# Ontelaunee Energy Center

PJM Natural Gas Fired Combined Cycle · https://askthegrid.com/assets/facilities/ontelaunee-energy-center

Ontelaunee Energy Center is a natural gas-fired power facility with 728 MW of EIA-reported nameplate capacity in Berks County, Pennsylvania, registered as EIA Plant ID 55193. Ontelaunee Power Operating Company LLC is the public owner or developer; Ontelaunee Energy Center is the registered plant entity or operator. LSP Ontelaunee Holding, LLC acquired a 100% interest in the plant from A subsidiary of Calpine Corporation in 2005.

## Key facts

- Technology: Natural Gas Fired Combined Cycle
- Power capacity: 728 MW
- Operating status: operating

## Grid and market context

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

## Source-backed facts

- Owner logo domain: vistracorp.com — Source · confidence: medium
- Description: Ontelaunee Energy Center is a natural-gas-fired combined-cycle plant in Berks County, Pennsylvania, at 5115 Pottsville Pike, Reading. Its three EIA-listed generators—CTG1, CTG2, and STG—have nameplate capacities of 250 MW, 250 MW, and 228 MW, respectively, for 728 MW total; all began operating in May 2002. The facility is in the PJM Interconnection balancing authority and uses the market designations ONTELAUN 18 KV CT1, ONTELAUN 18 KV CT2, and ONTELAUN 18 KV STM. — MBR | Index · confidence: medium
- Parties: [{"relationship":"Owner and permittee/operator","name":"Ontelaunee Power Operating Company LLC","official_url":null},{"relationship":"Parent owner","name":"Vistra Corp.","official_url":"https://vistracorp.com/"},{"relationship":"Original developer/owner (historical)","name":"Calpine Corporation","official_url":"https://www.calpine.com/"},{"relationship":"Historical buyer/owner","name":"LS Power Equity Partners, LP","official_url":"https://www.lspower.com/"},{"relationship":"Design and engineering contractor","name":"Parsons Energy & Chemicals Group","official_url":null},{"relationship":"Construction contractor","name":"Kvaerner Songer Incorporated","official_url":null},{"relationship":"Gas turbine, steam turbine, and generator OEM","name":"Siemens","official_url":"https://www.siemens-energy.com/"},{"relationship":"HRSG/steam boiler supplier","name":"Nooter/Eriksen","official_url":"https://cicgroup.com/nooter-eriksen/"},{"relationship":"HRSG repair contractor","name":"Bremco","official_url":null},{"relationship":"Reported gas supplier","name":"Spectra Energy","official_url":null}] — Calpine to sell Ontelaunee Energy Center for $225 million · confidence: medium
- Parties: [{"relationship":"Owner and permittee/operator","name":"Ontelaunee Power Operating Company LLC","official_url":null},{"relationship":"Parent owner","name":"Vistra Corp.","official_url":"https://vistracorp.com/"},{"relationship":"Original developer/owner (historical)","name":"Calpine Corporation","official_url":"https://www.calpine.com/"},{"relationship":"Historical buyer/owner","name":"LS Power Equity Partners, LP","official_url":"https://www.lspower.com/"},{"relationship":"Design and engineering contractor","name":"Parsons Energy & Chemicals Group","official_url":null},{"relationship":"Construction contractor","name":"Kvaerner Songer Incorporated","official_url":null},{"relationship":"Gas turbine, steam turbine, and generator OEM","name":"Siemens","official_url":"https://www.siemens-energy.com/"},{"relationship":"HRSG/steam boiler supplier","name":"Nooter/Eriksen","official_url":"https://cicgroup.com/nooter-eriksen/"},{"relationship":"HRSG repair contractor","name":"Bremco","official_url":null},{"relationship":"Reported gas supplier","name":"Spectra Energy","official_url":null}] — Calpine Finishing 545MW Ontelaunee Energy Center in Southeast Pen... · confidence: medium
- Parties: [{"relationship":"Owner and permittee/operator","name":"Ontelaunee Power Operating Company LLC","official_url":null},{"relationship":"Parent owner","name":"Vistra Corp.","official_url":"https://vistracorp.com/"},{"relationship":"Original developer/owner (historical)","name":"Calpine Corporation","official_url":"https://www.calpine.com/"},{"relationship":"Historical buyer/owner","name":"LS Power Equity Partners, LP","official_url":"https://www.lspower.com/"},{"relationship":"Design and engineering contractor","name":"Parsons Energy & Chemicals Group","official_url":null},{"relationship":"Construction contractor","name":"Kvaerner Songer Incorporated","official_url":null},{"relationship":"Gas turbine, steam turbine, and generator OEM","name":"Siemens","official_url":"https://www.siemens-energy.com/"},{"relationship":"HRSG/steam boiler supplier","name":"Nooter/Eriksen","official_url":"https://cicgroup.com/nooter-eriksen/"},{"relationship":"HRSG repair contractor","name":"Bremco","official_url":null},{"relationship":"Reported gas supplier","name":"Spectra Energy","official_url":null}] — Ontelaunee Energy Facility, US · confidence: medium
