SALMON DIESEL
OperatingOil power plant
- Capacity
- 5 MW
- Primary fuel
- Oil
- County
- Lemhi County
- Operator
- IDAHO POWER CO
- Status
- Operating
- Commissioned
- 1967
- EIA plant ID
- 817
- Coordinates
- 45.1835, -113.8849
SALMON DIESEL, a 5 MW Oil power plant in Lemhi County, Idaho. Operated by IDAHO POWER CO, commissioned 1967.
Weather peril exposure
SALMON DIESEL is a 5 MW oil power plant in Lemhi County, ID, operated by IDAHO POWER CO, commissioned in 1967. Lemhi County carries moderate modeled catastrophe exposure in the FEMA National Risk Index, scoring 1.9 of 5 at the 21st national percentile. Riverine flooding is the leading peril, rated Relatively Low by FEMA at the 99th percentile.
The Bywatts loss layer is calibrated to solar PV hardware, so it is not applied to an oil plant. The ratings below are the FEMA National Risk Index county hazard ratings for this location.
Lemhi County hazard ratings
| Peril | FEMA rating | National percentile | Peril score | Events per year |
|---|---|---|---|---|
| Riverine flooding | Relatively Low | 99th | 4.9 of 5 | 0.64 |
| Wildfire | Relatively Moderate | 96th | 4.9 of 5 | <0.01 |
| Earthquake | Very Low | 80th | 4.2 of 5 | 0.02 |
| Lightning | Relatively Moderate | 35th | 2.4 of 5 | 31.1 |
| Ice storm | Very Low | 20th | 1.8 of 5 | 0.01 |
| Hail | Very Low | 17th | 1.7 of 5 | 0.14 |
| Heat wave | Very Low | 16th | 1.6 of 5 | 0.37 |
| Strong wind | Very Low | 13th | 1.5 of 5 | 0.20 |
| Winter weather | Very Low | 8th | 1.3 of 5 | 28.0 |
| Tornado | Very Low | 4th | 1.2 of 5 | 0.10 |
Perils not assessed in Lemhi 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 Lemhi 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.