# Bethlehem Power Plant

PJM Natural Gas Fired Combined Cycle · https://askthegrid.com/assets/facilities/bethlehem-power-plant

Bethlehem Power Plant is a natural gas-fired power facility with 1,153 MW of EIA-reported nameplate capacity in Northampton County, Pennsylvania, registered as EIA Plant ID 55690. The plant's generating configuration is eight generating units using natural-gas-fired combined-cycle technology, with distillate fuel oil as a secondary/switchable fuel.

## Key facts

- Technology: Natural Gas Fired Combined Cycle
- Power capacity: 1153 MW
- Commercial operation: 2003
- Operating status: operating

## Grid and market context

- ISO/RTO: PJM
- Balancing authority: PJM Interconnection, LLC (PJM)

## Source-backed facts

- Identifiers: [{"value":"55690","system":"EIA plant ID"},{"value":"56607","system":"EIA utility ID"},{"value":"PJM Interconnection, LLC (PJM)","system":"ISO/RTO and balancing authority"},{"value":"RFC","system":"NERC region"},{"value":"CTG1","system":"EIA generator identifier"},{"value":"CTG2","system":"EIA generator identifier"},{"value":"CTG3","system":"EIA generator identifier"},{"value":"CTG5","system":"EIA generator identifier"},{"value":"STG8","system":"EIA generator identifier"},{"value":"CTG6","system":"EIA generator identifier"},{"value":"CTG7","system":"EIA generator identifier"},{"value":"STG4","system":"EIA generator identifier"},{"value":"02-163-000","system":"FERC Exempt Wholesale Generator docket"},{"value":"ER14-874-003","system":"FERC rate docket"},{"value":"Bethlehem Energy (Calpine)","system":"PJM 202(c) specified-resource name"}] — Source · confidence: medium
- Description: Bethlehem Power Plant is an operating natural-gas-fired combined-cycle facility at 2254 Applebutter Road in Bethlehem, Northampton County, Pennsylvania. The plant has eight generating units and 1,153 MW of nameplate capacity, with initial operation beginning in December 2002 and the facility opening in 2003. It is located in the PJM market and was operated by Constellation and Calpine as of August 2, 2026; Constellation had announced a planned sale of the Bethlehem facility to LS Power, but the sale had not yet occurred. — Bethlehem power plant officially under new ownership | Lehigh Valley Regional News | wfmz.com · confidence: medium
- Description: Bethlehem Power Plant is an operating natural-gas-fired combined-cycle facility at 2254 Applebutter Road in Bethlehem, Northampton County, Pennsylvania. The plant has eight generating units and 1,153 MW of nameplate capacity, with initial operation beginning in December 2002 and the facility opening in 2003. It is located in the PJM market and was operated by Constellation and Calpine as of August 2, 2026; Constellation had announced a planned sale of the Bethlehem facility to LS Power, but the sale had not yet occurred. — Source · confidence: medium
- Identifiers.14: {"value":"Bethlehem Energy (Calpine)","system":"PJM 202(c) specified-resource name"} — Source · confidence: medium
- Parties.3: {"relationship":"Balancing authority and regional transmission organization","name":"PJM Interconnection, LLC","official_url":"https://www.pjm.com/"} — Source · confidence: high
- Product url: https://www.siemens-energy.com/global/en/home/products-services/product/sgt6-2000e.html — SGT6-2000E Heavy-duty gas turbine (60 Hz) · confidence: medium
- Product url: https://www.siemens-energy.com/global/en/home/products-services/product/sgt6-2000e.html — Steam Turbine Power Plant Solutions | GE Vernova · confidence: medium
- Manufacturer domain: siemens-energy.com — SGT6-2000E Heavy-duty gas turbine (60 Hz) · confidence: medium
- Product family: Siemens SGT6-2000E — SGT6-2000E Heavy-duty gas turbine (60 Hz) · confidence: high
- Equipment models.2: {"manufacturer_domain":"cicgroup.com","product_url":"https://cicgroup.com/nooter-eriksen/heat-recovery-steam-generators-hrsgs/","count":6,"unit_mw":null,"name":"Nooter/Eriksen heat-recovery steam generator (HRSG); exact model not disclosed"} — Heat Recovery Steam Generators - HRSGs - Nooter Eriksen · confidence: medium
- Description: Bethlehem Power Plant is a 1,153 MW natural-gas-fired combined-cycle facility in Northampton County, Pennsylvania, with eight generators and multiple development phases. The facility is owned and operated through Calpine Bethlehem LLC within the Calpine/Constellation group. Constellation completed its acquisition of Calpine from Energy Capital Partners on January 7, 2026, thereby acquiring the Calpine portfolio that included Bethlehem. The plant was commissioned in December 2002 and is described in other coverage as opening and beginning commercial operation in 2003. On March 18, 2026, Constellation agreed to sell Bethlehem, as part of a 4.4 GW PJM portfolio, to LS Power; the sale was expected to close later in 2026 subject to regulatory approvals. — Constellation Completes Calpine Transaction, Powering America's Clean Energy Future · confidence: medium
