KERR
OperatingHydro power plant
- Capacity
- 208 MW
- Primary fuel
- Hydro
- County
- Lake County
- Operator
- PPL MONTANA LLC
- Status
- Operating
- Commissioned
- 1938
- EIA plant ID
- 2188
- Generators
- 3
- Technology
- Conventional Hydroelectric
- Net generation (2024)
- 970 GWh
- Capacity factor (2024, EIA nameplate)
- 48%
- Data vintage
- EIA-860 2024 final; EIA-923 2022-2024 final
- Coordinates
- 47.6779, -114.2377
KERR, a 208 MW Hydro power plant in Lake County, Montana. Operated by PPL MONTANA LLC, commissioned 1938.
How KERR compares
With 208 MW of capacity, KERR ranks 6th among the 48 operating power plants Bywatts maps in Montana and 5th of the 21 operating Hydro plants in the state. It accounts for about 8.0% of Montana's operating Hydro capacity and 3.3% of all operating capacity in the state. Nationally it is the 85th-largest of the 1,243 operating Hydro plants in the database. Commissioned in 1938, it is older than 80% of the 46 operating Montana plants with a recorded commissioning year. Its operator, PPL MONTANA LLC, runs 12 operating plants in Montana totaling 2,868 MW.
EIA-860 lists 3 generators at the site with 228 MW of nameplate capacity, all conventional hydroelectric technology. Net generation was 970 GWh in 2024 (a 48% capacity factor), down 3% from 2022. Its generators came online between 1938 and 1954.
Grid neighborhood
The nearest named substation is KERR (115 kV), about 0.3 miles away; the closest transmission line found within 10 miles is a 161 kV line owned by NORTHWESTERN ENERGY LLC - (MT), 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
KERR is a 208 MW hydro power plant in Lake County, MT, operated by PPL MONTANA LLC, commissioned in 1938. Lake County carries low modeled catastrophe exposure in the FEMA National Risk Index, scoring 1.4 of 5 at the 11th national percentile. Earthquake is the leading peril, rated Relatively Moderate by FEMA at the 95th 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.
Lake County hazard ratings
| Peril | FEMA rating | National percentile | Peril score | Events per year |
|---|---|---|---|---|
| Earthquake | Relatively Moderate | 95th | 4.8 of 5 | 0.03 |
| Wildfire | Relatively Moderate | 93rd | 4.7 of 5 | <0.01 |
| Ice storm | Relatively Moderate | 77th | 4.1 of 5 | 0.10 |
| Winter weather | Relatively High | 62nd | 3.5 of 5 | 43.8 |
| Riverine flooding | Relatively Low | 59th | 3.4 of 5 | 0.43 |
| Heat wave | Very Low | 44th | 2.8 of 5 | 1.4 |
| Lightning | Relatively Low | 22nd | 1.9 of 5 | 20.5 |
| Hail | Very Low | 16th | 1.6 of 5 | 0.39 |
| Strong wind | Very Low | 15th | 1.6 of 5 | 0.24 |
| Tornado | Very Low | 1st | 1.1 of 5 | 0.03 |
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 |
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.