- Parties: [{"relationship":"Owner and permittee/operator","name":"Ontelaunee Power Operating Company LLC","official_url":null},{"relationship":"Parent owner","name":"Vistra Corp.","official_url":"https://vistracorp.com/"},{"relationship":"Original developer/owner (historical)","name":"Calpine Corporation","official_url":"https://www.calpine.com/"},{"relationship":"Historical buyer/owner","name":"LS Power Equity Partners, LP","official_url":"https://www.lspower.com/"},{"relationship":"Design and engineering contractor","name":"Parsons Energy & Chemicals Group","official_url":null},{"relationship":"Construction contractor","name":"Kvaerner Songer Incorporated","official_url":null},{"relationship":"Gas turbine, steam turbine, and generator OEM","name":"Siemens","official_url":"https://www.siemens-energy.com/"},{"relationship":"HRSG/steam boiler supplier","name":"Nooter/Eriksen","official_url":"https://cicgroup.com/nooter-eriksen/"},{"relationship":"HRSG repair contractor","name":"Bremco","official_url":null},{"relationship":"Reported gas supplier","name":"Spectra Energy","official_url":null}] — Source · confidence: medium
- Canonical name: Ontelaunee Energy Center — MBR | Index · confidence: high
- Identifiers.0: {"value":"55193","system":"EIA plant code"} — MBR | Index · confidence: high
- Identifiers.2: {"value":"12837","system":"FERC EIA record ID — CTG1"} — MBR | Index · confidence: high
- Identifiers.3: {"value":"12838","system":"FERC EIA record ID — CTG2"} — MBR | Index · confidence: high
- Identifiers.4: {"value":"12839","system":"FERC EIA record ID — STG"} — MBR | Index · confidence: high
- Identifiers.5: {"value":"CTG1 / CC01","system":"EIA generator ID / unit code"} — MBR | Index · confidence: high
- Identifiers.6: {"value":"CTG2 / CC01","system":"EIA generator ID / unit code"} — MBR | Index · confidence: high
- Identifiers.7: {"value":"STG / CC01","system":"EIA generator ID / unit code"} — MBR | Index · confidence: high
- Identifiers.12: {"value":"ONTELAUNEE CC","system":"PJM RPM capacity resource"} — Sheet1 · confidence: medium
- Parties.1: {"relationship":"Parent owner","name":"Vistra Corp.","official_url":"https://vistracorp.com/"} — Source · confidence: medium
- Parties.2: {"relationship":"Original developer/owner (historical)","name":"Calpine Corporation","official_url":"https://www.calpine.com/"} — Calpine to sell Ontelaunee Energy Center for $225 million · confidence: medium
- Parties.3: {"relationship":"Historical buyer/owner","name":"LS Power Equity Partners, LP","official_url":"https://www.lspower.com/"} — Calpine to sell Ontelaunee Energy Center for $225 million · confidence: medium
- Parties.4: {"relationship":"Design and engineering contractor","name":"Parsons Energy & Chemicals Group","official_url":null} — Calpine Finishing 545MW Ontelaunee Energy Center in Southeast Pen... · confidence: medium
- Parties.5: {"relationship":"Construction contractor","name":"Kvaerner Songer Incorporated","official_url":null} — Calpine Finishing 545MW Ontelaunee Energy Center in Southeast Pen... · confidence: medium
- Parties.6: {"relationship":"Gas turbine, steam turbine, and generator OEM","name":"Siemens","official_url":"https://www.siemens-energy.com/"} — Ontelaunee Energy Facility, US · confidence: medium
- Parties.7: {"relationship":"HRSG/steam boiler supplier","name":"Nooter/Eriksen","official_url":"https://cicgroup.com/nooter-eriksen/"} — Ontelaunee Energy Facility, US · confidence: medium
- Parties.8: {"relationship":"HRSG repair contractor","name":"Bremco","official_url":null} — Source · confidence: medium
- Parties.9: {"relationship":"Reported gas supplier","name":"Spectra Energy","official_url":null} — Ontelaunee Energy Facility, US · confidence: low
- Product url: https://www.siemens-energy.com/global/en/home/products-services/product/sgt6-5000f.html — SGT6-5000F Heavy-duty gas turbine (60 Hz) · confidence: medium
- Product url: https://www.siemens-energy.com/global/en/home/products-services/product/sgt6-5000f.html — Power plant profile: Ontelaunee Energy Facility, US · confidence: medium
- Kind: thermal — Pennsylvania – Vistra Corp Legislative Hub · confidence: high
- Equipment models.1: {"manufacturer_domain":"siemens-energy.com","product_url":"https://www.siemens-energy.com/global/en/home/products-services/product/utility-steam-turbines.html","count":1,"unit_mw":228,"name":"SST-5000 steam turbine"} — Utility steam turbines · confidence: medium
