York Energy Center
Calpine Mid-Merit LLCYork County
York Energy Center is a natural gas-fired power facility with 1,449.4 MW of EIA-reported nameplate capacity in York County, Pennsylvania, registered as EIA Plant ID 55524. Calpine Mid-Merit LLC owns and operates the plant. The plant's generating configuration is seven operating dual-fuel natural-gas combined-cycle generators: Block 1/CCB1 has CTG1, CTG2, CTG3, and STG1 (3 combustion turbines plus 1 steam turbine), while Block 2/CCB2 has CTG5, CTG6, and STG2 (2 combustion turbines plus 1 steam turbine). The facility interconnects at Bramah Substation at 500 kV.
Mapped infrastructure geometry associated with this asset.
Natural Gas Fired Combined Cycle
York Energy Center is operating.
500 kV · PECO Energy Co
PJM
EIA plant 55524 · Inventory for Sep 2026.
| Generator | Technology | Status | Power (MW) | Energy (MWh) |
|---|---|---|---|---|
| CTG1 | Natural Gas Fired Combined Cycle | Operating | 120 | Unknown |
| CTG2 | Natural Gas Fired Combined Cycle | Operating | 120 | Unknown |
| CTG3 | Natural Gas Fired Combined Cycle | Operating | 120 | Unknown |
| CTG5 | Natural Gas Fired Combined Cycle | Operating | 234.9 | Unknown |
| CTG6 | Natural Gas Fired Combined Cycle |
Similar plants ranked by technology, capacity, and distance.
Current generator records and technology attributes reported through EIA-860.
| Generator | Capacity | Technology | Operation | Status |
|---|---|---|---|---|
| CTG1 | 120 MW 125 MW summer | Natural Gas Fired Combined Cycle CT | Mar 2011 | Operating |
| CTG2 | 120 MW 125 MW summer | Natural Gas Fired Combined Cycle CT | Mar 2011 | Operating |
| CTG3 | 120 MW 125 MW summer | Natural Gas Fired Combined Cycle CT | Mar 2011 | Operating |
| CTG5 | 234.9 MW 214 MW summer | Natural Gas Fired Combined Cycle CT | Mar 2019 | Operating |
| CTG6 | 234.9 MW | |||
Monthly EIA generation history and recent market-resource behavior where linked telemetry is available.
Deterministic links to ERCOT market resources, price records, outage disclosures, queue records, and nearby infrastructure. Candidate joins remain labeled until corroborated.
Source-backed project transactions, agreements, land records, permits, and environmental disclosures. Portfolio and adjacent-project facts remain explicitly scoped.
Parties, market resources, and identifiers tied to this asset, with owner, operator, developer, EPC, compliance provider, and interconnecting entity roles kept separate.
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Project milestones and public references behind the asset profile.
EIA-860 lists generator CTG1, generator CTG2, generator CTG3, generator STG1 with this operating date.
PJM · York County
| Operating |
| 234.9 |
| Unknown |
| STG1 | Natural Gas Fired Combined Cycle | Operating | 200 | Unknown |
|---|
| STG2 | Natural Gas Fired Combined Cycle | Operating | 419.6 | Unknown |
|---|
| CTG7 | Natural Gas Fired Combined Cycle | canceled_or_postponed | 120 | Unknown |
|---|
Monthly generation is reported through EIA-923. Capacity factor uses the current EIA nameplate capacity and is shown only for complete calendar years.
Portfolio membership follows the latest EIA-860 reporting entity. It does not imply ultimate ownership.
Energy Capital Partners announced a roughly $17 billion take-private of Calpine, establishing the predecessor ownership context for Calpine's York assets.
An Energy Capital Partners-led consortium, including Access Industries and Canada Pension Plan Investment Board, completed the acquisition of Calpine; Calpine stockholders received $15.25 per share in cash.
EIA-860 lists generator CTG5, generator CTG6, generator STG2 with this operating date.
McDermott announced substantial completion of the York 2 combined-cycle EPC project and turnover to Calpine Mid-Merit LLC for commercial operations.
The proposed antitrust remedy for the Calpine acquisition identified York Energy Center, consisting of York 1 and York 2, among the PJM facilities required to be divested.
Constellation completed its acquisition of Calpine from Energy Capital Partners, thereby becoming the parent company of Calpine's York assets.
Answered from the published record above. Questions whose inputs this profile does not carry are omitted rather than estimated.
York Energy Center reports 1,449.4 MW natural gas of operating nameplate capacity. These technology ratings do not establish a common export limit. Source: EIA Sep 2026.
York Energy Center is a Natural Gas Fired Combined Cycle facility in York County, PA, participating in the PJM market.
York Energy Center is in York County, PA, inside the PJM balancing area.
York Energy Center is operated by Calpine Mid-Merit LLC according to the EIA generator inventory. Reporting membership does not by itself establish ultimate ownership.
York Energy Center reported 9,024.1 GWh over the twelve months to 2026-07. Figures are net generation as filed to EIA-923.
York Energy Center interconnects at Bramah Substation, on the PECO Energy Co system.
By capacity, York Energy Center ranks #24 of 540 operating plants of the same technology nationally. It ranks #2 of 26 in PA.
Plants within 25 km, nearest first, regardless of technology. Proximity is straight-line distance between mapped plant coordinates; it does not by itself establish a shared point of interconnection.
