Weston
Marathon County, Wisconsin · EIA plant ID 4078 · Operator: Wisconsin Public Service Corp
×158 MW natural gas retired since 2020 (latest Jun 2023)
Nameplate946MWSummer 888 MW
Generators2in service
Net generation4,013GWh12 mo to Aug 2026
Capacity factor52%gas/coal/oil units, summer MW
Heat rate10,046Btu/kWhfossil units, electric fuel, HHV
First online1981Runs 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) |
|---|---|---|---|
| 2001 | 3,169.3 | — | — |
| 2002 | 3,202.6 | — | — |
| 2003 | 3,374.1 | 69.7% | 10,626 |
| 2004 | 3,461.2 | 71.1% | 10,629 |
| 2005 | 3,568.2 | 74.2% | 10,663 |
| 2006 | 3,415.5 | 70.2% | 10,691 |
| 2007 | 2,752 | 57.9% | 11,051 |
| 2008 | 4,463.8 | 62.7% | 10,264 |
| 2009 | 6,080.7 | 64.5% | 9,661 |
| 2010 | 6,805.3 | 71.6% | 9,874 |
| 2011 | 6,031.7 | 63.9% | 9,978 |
| 2012 | 4,969.6 | 53.0% | 9,770 |
| 2013 | 6,086.1 | 66.0% | 9,990 |
| 2014 | 5,013.5 | 54.4% | 10,019 |
| 2015 | 4,413.6 | 49.8% | 9,793 |
| 2016 | 3,805.8 | 43.4% | 9,872 |
| 2017 | 4,299.4 | 48.5% | 9,617 |
| 2018 | 4,621.1 | 53.3% | 9,591 |
| 2019 | 4,409 | 50.9% | 9,588 |
| 2020 | 4,097.3 | 45.4% | 9,688 |
| 2021 | 4,766.8 | 53.0% | 9,749 |
| 2022 | 4,382.1 | 48.7% | 9,809 |
| 2023 | 3,431.2 | 42.9% | 9,627 |
| 2024 | 3,981.2 | 51.0% | 9,819 |
| 2025 | 4,842.4 | 62.3% | 9,841 |
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 |
|---|---|---|---|---|---|---|---|---|
| 3 | Conventional Steam Coal | ST | 350.5 | 334.7 | Dec 1981 | Operating | — | coming soon |
| 4 | Conventional Steam Coal | ST | 595 | 553.2 | Jul 2008 | Operating | — | coming soon |
| 1 | Conventional Steam Coal | ST | 60 | 50.7 | Dec 1954 | Retired Jun 2015 | — | coming soon |
| 2 | Natural Gas Steam Turbine | ST | 81.6 | 75.4 | Sep 1960 | Retired Jan 2023 | — | coming soon |
| 31 | Natural Gas Fired Combustion Turbine | GT | 19.6 | 16.1 | Mar 1969 | Retired Jun 2023 | — | coming soon |
| 32 | Natural Gas Fired Combustion Turbine | GT | 56.7 | 46.5 | Jun 1973 | Retired Jun 2023 | — | 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 | 81.1% | 767 MW |
| Dairyland Power Coop | 18.9% | 179 MW |
Nearby plants
Within 80 km.
| Weston RICE | 132 MW | 0.5 km |
| Rothschild Biomass Cogen Facility | 58 MW | 3.6 km |
| Domtar Paper Company Rothschild | 1 MW | 3.7 km |
| Mosinee Mill | 23 MW | 8.6 km |
| Wausau | 5 MW | 10.9 km |
| Fiber Recovery, Inc. | retired | 21.4 km |