- Description: Ontelaunee Energy Center is a 728 MW natural-gas-fired combined-cycle plant in Berks County, Pennsylvania, at 5115 Pottsville Pike in Reading. It uses a 2×1 configuration with two Siemens gas turbines, one Siemens steam turbine and Nooter/Eriksen heat-recovery steam generators. Ontelaunee Power Operating Company LLC owns the facility, with Vistra Corp. as its parent owner. Calpine developed and commissioned the project; construction began in July 2000, commercial operation began in May 2002, Calpine sold the plant to LS Power in October 2005, LS Power transferred it to Dynegy in April 2007, and Vistra completed its merger with Dynegy in April 2018. — Ontelaunee Energy Facility, US · confidence: medium
- Description: Ontelaunee Energy Center is a 728 MW natural-gas-fired combined-cycle plant in Berks County, Pennsylvania, at 5115 Pottsville Pike in Reading. It uses a 2×1 configuration with two Siemens gas turbines, one Siemens steam turbine and Nooter/Eriksen heat-recovery steam generators. Ontelaunee Power Operating Company LLC owns the facility, with Vistra Corp. as its parent owner. Calpine developed and commissioned the project; construction began in July 2000, commercial operation began in May 2002, Calpine sold the plant to LS Power in October 2005, LS Power transferred it to Dynegy in April 2007, and Vistra completed its merger with Dynegy in April 2018. — Source · confidence: medium
- Quality notes: ["Current records identify the facility as 728 MW, while historical sources cite nominal capacities from 541 MW to 580 MW; these figures appear to reflect historical project descriptions or capacity revisions, not separate Ontelaunee assets.","Commercial-operation dating varies by source: project records state May 2002, while a later trade article describes operation as beginning late in 2002. May 2002 is used because it is the specific date in the project records.","The April 2007 Dynegy transaction was a broader LS Power portfolio merger. Its disclosed consideration was not allocated specifically to Ontelaunee.","No retirement or repowering milestone is documented in the cited history; plant records report the facility as operating through March 2026."] — Ontelaunee Energy Facility, US · confidence: medium
- Financing summary: Calpine’s sale of Ontelaunee to LS Power closed on 2005-10-06 for $225 million, less a reported $13.3 million working-capital adjustment and transaction costs; this was sale consideration, not project financing. On 2005-12-07, Ontelaunee entered a $125 million term loan to refinance part of the acquisition debt. On 2006-05-05, that loan was refinanced with a $100 million first-lien term loan and a $50 million second-lien term loan, with approximately $22 million distributed to the owners. On 2007-04-02, LS Power’s broader portfolio transaction with Dynegy closed; aggregate consideration consisted of 340 million Dynegy Class B shares, $100 million in cash and a $275 million promissory note, with no plant-specific allocation disclosed. — Source · confidence: high
- Financing summary: Calpine’s sale of Ontelaunee to LS Power closed on 2005-10-06 for $225 million, less a reported $13.3 million working-capital adjustment and transaction costs; this was sale consideration, not project financing. On 2005-12-07, Ontelaunee entered a $125 million term loan to refinance part of the acquisition debt. On 2006-05-05, that loan was refinanced with a $100 million first-lien term loan and a $50 million second-lien term loan, with approximately $22 million distributed to the owners. On 2007-04-02, LS Power’s broader portfolio transaction with Dynegy closed; aggregate consideration consisted of 340 million Dynegy Class B shares, $100 million in cash and a $275 million promissory note, with no plant-specific allocation disclosed. — Source · confidence: high
- Timeline: [{"event":"Development rights acquired","date":"1999","detail":"Calpine announced that it had acquired the rights to develop a 541 MW natural-gas-fired energy center in Ontelaunee Township."},{"event":"Construction began","date":"2000-07","detail":"Construction of the Ontelaunee project began in July 2000."},{"event":"Commercial operation","date":"2002-05","detail":"Project records identify May 2002 as the commissioning and commercial-operation date."},{"event":"Sale agreement announced","date":"2005-08","detail":"Calpine announced an agreement to sell the then-described 550 MW Ontelaunee Energy Center to LS Power Equity Partners for $225 million."},{"event":"Calpine-to-LS Power acquisition closed","date":"2005-10-06","detail":"LSP Ontelaunee Holding LLC acquired 100% of Ontelaunee Power Operating Company from a Calpine subsidiary for $225 million less a $13.3 million working-capital adjustment."},{"event":"Acquisition refinancing","date":"2005-12-07","detail":"Ontelaunee entered a $125 million term loan to refinance part of the debt incurred in the LS Power acquisition."},{"event":"Debt refinancing","date":"2006-05-05","detail":"The acquisition loan was refinanced with a $100 million first-lien term loan and a $50 million second-lien term loan; approximately $22 million was distributed to the owners."