The AES Corporation · Los Angeles County · CAISO
AES Alamitos LLC is a natural gas-fired power facility with 1,115 MW of EIA-reported nameplate capacity in Los Angeles County, California, registered as EIA Plant ID 315. AES Alamitos LLC owns and operates the plant.
Investigate technology, capacity, output, price behavior, ownership, and related facilities using this profile plus current grid data.
EIA-reported nameplate capacity; other nameplate and seasonal ratings may differ.
Primary generation technology.
AES Alamitos LLC · Los Angeles County · CAISO
AES Alamitos LLC is currently operating; a closure or retirement is listed for December 31, 2026.
230 kV · Southern California Edison Company
Natural Gas Steam Turbine
AES Alamitos LLC is currently operating; a closure or retirement is listed for December 31, 2026.
AES Alamitos LLC is currently operating; a closure or retirement is listed for December 31, 2026.
230 kV · Southern California Edison Company
Operating generator records and technology attributes reported through EIA-860.
| Generator | Capacity | Technology | Operation | Status |
|---|---|---|---|---|
| 1 | 156 MW 175 MW summer | Natural Gas Steam Turbine Natural Gas · ST | Sep 1956 Retirement: Dec 2019 | Operating |
| 2 | 156 MW 175 MW summer | Natural Gas Steam Turbine Natural Gas · ST | Feb 1957 Retirement: Dec 2019 | Operating |
| 3 | 310 MW 327 MW summer | Natural Gas Steam Turbine Natural Gas · ST | Dec 1961 Retirement: Dec 2026 | Operating |
Monthly EIA generation history and recent market-resource behavior where linked telemetry is available.
Deterministic links to ERCOT market resources, price records, outage disclosures, queue records, and nearby infrastructure. Candidate joins remain labeled until corroborated.
Source-backed project transactions, agreements, land records, permits, and environmental disclosures. Portfolio and adjacent-project facts remain explicitly scoped.
Parties, market resources, and identifiers tied to this asset, with owner, operator, developer, EPC, compliance provider, and interconnecting entity roles kept separate.
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Project milestones and public references behind the asset profile.
EIA-860 lists generator 1 with this operating date.
CAISO
CAISO · Los Angeles County
| 4 | 310 MW 335 MW summer | Natural Gas Steam Turbine Natural Gas · ST | Jun 1962 Retirement: Dec 2026 | Operating |
| 5 | 495 MW 480 MW summer | Natural Gas Steam Turbine Natural Gas · ST | Mar 1964 Retirement: Dec 2026 | Operating |
| 6 | 495 MW 495 MW summer | Natural Gas Steam Turbine Natural Gas · ST | Sep 1966 Retirement: Dec 2019 | Operating |
Monthly generation is reported through EIA-923. Capacity factor uses the current EIA nameplate capacity and is shown only for complete calendar years.
Portfolio membership follows the latest EIA-860 reporting entity. It does not imply ultimate ownership.
EIA-860 lists generator 2 with this operating date.
EIA-860 lists generator 3 with this operating date.
EIA-860 lists generator 4 with this operating date.
EIA-860 lists generator 5 with this operating date.
EIA-860 lists generator 6 with this operating date.
The California Energy Commission certified the separate 1,040 MW Alamitos Energy Center project.
EIA-860 lists a planned retirement for generator 1, generator 2, generator 6.
The separate Alamitos Energy Center became operational with a 1,040 MW combined-cycle configuration.
AES announced agreements with the California Department of Water Resources to extend operation of the Alamitos and Huntington Beach once-through-cooling units through 2026.
EIA-860 lists a planned retirement for generator 3, generator 4, generator 5.
The State Water Resources Control Board resolution extended the compliance date for Alamitos Units 3, 4, and 5 from December 31, 2023, to December 31, 2026.
Answered from the published record above. Questions whose inputs this profile does not carry are omitted rather than estimated.
AES Alamitos LLC has a reported capacity of 1,115 MW. Source: EIA Form 860.
AES Alamitos LLC is a Natural Gas Steam Turbine facility in Los Angeles County, CA, participating in the CAISO market.
AES Alamitos LLC is in Los Angeles County, CA, inside the CAISO balancing area.
AES Alamitos LLC is operated by AES Alamitos LLC according to the EIA generator inventory. Reporting membership does not by itself establish ultimate ownership.
AES Alamitos LLC reports a commercial operation date of 1956. Current status: operating. Source: EIA Form 860.
AES Alamitos LLC reported 25.5 GWh over the twelve months to 2026-04. Figures are net generation as filed to EIA-923.
AES Alamitos LLC interconnects at SCE Alamitos Switching Station, on the Southern California Edison Company system.
By capacity, AES Alamitos LLC ranks #2 of 257 operating plants of the same technology nationally. It ranks #1 of 7 in CA.
Plants within 25 km, nearest first, regardless of technology. Proximity is straight-line distance between mapped plant coordinates; it does not by itself establish a shared point of interconnection.
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