GEISMAR
OperatingNatural Gas power plant
- Capacity
- 84 MW
- Primary fuel
- Natural Gas
- County
- Ascension Parish
- Operator
- BASF CORPORATION
- Status
- Operating
- Commissioned
- 1985
- EIA plant ID
- 10319
- Coordinates
- 30.2030, -90.9959
GEISMAR, an 84 MW Natural Gas power plant in Ascension Parish, Louisiana. Operated by BASF CORPORATION, commissioned 1985.
Weather peril exposure
GEISMAR is an 84 MW natural gas power plant in Ascension Parish, LA, operated by BASF CORPORATION, commissioned in 1985. Ascension Parish carries critical modeled catastrophe exposure in the FEMA National Risk Index, scoring 4.4 of 5 at the 84th national percentile. Hurricane is the leading peril, rated Relatively High by FEMA at the 97th 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.
Ascension Parish hazard ratings
| Peril | FEMA rating | National percentile | Peril score | Events per year |
|---|---|---|---|---|
| Hurricane | Relatively High | 97th | 4.9 of 5 | 0.24 |
| Lightning | Relatively High | 75th | 4.0 of 5 | 87.3 |
| Heat wave | Relatively Moderate | 64th | 3.6 of 5 | 14.9 |
| Tornado | Relatively High | 53rd | 3.1 of 5 | 0.24 |
| Hail | Relatively Moderate | 50th | 3.0 of 5 | 1.4 |
| Ice storm | Relatively Moderate | 43rd | 2.7 of 5 | 0.39 |
| Coastal flooding | Relatively Moderate | 42nd | 2.7 of 5 | 3.8 |
| Earthquake | Very Low | 31st | 2.3 of 5 | <0.01 |
| Winter weather | Relatively Low | 21st | 1.8 of 5 | 0.95 |
| Wildfire | Very Low | 20th | 1.8 of 5 | <0.01 |
| Riverine flooding | Relatively Moderate | 14th | 1.5 of 5 | 0.68 |
| Strong wind | Relatively Moderate | 13th | 1.5 of 5 | 1.2 |
Model hail, wind and flood exposure for Ascension Parish 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.