},{"event":"LS Power-to-Dynegy portfolio transaction closed","date":"2007-04-02","detail":"Dynegy completed its merger with the LS Power-contributed entities and acquired Ontelaunee as part of that broader portfolio transaction."},{"event":"HRSG repair and performance work","date":"2011","detail":"During a fall 2011 outage, Bremco performed major heat-recovery steam-generator work on both units."},{"event":"CCJ Pacesetter Plant Award","date":"2012","detail":"The Ontelaunee HRSG project received the CCJ 2012 Pacesetter Plant Award."},{"event":"Vistra-Dynegy merger completed","date":"2018-04-09","detail":"Vistra Energy completed its merger with Dynegy, placing the Dynegy generation portfolio, including Ontelaunee, within Vistra."},{"event":"Operating status","date":"2026-03","detail":"Plant records report Ontelaunee as operating, with generation data on file through March 2026."}] — Source · confidence: medium
- Timeline: [{"event":"Development rights acquired","date":"1999","detail":"Calpine announced that it had acquired the rights to develop a 541 MW natural-gas-fired energy center in Ontelaunee Township."},{"event":"Construction began","date":"2000-07","detail":"Construction of the Ontelaunee project began in July 2000."},{"event":"Commercial operation","date":"2002-05","detail":"Project records identify May 2002 as the commissioning and commercial-operation date."},{"event":"Sale agreement announced","date":"2005-08","detail":"Calpine announced an agreement to sell the then-described 550 MW Ontelaunee Energy Center to LS Power Equity Partners for $225 million."},{"event":"Calpine-to-LS Power acquisition closed","date":"2005-10-06","detail":"LSP Ontelaunee Holding LLC acquired 100% of Ontelaunee Power Operating Company from a Calpine subsidiary for $225 million less a $13.3 million working-capital adjustment."},{"event":"Acquisition refinancing","date":"2005-12-07","detail":"Ontelaunee entered a $125 million term loan to refinance part of the debt incurred in the LS Power acquisition."},{"event":"Debt refinancing","date":"2006-05-05","detail":"The acquisition loan was refinanced with a $100 million first-lien term loan and a $50 million second-lien term loan; approximately $22 million was distributed to the owners."},{"event":"LS Power-to-Dynegy portfolio transaction closed","date":"2007-04-02","detail":"Dynegy completed its merger with the LS Power-contributed entities and acquired Ontelaunee as part of that broader portfolio transaction."},{"event":"HRSG repair and performance work","date":"2011","detail":"During a fall 2011 outage, Bremco performed major heat-recovery steam-generator work on both units."},{"event":"CCJ Pacesetter Plant Award","date":"2012","detail":"The Ontelaunee HRSG project received the CCJ 2012 Pacesetter Plant Award."},{"event":"Vistra-Dynegy merger completed","date":"2018-04-09","detail":"Vistra Energy completed its merger with Dynegy, placing the Dynegy generation portfolio, including Ontelaunee, within Vistra."},{"event":"Operating status","date":"2026-03","detail":"Plant records report Ontelaunee as operating, with generation data on file through March 2026."}] — Source · confidence: medium
- Timeline: [{"event":"Development rights acquired","date":"1999","detail":"Calpine announced that it had acquired the rights to develop a 541 MW natural-gas-fired energy center in Ontelaunee Township."},{"event":"Construction began","date":"2000-07","detail":"Construction of the Ontelaunee project began in July 2000."},{"event":"Commercial operation","date":"2002-05","detail":"Project records identify May 2002 as the commissioning and commercial-operation date."},{"event":"Sale agreement announced","date":"2005-08","detail":"Calpine announced an agreement to sell the then-described 550 MW Ontelaunee Energy Center to LS Power Equity Partners for $225 million."},{"event":"Calpine-to-LS Power acquisition closed","date":"2005-10-06","detail":"LSP Ontelaunee Holding LLC acquired 100% of Ontelaunee Power Operating Company from a Calpine subsidiary for $225 million less a $13.3 million working-capital adjustment."},{"event":"Acquisition refinancing","date":"2005-12-07","detail":"Ontelaunee entered a $125 million term loan to refinance part of the debt incurred in the LS Power acquisition."},{"event":"Debt refinancing","date":"2006-05-05","detail":"The acquisition loan was refinanced with a $100 million first-lien term loan and a $50 million second-lien term loan; approximately $22 million was distributed to the owners."},{"event":"LS Power-to-Dynegy portfolio transaction closed","date":"2007-04-02","detail":"Dynegy completed its merger with the LS Power-contributed entities and acquired Ontelaunee as part of that broader portfolio transaction."},{"event":"HRSG repair and performance work","date":"2011","detail":"During a fall 2011 outage, Bremco performed major heat-recovery steam-generator work on both units."},{"event":"CCJ Pacesetter Plant Award","date":"2012","detail":"The Ontelaunee HRSG project received the CCJ 2012 Pacesetter Plant Award."},{"event":"Vistra-Dynegy merger completed","date":"2018-04-09","detail":"Vistra Energy completed its merger with Dynegy, placing the Dynegy generation portfolio, including Ontelaunee, within Vistra."},{"event":"Operating status","date":"2026-03","detail":"Plant records report Ontelaunee as operating, with generation data on file through March 2026."}] — Calpine To Sell Ontelaunee Energy Center · confidence: medium
