SAINT MARYS FALLS
OperatingHydro power plant
- Capacity
- 24 MW
- Primary fuel
- Hydro
- County
- Chippewa County
- Operator
- USACE-DETROIT DISTRICT
- Status
- Operating
- Commissioned
- 1932
- EIA plant ID
- 1865
- Coordinates
- 46.5062, -84.3492
SAINT MARYS FALLS, a 24 MW Hydro power plant in Chippewa County, Michigan. Operated by USACE-DETROIT DISTRICT, commissioned 1932.
Weather peril exposure
SAINT MARYS FALLS is a 24 MW hydro power plant in Chippewa County, MI, operated by USACE-DETROIT DISTRICT, commissioned in 1932. Chippewa County carries low modeled catastrophe exposure in the FEMA National Risk Index, scoring 1.0 of 5 at the 1st national percentile. Wildfire is the leading peril, rated Relatively Low by FEMA at the 59th 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 |
|---|---|---|---|---|
| Wildfire | Relatively Low | 59th | 3.3 of 5 | <0.01 |
| Heat wave | Very Low | 48th | 2.9 of 5 | 0.11 |
| Coastal flooding | Relatively Low | 34th | 2.4 of 5 | 0.02 |
| Winter weather | Relatively Low | 32nd | 2.3 of 5 | 32.4 |
| Hail | Very Low | 16th | 1.7 of 5 | 0.18 |
| Lightning | Relatively Low | 15th | 1.6 of 5 | 21.1 |
| Riverine flooding | Relatively Low | 11th | 1.5 of 5 | 0.21 |
| Hurricane | Very Low | 11th | 1.4 of 5 | <0.01 |
| Ice storm | Very Low | 7th | 1.3 of 5 | 0.02 |
| Strong wind | Very Low | 5th | 1.2 of 5 | 0.19 |
| Tornado | Very Low | 5th | 1.2 of 5 | 0.06 |
| Earthquake | Very Low | 4th | 1.2 of 5 | <0.01 |
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.