# Metcalf Energy Center

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

Metcalf Energy Center is a natural gas-fired power facility with 635 MW of EIA-reported nameplate capacity in Santa Clara County, California, registered as EIA Plant ID 55393. Calpine Corporation owns and operates the plant. The project was also developed to address generation deficiency in the Bay Area, particularly around San Jose.

## Key facts

- Technology: Natural Gas Fired Combined Cycle
- Power capacity: 635 MW
- Operating status: operating

## Grid and market context

- ISO/RTO: CAISO
- Balancing authority: CAISO (CISO)
- Substation: PG&E Metcalf substation
- Point of interconnection: PG&E Metcalf substation
- Transmission owner: Pacific Gas and Electric Company (PG&E)
- Interconnection voltage: 230 kV

## Source-backed facts

- Owner logo domain: calpine.com — Clean Natural Gas - Calpine · confidence: medium
- Identifiers: [{"value":"55393","system":"EIA plant code"},{"value":"14558; 14559; 14560","system":"EIA generator record IDs"},{"value":"CTG1; CTG2; STG1","system":"EIA generator IDs"},{"value":"CC1","system":"EIA unit code"},{"value":"G0794","system":"California Energy Commission plant ID"},{"value":"100343","system":"California ARB MRR ID"},{"value":"METEC_2_PL1X3","system":"CAISO resource ID"},{"value":"99-AFC-03","system":"CEC docket"},{"value":"ER05-67-000","system":"FERC market-based-rate docket"},{"value":"ER25-585-000","system":"FERC/CAISO LGIA docket"},{"value":"8545","system":"CAISO service agreement"},{"value":"489","system":"PG&E transmission-owner service agreement"},{"value":"CISO","system":"FERC market/balancing authority area"}] — MBR | Index · confidence: medium
- Identifiers: [{"value":"55393","system":"EIA plant code"},{"value":"14558; 14559; 14560","system":"EIA generator record IDs"},{"value":"CTG1; CTG2; STG1","system":"EIA generator IDs"},{"value":"CC1","system":"EIA unit code"},{"value":"G0794","system":"California Energy Commission plant ID"},{"value":"100343","system":"California ARB MRR ID"},{"value":"METEC_2_PL1X3","system":"CAISO resource ID"},{"value":"99-AFC-03","system":"CEC docket"},{"value":"ER05-67-000","system":"FERC market-based-rate docket"},{"value":"ER25-585-000","system":"FERC/CAISO LGIA docket"},{"value":"8545","system":"CAISO service agreement"},{"value":"489","system":"PG&E transmission-owner service agreement"},{"value":"CISO","system":"FERC market/balancing authority area"}] — may-1-2026-final-2027-local-capacity-technical-report-and... · confidence: medium
- Identifiers: [{"value":"55393","system":"EIA plant code"},{"value":"14558; 14559; 14560","system":"EIA generator record IDs"},{"value":"CTG1; CTG2; STG1","system":"EIA generator IDs"},{"value":"CC1","system":"EIA unit code"},{"value":"G0794","system":"California Energy Commission plant ID"},{"value":"100343","system":"California ARB MRR ID"},{"value":"METEC_2_PL1X3","system":"CAISO resource ID"},{"value":"99-AFC-03","system":"CEC docket"},{"value":"ER05-67-000","system":"FERC market-based-rate docket"},{"value":"ER25-585-000","system":"FERC/CAISO LGIA docket"},{"value":"8545","system":"CAISO service agreement"},{"value":"489","system":"PG&E transmission-owner service agreement"},{"value":"CISO","system":"FERC market/balancing authority area"}] — Metcalf Energy Center | California Energy Commission · confidence: medium
- Official project url: https://www.calpine.com/clean-and-reliable-power/our-assets/clean-natural-gas/ — Clean Natural Gas - Calpine · confidence: high
- Description: Metcalf Energy Center is a natural-gas-fired combined-cycle power plant in southern San Jose, Santa Clara County. FERC's EIA record lists three generators—CTG1 at 200 MW, CTG2 at 200 MW, and STG1 at 235 MW—for a combined 635 MW nameplate capacity, with operation beginning in June 2005. The California Energy Commission identifies the project as a nominal 600 MW facility that began commercial operation on May 25, 2005, and states that a 30 MW turbine upgrade was completed in May 2021. — Metcalf Energy Center | California Energy Commission · confidence: medium
- Description: Metcalf Energy Center is a natural-gas-fired combined-cycle power plant in southern San Jose, Santa Clara County. FERC's EIA record lists three generators—CTG1 at 200 MW, CTG2 at 200 MW, and STG1 at 235 MW—for a combined 635 MW nameplate capacity, with operation beginning in June 2005. The California Energy Commission identifies the project as a nominal 600 MW facility that began commercial operation on May 25, 2005, and states that a 30 MW turbine upgrade was completed in May 2021. — MBR | Index · confidence: medium
- Canonical name: Metcalf Energy Center — Metcalf Energy Center | California Energy Commission · confidence: high
- Identifiers.0: {"value":"55393","system":"EIA plant code"} — MBR | Index · confidence: high