- Timeline: [{"event":"Development rights acquired","date":"1999","detail":"Calpine announced that it had acquired the rights to develop a 541 MW natural-gas-fired energy center in Ontelaunee Township."},{"event":"Construction began","date":"2000-07","detail":"Construction of the Ontelaunee project began in July 2000."},{"event":"Commercial operation","date":"2002-05","detail":"Project records identify May 2002 as the commissioning and commercial-operation date."},{"event":"Sale agreement announced","date":"2005-08","detail":"Calpine announced an agreement to sell the then-described 550 MW Ontelaunee Energy Center to LS Power Equity Partners for $225 million."},{"event":"Calpine-to-LS Power acquisition closed","date":"2005-10-06","detail":"LSP Ontelaunee Holding LLC acquired 100% of Ontelaunee Power Operating Company from a Calpine subsidiary for $225 million less a $13.3 million working-capital adjustment."},{"event":"Acquisition refinancing","date":"2005-12-07","detail":"Ontelaunee entered a $125 million term loan to refinance part of the debt incurred in the LS Power acquisition."},{"event":"Debt refinancing","date":"2006-05-05","detail":"The acquisition loan was refinanced with a $100 million first-lien term loan and a $50 million second-lien term loan; approximately $22 million was distributed to the owners."},{"event":"LS Power-to-Dynegy portfolio transaction closed","date":"2007-04-02","detail":"Dynegy completed its merger with the LS Power-contributed entities and acquired Ontelaunee as part of that broader portfolio transaction."},{"event":"HRSG repair and performance work","date":"2011","detail":"During a fall 2011 outage, Bremco performed major heat-recovery steam-generator work on both units."},{"event":"CCJ Pacesetter Plant Award","date":"2012","detail":"The Ontelaunee HRSG project received the CCJ 2012 Pacesetter Plant Award."},{"event":"Vistra-Dynegy merger completed","date":"2018-04-09","detail":"Vistra Energy completed its merger with Dynegy, placing the Dynegy generation portfolio, including Ontelaunee, within Vistra."},{"event":"Operating status","date":"2026-03","detail":"Plant records report Ontelaunee as operating, with generation data on file through March 2026."}] — Source · confidence: medium
- Commercial parties: [{"relationship":"Current owner and permittee/operator","name":"Ontelaunee Power Operating Company LLC","detail":"Owns 100% of the listed Ontelaunee generators and is the facility’s operating entity.","official_url":null},{"relationship":"Parent owner","name":"Vistra Corp.","detail":"Became the parent owner through completion of its merger with Dynegy on 2018-04-09.","official_url":"https://www.vistracorp.com/"},{"relationship":"Original developer and historical owner","name":"Calpine Corporation","detail":"Acquired the project’s development rights in 1999, developed and commissioned the facility, and sold it to LS Power in October 2005.","official_url":"https://www.calpine.com/"},{"relationship":"Historical buyer and seller/contributor","name":"LS Power Equity Partners, LP","detail":"Acquired 100% of Ontelaunee Power Operating Company on 2005-10-06 and later contributed the facility to the LS Power portfolio transaction completed with Dynegy on 2007-04-02.","official_url":"https://www.lspower.com/"},{"relationship":"Historical buyer and owner","name":"Dynegy Inc.","detail":"Acquired Ontelaunee through the April 2007 merger with LS Power-contributed entities and owned the facility until Vistra completed its merger with Dynegy in April 2018.","official_url":null},{"relationship":"Design and engineering contractor","name":"Parsons Energy & Chemicals Group","detail":"Designed and engineered the Ontelaunee project during its development.","official_url":null},{"relationship":"Construction contractor","name":"Kvaerner Songer Incorporated","detail":"Constructed the natural-gas-fired combined-cycle facility for Calpine.","official_url":null},{"relationship":"Gas turbine, steam turbine and generator OEM","name":"Siemens","detail":"Supplied two SGT6-5000F gas turbines, one SST-5000 steam turbine and the project’s electric generator equipment.","official_url":"https://www.siemens-energy.com/"},{"relationship":"HRSG/steam-boiler supplier","name":"Nooter/Eriksen","detail":"Supplied the project’s steam boilers/heat-recovery steam generators and participated in later HRSG design work.","official_url":"https://cicgroup.com/nooter-eriksen/"},{"relationship":"HRSG repair contractor","name":"Bremco","detail":"Performed the major 2011 HRSG repair and modification work that received the CCJ 2012 Pacesetter Plant Award.","official_url":"https://www.bremco.com/"},{"relationship":"Historical gas supplier","name":"Spectra Energy","detail":"Identified in project records as the historical natural-gas supplier.","official_url":null}] — Source · confidence: medium
