CALISTOGA POWER PLANT
OperatingGeothermal power plant
- Capacity
- 176 MW
- Primary fuel
- Geothermal
- County
- Lake County
- Operator
- GEYSERS POWER CO LLC
- Status
- Operating
- Commissioned
- 1984
- EIA plant ID
- 50066
- Coordinates
- 38.7879, -122.7434
CALISTOGA POWER PLANT, a 176 MW Geothermal power plant in Lake County, California. Operated by GEYSERS POWER CO LLC, commissioned 1984.
Weather peril exposure
CALISTOGA POWER PLANT is a 176 MW geothermal power plant in Lake County, CA, operated by GEYSERS POWER CO LLC, commissioned in 1984. Lake County carries moderate modeled catastrophe exposure in the FEMA National Risk Index, scoring 2.4 of 5 at the 35th national percentile. Wildfire is the leading peril, rated Relatively High by FEMA at the 100th 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.
Lake County hazard ratings
| Peril | FEMA rating | National percentile | Peril score | Events per year |
|---|---|---|---|---|
| Wildfire | Relatively High | 100th | 5.0 of 5 | 0.02 |
| Riverine flooding | Relatively High | 99th | 5.0 of 5 | 0.50 |
| Earthquake | Relatively Moderate | 98th | 4.9 of 5 | 0.09 |
| Heat wave | Relatively Low | 10th | 1.4 of 5 | 6.7 |
| Tornado | Very Low | 8th | 1.3 of 5 | 0.10 |
| Lightning | Very Low | 5th | 1.2 of 5 | 5.4 |
| Winter weather | Relatively Low | 2nd | 1.1 of 5 | 8.8 |
| Strong wind | Very Low | 1st | 1.0 of 5 | <0.01 |
| Hail | Very Low | 0th | 1.0 of 5 | 0.04 |
Perils not assessed in Lake 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 |
| Ice storm | FEMA rating is "Not Applicable" for this county |
Model hail, wind and flood exposure for Lake 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.