SAN MIGUEL
OperatingCoal power plant
- Capacity
- 410 MW
- Primary fuel
- Coal
- County
- Atascosa County
- Operator
- SAN MIGUEL ELECTRIC COOP, INC
- Status
- Operating
- Commissioned
- 1982
- EIA plant ID
- 6183
- Generators
- 1
- Technology
- Conventional Steam Coal
- Net generation (2024)
- 1,305 GWh
- Capacity factor (2024, EIA nameplate)
- 36%
- Data vintage
- EIA-860 2024 final; EIA-923 2022-2024 final
- Coordinates
- 28.7044, -98.4775
SAN MIGUEL, a 410 MW Coal power plant in Atascosa County, Texas. Operated by SAN MIGUEL ELECTRIC COOP, INC, commissioned 1982.
How SAN MIGUEL compares
With 410 MW of capacity, SAN MIGUEL ranks 89th among the 307 operating power plants Bywatts maps in Texas and 11th of the 12 operating Coal plants in the state. It accounts for about 2.2% of Texas's operating Coal capacity and 0.4% of all operating capacity in the state. Nationally it is the 174th-largest of the 324 operating Coal plants in the database. Commissioned in 1982, it is older than 75% of the 303 operating Texas plants with a recorded commissioning year.
EIA-860 lists 1 generator at the site with 410 MW of nameplate capacity, all conventional steam coal technology. Net generation was 1,305 GWh in 2024 (a 36% capacity factor), down 38% from 2022.
Grid neighborhood
The closest transmission line found within 10 miles is a 138 kV line owned by AEP TEXAS CENTRAL COMPANY, under 0.1 miles away.
Computed by Bywatts from HIFLD power plant and transmission line records and EIA-860/923 survey data; distances are straight-line. Sources and methodology
Weather peril exposure
SAN MIGUEL is a 410 MW coal power plant in Atascosa County, TX, operated by SAN MIGUEL ELECTRIC COOP, INC, commissioned in 1982. Atascosa County carries high modeled catastrophe exposure in the FEMA National Risk Index, scoring 3.8 of 5 at the 69th national percentile. Hail is the leading peril, rated Relatively Moderate by FEMA at the 76th percentile.
The Bywatts loss layer is calibrated to solar PV hardware, so it is not applied to a coal plant. The ratings below are the FEMA National Risk Index county hazard ratings for this location.
Atascosa County hazard ratings
| Peril | FEMA rating | National percentile | Peril score | Events per year |
|---|---|---|---|---|
| Hail | Relatively Moderate | 76th | 4.0 of 5 | 2.1 |
| Wildfire | Relatively Low | 67th | 3.7 of 5 | <0.01 |
| Hurricane | Relatively Low | 55th | 3.2 of 5 | 0.06 |
| Strong wind | Relatively Low | 51st | 3.1 of 5 | 0.76 |
| Heat wave | Relatively Moderate | 47th | 2.9 of 5 | 11.1 |
| Tornado | Relatively Moderate | 40th | 2.6 of 5 | 0.37 |
| Lightning | Relatively Moderate | 38th | 2.5 of 5 | 43.4 |
| Winter weather | Relatively Low | 28th | 2.1 of 5 | 1.6 |
| Riverine flooding | Relatively Low | 24th | 2.0 of 5 | 2.6 |
| Ice storm | Relatively Low | 8th | 1.3 of 5 | 0.16 |
| Earthquake | Very Low | 6th | 1.2 of 5 | <0.01 |
Perils not assessed in Atascosa 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 |
|---|---|
| Coastal flooding | FEMA rating is "Not Applicable" for this county |
Model hail, wind and flood exposure for Atascosa 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.