FORT PECK
OperatingHydro power plant
- Capacity
- 185 MW
- Primary fuel
- Hydro
- County
- McCone County
- Operator
- USCE-MISSOURI RIVER DISTRICT
- Status
- Operating
- Commissioned
- 1943
- EIA plant ID
- 6623
- Generators
- 5
- Technology
- Conventional Hydroelectric
- Net generation (2024)
- 752 GWh
- Capacity factor (2024, EIA nameplate)
- 48%
- Data vintage
- EIA-860 2024 final; EIA-923 2022-2024 final
- Coordinates
- 48.0126, -106.4114
FORT PECK, a 185 MW Hydro power plant in McCone County, Montana. Operated by USCE-MISSOURI RIVER DISTRICT, commissioned 1943.
How FORT PECK compares
With 185 MW of capacity, FORT PECK ranks 8th among the 48 operating power plants Bywatts maps in Montana and 6th of the 21 operating Hydro plants in the state. It accounts for about 7.2% of Montana's operating Hydro capacity and 3.0% of all operating capacity in the state. Nationally it is the 95th-largest of the 1,243 operating Hydro plants in the database. Commissioned in 1943, it is older than 78% of the 46 operating Montana plants with a recorded commissioning year.
EIA-860 lists 5 generators at the site with 180 MW of nameplate capacity, all conventional hydroelectric technology. Net generation was 752 GWh in 2024 (a 48% capacity factor), down 1% from 2022. Its generators came online between 1943 and 1961.
Grid neighborhood
The nearest named substation is FORT PECK (230 kV), about 0.1 miles away; the closest transmission line found within 10 miles is a 230 kV line owned by WAPA-- WESTERN AREA POWER ADMINISTRATION, under 0.1 miles away.
Computed by Bywatts from HIFLD power plant, substation and transmission line records and EIA-860/923 survey data; distances are straight-line. Sources and methodology
Weather peril exposure
FORT PECK is a 185 MW hydro power plant in McCone County, MT, operated by USCE-MISSOURI RIVER DISTRICT, commissioned in 1943. McCone County carries elevated modeled catastrophe exposure in the FEMA National Risk Index, scoring 2.7 of 5 at the 42nd national percentile. Heat wave is the leading peril, rated Very Low by FEMA at the 94th percentile.
The Bywatts loss layer is calibrated to solar PV hardware, so it is not applied to a hydro plant. The ratings below are the FEMA National Risk Index county hazard ratings for this location.
McCone County hazard ratings
| Peril | FEMA rating | National percentile | Peril score | Events per year |
|---|---|---|---|---|
| Heat wave | Very Low | 94th | 4.7 of 5 | 2.7 |
| Strong wind | Relatively Low | 92nd | 4.7 of 5 | 1.7 |
| Wildfire | Very Low | 77th | 4.1 of 5 | <0.01 |
| Winter weather | Relatively Low | 54th | 3.2 of 5 | 19.3 |
| Hail | Relatively Low | 53rd | 3.1 of 5 | 1.9 |
| Tornado | Very Low | 28th | 2.1 of 5 | 0.28 |
| Lightning | Very Low | 20th | 1.8 of 5 | 26.7 |
| Earthquake | Very Low | 19th | 1.8 of 5 | <0.01 |
| Ice storm | Very Low | 18th | 1.7 of 5 | 0.01 |
| Riverine flooding | Very Low | 10th | 1.4 of 5 | 0.79 |
Perils not assessed in McCone 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 McCone 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.