- Quality notes: ["Capacity sources differ slightly: the EIA-linked directory value is 1,153 MW, while some 2025 coverage reports 1,134 MW; this directory uses the 1,153 MW value associated with EIA plant ID 55690.","The commissioning and commercial-operation dates are reported differently: a project profile gives December 2002 for commissioning, while plant coverage gives 2003 for opening or commercial operation. This may reflect initial-unit commissioning versus facility-level operation.","No plant-specific construction financing or construction-start date is disclosed in the located project records. No verified expansion, retirement, or repowering milestone was identified; the project profile lists project financing companies as N/A."] — Calpine to sell 3.5 GW of gas generation in PJM as part of... · confidence: medium
- Quality notes: ["Capacity sources differ slightly: the EIA-linked directory value is 1,153 MW, while some 2025 coverage reports 1,134 MW; this directory uses the 1,153 MW value associated with EIA plant ID 55690.","The commissioning and commercial-operation dates are reported differently: a project profile gives December 2002 for commissioning, while plant coverage gives 2003 for opening or commercial operation. This may reflect initial-unit commissioning versus facility-level operation.","No plant-specific construction financing or construction-start date is disclosed in the located project records. No verified expansion, retirement, or repowering milestone was identified; the project profile lists project financing companies as N/A."] — Bethlehem Power Plant, US · confidence: medium
- Financing summary: No plant-specific project-financing or construction-debt amount is disclosed; the project profile lists project financing companies as N/A. Constellation's January 7, 2026 acquisition of Calpine from Energy Capital Partners was reported at $26.6 billion including debt, a company-level transaction rather than Bethlehem-specific consideration. The March 18, 2026 proposed sale of Bethlehem and other PJM assets to LS Power was valued at $5 billion before closing adjustments, representing portfolio sale consideration rather than project financing; closing was expected later in 2026 subject to regulatory approvals. — Bethlehem power plant officially under new ownership · confidence: medium
- Timeline: [{"event":"Commissioning / initial operation","date":"2002-12","detail":"The Bethlehem Power Plant project profile states that, after construction completion, the project was commissioned in December 2002."},{"event":"Commercial operation / facility opening","date":"2003","detail":"Plant coverage identifies Bethlehem Energy Center as having begun commercial operation in 2003 and local coverage describes the facility as opening in 2003."},{"event":"Corporate acquisition and ownership transfer","date":"2026-01-07","detail":"Constellation completed its acquisition of Calpine Corporation from Energy Capital Partners. Bethlehem was part of the Calpine generation portfolio and consequently moved into the Constellation group."},{"event":"Announced sale to LS Power","date":"2026-03-18","detail":"Constellation and LS Power announced an agreement for LS Power to acquire a 4.4 GW PJM portfolio including Bethlehem, York 1, York 2, Hay Road, and Edge Moor. The portfolio transaction was valued at $5 billion before closing adjustments, with closing subject to regulatory approvals and expected later in 2026."}] — Bethlehem Power Plant, US · confidence: medium
- Timeline: [{"event":"Commissioning / initial operation","date":"2002-12","detail":"The Bethlehem Power Plant project profile states that, after construction completion, the project was commissioned in December 2002."},{"event":"Commercial operation / facility opening","date":"2003","detail":"Plant coverage identifies Bethlehem Energy Center as having begun commercial operation in 2003 and local coverage describes the facility as opening in 2003."},{"event":"Corporate acquisition and ownership transfer","date":"2026-01-07","detail":"Constellation completed its acquisition of Calpine Corporation from Energy Capital Partners. Bethlehem was part of the Calpine generation portfolio and consequently moved into the Constellation group."},{"event":"Announced sale to LS Power","date":"2026-03-18","detail":"Constellation and LS Power announced an agreement for LS Power to acquire a 4.4 GW PJM portfolio including Bethlehem, York 1, York 2, Hay Road, and Edge Moor. The portfolio transaction was valued at $5 billion before closing adjustments, with closing subject to regulatory approvals and expected later in 2026."}] — Calpine to sell 3.5 GW of gas generation in PJM as part of... · confidence: medium
- Timeline: [{"event":"Commissioning / initial operation","date":"2002-12","detail":"The Bethlehem Power Plant project profile states that, after construction completion, the project was commissioned in December 2002."},{"event":"Commercial operation / facility opening","date":"2003","detail":"Plant coverage identifies Bethlehem Energy Center as having begun commercial operation in 2003 and local coverage describes the facility as opening in 2003."},{"event":"Corporate acquisition and ownership transfer","date":"2026-01-07","detail":"Constellation completed its acquisition of Calpine Corporation from Energy Capital Partners. Bethlehem was part of the Calpine generation portfolio and consequently moved into the Constellation group."},{"event":"Announced sale to LS Power","date":"2026-03-18","detail":"Constellation and LS Power announced an agreement for LS Power to acquire a 4.4 GW PJM portfolio including Bethlehem, York 1, York 2, Hay Road, and Edge Moor. The portfolio transaction was valued at $5 billion before closing adjustments, with closing subject to regulatory approvals and expected later in 2026."}] — Constellation Completes Calpine Transaction, Powering America's Clean Energy Future · confidence: medium