- Commercial parties: [{"relationship":"Current owner and permittee/operator","name":"Ontelaunee Power Operating Company LLC","detail":"Owns 100% of the listed Ontelaunee generators and is the facility’s operating entity.","official_url":null},{"relationship":"Parent owner","name":"Vistra Corp.","detail":"Became the parent owner through completion of its merger with Dynegy on 2018-04-09.","official_url":"https://www.vistracorp.com/"},{"relationship":"Original developer and historical owner","name":"Calpine Corporation","detail":"Acquired the project’s development rights in 1999, developed and commissioned the facility, and sold it to LS Power in October 2005.","official_url":"https://www.calpine.com/"},{"relationship":"Historical buyer and seller/contributor","name":"LS Power Equity Partners, LP","detail":"Acquired 100% of Ontelaunee Power Operating Company on 2005-10-06 and later contributed the facility to the LS Power portfolio transaction completed with Dynegy on 2007-04-02.","official_url":"https://www.lspower.com/"},{"relationship":"Historical buyer and owner","name":"Dynegy Inc.","detail":"Acquired Ontelaunee through the April 2007 merger with LS Power-contributed entities and owned the facility until Vistra completed its merger with Dynegy in April 2018.","official_url":null},{"relationship":"Design and engineering contractor","name":"Parsons Energy & Chemicals Group","detail":"Designed and engineered the Ontelaunee project during its development.","official_url":null},{"relationship":"Construction contractor","name":"Kvaerner Songer Incorporated","detail":"Constructed the natural-gas-fired combined-cycle facility for Calpine.","official_url":null},{"relationship":"Gas turbine, steam turbine and generator OEM","name":"Siemens","detail":"Supplied two SGT6-5000F gas turbines, one SST-5000 steam turbine and the project’s electric generator equipment.","official_url":"https://www.siemens-energy.com/"},{"relationship":"HRSG/steam-boiler supplier","name":"Nooter/Eriksen","detail":"Supplied the project’s steam boilers/heat-recovery steam generators and participated in later HRSG design work.","official_url":"https://cicgroup.com/nooter-eriksen/"},{"relationship":"HRSG repair contractor","name":"Bremco","detail":"Performed the major 2011 HRSG repair and modification work that received the CCJ 2012 Pacesetter Plant Award.","official_url":"https://www.bremco.com/"},{"relationship":"Historical gas supplier","name":"Spectra Energy","detail":"Identified in project records as the historical natural-gas supplier.","official_url":null}] — Source · confidence: medium
- Commercial parties: [{"relationship":"Current owner and permittee/operator","name":"Ontelaunee Power Operating Company LLC","detail":"Owns 100% of the listed Ontelaunee generators and is the facility’s operating entity.","official_url":null},{"relationship":"Parent owner","name":"Vistra Corp.","detail":"Became the parent owner through completion of its merger with Dynegy on 2018-04-09.","official_url":"https://www.vistracorp.com/"},{"relationship":"Original developer and historical owner","name":"Calpine Corporation","detail":"Acquired the project’s development rights in 1999, developed and commissioned the facility, and sold it to LS Power in October 2005.","official_url":"https://www.calpine.com/"},{"relationship":"Historical buyer and seller/contributor","name":"LS Power Equity Partners, LP","detail":"Acquired 100% of Ontelaunee Power Operating Company on 2005-10-06 and later contributed the facility to the LS Power portfolio transaction completed with Dynegy on 2007-04-02.","official_url":"https://www.lspower.com/"},{"relationship":"Historical buyer and owner","name":"Dynegy Inc.","detail":"Acquired Ontelaunee through the April 2007 merger with LS Power-contributed entities and owned the facility until Vistra completed its merger with Dynegy in April 2018.","official_url":null},{"relationship":"Design and engineering contractor","name":"Parsons Energy & Chemicals Group","detail":"Designed and engineered the Ontelaunee project during its development.","official_url":null},{"relationship":"Construction contractor","name":"Kvaerner Songer Incorporated","detail":"Constructed