WISSOTA
OperatingHydro power plant
- Capacity
- 36 MW
- Primary fuel
- Hydro
- County
- Chippewa County
- Operator
- NORTHERN STATES POWER CO - MINNESOTA
- Status
- Operating
- Commissioned
- 1917
- EIA plant ID
- 4015
- Coordinates
- 44.9381, -91.3407
WISSOTA, a 36 MW Hydro power plant in Chippewa County, Wisconsin. Operated by NORTHERN STATES POWER CO - MINNESOTA, commissioned 1917.
Weather peril exposure
WISSOTA is a 36 MW hydro power plant in Chippewa County, WI, operated by NORTHERN STATES POWER CO - MINNESOTA, commissioned in 1917. Chippewa County carries elevated modeled catastrophe exposure in the FEMA National Risk Index, scoring 3.3 of 5 at the 57th national percentile. Lightning is the leading peril, rated Relatively Moderate by FEMA at the 81st 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.
Chippewa County hazard ratings
| Peril | FEMA rating | National percentile | Peril score | Events per year |
|---|---|---|---|---|
| Lightning | Relatively Moderate | 81st | 4.3 of 5 | 33.4 |
| Strong wind | Relatively Moderate | 70th | 3.8 of 5 | 2.4 |
| Heat wave | Relatively Low | 69th | 3.8 of 5 | 2.4 |
| Hail | Relatively Moderate | 66th | 3.6 of 5 | 2.9 |
| Tornado | Relatively Moderate | 53rd | 3.1 of 5 | 0.39 |
| Riverine flooding | Relatively Low | 51st | 3.1 of 5 | 0.75 |
| Winter weather | Relatively Moderate | 45th | 2.8 of 5 | 16.7 |
| Wildfire | Very Low | 20th | 1.8 of 5 | <0.01 |
| Ice storm | Relatively Low | 11th | 1.4 of 5 | 0.41 |
| Earthquake | Very Low | 2nd | 1.1 of 5 | <0.01 |
Perils not assessed in Chippewa 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 "No Rating" for this county |
| Coastal flooding | FEMA rating is "Not Applicable" for this county |
Model hail, wind and flood exposure for Chippewa 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.