- Timeline.0: {"event":"Commissioning / initial operation","date":"2002-12","detail":"The Bethlehem Power Plant project profile states that, after construction completion, the project was commissioned in December 2002."} — Bethlehem Power Plant, US · confidence: medium
- Timeline.1: {"event":"Commercial operation / facility opening","date":"2003","detail":"Plant coverage identifies Bethlehem Energy Center as having begun commercial operation in 2003 and local coverage describes the facility as opening in 2003."} — Calpine to sell 3.5 GW of gas generation in PJM as part of... · confidence: medium
- Timeline.1: {"event":"Commercial operation / facility opening","date":"2003","detail":"Plant coverage identifies Bethlehem Energy Center as having begun commercial operation in 2003 and local coverage describes the facility as opening in 2003."} — Bethlehem power plant officially under new ownership · confidence: medium
- Timeline.2: {"event":"Corporate acquisition and ownership transfer","date":"2026-01-07","detail":"Constellation completed its acquisition of Calpine Corporation from Energy Capital Partners. Bethlehem was part of the Calpine generation portfolio and consequently moved into the Constellation group."} — Constellation Completes Calpine Transaction, Powering America's Clean Energy Future · confidence: medium
- Commercial parties.0: {"relationship":"Legal owner and plant operator","name":"Calpine Bethlehem LLC","detail":"Calpine Bethlehem LLC is identified as the utility owning and operating the Bethlehem facility; the entity remained within the Constellation group after the January 2026 Calpine acquisition.","official_url":"https://www.calpine.com/"} — Bethlehem Power Plant, US · confidence: medium
- Commercial parties.2: {"relationship":"Predecessor parent and seller in the corporate acquisition","name":"Energy Capital Partners","detail":"Energy Capital Partners was the seller of Calpine Corporation to Constellation in the transaction completed on January 7, 2026. The evidence supports ECP as the predecessor parent-level owner, not as a separately documented direct seller of the Bethlehem plant.","official_url":"https://www.ecpgp.com/"} — Constellation Completes Calpine Transaction, Powering America's Clean Energy Future · confidence: medium
- Commercial parties.2: {"relationship":"Predecessor parent and seller in the corporate acquisition","name":"Energy Capital Partners","detail":"Energy Capital Partners was the seller of Calpine Corporation to Constellation in the transaction completed on January 7, 2026. The evidence supports ECP as the predecessor parent-level owner, not as a separately documented direct seller of the Bethlehem plant.","official_url":"https://www.ecpgp.com/"} — Bethlehem power plant officially under new ownership · confidence: medium
- Quality notes.0: Capacity sources differ slightly: the EIA-linked directory value is 1,153 MW, while some 2025 coverage reports 1,134 MW; this directory uses the 1,153 MW value associated with EIA plant ID 55690. — Calpine to sell 3.5 GW of gas generation in PJM as part of... · confidence: high
- Quality notes.1: The commissioning and commercial-operation dates are reported differently: a project profile gives December 2002 for commissioning, while plant coverage gives 2003 for opening or commercial operation. This may reflect initial-unit commissioning versus facility-level operation. — Bethlehem Power Plant, US · confidence: high
- Quality notes.1: The commissioning and commercial-operation dates are reported differently: a project profile gives December 2002 for commissioning, while plant coverage gives 2003 for opening or commercial operation. This may reflect initial-unit commissioning versus facility-level operation. — Calpine to sell 3.5 GW of gas generation in PJM as part of... · confidence: high
- Quality notes.2: No plant-specific construction financing or construction-start date is disclosed in the located project records. No verified expansion, retirement, or repowering milestone was identified; the project profile lists project financing companies as N/A. — Bethlehem Power Plant, US · confidence: medium
- Resource type: GEN / Generation Capacity Resource — Source · confidence: medium
- Status detail: Operating with all eight generators reported operational. Constellation's announced sale of the Bethlehem facility to LS Power is an ownership divestiture, not a retirement or closure; as of the current-status reporting date, Constellation and Calpine continued to operate the facility. PJM also identified Bethlehem Energy (Calpine) as a dual-fuel covered resource subject to fuel-oil, NOx, and CO operating limits during its January 2026 reliability-emergency request. — Source · confidence: medium

