Nameplate capacity
946 MW
Rank in Wisconsin
#5
of 278 plants
In service since
1981
December 1981
Details
- Primary fuel
- Coal
- Technology
- Conventional Steam Coal
- Operator
- Wisconsin Public Service Corp
- County
- Marathon County
- Generating units
- 2
- Share of state capacity
- 4.79%
- Rank among coal plants in Wisconsin
- #3 of 7
- EIA plant code
- 4078
Generating units
| Unit | Technology | Nameplate | Summer | Online | Status |
|---|---|---|---|---|---|
| 4 | Conventional Steam Coal | 595 MW | 553 MW | 2008 | Operating |
| 3 | Conventional Steam Coal | 351 MW | 335 MW | 1981 | Operating |
Nameplate is the maximum rated output; summer capacity is what the unit can reliably deliver on a hot day, which is typically lower.
Similarly sized plants in Wisconsin
| Port Washington Generating Station | Natural gas | 1,230 MW |
| Columbia (WI) | Coal | 1,112 MW |
| West Riverside Energy Center | Natural gas | 728 MW |
| Riverside Energy Center | Natural gas | 675 MW |
About this data
From EIA’s inventory of operable generators, May 2026 release. Capacity is nameplate — the maximum rated output of the equipment, not what the plant actually generates over a year, which depends on how often it runs. A 946 MW solar plant and a 946 MW nuclear plant have the same entry here and produce very different amounts of electricity.
“In service since” is the earliest in-service date among the units still listed, so a site rebuilt around newer equipment can read as younger than the site itself. All Wisconsin power plants · What Wisconsin actually generates