- Identifiers.1: {"value":"14558; 14559; 14560","system":"EIA generator record IDs"} — MBR | Index · confidence: high
- Identifiers.2: {"value":"CTG1; CTG2; STG1","system":"EIA generator IDs"} — MBR | Index · confidence: high
- Identifiers.3: {"value":"CC1","system":"EIA unit code"} — MBR | Index · confidence: high
- Identifiers.6: {"value":"METEC_2_PL1X3","system":"CAISO resource ID"} — may-1-2026-final-2027-local-capacity-technical-report-and... · confidence: high
- Identifiers.7: {"value":"99-AFC-03","system":"CEC docket"} — Metcalf Energy Center | California Energy Commission · confidence: high
- Identifiers.11: {"value":"489","system":"PG&E transmission-owner service agreement"} — Source · confidence: high
- Parties.0: {"relationship":"Asset entity / registered interconnection party","name":"Metcalf Energy Center, LLC","official_url":null} — Source · confidence: high
- Parties.1: {"relationship":"Owner / operator","name":"Calpine Corporation","official_url":"https://www.calpine.com/"} — Clean Natural Gas - Calpine · confidence: medium
- Parties.1: {"relationship":"Owner / operator","name":"Calpine Corporation","official_url":"https://www.calpine.com/"} — Source · confidence: medium
- Parties.3: {"relationship":"Original joint developer","name":"Bechtel Enterprises","official_url":"https://www.bechtel.com/"} — Construction To Begin On 600-megawatt Metcalf Energy Center - Bechtel · confidence: high
- Parties.5: {"relationship":"ISO / market operator and interconnection counterparty","name":"California Independent System Operator Corporation","official_url":"https://www.caiso.com/"} — Source · confidence: high
- Interconnection: PG&E Metcalf substation; the plant has a 230-kV switchyard and approximately 200 feet of new 230-kV transmission line. PG&E is the transmission owner and CAISO is the ISO/interconnection counterparty. — Source · confidence: medium
- Unit configuration: Natural-gas-fired combined-cycle (CC1): two 200-MW combustion-turbine generators (CTG1 and CTG2), two heat-recovery steam generators with duct burners, and one 235-MW condensing steam-turbine generator (STG1). — Source · confidence: medium
- Commercial operation date: 2005-05-25 — Source · confidence: high
- Power mw: 635 — Source · confidence: medium
- Unit count: 3 — Source · confidence: high
- Construction scope: The Metcalf Energy Center is a natural-gas combined-cycle plant comprising two 200 MW combustion/gas turbines, two heat-recovery steam generators with duct burners, and one condensing steam-turbine generator rated up to 235 MW. The physical scope also includes a 230 kV switchyard, approximately 200 feet of new 230 kV transmission line, an approximately one-mile 16-inch natural-gas pipeline, and recycled-water facilities supplied through a 20-inch, 7.3-mile pipeline. Additional temperature sensors, instrumentation, controls, piping, and replacement hot-gas-path components were installed during the upgrade completed in May 2021. — Metcalf Energy Center, San Jose, California - Power Technology · confidence: medium
- Construction scope: The Metcalf Energy Center is a natural-gas combined-cycle plant comprising two 200 MW combustion/gas turbines, two heat-recovery steam generators with duct burners, and one condensing steam-turbine generator rated up to 235 MW. The physical scope also includes a 230 kV switchyard, approximately 200 feet of new 230 kV transmission line, an approximately one-mile 16-inch natural-gas pipeline, and recycled-water facilities supplied through a 20-inch, 7.3-mile pipeline. Additional temperature sensors, instrumentation, controls, piping, and replacement hot-gas-path components were installed during the upgrade completed in May 2021. — Source · confidence: medium
- 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
- Kind: thermal — Source · confidence: high
- Manufacturer domain: siemens-energy.com — SGT6-5000F Heavy-duty gas turbine (60 Hz) · confidence: medium
- Product family: SGT6-5000F — SGT6-5000F Heavy-duty gas turbine (60 Hz) · confidence: medium
- Manufacturer name: Siemens — Link to Filing · confidence: medium
- Manufacturer name: Siemens — SGT6-5000F Heavy-duty gas turbine (60 Hz) · confidence: medium
- Significance: Bechtel described Metcalf as the first major power plant built in Silicon Valley. The project was also developed to address generation deficiency in the Bay Area, particularly around San Jose. — Construction To Begin On 600-megawatt Metcalf Energy Center - Bechtel · confidence: high
- Description: Metcalf Energy Center is a natural-gas-fired combined-cycle plant in southern San Jose, Santa Clara County, with a 230-kV switchyard and approximately 200 feet of new 230-kV transmission line. FERC/EIA records list CTG1 at 200 MW, CTG2 at 200 MW, and STG1 at 235 MW, while the California Energy Commission describes the project as nominally 600 MW. Metcalf Energy Center, LLC is the project entity; Calpine is identified as the owner/operator, and Constellation became Calpine’s parent after completing its acquisition of Calpine in January 2026. The CEC certified the project in September 2001, commercial operation began on May 25, 2005, and turbine equipment upgrades completed in May 2021 increased output by 30 MW. — Metcalf Energy Center | California Energy Commission · confidence: medium
