Nameplate capacity
925 MW
Rank in Ohio
#13
of 219 plants
In service since
1977
November 1977
Details
- Primary fuel
- Nuclear
- Technology
- Nuclear
- Operator
- Energy Harbor Nuclear Generation LLC
- County
- Ottawa County
- Generating units
- 1
- Share of state capacity
- 2.59%
- Rank among nuclear plants in Ohio
- #2 of 2
- EIA plant code
- 6149
Generating units
| Unit | Technology | Nameplate | Summer | Online | Status |
|---|---|---|---|---|---|
| 1 | Nuclear | 925 MW | 894 MW | 1977 | 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 Ohio
| Trumbull Energy Center | Natural gas | 977 MW |
| Middletown- Ohio | Natural gas | 962 MW |
| Waterford Power, LLC | Natural gas | 922 MW |
| Carroll County Energy | Natural gas | 832 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 925 MW solar plant and a 925 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