Nameplate capacity
19 MW
Rank in Iowa
#135
of 305 plants
In service since
1963
September 1963
Details
- Primary fuel
- Natural gas
- Technology
- Natural Gas Internal Combustion Engine
- Operator
- City of Osage - (IA)
- County
- Mitchell County
- Generating units
- 6
- Share of state capacity
- 0.08%
- Rank among natural gas plants in Iowa
- #25 of 42
- EIA plant code
- 1172
Generating units
| Unit | Technology | Nameplate | Summer | Online | Status |
|---|---|---|---|---|---|
| 6 | Natural Gas Internal Combustion Engine | 6.2 MW | 6.0 MW | 1973 | Standby/Backup: available for service but not normally used |
| 7 | Petroleum Liquids | 3.6 MW | 3.6 MW | 1996 | Standby/Backup: available for service but not normally used |
| 8 | Petroleum Liquids | 3.6 MW | 3.6 MW | 1998 | Standby/Backup: available for service but not normally used |
| 5 | Natural Gas Internal Combustion Engine | 3.2 MW | 3.1 MW | 1963 | Standby/Backup: available for service but not normally used |
| W1 | Onshore Wind Turbine | 1.6 MW | 0.5 MW | 2009 | Operating |
| SO | Solar Photovoltaic | 0.8 MW | 0.8 MW | 2016 | 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
| Shenandoah | Other | 20 MW |
| Winnebago Wind Power Project | Wind | 20 MW |
| Waterloo Lundquist | Other | 18 MW |
| Lake Mills | Other | 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 19 MW solar plant and a 19 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