Eddystone Generating Station
Natural gas power plant · Delaware County, Pennsylvania
Details
- Primary fuel
- Natural gas
- Technology
- Natural Gas Steam Turbine
- Operator
- Constellation Power, Inc
- County
- Delaware County
- Generating units
- 6
- Share of state capacity
- 1.62%
- Rank among natural gas plants in Pennsylvania
- #16 of 72
- EIA plant code
- 3161
Generating units
| Unit | Technology | Nameplate | Summer | Online | Status |
|---|---|---|---|---|---|
| 3 | Natural Gas Steam Turbine | 391 MW | 380 MW | 1974 | Operating |
| 4 | Natural Gas Steam Turbine | 391 MW | 380 MW | 1976 | Operating |
| 30 | Petroleum Liquids | 21 MW | 17 MW | 1970 | Operating |
| 40 | Petroleum Liquids | 21 MW | 17 MW | 1970 | Operating |
| 10 | Petroleum Liquids | 19 MW | 13 MW | 1967 | Operating |
| 20 | Petroleum Liquids | 19 MW | 13 MW | 1967 | 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 Pennsylvania
| Hamilton Liberty | Natural gas | 870 MW |
| Hamilton Patriot Generation Plant | Natural gas | 870 MW |
| Marcus Hook Energy LP | Natural gas | 836 MW |
| Ironwood LLC | Natural gas | 778 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 862 MW solar plant and a 862 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 Pennsylvania power plants · What Pennsylvania actually generates