ROCKTON
OperatingHydro power plant
- Capacity
- 1 MW
- Primary fuel
- Hydro
- County
- Winnebago County
- Operator
- MIDWEST HYDRO LLC
- Status
- Operating
- Commissioned
- 1929
- EIA plant ID
- 903
- Coordinates
- 42.4511, -89.0756
ROCKTON, a 1 MW Hydro power plant in Winnebago County, Illinois. Operated by MIDWEST HYDRO LLC, commissioned 1929.
Weather peril exposure
ROCKTON is a 1 MW hydro power plant in Winnebago County, IL, operated by MIDWEST HYDRO LLC, commissioned in 1929. Winnebago County carries high modeled catastrophe exposure in the FEMA National Risk Index, scoring 3.7 of 5 at the 68th national percentile. Hail is the leading peril, rated Relatively High by FEMA at the 74th 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.
Winnebago County hazard ratings
| Peril | FEMA rating | National percentile | Peril score | Events per year |
|---|---|---|---|---|
| Hail | Relatively High | 74th | 4.0 of 5 | 4.5 |
| Riverine flooding | Relatively High | 67th | 3.7 of 5 | 2.1 |
| Tornado | Relatively High | 61st | 3.4 of 5 | 0.44 |
| Strong wind | Relatively High | 56th | 3.2 of 5 | 6.1 |
| Lightning | Relatively High | 55th | 3.2 of 5 | 40.0 |
| Heat wave | Relatively Moderate | 51st | 3.0 of 5 | 3.3 |
| Ice storm | Relatively High | 46th | 2.8 of 5 | 0.72 |
| Earthquake | Relatively Low | 39th | 2.6 of 5 | <0.01 |
| Wildfire | Very Low | 21st | 1.8 of 5 | <0.01 |
| Winter weather | Relatively Moderate | 2nd | 1.1 of 5 | 14.7 |
| Hurricane | Very Low | 2nd | 1.1 of 5 | <0.01 |
Perils not assessed in Winnebago 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 Winnebago 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.