← Back to map

AES Alamitos LLCRetirement planned

Los Angeles County, California · EIA plant ID 315 · Operator: AES Alamitos LLC
Natural gasNatural Gas Steam TurbineCAISOBA: CISO
📍 Open in Google Maps
Nameplate1,115MWSummer 1,142 MW
Generators3in service
Net generation8GWh12 mo to Aug 2026
Capacity factor0%gas/coal/oil units, summer MW
Heat rate16,289Btu/kWhfossil units, electric fuel, HHV
First online1961Runs as rarely runs

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
0200400600800GWh2001200320052007200920112013201520172019202120232025

Capacity factor by year

Net MWh ÷ (summer MW × hours), gas/coal/oil units. Each year uses that year's EIA-860 ratings; the hollow dot is the latest 12 months.
0%10%20%200520102015202020250.0% · 12 mo

Heat rate by year

Electric fuel MMBtu × 1000 ÷ net MWh (Btu/kWh, HHV), fossil units only; CT + CA counted as one combined-cycle block.
10,00012,00014,00016,0002005201020152020202516,289 Btu/kWh · 12 mo
Annual data table
YearNet GWhCapacity factorHeat rate (Btu/kWh)
20018,525.9——
20024,101.4——
20033,538.319.1%11,094
20042,954.416.8%11,860
20051,311.17.5%11,715
20061,792.410.3%11,560
20071,476.38.4%11,089
20082,534.414.4%10,871
20091,718.29.8%11,058
2010881.45.0%11,125
20111,025.45.9%12,419
20121,464.78.3%12,154
20131,528.98.7%10,830
20141,369.77.8%11,401
20151,052.86.0%11,863
2016889.45.1%12,380
2017855.14.9%11,777
2018958.35.5%12,891
2019581.13.5%13,891
2020544.35.4%13,022
2021536.85.3%13,259
2022630.56.3%13,075
2023598.35.9%14,190
2024340.3%15,834
202528.20.3%13,417

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 IDTechnologyPrime moverNameplate MWSummer MWOnlineStatusPlanned retirementOEM / model
3Natural Gas Steam TurbineST310327Dec 1961Operating · retirement plannedDec 2026coming soon
4Natural Gas Steam TurbineST310335Jun 1962Operating · retirement plannedDec 2026coming soon
5Natural Gas Steam TurbineST495480Mar 1964Operating · retirement plannedDec 2026coming soon
1ANatural Gas Fired Combined CycleCT231226planned Apr 2020not_current—coming soon
1BNatural Gas Fired Combined CycleCT231226planned Apr 2020not_current—coming soon
1SNatural Gas Fired Combined CycleCA231192planned Apr 2020not_current—coming soon
GEN1—ST175175Sep 1956not_current—coming soon
GEN2—ST175175Feb 1957not_current—coming soon
GEN3—ST320320Dec 1961not_current—coming soon
GEN4—ST320320Jun 1962not_current—coming soon
GEN5—ST480480Mar 1964not_current—coming soon
GEN6—ST480480Sep 1966not_current—coming soon
GEN7Natural Gas Fired Combustion TurbineGT133133Jul 1969not_current—coming soon
1Natural Gas Steam TurbineST156175Sep 1956Retired Dec 2019—coming soon
2Natural Gas Steam TurbineST156175Feb 1957Retired Dec 2019—coming soon
6Natural Gas Steam TurbineST495495Sep 1966Retired Dec 2019—coming soon
7Natural Gas Fired Combustion TurbineGT133133Jul 1969Retired Dec 2003—coming soon

Owner / operator

Operator: AES Alamitos LLC. Ownership shares by in-service nameplate MW (EIA-860 Schedule 4; units not listed there are wholly owned by the operator).
AES Alamitos LLC100.0%1,115 MW

Nearby plants

Within 80 km.
AES ES Alamitos 2 LLC82 MW0.2 km
AES Alamitos Energy Center678 MW0.2 km
AES ES Alamitos, LLC100 MW0.2 km
Haynes1,739 MW0.5 km
CSU Long Beach3 MW1.8 km
CSU Long Beach Lots 7 & 145 MW1.8 km