## Sources

- [Source](https://www.pjm.com/-/media/DotCom/documents/other-fed-state/20260124-pjm-202c-request-exhibit-a.pdf) — pjm.com · tier other
- [Bethlehem power plant officially under new ownership](https://www.wfmz.com/news/area/lehighvalley/bethlehem-power-plant-officially-under-new-ownership/article_43511f9c-498d-4363-b6fe-8fab4790863b.html) — wfmz.com · tier other
- [Bethlehem power plant officially under new ownership | Lehigh Valley Regional News | wfmz.com](https://wfmz.com/news/area/lehighvalley/bethlehem-power-plant-officially-under-new-ownership/article_43511f9c-498d-4363-b6fe-8fab4790863b.html) — wfmz.com · tier other
- [Bethlehem Power Plant, US](https://www.power-technology.com/marketdata/bethlehem-power-plant-us/) — power-technology.com · tier other
- [SGT6-2000E Heavy-duty gas turbine (60 Hz)](https://www.siemens-energy.com/global/en/home/products-services/product/sgt6-2000e.html) — siemens-energy.com · tier other
- [Steam Turbine Power Plant Solutions | GE Vernova](https://www.gevernova.com/gas-power/products/steam-turbines) — gevernova.com · tier other
- [Heat Recovery Steam Generators - HRSGs - Nooter Eriksen](https://cicgroup.com/nooter-eriksen/heat-recovery-steam-generators-hrsgs/) — cicgroup.com · tier other
- [Constellation Completes Calpine Transaction, Powering America's Clean Energy Future](https://www.constellationenergy.com/news/2026/01/constellation-completes-calpine-transaction-powering-americas-clean-energy-future.html) — constellationenergy.com · tier other
- [Calpine to sell 3.5 GW of gas generation in PJM as part of ...](https://www.power-eng.com/gas/calpine-to-sell-3-5-gw-of-gas-generation-in-pjm-as-part-of-constellation-acquisition/) — power-eng.com · tier other
- [Source](https://constellationenergy.com/news/2026/03/constellation-announces-agreement-to-sell-pjm-generation-assets-to-ls-power-as-part-of-ferc-us-doj-resolution-of-calpine-transaction.html) — constellationenergy.com · tier other
- [Source](https://www.monitoringanalytics.com/Filings/2014/IMM_Comments_Docket_No_ER15-376-000_20141217.pdf) — monitoringanalytics.com · tier other

## Data quality

- Capacity sources differ slightly: the EIA-linked directory value is 1,153 MW, while some 2025 coverage reports 1,134 MW; this directory uses the 1,153 MW value associated with EIA plant ID 55690. This may reflect initial-unit commissioning versus facility-level operation. No plant-specific construction financing or construction-start date is disclosed in the located project records. No verified expansion, retirement, or repowering milestone was identified; the project profile lists project financing companies as N/A.

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