Fox Energy Center
Outagamie County, Wisconsin · EIA plant ID 56031 · Operator: Wisconsin Public Service Corp
Nameplate619MWSummer 578 MW
Generators3in service
Net generation4,139GWh12 mo to Aug 2026
Capacity factor82%gas/coal/oil units, summer MW
Heat rate7,046Btu/kWhfossil units, electric fuel, HHV
First online2005Runs as baseload
The 12-month figures include preliminary EIA-923 months, which EIA revises. Final data runs through Dec 2025.
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) |
|---|---|---|---|
| 2005 | 313.8 | 14.4% | 9,043 |
| 2006 | 918.4 | 19.9% | 7,304 |
| 2007 | 449 | 8.5% | 7,339 |
| 2008 | 638.2 | 13.3% | 7,694 |
| 2009 | 660.6 | 13.8% | 7,254 |
| 2010 | 607 | 12.6% | 7,285 |
| 2011 | 1,580.9 | 32.9% | 7,164 |
| 2012 | 2,924.9 | 61.0% | 6,998 |
| 2013 | 1,752.2 | 35.4% | 7,226 |
| 2014 | 1,579 | 31.9% | 7,122 |
| 2015 | 3,522.9 | 72.6% | 7,002 |
| 2016 | 3,556.8 | 72.7% | 6,992 |
| 2017 | 3,116.5 | 62.3% | 6,898 |
| 2018 | 3,644.9 | 71.9% | 6,932 |
| 2019 | 4,311.1 | 86.6% | 6,891 |
| 2020 | 4,474.7 | 88.7% | 6,982 |
| 2021 | 4,165.5 | 82.8% | 6,929 |
| 2022 | 4,258.4 | 84.2% | 6,904 |
| 2023 | 4,346.9 | 85.9% | 6,916 |
| 2024 | 4,455.8 | 87.8% | 6,922 |
| 2025 | 3,572.2 | 70.6% | 7,042 |
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 |
|---|---|---|---|---|---|---|---|---|
| CTG1 | Natural Gas Fired Combined Cycle | CT | 198.9 | 170.8 | Jun 2006 | Operating | — | coming soon |
| CTG2 | Natural Gas Fired Combined Cycle | CT | 198.9 | 162.8 | Jun 2005 | Operating | — | coming soon |
| STG | Natural Gas Fired Combined Cycle | CA | 221 | 243.9 | Jun 2005 | Operating | — | coming soon |
Owner / operator
Operator: Wisconsin Public Service Corp. Ownership shares by in-service nameplate MW (EIA-860 Schedule 4; units not listed there are wholly owned by the operator).
| Wisconsin Public Service Corp | 100.0% | 619 MW |
Nearby plants
Within 80 km.
| Kaukauna Paper Mill | 45 MW | 5.5 km |
| Little Chute | 3 MW | 5.8 km |
| Kaukauna Gas Turbine | 18 MW | 6.7 km |
| Island Street Peaking Plant | 61 MW | 6.7 km |
| New Badger | 8 MW | 6.7 km |
| Rapide Croche | 2 MW | 8.4 km |