RAFT RIVER GEOTHERMAL POWER PLANT
OperatingGeothermal power plant
- Capacity
- 18 MW
- Primary fuel
- Geothermal
- County
- Cassia County
- Operator
- US GEOTHERMAL INC.
- Status
- Operating
- Commissioned
- 2008
- EIA plant ID
- 56317
- Coordinates
- 42.0995, -113.3825
RAFT RIVER GEOTHERMAL POWER PLANT, an 18 MW Geothermal power plant in Cassia County, Idaho. Operated by US GEOTHERMAL INC., commissioned 2008.
Weather peril exposure
RAFT RIVER GEOTHERMAL POWER PLANT is an 18 MW geothermal power plant in Cassia County, ID, operated by US GEOTHERMAL INC., commissioned in 2008. Cassia County carries moderate modeled catastrophe exposure in the FEMA National Risk Index, scoring 2.0 of 5 at the 24th national percentile. Wildfire is the leading peril, rated Relatively Moderate by FEMA at the 99th percentile.
The Bywatts loss layer is calibrated to solar PV hardware, so it is not applied to a geothermal plant. The ratings below are the FEMA National Risk Index county hazard ratings for this location.
Cassia County hazard ratings
| Peril | FEMA rating | National percentile | Peril score | Events per year |
|---|---|---|---|---|
| Wildfire | Relatively Moderate | 99th | 5.0 of 5 | 0.01 |
| Earthquake | Relatively Low | 81st | 4.3 of 5 | <0.01 |
| Riverine flooding | Relatively Low | 61st | 3.5 of 5 | 0.75 |
| Heat wave | Relatively Low | 53rd | 3.1 of 5 | 2.5 |
| Strong wind | Relatively Low | 37th | 2.5 of 5 | 0.51 |
| Winter weather | Relatively Moderate | 34th | 2.4 of 5 | 15.3 |
| Lightning | Relatively Moderate | 25th | 2.0 of 5 | 28.4 |
| Hail | Very Low | 18th | 1.7 of 5 | 0.30 |
| Ice storm | Very Low | 18th | 1.7 of 5 | 0.01 |
| Tornado | Very Low | 11th | 1.4 of 5 | 0.22 |
Perils not assessed in Cassia 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 "Not Applicable" for this county |
| Coastal flooding | FEMA rating is "Not Applicable" for this county |
Model hail, wind and flood exposure for Cassia 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.