DRESDEN GENERATING STATION
OperatingNuclear power plant
- Capacity
- 2,019 MW
- Primary fuel
- Nuclear
- County
- Grundy County
- Operator
- EXELON NUCLEAR
- Status
- Operating
- Commissioned
- 1970
- EIA plant ID
- 869
- Generators
- 2
- Technology
- Nuclear
- Net generation (2024)
- 15,252 GWh
- Capacity factor (2024, EIA nameplate)
- 86%
- Data vintage
- EIA-860 2024 final; EIA-923 2022-2024 final
- Coordinates
- 41.3900, -88.2700
DRESDEN GENERATING STATION, a 2,019 MW Nuclear power plant in Grundy County, Illinois. Operated by EXELON NUCLEAR, commissioned 1970.
How DRESDEN GENERATING STATION compares
With 2,019 MW of capacity, DRESDEN GENERATING STATION ranks 4th among the 158 operating power plants Bywatts maps in Illinois and 4th of the 6 operating Nuclear plants in the state. It accounts for about 16% of Illinois's operating Nuclear capacity and 4.9% of all operating capacity in the state. Nationally it is the 21st-largest of the 55 operating Nuclear plants in the database. Commissioned in 1970, it is older than 82% of the 150 operating Illinois plants with a recorded commissioning year. Its operator, EXELON NUCLEAR, runs 6 operating plants in Illinois totaling 12,415 MW. It shares Grundy County with one other operating plant, MORRIS COGENERATION LLC.
EIA-860 lists 2 generators at the site with 2,019 MW of nameplate capacity, all nuclear technology. Net generation was 15,252 GWh in 2024 (an 86% capacity factor), down 1% from 2022. Its generators came online between 1970 and 1971.
Grid neighborhood
The nearest named substation is COLLINS (765 kV), about 4.8 miles away; the closest transmission line found within 10 miles is a 345 kV line owned by COMMONWEALTH EDISON CO, under 0.1 miles away. Another 11 operating power plants totaling 9,212 MW sit within 25 miles; the largest is BRAIDWOOD GENERATION STATION (2,450 MW, Nuclear). Within 50 miles are 9 mapped data centers; the nearest is CyrusOne Chicago (Lombard) in Lombard, about 34.1 miles away.
Computed by Bywatts from HIFLD power plant, substation and transmission line records, EIA-860/923 survey data and PeeringDB data center locations; distances are straight-line. Sources and methodology
Weather peril exposure
DRESDEN GENERATING STATION is a 2,019 MW nuclear power plant in Grundy County, IL, operated by EXELON NUCLEAR, commissioned in 1970. Grundy County carries low modeled catastrophe exposure in the FEMA National Risk Index, scoring 1.7 of 5 at the 18th national percentile. Riverine flooding is the leading peril, rated Relatively Low by FEMA at the 86th 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.
Grundy County hazard ratings
| Peril | FEMA rating | National percentile | Peril score | Events per year |
|---|---|---|---|---|
| Riverine flooding | Relatively Low | 86th | 4.4 of 5 | 1.3 |
| Heat wave | Relatively Low | 85th | 4.4 of 5 | 4.3 |
| Strong wind | Relatively Moderate | 80th | 4.2 of 5 | 6.0 |
| Tornado | Relatively Moderate | 70th | 3.8 of 5 | 0.39 |
| Earthquake | Very Low | 60th | 3.4 of 5 | <0.01 |
| Wildfire | Very Low | 36th | 2.4 of 5 | <0.01 |
| Ice storm | Very Low | 27th | 2.1 of 5 | 0.82 |
| Lightning | Very Low | 26th | 2.0 of 5 | 44.2 |
| Winter weather | Relatively Low | 21st | 1.8 of 5 | 14.1 |
| Hail | Very Low | 20th | 1.8 of 5 | 4.1 |
| Hurricane | Very Low | 1st | 1.0 of 5 | <0.01 |
Perils not assessed in Grundy 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 |
|---|---|
| Coastal flooding | FEMA rating is "Not Applicable" for this county |
Model hail, wind and flood exposure for Grundy 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.