South Oak Creek
Coal power plant · Milwaukee County, Wisconsin
Nameplate capacity
642 MW
Rank in Wisconsin
#8
of 278 plants
In service since
1965
March 1965
Details
- Primary fuel
- Coal
- Technology
- Conventional Steam Coal
- Operator
- Wisconsin Electric Power Co
- County
- Milwaukee County
- Generating units
- 2
- Share of state capacity
- 3.25%
- Rank among coal plants in Wisconsin
- #4 of 7
- EIA plant code
- 4041
Generating units
| Unit | Technology | Nameplate | Summer | Online | Status |
|---|---|---|---|---|---|
| 8 | Conventional Steam Coal | 324 MW | 310 MW | 1967 | Operating |
| 7 | Conventional Steam Coal | 318 MW | 307 MW | 1965 | 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
| West Riverside Energy Center | Natural gas | 728 MW |
| Riverside Energy Center | Natural gas | 675 MW |
| Fox Energy Center | Natural gas | 619 MW |
| RockGen Energy Center | Natural gas | 561 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 642 MW solar plant and a 642 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