In Los Angeles County, California (CA). The map on this page is placed at the coordinates EIA files for the plant, which locate the site rather than any individual unit.

2 GW of nameplate capacity across 7 units, as of the EIA-860M release for 2026-07.

EIA-860M names Los Angeles Department of Water & Power as the reporting entity. That is the operator of record on the survey, which is not always the ultimate owner.

Is this the same as Castaic LLC?

Probably, but EIA-860M does not say. The survey records a plant name and a reporting entity — Los Angeles Department of Water & Power here — not the project company that holds the asset. Project companies are commonly registered as an LLC carrying the plant's name, so a search for "Castaic LLC" usually means this site. This page shows only what EIA files, and does not assert a corporate structure it cannot see.

Is Castaic still running?

EIA-860M files it as "Operating" for 2026-07. Statuses change monthly, and this page follows the monthly release.

Castaic

Castaic is a 2 GW pumped storage hydro plant in Los Angeles County, California, operated by Los Angeles Department of Water & Power. EIA-860M lists 7 generating units here. Its units entered service between 1972 and 1978.

As of 2026-07 (inventory dated 2026-07-31) · EIA-860M Preliminary Monthly Electric Generator Inventory · eia.gov/…/july_generator2026.xlsx · eia.gov/…/eia860m

Nameplate capacity: 1,682 MW; 1,674.5 MW net summer
Generating units: 7
In service: 1972–1978
EIA plant ID: 392

Where it is

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County: Los Angeles County, California
Coordinates: 34.5872, -118.6566
Balancing authority: LDWP
Sector: Electric Utility

Units, technology and status

Operator of record: Los Angeles Department of Water & Power
Primary energy source: Pumped storage
Technologies: Conventional Hydroelectric, Hydroelectric Pumped Storage
Status: Operating

This site runs on more than one energy source. EIA-860M capacity splits: Pumped storage 2 GW, Hydro 56 MW. It is filed here under Pumped storage, the source with the most capacity.

Every plant Los Angeles Department of Water & Power reports to EIA →

Castaic: FAQ

Where is Castaic?: In Los Angeles County, California (CA). The map on this page is placed at the coordinates EIA files for the plant, which locate the site rather than any individual unit.
How big is Castaic?: 2 GW of nameplate capacity across 7 units, as of the EIA-860M release for 2026-07.
Who owns Castaic?: EIA-860M names Los Angeles Department of Water & Power as the reporting entity. That is the operator of record on the survey, which is not always the ultimate owner.
Is this the same as Castaic LLC?: Probably, but EIA-860M does not say. The survey records a plant name and a reporting entity — Los Angeles Department of Water & Power here — not the project company that holds the asset. Project companies are commonly registered as an LLC carrying the plant's name, so a search for "Castaic LLC" usually means this site. This page shows only what EIA files, and does not assert a corporate structure it cannot see.
Is Castaic still running?: EIA-860M files it as "Operating" for 2026-07. Statuses change monthly, and this page follows the monthly release.