FERMI II
OperatingNuclear power plant
- Capacity
- 1,281 MW
- Primary fuel
- Nuclear
- County
- Monroe County
- Operator
- THE DTE ELECTRIC COMPANY
- Status
- Operating
- Commissioned
- 1966
- EIA plant ID
- 1729
- Generators
- 5
- Technology
- Nuclear
- Net generation (2024)
- 8,256 GWh
- Capacity factor (2024, EIA nameplate)
- 73%
- Data vintage
- EIA-860 2024 final; EIA-923 2022-2024 final
- Coordinates
- 41.9631, -83.2575
FERMI II, a 1,281 MW Nuclear power plant in Monroe County, Michigan. Operated by THE DTE ELECTRIC COMPANY, commissioned 1966.
How FERMI II compares
With 1,281 MW of capacity, FERMI II ranks 8th among the 171 operating power plants Bywatts maps in Michigan and 2nd of the 3 operating Nuclear plants in the state. It accounts for about 29% of Michigan's operating Nuclear capacity and 4.8% of all operating capacity in the state. Nationally it is the 36th-largest of the 55 operating Nuclear plants in the database. Commissioned in 1966, it is older than 63% of the 168 operating Michigan plants with a recorded commissioning year. Its operator, THE DTE ELECTRIC COMPANY, runs 17 operating plants in Michigan totaling 8,054 MW. It shares Monroe County with one other operating plant, MONROE.
EIA-860 lists 5 generators at the site with 1,281 MW of nameplate capacity, mainly nuclear technology. Net generation was 8,256 GWh in 2024 (a 73% capacity factor), up 24% from 2022. Its generators came online between 1966 and 1988.
Grid neighborhood
The nearest named substation is BROWNSTOWN (345 kV), about 10.6 miles away; the closest transmission line found within 10 miles is a 345 kV line, under 0.1 miles away. Another 12 operating power plants totaling 4,820 MW sit within 25 miles; the largest is MONROE (3,293 MW, Coal).
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
FERMI II is a 1,281 MW nuclear power plant in Monroe County, MI, operated by THE DTE ELECTRIC COMPANY, commissioned in 1966. Monroe County carries elevated modeled catastrophe exposure in the FEMA National Risk Index, scoring 3.0 of 5 at the 49th national percentile. Heat wave is the leading peril, rated Relatively Low by FEMA at the 83rd percentile.
The Bywatts loss layer is calibrated to solar PV hardware, so it is not applied to a nuclear plant. The ratings below are the FEMA National Risk Index county hazard ratings for this location.
Monroe County hazard ratings
| Peril | FEMA rating | National percentile | Peril score | Events per year |
|---|---|---|---|---|
| Heat wave | Relatively Low | 83rd | 4.3 of 5 | 3.8 |
| Ice storm | Relatively High | 72nd | 3.9 of 5 | 1.5 |
| Strong wind | Relatively High | 72nd | 3.9 of 5 | 5.0 |
| Winter weather | Relatively Moderate | 63rd | 3.5 of 5 | 8.9 |
| Tornado | Relatively Moderate | 61st | 3.5 of 5 | 0.31 |
| Hail | Relatively Moderate | 58th | 3.3 of 5 | 3.1 |
| Riverine flooding | Relatively Moderate | 56th | 3.2 of 5 | 1.3 |
| Earthquake | Relatively Low | 47th | 2.9 of 5 | <0.01 |
| Lightning | Relatively Low | 26th | 2.0 of 5 | 38.1 |
| Hurricane | Very Low | 23rd | 1.9 of 5 | <0.01 |
| Coastal flooding | Relatively Low | 21st | 1.9 of 5 | 0.01 |
| Wildfire | Very Low | 10th | 1.4 of 5 | <0.01 |
Model hail, wind and flood exposure for Monroe 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.