Castaic
Los Angeles County, California · EIA plant ID 392 · Operator: Los Angeles Department of Water & Power
Nameplate1,682MWSummer 1,675 MW
Generators7in service
Net generation165GWh12 mo to Aug 2026
Capacity factor0%hydro units, summer MW
Heat rate—thermal plants only
First online1972
The 12-month figures include preliminary EIA-923 months, which EIA revises. Final data runs through Dec 2025.
Monthly net generation
EIA-923, all units at the plant. Net of station use; storage can go negative.
FinalPreliminary
Capacity factor by year
Net MWh ÷ (summer MW × hours), hydro units. Each year uses that year's EIA-860 ratings; the hollow dot is the latest 12 months.
Heat rate by year
Electric fuel MMBtu × 1000 ÷ net MWh (Btu/kWh, HHV), fossil units only; CT + CA counted as one combined-cycle block.
Heat rate applies to fuel-burning (thermal) units only.
Annual data table
| Year | Net GWh | Capacity factor | Heat rate (Btu/kWh) |
|---|---|---|---|
| 2001 | -49 | — | — |
| 2002 | 342.4 | — | — |
| 2003 | 314.8 | 71.8% | — |
| 2004 | 458 | 94.8% | — |
| 2005 | 295.8 | 0.0% | — |
| 2006 | 368.5 | 0.0% | — |
| 2007 | 585.1 | 0.0% | — |
| 2008 | 410.7 | 12.0% | — |
| 2009 | 465.4 | 0.0% | — |
| 2010 | 241.5 | 0.0% | — |
| 2011 | 184.1 | 0.0% | — |
| 2012 | 452.9 | 0.0% | — |
| 2013 | 464 | 0.0% | — |
| 2014 | 183.6 | 0.0% | — |
| 2015 | 334.1 | 0.0% | — |
| 2016 | 378.9 | 0.0% | — |
| 2017 | 356.7 | 0.0% | — |
| 2018 | 232.4 | 0.0% | — |
| 2019 | 193.1 | 0.0% | — |
| 2020 | 274.3 | 0.0% | — |
| 2021 | 118.8 | 0.0% | — |
| 2022 | 139.4 | 0.0% | — |
| 2023 | 136.3 | 0.0% | — |
| 2024 | 93.3 | 0.0% | — |
| 2025 | 158.9 | 0.0% | — |
Generators
EIA-860 (annual) with EIA-860M updates through Sep 2026. EIA-923 reports generation by plant, prime mover and fuel, not by unit, so unit-level output isn't shown.
| Gen ID | Technology | Prime mover | Nameplate MW | Summer MW | Online | Status | Planned retirement | OEM / model |
|---|---|---|---|---|---|---|---|---|
| 1 | Hydroelectric Pumped Storage | PS | 271 | 270.5 | Sep 1973 | Operating | — | coming soon |
| 2 | Hydroelectric Pumped Storage | PS | 271 | 270.5 | Jul 1974 | Operating | — | coming soon |
| 3 | Hydroelectric Pumped Storage | PS | 271 | 270.5 | Jul 1976 | Operating | — | coming soon |
| 4 | Hydroelectric Pumped Storage | PS | 271 | 270.5 | Jun 1977 | Operating | — | coming soon |
| 5 | Hydroelectric Pumped Storage | PS | 271 | 270.5 | Dec 1977 | Operating | — | coming soon |
| 6 | Hydroelectric Pumped Storage | PS | 271 | 270.5 | Aug 1978 | Operating | — | coming soon |
| 7 | Conventional Hydroelectric | HY | 56 | 51.5 | Jan 1972 | Operating | — | coming soon |
Owner / operator
Operator: Los Angeles Department of Water & Power. Ownership shares by in-service nameplate MW (EIA-860 Schedule 4; units not listed there are wholly owned by the operator).
| Los Angeles Department of Water & Power | 100.0% | 1,682 MW |
Nearby plants
Within 80 km.
| Foothill Feeder | 9 MW | 9.2 km |
| Homestead Energy Storage LLC | — | 11.5 km |
| San Francisquito 2 | 46 MW | 13.4 km |
| W E Warne | 74 MW | 16.2 km |
| Santa Felicia Dam | 1 MW | 16.4 km |
| Ameresco Chiquita Canyon | 9 MW | 17.3 km |