York Energy Center
York County, Pennsylvania · EIA plant ID 55524 · Operator: Calpine Mid-Merit LLC
Nameplate1,449MWSummer 1,404 MW
Generators7in service
Net generation9,022GWh12 mo to Aug 2026
Capacity factor73%gas/coal/oil units, summer MW
Heat rate7,429Btu/kWhfossil units, electric fuel, HHV
First online2011Runs as baseload
The 12-month figures include preliminary EIA-923 months, which EIA revises. Final data runs through Dec 2025.
Monthly net generation
EIA-923, all units at the plant. Net of station use; storage can go negative.
FinalPreliminary
Capacity factor by year
Net MWh ÷ (summer MW × hours), gas/coal/oil units. Each year uses that year's EIA-860 ratings; the hollow dot is the latest 12 months.
Heat rate by year
Electric fuel MMBtu × 1000 ÷ net MWh (Btu/kWh, HHV), fossil units only; CT + CA counted as one combined-cycle block.
Annual data table
| Year | Net GWh | Capacity factor | Heat rate (Btu/kWh) |
|---|---|---|---|
| 2011 | 1,294.3 | 32.3% | 7,879 |
| 2012 | 3,483.4 | 72.8% | 7,784 |
| 2013 | 2,018.7 | 42.3% | 7,892 |
| 2014 | 2,537.3 | 53.1% | 7,917 |
| 2015 | 1,976.6 | 41.4% | 7,901 |
| 2016 | 1,552.4 | 32.4% | 8,028 |
| 2017 | 1,590.3 | 33.3% | 8,006 |
| 2018 | 1,838.9 | 38.5% | 7,967 |
| 2019 | 5,340.6 | 49.2% | 7,192 |
| 2020 | 8,565.8 | 71.0% | 7,217 |
| 2021 | 7,649 | 63.6% | 7,266 |
| 2022 | 7,125.3 | 59.3% | 7,286 |
| 2023 | 8,631.4 | 70.2% | 7,352 |
| 2024 | 9,155.3 | 74.2% | 7,327 |
| 2025 | 8,785.6 | 71.4% | 7,363 |
Fuel capability
Gas-fired turbines (CT/GT/CA/CS) that can also burn liquid fuel. EIA-860 Schedule 3 for capability, EIA-923 for actual burn.
StatusLikely still dual fuel
Liquid fuel burned · 36 mo708,750 MMBtu
Last month with liquid burnFeb 2026
Switch while operatingYes
Net summer MW on gas1,329
Net summer MW on oil1,329
Time gas → oilup to 6 h (EIA 6H)
Time oil → gasup to 6 h (EIA 6H)
Generators
EIA-860 (annual) with EIA-860M updates through Sep 2026. EIA-923 reports generation by plant, prime mover and fuel, not by unit, so unit-level output isn't shown.
| Gen ID | Technology | Prime mover | Nameplate MW | Summer MW | Online | Status | Planned retirement | OEM / model |
|---|---|---|---|---|---|---|---|---|
| CTG1 | Natural Gas Fired Combined Cycle | CT | 120 | 125 | Mar 2011 | Operating | — | coming soon |
| CTG2 | Natural Gas Fired Combined Cycle | CT | 120 | 125 | Mar 2011 | Operating | — | coming soon |
| CTG3 | Natural Gas Fired Combined Cycle | CT | 120 | 125 | Mar 2011 | Operating | — | coming soon |
| CTG5 | Natural Gas Fired Combined Cycle | CT | 234.9 | 214 | Mar 2019 | Operating | — | coming soon |
| CTG6 | Natural Gas Fired Combined Cycle | CT | 234.9 | 214 | Mar 2019 | Operating | — | coming soon |
| STG1 | Natural Gas Fired Combined Cycle | CA | 200 | 194 | Mar 2011 | Operating | — | coming soon |
| STG2 | Natural Gas Fired Combined Cycle | CA | 419.6 | 407 | Mar 2019 | Operating | — | coming soon |
Owner / operator
Operator: Calpine Mid-Merit LLC. Ownership shares by in-service nameplate MW (EIA-860 Schedule 4; units not listed there are wholly owned by the operator).
| Calpine Mid-Merit LLC | 100.0% | 1,449 MW |
Nearby plants
Within 80 km.
| Peach Bottom | 2,876 MW | 4 km |
| Muddy Run | 1,072 MW | 7.8 km |
| PPL Holtwood | 247 MW | 10.2 km |
| Wildcat Point Generation Facility | 1,114 MW | 12.6 km |
| NAEA Rock Springs LLC | 796 MW | 12.7 km |
| Conowingo | 531 MW | 14.4 km |