PRAIRIE STATE GENERATNG STATION
OperatingPower plant
- Capacity
- 1,766 MW
- County
- St. Clair County
- Operator
- PRAIRIE STATE GENERATING CO LLC
- Status
- Operating
- Commissioned
- 2012
- EIA plant ID
- 55856
- Coordinates
- 38.2792, -89.6669
PRAIRIE STATE GENERATNG STATION, a 1,766 MW power plant in St. Clair County, Illinois. Operated by PRAIRIE STATE GENERATING CO LLC, commissioned 2012.
Weather peril exposure
PRAIRIE STATE GENERATNG STATION is a 1,766 MW power plant in St. Clair County, IL, operated by PRAIRIE STATE GENERATING CO LLC, commissioned in 2012. St. Clair County carries high modeled catastrophe exposure in the FEMA National Risk Index, scoring 4.0 of 5 at the 76th national percentile. Earthquake is the leading peril, rated Relatively Moderate by FEMA at the 94th percentile.
The Bywatts loss layer is calibrated to solar PV hardware, so it is not applied to this plant. The ratings below are the FEMA National Risk Index county hazard ratings for this location.
St. Clair County hazard ratings
| Peril | FEMA rating | National percentile | Peril score | Events per year |
|---|---|---|---|---|
| Earthquake | Relatively Moderate | 94th | 4.7 of 5 | <0.01 |
| Hail | Relatively High | 80th | 4.2 of 5 | 5.2 |
| Riverine flooding | Relatively High | 79th | 4.1 of 5 | 1.8 |
| Ice storm | Relatively High | 71st | 3.8 of 5 | 1.4 |
| Heat wave | Relatively High | 67th | 3.7 of 5 | 14.8 |
| Tornado | Relatively High | 60th | 3.4 of 5 | 0.58 |
| Winter weather | Relatively High | 60th | 3.4 of 5 | 9.0 |
| Lightning | Relatively High | 45th | 2.8 of 5 | 51.9 |
| Hurricane | Very Low | 9th | 1.3 of 5 | 0.01 |
| Strong wind | Relatively Moderate | 5th | 1.2 of 5 | 6.2 |
| Wildfire | Very Low | 4th | 1.2 of 5 | <0.01 |
Perils not assessed in St. Clair 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 St. Clair 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.