the natural-gas-fired combined-cycle facility for Calpine.","official_url":null},{"relationship":"Gas turbine, steam turbine and generator OEM","name":"Siemens","detail":"Supplied two SGT6-5000F gas turbines, one SST-5000 steam turbine and the project’s electric generator equipment.","official_url":"https://www.siemens-energy.com/"},{"relationship":"HRSG/steam-boiler supplier","name":"Nooter/Eriksen","detail":"Supplied the project’s steam boilers/heat-recovery steam generators and participated in later HRSG design work.","official_url":"https://cicgroup.com/nooter-eriksen/"},{"relationship":"HRSG repair contractor","name":"Bremco","detail":"Performed the major 2011 HRSG repair and modification work that received the CCJ 2012 Pacesetter Plant Award.","official_url":"https://www.bremco.com/"},{"relationship":"Historical gas supplier","name":"Spectra Energy","detail":"Identified in project records as the historical natural-gas supplier.","official_url":null}] — Ontelaunee Energy Facility, US · confidence: medium
- Quality notes.0: Current records identify the facility as 728 MW, while historical sources cite nominal capacities from 541 MW to 580 MW; these figures appear to reflect historical project descriptions or capacity revisions, not separate Ontelaunee assets. — Ontelaunee Energy Facility, US · confidence: medium
- Quality notes.1: Commercial-operation dating varies by source: project records state May 2002, while a later trade article describes operation as beginning late in 2002. May 2002 is used because it is the specific date in the project records. — Source · confidence: medium
- Quality notes.2: The April 2007 Dynegy transaction was a broader LS Power portfolio merger. Its disclosed consideration was not allocated specifically to Ontelaunee. — Source · confidence: high
- Quality notes.2: The April 2007 Dynegy transaction was a broader LS Power portfolio merger. Its disclosed consideration was not allocated specifically to Ontelaunee. — Source · confidence: high
- Timeline.0: {"event":"Development rights acquired","date":"1999","detail":"Calpine announced that it had acquired the rights to develop a 541 MW natural-gas-fired energy center in Ontelaunee Township."} — Source · confidence: high
- Timeline.1: {"event":"Construction began","date":"2000-07","detail":"Construction of the Ontelaunee project began in July 2000."} — Source · confidence: high
- Timeline.2: {"event":"Commercial operation","date":"2002-05","detail":"Project records identify May 2002 as the commissioning and commercial-operation date."} — Source · confidence: medium
- Timeline.3: {"event":"Sale agreement announced","date":"2005-08","detail":"Calpine announced an agreement to sell the then-described 550 MW Ontelaunee Energy Center to LS Power Equity Partners for $225 million."} — Calpine To Sell Ontelaunee Energy Center · confidence: high
- Timeline.6: {"event":"Debt refinancing","date":"2006-05-05","detail":"The acquisition loan was refinanced with a $100 million first-lien term loan and a $50 million second-lien term loan; approximately $22 million was distributed to the owners."} — Source · confidence: high
- Timeline.8: {"event":"HRSG repair and performance work","date":"2011","detail":"During a fall 2011 outage, Bremco performed major heat-recovery steam-generator work on both units."} — Source · confidence: medium
- Commercial parties.1: {"relationship":"Parent owner","name":"Vistra Corp.","detail":"Became the parent owner through completion of its merger with Dynegy on 2018-04-09.","official_url":"https://www.vistracorp.com/"} — Source · confidence: medium
- Commercial parties.2: {"relationship":"Original developer and historical owner","name":"Calpine Corporation","detail":"Acquired the project’s development rights in 1999, developed and commissioned the facility, and sold it to LS Power in October 2005.","official_url":"https://www.calpine.com/"} — Source · confidence: high
- Commercial parties.7: {"relationship":"Gas turbine, steam turbine and generator OEM","name":"Siemens","detail":"Supplied two SGT6-5000F gas turbines, one SST-5000 steam turbine and the project’s electric generator equipment.","official_url":"https://www.siemens-energy.com/"} — Ontelaunee Energy Facility, US · confidence: high
- Commercial parties.8: {"relationship":"HRSG/steam-boiler supplier","name":"Nooter/Eriksen","detail":"Supplied the project’s steam boilers/heat-recovery steam generators and participated in later HRSG design work.","official_url":"https://cicgroup.com/nooter-eriksen/"} — Ontelaunee Energy Facility, US · confidence: high
- Commercial parties.10: {"relationship":"Historical gas supplier","name":"Spectra Energy","detail":"Identified in project records as the historical natural-gas supplier.","official_url":null} — Ontelaunee Energy Facility, US · confidence: medium

