AES ALAMITOS LLC
OperatingNatural 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
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.
Los Angeles County hazard ratings
| Peril | FEMA rating | National percentile | Peril score | Events per year |
|---|---|---|---|---|
| Earthquake | Very High | 99th | 5.0 of 5 | 0.09 |
| Wildfire | Very High | 98th | 4.9 of 5 | <0.01 |
| Riverine flooding | Very High | 92nd | 4.7 of 5 | 4.0 |
| Heat wave | Relatively High | 50th | 3.0 of 5 | 9.5 |
| Coastal flooding | Relatively High | 34th | 2.4 of 5 | 2.2 |
| Tornado | Relatively High | 13th | 1.5 of 5 | 0.49 |
| Hail | Relatively Moderate | 12th | 1.5 of 5 | 0.10 |
| Strong wind | Relatively Moderate | 0th | 1.0 of 5 | 0.15 |
| Winter weather | Relatively Moderate | 0th | 1.0 of 5 | 6.6 |
| Lightning | Very High | 0th | 1.0 of 5 | 8.4 |
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.
| Peril | Why it is not scored |
|---|---|
| Hurricane | FEMA rating is "No Rating" for this county |
| Ice storm | FEMA 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.