Nameplate capacity
3.1 MW
Rank in Iowa
#224
of 305 plants
In service since
1990
December 1990
Details
- Primary fuel
- Other
- Technology
- Petroleum Liquids
- Operator
- City of Graettinger - (IA)
- County
- Palo Alto County
- Generating units
- 2
- Share of state capacity
- 0.01%
- Rank among other plants in Iowa
- #66 of 90
- EIA plant code
- 1142
Generating units
| Unit | Technology | Nameplate | Summer | Online | Status |
|---|---|---|---|---|---|
| 6 | Petroleum Liquids | 2.0 MW | 2.0 MW | 2002 | Operating |
| 5 | Petroleum Liquids | 1.1 MW | 1.1 MW | 1990 | 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
| Indianola Solar | Solar | 3.4 MW |
| Ottumwa City of | Hydro | 3.2 MW |
| Forest City Solar | Solar | 3.0 MW |
| Johnson County Hills Solar | Solar | 3.0 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 3.1 MW solar plant and a 3.1 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