York Energy Center
Natural gas power plant · York County, Pennsylvania
Details
- Primary fuel
- Natural gas
- Technology
- Natural Gas Fired Combined Cycle
- Operator
- Calpine Mid-Merit LLC
- County
- York County
- Generating units
- 7
- Share of state capacity
- 2.73%
- Rank among natural gas plants in Pennsylvania
- #5 of 72
- EIA plant code
- 55524
Generating units
| Unit | Technology | Nameplate | Summer | Online | Status |
|---|---|---|---|---|---|
| STG2 | Natural Gas Fired Combined Cycle | 420 MW | 407 MW | 2019 | Operating |
| CTG5 | Natural Gas Fired Combined Cycle | 235 MW | 214 MW | 2019 | Operating |
| CTG6 | Natural Gas Fired Combined Cycle | 235 MW | 214 MW | 2019 | Operating |
| STG1 | Natural Gas Fired Combined Cycle | 200 MW | 194 MW | 2011 | Operating |
| CTG1 | Natural Gas Fired Combined Cycle | 120 MW | 125 MW | 2011 | Operating |
| CTG2 | Natural Gas Fired Combined Cycle | 120 MW | 125 MW | 2011 | Operating |
| CTG3 | Natural Gas Fired Combined Cycle | 120 MW | 125 MW | 2011 | 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
| Brunner Island | Natural gas | 1,616 MW |
| Lackawanna Energy Center | Natural gas | 1,499 MW |
| Fairless Energy Center | Natural gas | 1,338 MW |
| CPV Fairview Energy Center | Natural gas | 1,197 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 1,449 MW solar plant and a 1,449 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