Nameplate capacity
18 MW
Rank in Iowa
#137
of 305 plants
In service since
1962
November 1962
Details
- Primary fuel
- Other
- Technology
- Petroleum Liquids
- Operator
- City of Lake Mills
- County
- Winnebago County
- Generating units
- 4
- Share of state capacity
- 0.07%
- Rank among other plants in Iowa
- #13 of 90
- EIA plant code
- 1154
Generating units
| Unit | Technology | Nameplate | Summer | Online | Status |
|---|---|---|---|---|---|
| 7 | Petroleum Liquids | 7.6 MW | 7.6 MW | 1999 | Operating |
| 6 | Petroleum Liquids | 5.7 MW | 5.7 MW | 1979 | Operating |
| 8 | Petroleum Liquids | 3.1 MW | 3.1 MW | 2022 | Operating |
| 4 | Petroleum Liquids | 1.3 MW | 1.3 MW | 1962 | 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 Iowa
| Osage (IA) | Natural gas | 19 MW |
| Waterloo Lundquist | Other | 18 MW |
| Winterset | Natural gas | 18 MW |
| Vinton | Natural gas | 18 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 18 MW solar plant and a 18 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 Iowa power plants · What Iowa actually generates