- Description: Metcalf Energy Center is a natural-gas-fired combined-cycle plant in southern San Jose, Santa Clara County, with a 230-kV switchyard and approximately 200 feet of new 230-kV transmission line. FERC/EIA records list CTG1 at 200 MW, CTG2 at 200 MW, and STG1 at 235 MW, while the California Energy Commission describes the project as nominally 600 MW. Metcalf Energy Center, LLC is the project entity; Calpine is identified as the owner/operator, and Constellation became Calpine’s parent after completing its acquisition of Calpine in January 2026. The CEC certified the project in September 2001, commercial operation began on May 25, 2005, and turbine equipment upgrades completed in May 2021 increased output by 30 MW. — Source · confidence: medium
- Description: Metcalf Energy Center is a natural-gas-fired combined-cycle plant in southern San Jose, Santa Clara County, with a 230-kV switchyard and approximately 200 feet of new 230-kV transmission line. FERC/EIA records list CTG1 at 200 MW, CTG2 at 200 MW, and STG1 at 235 MW, while the California Energy Commission describes the project as nominally 600 MW. Metcalf Energy Center, LLC is the project entity; Calpine is identified as the owner/operator, and Constellation became Calpine’s parent after completing its acquisition of Calpine in January 2026. The CEC certified the project in September 2001, commercial operation began on May 25, 2005, and turbine equipment upgrades completed in May 2021 increased output by 30 MW. — Source · confidence: medium
- Quality notes: ["The CEC lists the facility as operational as of the current research date; no retirement or decommissioning date is identified in the cited records.","Capacity is reported on different bases: the CEC states nominal 600 MW, while the FERC/EIA generator records total 635 MW from 200 MW, 200 MW, and 235 MW units.","The August 2003 and September 2004 events are documented as CEC-approved ownership transfers between Metcalf Energy Center, LLC and Calpine Corporation. The cited records do not disclose an arm’s-length asset-sale price or consideration.","The January 2005 $100 million facility was project/construction financing. It should not be conflated with ECP’s 2017-2018 Calpine take-private or Constellation’s 2026 corporate acquisition of Calpine."] — Metcalf Energy Center · confidence: medium
- Quality notes: ["The CEC lists the facility as operational as of the current research date; no retirement or decommissioning date is identified in the cited records.","Capacity is reported on different bases: the CEC states nominal 600 MW, while the FERC/EIA generator records total 635 MW from 200 MW, 200 MW, and 235 MW units.","The August 2003 and September 2004 events are documented as CEC-approved ownership transfers between Metcalf Energy Center, LLC and Calpine Corporation. The cited records do not disclose an arm’s-length asset-sale price or consideration.","The January 2005 $100 million facility was project/construction financing. It should not be conflated with ECP’s 2017-2018 Calpine take-private or Constellation’s 2026 corporate acquisition of Calpine."] — Source · confidence: medium
- Quality notes: ["The CEC lists the facility as operational as of the current research date; no retirement or decommissioning date is identified in the cited records.","Capacity is reported on different bases: the CEC states nominal 600 MW, while the FERC/EIA generator records total 635 MW from 200 MW, 200 MW, and 235 MW units.","The August 2003 and September 2004 events are documented as CEC-approved ownership transfers between Metcalf Energy Center, LLC and Calpine Corporation. The cited records do not disclose an arm’s-length asset-sale price or consideration.","The January 2005 $100 million facility was project/construction financing. It should not be conflated with ECP’s 2017-2018 Calpine take-private or Constellation’s 2026 corporate acquisition of Calpine."] — Source · confidence: medium
