Nameplate capacity
25 MW
Rank in Ohio
#92
of 219 plants
In service since
1992
August 1992
Details
- Primary fuel
- Other
- Technology
- Petroleum Liquids
- Operator
- City of St Marys - (OH)
- County
- Auglaize County
- Generating units
- 2
- Share of state capacity
- 0.07%
- Rank among other plants in Ohio
- #5 of 53
- EIA plant code
- 2942
Generating units
| Unit | Technology | Nameplate | Summer | Online | Status |
|---|---|---|---|---|---|
| 7 | Petroleum Liquids | 14 MW | 12 MW | 1992 | Standby/Backup: available for service but not normally used |
| GT1 | Natural Gas Fired Combustion Turbine | 11 MW | 10 MW | 1999 | Standby/Backup: available for service but not normally used |
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 Ohio
| Niles Power Plant | Other | 27 MW |
| Ashtabula | Natural gas | 26 MW |
| DG AMP Solar Bowling Green | Solar | 20 MW |
| CZ Solar Warren, LLC | Solar | 20 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 25 MW solar plant and a 25 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 Ohio power plants · What Ohio actually generates