ALLIANT ENERGY NEENAH
OperatingNatural Gas power plant
- Capacity
- 371 MW
- Primary fuel
- Natural Gas
- County
- Winnebago County
- Operator
- WISCONSIN POWER & LIGHT CO
- Status
- Operating
- Commissioned
- 2000
- EIA plant ID
- 55135
- Generators
- 2
- Technology
- Natural Gas Fired Combustion Turbine
- Net generation (2024)
- 740 GWh
- Capacity factor (2024, EIA nameplate)
- 23%
- Data vintage
- EIA-860 2024 final; EIA-923 2022-2024 final
- Coordinates
- 44.1936, -88.5064
ALLIANT ENERGY NEENAH, a 371 MW Natural Gas power plant in Winnebago County, Wisconsin. Operated by WISCONSIN POWER & LIGHT CO, commissioned 2000.
How ALLIANT ENERGY NEENAH compares
With 371 MW of capacity, ALLIANT ENERGY NEENAH ranks 15th among the 141 operating power plants Bywatts maps in Wisconsin and 8th of the 26 operating Natural Gas plants in the state. It accounts for about 5.7% of Wisconsin's operating Natural Gas capacity and 2.3% of all operating capacity in the state. Nationally it is the 400th-largest of the 1,185 operating Natural Gas plants in the database. Commissioned in 2000, it is newer than 73% of the 141 operating Wisconsin plants with a recorded commissioning year. Its operator, WISCONSIN POWER & LIGHT CO, runs 8 operating plants in Wisconsin totaling 3,001 MW. It shares Winnebago County with one other operating plant, WINNEBAGO COUNTY LANDFILL GAS.
EIA-860 lists 2 generators at the site with 371 MW of nameplate capacity, all natural gas fired combustion turbine technology. Net generation was 740 GWh in 2024 (a 23% capacity factor), up 48% from 2022.
Grid neighborhood
The nearest named substation is NEEVIN (138 kV), about 0.1 miles away; the closest transmission line found within 10 miles is a 138 kV line, under 0.1 miles away. Another 12 operating power plants totaling 962 MW sit within 25 miles; the largest is FOX ENERGY CENTER (620 MW, Natural Gas).
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
ALLIANT ENERGY NEENAH is a 371 MW natural gas power plant in Winnebago County, WI, operated by WISCONSIN POWER & LIGHT CO, commissioned in 2000. Winnebago County carries high modeled catastrophe exposure in the FEMA National Risk Index, scoring 3.6 of 5 at the 65th national percentile. Hail is the leading peril, rated Relatively Moderate by FEMA at the 72nd percentile.
The Bywatts loss layer is calibrated to solar PV hardware, so it is not applied to a natural gas 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 Moderate | 72nd | 3.9 of 5 | 2.8 |
| Riverine flooding | Relatively Moderate | 66th | 3.6 of 5 | 0.57 |
| Lightning | Relatively High | 55th | 3.2 of 5 | 34.2 |
| Tornado | Relatively High | 50th | 3.0 of 5 | 0.34 |
| Strong wind | Relatively High | 43rd | 2.7 of 5 | 3.0 |
| Heat wave | Relatively Low | 37th | 2.5 of 5 | 1.6 |
| Wildfire | Very Low | 36th | 2.4 of 5 | <0.01 |
| Winter weather | Relatively Moderate | 10th | 1.4 of 5 | 15.6 |
| Earthquake | Very Low | 9th | 1.4 of 5 | <0.01 |
| Ice storm | Relatively Low | 4th | 1.2 of 5 | 0.27 |
| Hurricane | Very Low | 3rd | 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.