringon-peak energy-demand hours, water flows 7.5 miles (12.1 km) from Pyramid Lake through the Angeles Tunnel and then on to the turbines of the Castaic Power Plant, producingelectricity. From there, the water flows into Elderberry Forebay. During off-peak hours (including nighttime and Sundays), water is pumped from the forebay, back through the tunnel and into Pyramid Lake.[3]
| CA Department of Water Resources |  | |
|---|---|---|
| LA Department of Public Works | ||
| LA Department of Water and Power |
| |
| US Army Corps of Engineers | ||
| Other |
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