AUDRAIN GENERATING STATION
OperatingNatural Gas power plant
- Capacity
- 814 MW
- Primary fuel
- Natural Gas
- County
- Audrain County
- Operator
- UNION ELECTRIC CO - (MO)
- Status
- Operating
- Commissioned
- 2001
- EIA plant ID
- 55234
- Generators
- 8
- Technology
- Natural Gas Fired Combustion Turbine
- Net generation (2024)
- 146 GWh
- Capacity factor (2024, EIA nameplate)
- 2.1%
- Data vintage
- EIA-860 2024 final; EIA-923 2022-2024 final
- Coordinates
- 39.3102, -91.5364
AUDRAIN GENERATING STATION, an 814 MW Natural Gas power plant in Audrain County, Missouri. Operated by UNION ELECTRIC CO - (MO), commissioned 2001.
How AUDRAIN GENERATING STATION compares
With 814 MW of capacity, AUDRAIN GENERATING STATION ranks 8th among the 92 operating power plants Bywatts maps in Missouri and is the largest of the 23 operating Natural Gas plants in the state. It accounts for about 16% of Missouri's operating Natural Gas capacity and 4.2% of all operating capacity in the state. Nationally it is the 147th-largest of the 1,185 operating Natural Gas plants in the database. Commissioned in 2001, it is newer than 73% of the 89 operating Missouri plants with a recorded commissioning year. Its operator, UNION ELECTRIC CO - (MO), runs 11 operating plants in Missouri totaling 6,645 MW. It shares Audrain County with 2 other operating plants, MEXICO and MJMEUC GENERATING STATION #1.
EIA-860 lists 8 generators at the site with 814 MW of nameplate capacity, all natural gas fired combustion turbine technology. Net generation was 146 GWh in 2024 (a 2.1% capacity factor).
Grid neighborhood
The nearest named substation is AUDRAIN (345 kV), about 0.1 miles away; the closest transmission line found within 10 miles is a 345 kV line owned by UNION ELECTRIC CO - (MO), under 0.1 miles away. Another 4 operating power plants totaling 372 MW sit within 25 miles; the largest is PENO CREEK (240 MW, Natural Gas).
Computed by Bywatts from HIFLD power plant, substation and transmission line records and EIA-860/923 survey data; distances are straight-line. Sources and methodology
Weather peril exposure
AUDRAIN GENERATING STATION is an 814 MW natural gas power plant in Audrain County, MO, operated by UNION ELECTRIC CO - (MO), commissioned in 2001. Audrain County carries high modeled catastrophe exposure in the FEMA National Risk Index, scoring 3.5 of 5 at the 62nd national percentile. Earthquake is the leading peril, rated Relatively Low by FEMA at the 83rd 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.
Audrain County hazard ratings
| Peril | FEMA rating | National percentile | Peril score | Events per year |
|---|---|---|---|---|
| Earthquake | Relatively Low | 83rd | 4.3 of 5 | <0.01 |
| Winter weather | Relatively Moderate | 80th | 4.2 of 5 | 9.8 |
| Heat wave | Relatively Moderate | 71st | 3.8 of 5 | 10.6 |
| Hail | Relatively Low | 70th | 3.8 of 5 | 4.1 |
| Riverine flooding | Relatively Low | 61st | 3.4 of 5 | 1.3 |
| Ice storm | Relatively Low | 59th | 3.4 of 5 | 1.0 |
| Lightning | Relatively Moderate | 56th | 3.2 of 5 | 49.4 |
| Tornado | Relatively Low | 47th | 2.9 of 5 | 0.35 |
| Wildfire | Very Low | 38th | 2.5 of 5 | <0.01 |
| Strong wind | Relatively Moderate | 26th | 2.0 of 5 | 3.9 |
| Hurricane | Very Low | 10th | 1.4 of 5 | <0.01 |
Perils not assessed in Audrain 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 Audrain 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.