## Timeline

- 2005-08 — Sale agreement announced
  Calpine announced an agreement to sell the then-described 550 MW Ontelaunee Energy Center to LS Power Equity Partners for $225 million.
  Source: Calpine To Sell Ontelaunee Energy Center (https://www.poweronline.com/doc/calpine-to-sell-ontelaunee-energy-center-0001)
- 2012 — CCJ Pacesetter Plant Award
  The Ontelaunee HRSG project received the CCJ 2012 Pacesetter Plant Award.
  Source: Source (https://www.ccj-online.com/3q-2012/ontelaunee-energy-center/)

## Sources

- [Source](https://hub.vistracorp.com/documents/state-profiles/VST-in-PA.pdf?_t=1776261566) — hub.vistracorp.com · tier other
- [MBR | Index](https://mbrweb.ferc.gov/SearchlkpEIA/Index?page=257) — mbrweb.ferc.gov · tier regulatory
- [Sheet1](https://www.pjm.com/-/media/DotCom/markets-ops/rpm/rpm-auction-info/2025-2026/2025-2026-rpm-existing-resource-list-post.xlsx) — pjm.com · tier other
- [Calpine to sell Ontelaunee Energy Center for $225 million](https://www.renewableenergyworld.com/hydro-power/dams-civil-structures/calpine-to-sell-ontelaunee-energy-center-for-225-million/) — renewableenergyworld.com · tier other
- [Calpine Finishing 545MW Ontelaunee Energy Center in Southeast Pen...](https://www.industrialinfo.com/news/article/calpine-finishing-545mw-ontelaunee-energy-center-in-southeast-pennsylvania--7173) — industrialinfo.com · tier other
- [Ontelaunee Energy Facility, US](https://www.power-technology.com/marketdata/ontelaunee-energy-facility-us/) — power-technology.com · tier other
- [Source](https://www.ccj-online.com/3q-2012/ontelaunee-energy-center/) — ccj-online.com · tier other
- [Source](https://www.sec.gov/Archives/edgar/data/916457/000089161802001569/f80168e10-k.htm) — sec.gov · tier regulatory
- [Source](https://power-technology.com/marketdata/ontelaunee-energy-facility-us) — power-technology.com · tier other
- [Power plant profile: Ontelaunee Energy Facility, US](https://www.power-technology.com/data-insights/power-plant-profile-ontelaunee-energy-facility-us/) — power-technology.com · tier other
- [Pennsylvania – Vistra Corp Legislative Hub](https://hub.vistracorp.com/state-and-federal/pennsylvania/) — hub.vistracorp.com · tier other
- [1347896[06-05100]_Issued_v2.pdf](https://files.dep.state.pa.us/air/AirQuality/AQPortalFiles/Permits/PermitDocuments/1347896%5B06-05100%5D_Issued_v2.pdf) — files.dep.state.pa.us · tier other
- [SGT6-5000F Heavy-duty gas turbine (60 Hz)](https://www.siemens-energy.com/global/en/home/products-services/product/sgt6-5000f.html) — siemens-energy.com · tier other
- [Utility steam turbines](https://www.siemens-energy.com/global/en/home/products-services/product/utility-steam-turbines.html) — siemens-energy.com · tier other
- [Source](https://www.sec.gov/Archives/edgar/data/1105055/000119312508041975/d10k.htm) — sec.gov · tier regulatory
- [Source](https://www.sec.gov/Archives/edgar/data/1379895/000119312507029272/d424b3.htm) — sec.gov · tier regulatory
- [Calpine To Sell Ontelaunee Energy Center](https://www.poweronline.com/doc/calpine-to-sell-ontelaunee-energy-center-0001) — poweronline.com · tier other
- [Source](https://gem.wiki/Ontelaunee_energy_center) — gem.wiki · tier other

## Data quality

- Current records identify the facility as 728 MW, while historical sources cite nominal capacities from 541 MW to 580 MW; these figures appear to reflect historical project descriptions or capacity revisions, not separate Ontelaunee assets. Commercial-operation dating varies by source: project records state May 2002, while a later trade article describes operation as beginning late in 2002. May 2002 is used because it is the specific date in the project records. The April 2007 Dynegy transaction was a broader LS Power portfolio merger. Its disclosed consideration was not allocated specifically to Ontelaunee. No retirement or repowering milestone is documented in the cited history; plant records report the facility as operating through March 2026.

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Source: Ask the Grid — https://askthegrid.com/