MADISON
OperatingHydro power plant
- Capacity
- 9 MW
- Primary fuel
- Hydro
- County
- Madison County
- Operator
- PPL MONTANA LLC
- Status
- Operating
- Commissioned
- 2021
- EIA plant ID
- 6422
- Coordinates
- 45.4879, -111.6338
MADISON, a 9 MW Hydro power plant in Madison County, Montana. Operated by PPL MONTANA LLC, commissioned 2021.
Weather peril exposure
MADISON is a 9 MW hydro power plant in Madison County, MT, operated by PPL MONTANA LLC, commissioned in 2021. Madison County carries moderate modeled catastrophe exposure in the FEMA National Risk Index, scoring 2.5 of 5 at the 37th national percentile. Earthquake is the leading peril, rated Relatively Low by FEMA at the 92nd 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.
Madison County hazard ratings
| Peril | FEMA rating | National percentile | Peril score | Events per year |
|---|---|---|---|---|
| Earthquake | Relatively Low | 92nd | 4.7 of 5 | 0.03 |
| Wildfire | Relatively Low | 87th | 4.5 of 5 | <0.01 |
| Riverine flooding | Very Low | 66th | 3.6 of 5 | 0.32 |
| Hail | Very Low | 50th | 3.0 of 5 | 0.38 |
| Winter weather | Relatively Low | 22nd | 1.9 of 5 | 42.1 |
| Ice storm | Very Low | 20th | 1.8 of 5 | 0.01 |
| Heat wave | Very Low | 12th | 1.5 of 5 | 0.16 |
| Tornado | Very Low | 6th | 1.3 of 5 | 0.09 |
| Lightning | Relatively Low | 6th | 1.2 of 5 | 37.7 |
| Strong wind | Very Low | 4th | 1.2 of 5 | 0.34 |
Perils not assessed in Madison 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 Madison 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.