Alliant Energy Neenah
Winnebago County, Wisconsin · EIA plant ID 55135 · Operator: Wisconsin Power & Light Co
Nameplate371MWSummer 401 MW
Generators2in service
Net generation483GWh12 mo to Dec 2025
Capacity factor14%gas/coal/oil units, summer MW
Heat rate11,275Btu/kWhfossil units, electric fuel, HHV
First online2000Runs as peaking
Monthly net generation
EIA-923, all units at the plant. Net of station use; storage can go negative.
FinalPreliminary
Capacity factor by year
Net MWh ÷ (summer MW × hours), gas/coal/oil units. Each year uses that year's EIA-860 ratings; the hollow dot is the latest 12 months.
Heat rate by year
Electric fuel MMBtu × 1000 ÷ net MWh (Btu/kWh, HHV), fossil units only; CT + CA counted as one combined-cycle block.
Annual data table
| Year | Net GWh | Capacity factor | Heat rate (Btu/kWh) |
|---|---|---|---|
| 2001 | 240 | 8.9% | 12,030 |
| 2002 | 298.6 | 11.0% | 11,978 |
| 2003 | 186.3 | 6.9% | 11,463 |
| 2004 | 55.8 | 2.1% | 11,993 |
| 2005 | 437.3 | 16.6% | 11,560 |
| 2006 | 115.7 | 4.4% | 12,148 |
| 2007 | 104 | 4.0% | 11,675 |
| 2008 | 25.8 | 1.0% | 12,873 |
| 2009 | 19.1 | 0.7% | 13,215 |
| 2010 | 14.1 | 0.5% | 11,263 |
| 2011 | 30.8 | 1.2% | 11,035 |
| 2012 | 103.2 | 3.9% | 11,873 |
| 2013 | 78.9 | 3.0% | 11,343 |
| 2014 | 50.8 | 1.9% | 11,484 |
| 2015 | 99.4 | 3.7% | 11,018 |
| 2016 | 275 | 10.5% | 10,770 |
| 2017 | 362.2 | 14.0% | 10,997 |
| 2018 | 236.3 | 9.0% | 10,525 |
| 2019 | 299.6 | 11.5% | 11,025 |
| 2020 | 412.9 | 15.9% | 10,934 |
| 2021 | 463.3 | 17.8% | — |
| 2022 | 500.2 | 18.8% | 13,336 |
| 2023 | 610.1 | 23.8% | 12,366 |
| 2024 | 739.9 | 28.3% | 11,297 |
| 2025 | 482.7 | 15.7% | 11,275 |
Generators
EIA-860 (annual) with EIA-860M updates through Sep 2026. EIA-923 reports generation by plant, prime mover and fuel, not by unit, so unit-level output isn't shown.
| Gen ID | Technology | Prime mover | Nameplate MW | Summer MW | Online | Status | Planned retirement | OEM / model |
|---|---|---|---|---|---|---|---|---|
| CT01 | Natural Gas Fired Combustion Turbine | GT | 185.5 | 201 | May 2000 | Operating | — | coming soon |
| CT02 | Natural Gas Fired Combustion Turbine | GT | 185.5 | 200.1 | May 2000 | Operating | — | coming soon |
Owner / operator
Operator: Wisconsin Power & Light Co. Ownership shares by in-service nameplate MW (EIA-860 Schedule 4; units not listed there are wholly owned by the operator).
| Wisconsin Power & Light Co | 100.0% | 371 MW |
Nearby plants
Within 80 km.
| Perch Solar WI, LLC | 6 MW | 9.4 km |
| Appleton | 2 MW | 10.2 km |
| Winnebago County Landfill Gas | 2 MW | 12.6 km |
| Kimberly Mill | 2 MW | 16.5 km |
| Outagamie County Co-Generation Facility | retired | 17.2 km |
| Kaukauna City Hydro | 5 MW | 17.4 km |