Frederic Diesel
Other power plant · Polk County, Wisconsin
Nameplate capacity
14 MW
Rank in Wisconsin
#95
of 278 plants
In service since
1948
December 1948
Details
- Primary fuel
- Other
- Technology
- Petroleum Liquids
- Operator
- Northwestern Wisconsin Elec Co
- County
- Polk County
- Generating units
- 9
- Share of state capacity
- 0.07%
- Rank among other plants in Wisconsin
- #7 of 36
- EIA plant code
- 4020
Generating units
| Unit | Technology | Nameplate | Summer | Online | Status |
|---|---|---|---|---|---|
| 10 | Petroleum Liquids | 2.5 MW | 2.5 MW | 2000 | Operating |
| 8 | Petroleum Liquids | 2.5 MW | 2.5 MW | 2000 | Operating |
| 9 | Petroleum Liquids | 2.5 MW | 2.5 MW | 2000 | Operating |
| 6 | Petroleum Liquids | 1.8 MW | 1.7 MW | 1970 | Operating |
| 7 | Petroleum Liquids | 1.7 MW | 1.8 MW | 1975 | Operating |
| 2 | Petroleum Liquids | 0.7 MW | 0.7 MW | 1948 | Operating |
| 3 | Petroleum Liquids | 0.7 MW | 0.7 MW | 1949 | Operating |
| 4 | Petroleum Liquids | 0.7 MW | 0.6 MW | 1955 | Operating |
| 5 | Petroleum Liquids | 0.6 MW | 0.5 MW | 1955 | 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
| Nine Springs | Natural gas | 16 MW |
| Castle Rock | Hydro | 15 MW |
| Omega Hills Gas Recovery | Other | 13 MW |
| Dells | Hydro | 12 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 14 MW solar plant and a 14 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