BENNETT MOUNTAIN
OperatingNatural Gas power plant
- Capacity
- 173 MW
- Primary fuel
- Natural Gas
- County
- Elmore County
- Operator
- IDAHO POWER CO
- Status
- Operating
- Commissioned
- 2005
- EIA plant ID
- 55733
- Generators
- 1
- Technology
- Natural Gas Fired Combustion Turbine
- Net generation (2024)
- 919 GWh
- Capacity factor (2024, EIA nameplate)
- 61%
- Data vintage
- EIA-860 2024 final; EIA-923 2022-2024 final
- Coordinates
- 43.1472, -115.6666
BENNETT MOUNTAIN, a 173 MW Natural Gas power plant in Elmore County, Idaho. Operated by IDAHO POWER CO, commissioned 2005.
How BENNETT MOUNTAIN compares
With 173 MW of capacity, BENNETT MOUNTAIN ranks 8th among the 123 operating power plants Bywatts maps in Idaho and 3rd of the 4 operating Natural Gas plants in the state. It accounts for about 19% of Idaho's operating Natural Gas capacity and 3.5% of all operating capacity in the state. Nationally it is the 570th-largest of the 1,185 operating Natural Gas plants in the database. Commissioned in 2005, it is newer than 64% of the 121 operating Idaho plants with a recorded commissioning year. Its operator, IDAHO POWER CO, runs 20 operating plants in Idaho totaling 1,894 MW. It shares Elmore County with 14 other operating plants, including EVANDER ANDREWS POWER COMPLEX and ANDERSON RANCH.
EIA-860 lists 1 generator at the site with 173 MW of nameplate capacity, all natural gas fired combustion turbine technology. Net generation was 919 GWh in 2024 (a 61% capacity factor), about 4 times its 2022 output.
Grid neighborhood
The nearest named substation is MOUNTAIN HOME (138 kV), about 2.9 miles away; the closest transmission line found within 10 miles is a 230 kV line owned by IDAHO POWER CO, under 0.1 miles away. Another 12 operating power plants totaling 598 MW sit within 25 miles; the largest is EVANDER ANDREWS POWER COMPLEX (273 MW, Natural Gas). Within 50 miles is one mapped data center, Syringa Networks Boise in Boise, about 39.8 miles away.
Computed by Bywatts from HIFLD power plant, substation and transmission line records, EIA-860/923 survey data and PeeringDB data center locations; distances are straight-line. Sources and methodology
Weather peril exposure
BENNETT MOUNTAIN is a 173 MW natural gas power plant in Elmore County, ID, operated by IDAHO POWER CO, commissioned in 2005. Elmore County carries elevated modeled catastrophe exposure in the FEMA National Risk Index, scoring 2.8 of 5 at the 45th 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 natural gas plant. The ratings below are the FEMA National Risk Index county hazard ratings for this location.
Elmore County hazard ratings
| Peril | FEMA rating | National percentile | Peril score | Events per year |
|---|---|---|---|---|
| Wildfire | Relatively High | 100th | 5.0 of 5 | 0.03 |
| Heat wave | Relatively Low | 61st | 3.4 of 5 | 2.6 |
| Earthquake | Very Low | 56th | 3.3 of 5 | <0.01 |
| Riverine flooding | Very Low | 50th | 3.0 of 5 | 0.71 |
| Hail | Very Low | 24th | 2.0 of 5 | 0.21 |
| Lightning | Very Low | 13th | 1.5 of 5 | 21.7 |
| Strong wind | Relatively Low | 10th | 1.4 of 5 | 0.32 |
| Tornado | Very Low | 9th | 1.4 of 5 | 0.19 |
| Ice storm | Relatively Low | 8th | 1.3 of 5 | 0.08 |
| Winter weather | Relatively Moderate | 6th | 1.2 of 5 | 13.4 |
Perils not assessed in Elmore 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 Elmore 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.