HENNEPIN POWER STATION
Retired 2019Coal power plant
- Capacity
- 306 MW
- Primary fuel
- Coal
- County
- Putnam County
- Operator
- DYNEGY MIDWEST GENERATION INC
- EIA plant ID
- 892
- Coordinates
- 41.3028, -89.3151
HENNEPIN POWER STATION, a retired 306 MW Coal power plant in Putnam County, Illinois. It was retired in 2019, according to EIA-860.
How HENNEPIN POWER STATION compares
It was retired in 2019 according to EIA-860, so it is not counted in Illinois's operating fleet.
Grid neighborhood
The closest transmission line found within 10 miles is a 138 kV line, under 0.1 miles away. Another 7 operating power plants totaling 598 MW sit within 25 miles; the largest is BIG SKY WIND LLC (240 MW, Wind).
Computed by Bywatts from HIFLD power plant and transmission line records and EIA-860 retirement records; distances are straight-line. Sources and methodology
Weather peril exposure
HENNEPIN POWER STATION is a retired 306 MW coal power plant in Putnam County, IL, formerly operated by DYNEGY MIDWEST GENERATION INC. Putnam County carries moderate modeled catastrophe exposure in the FEMA National Risk Index, scoring 2.4 of 5 at the 35th national percentile. Strong wind is the leading peril, rated Relatively Low by FEMA at the 91st percentile.
The Bywatts loss layer is calibrated to solar PV hardware, so it is not applied to a coal plant. The ratings below are the FEMA National Risk Index county hazard ratings for this location.
Putnam County hazard ratings
| Peril | FEMA rating | National percentile | Peril score | Events per year |
|---|---|---|---|---|
| Strong wind | Relatively Low | 91st | 4.6 of 5 | 5.4 |
| Tornado | Relatively Low | 68th | 3.7 of 5 | 0.17 |
| Earthquake | Very Low | 58th | 3.3 of 5 | <0.01 |
| Lightning | Very Low | 43rd | 2.7 of 5 | 44.0 |
| Hail | Very Low | 42nd | 2.7 of 5 | 3.7 |
| Riverine flooding | Very Low | 41st | 2.6 of 5 | 0.43 |
| Ice storm | Very Low | 39th | 2.6 of 5 | 0.70 |
| Winter weather | Very Low | 29th | 2.2 of 5 | 14.8 |
| Heat wave | Very Low | 22nd | 1.9 of 5 | 6.5 |
| Wildfire | Very Low | 16th | 1.6 of 5 | <0.01 |
| Hurricane | Very Low | 8th | 1.3 of 5 | 0.01 |
Perils not assessed in Putnam 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 Putnam 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.