THOMSON
OperatingHydro power plant
- Capacity
- 73 MW
- Primary fuel
- Hydro
- County
- Carlton County
- Operator
- MINNESOTA POWER INC
- Status
- Operating
- Commissioned
- 1907
- EIA plant ID
- 1901
- Coordinates
- 46.6548, -92.3334
THOMSON, a 73 MW Hydro power plant in Carlton County, Minnesota. Operated by MINNESOTA POWER INC, commissioned 1907.
Weather peril exposure
THOMSON is a 73 MW hydro power plant in Carlton County, MN, operated by MINNESOTA POWER INC, commissioned in 1907. Carlton County carries moderate modeled catastrophe exposure in the FEMA National Risk Index, scoring 2.5 of 5 at the 38th national percentile. Lightning is the leading peril, rated Relatively Moderate 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.
Carlton County hazard ratings
| Peril | FEMA rating | National percentile | Peril score | Events per year |
|---|---|---|---|---|
| Lightning | Relatively Moderate | 92nd | 4.7 of 5 | 29.7 |
| Riverine flooding | Relatively Low | 81st | 4.2 of 5 | 0.64 |
| Heat wave | Relatively Low | 75th | 4.0 of 5 | 0.95 |
| Ice storm | Relatively Low | 59th | 3.3 of 5 | 0.50 |
| Hail | Relatively Low | 53rd | 3.1 of 5 | 2.0 |
| Winter weather | Relatively Low | 52nd | 3.1 of 5 | 23.8 |
| Wildfire | Very Low | 36th | 2.4 of 5 | <0.01 |
| Tornado | Relatively Low | 26th | 2.0 of 5 | 0.12 |
| Strong wind | Relatively Low | 9th | 1.3 of 5 | 1.4 |
| Earthquake | Very Low | 0th | 1.0 of 5 | <0.01 |
Perils not assessed in Carlton 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 Carlton 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.