AES ALAMITOS LLC

Operating

Natural Gas power plant

Capacity
1,997 MW
Primary fuel
Natural Gas
County
Los Angeles County
Operator
AES ALAMITOS LLC
Status
Operating
Commissioned
1961
EIA plant ID
315
Generators
3
Technology
Natural Gas Steam Turbine
Net generation (2024)
34 GWh
Capacity factor (2024, EIA nameplate)
0.4%
Data vintage
EIA-860 2024 final; EIA-923 2022-2024 final
Coordinates
33.7688, -118.1009

See it on the map

AES ALAMITOS LLC, a 1,997 MW Natural Gas power plant in Los Angeles County, California. Operated by AES ALAMITOS LLC, commissioned 1961.

How AES ALAMITOS LLC compares

With 1,997 MW of capacity, AES ALAMITOS LLC ranks 3rd among the 874 operating power plants Bywatts maps in California and 2nd of the 190 operating Natural Gas plants in the state. It accounts for about 5.4% of California's operating Natural Gas capacity and 2.8% of all operating capacity in the state. Nationally it is the 14th-largest of the 1,185 operating Natural Gas plants in the database. Commissioned in 1961, it is older than 90% of the 859 operating California plants with a recorded commissioning year. It shares Los Angeles County with 110 other operating plants, including CASTAIC and HAYNES.

EIA-860 lists 3 generators at the site with 1,115 MW of nameplate capacity, all natural gas steam turbine technology (this page's HIFLD capacity figure is 1,997 MW). Net generation was 34 GWh in 2024 (a 0.4% capacity factor), down 95% from 2022. Its generators came online between 1961 and 1964.

Grid neighborhood

The nearest named substation is ALAMITOS (230 kV), about 0.2 miles away; the closest transmission line found within 10 miles is a 230 kV line, about 0.2 miles away. Another 51 operating power plants totaling 6,346 MW sit within 25 miles; the largest is HAYNES (1,619 MW, Natural Gas). Within 50 miles are 16 mapped data centers; the nearest is OCDC Orange County Datacenter Santa Ana in Santa Ana, about 14.6 miles away.

Computed by Bywatts from HIFLD power plant, substation and transmission line records, EIA-860/923 survey data and PeeringDB data center locations; distances are straight-line. Sources and methodology

Weather peril exposure

AES ALAMITOS LLC is a 1,997 MW natural gas power plant in Los Angeles County, CA, operated by AES ALAMITOS LLC, commissioned in 1961. Los Angeles County carries moderate modeled catastrophe exposure in the FEMA National Risk Index, scoring 2.0 of 5 at the 25th national percentile. Earthquake is the leading peril, rated Very High by FEMA at the 99th percentile.

The Bywatts loss layer is calibrated to solar PV hardware, so it is not applied to a natural gas plant. The ratings below are the FEMA National Risk Index county hazard ratings for this location.

2.0 of 5Modeled catastrophe exposure
ModerateExposure band
EarthquakeLeading peril
Very HighFEMA county risk rating

Los Angeles County hazard ratings

PerilFEMA ratingNational percentilePeril scoreEvents per year
EarthquakeVery High99th5.0 of 50.09
WildfireVery High98th4.9 of 5<0.01
Riverine floodingVery High92nd4.7 of 54.0
Heat waveRelatively High50th3.0 of 59.5
Coastal floodingRelatively High34th2.4 of 52.2
TornadoRelatively High13th1.5 of 50.49
HailRelatively Moderate12th1.5 of 50.10
Strong windRelatively Moderate0th1.0 of 50.15
Winter weatherRelatively Moderate0th1.0 of 56.6
LightningVery High0th1.0 of 58.4

Perils not assessed in Los Angeles County

These perils carry no usable National Risk Index figure for this county, so they are excluded from the scoring rather than scored zero. A zero would claim the peril was assessed and found benign.

PerilWhy it is not scored
HurricaneFEMA rating is "No Rating" for this county
Ice stormFEMA rating is "Not Applicable" for this county

Model hail, wind and flood exposure for Los Angeles County in the weather risk calculator

Ratings are the FEMA National Risk Index county hazard ratings; the peril score is a Bywatts transform of the FEMA national percentile. Full data sources and the solar vulnerability methodology are in the weather risk calculator.

Modeled estimate for screening and negotiation. Built from FEMA National Risk Index county hazard data and a solar vulnerability layer documented above. Not a quote, a binder, or actuarial advice, and not a substitute for a carrier's own model. Hazard data: FEMA National Risk Index December 2025, synced 2026-07-24. Resolution is county level, not site level.