- Timeline: [{"event":"Application and development","date":"1999-04","detail":"Calpine submitted an application to the California Energy Commission to build, own, and operate Metcalf Energy Center."},{"event":"CEC certification and construction launch","date":"2001-09-24","detail":"The CEC certified the project, and Bechtel announced that construction was expected to begin on the 600-MW facility."},{"event":"Construction","date":"2002-06","detail":"Construction began, according to the project profile."},{"event":"Ownership transfer to Calpine","date":"2003-08-06","detail":"The CEC approved transfer of ownership from Metcalf Energy Center, LLC to Calpine Corporation. The record documents a regulatory ownership transfer but does not disclose sale consideration."},{"event":"Ownership transfer back to Metcalf Energy Center, LLC","date":"2004-09-13","detail":"The CEC approved transfer of ownership from Calpine Corporation to Metcalf Energy Center, LLC. The record does not disclose sale consideration."},{"event":"Project financing","date":"2005-01-28","detail":"Metcalf Energy Center, LLC obtained a $100 million non-recourse credit facility from ING Capital LLC and Bayerische Landesbank’s New York operations to complete construction."},{"event":"Commercial operation","date":"2005-05-25","detail":"The CEC records the start of commercial operation."},{"event":"Calpine take-private","date":"2018-03","detail":"Energy Capital Partners completed its approximately $17 billion take-private of Calpine. This was a corporate portfolio transaction rather than a disclosed project-specific Metcalf sale."},{"event":"Output expansion","date":"2021-05","detail":"CEC-approved equipment upgrades, including hot-gas-path components, sensors, controls, and piping, were completed and increased output by 30 MW by reducing turbine heat rate."},{"event":"Current parent acquisition","date":"2026-01-07","detail":"Constellation completed its acquisition of Calpine from Energy Capital Partners. The transaction transferred Calpine’s portfolio, including its Metcalf business, to Constellation; no separate Metcalf purchase price was disclosed."}] — Metcalf Energy Center | California Energy Commission · confidence: medium
- Timeline: [{"event":"Application and development","date":"1999-04","detail":"Calpine submitted an application to the California Energy Commission to build, own, and operate Metcalf Energy Center."},{"event":"CEC certification and construction launch","date":"2001-09-24","detail":"The CEC certified the project, and Bechtel announced that construction was expected to begin on the 600-MW facility."},{"event":"Construction","date":"2002-06","detail":"Construction began, according to the project profile."},{"event":"Ownership transfer to Calpine","date":"2003-08-06","detail":"The CEC approved transfer of ownership from Metcalf Energy Center, LLC to Calpine Corporation. The record documents a regulatory ownership transfer but does not disclose sale consideration."},{"event":"Ownership transfer back to Metcalf Energy Center, LLC","date":"2004-09-13","detail":"The CEC approved transfer of ownership from Calpine Corporation to Metcalf Energy Center, LLC. The record does not disclose sale consideration."},{"event":"Project financing","date":"2005-01-28","detail":"Metcalf Energy Center, LLC obtained a $100 million non-recourse credit facility from ING Capital LLC and Bayerische Landesbank’s New York operations to complete construction."},{"event":"Commercial operation","date":"2005-05-25","detail":"The CEC records the start of commercial operation."},{"event":"Calpine take-private","date":"2018-03","detail":"Energy Capital Partners completed its approximately $17 billion take-private of Calpine. This was a corporate portfolio transaction rather than a disclosed project-specific Metcalf sale."},{"event":"Output expansion","date":"2021-05","detail":"CEC-approved equipment upgrades, including hot-gas-path components, sensors, controls, and piping, were completed and increased output by 30 MW by reducing turbine heat rate."},{"event":"Current parent acquisition","date":"2026-01-07","detail":"Constellation completed its acquisition of Calpine from Energy Capital Partners. The transaction transferred Calpine’s portfolio, including its Metcalf business, to Constellation; no separate Metcalf purchase price was disclosed."}] — e10vk · confidence: medium
- Timeline: [{"event":"Application and development","date":"1999-04","detail":"Calpine submitted an application to the California Energy Commission to build, own, and operate Metcalf Energy Center."},{"event":"CEC certification and construction launch","date":"2001-09-24","detail":"The CEC certified the project, and Bechtel announced that construction was expected to begin on the 600-MW facility."},{"event":"Construction","date":"2002-06","detail":"Construction began, according to the project profile."},{"event":"Ownership transfer to Calpine","date":"2003-08-06","detail":"The CEC approved transfer of ownership from Metcalf Energy Center, LLC to Calpine Corporation. The record documents a regulatory ownership transfer but does not disclose sale consideration."},{"event":"Ownership transfer back to Metcalf Energy Center, LLC","date":"2004-09-13","detail":"The CEC approved transfer of ownership from Calpine Corporation to Metcalf Energy Center, LLC. The record does not disclose sale consideration."},{"event":"Project financing","date":"2005-01-28","detail":"Metcalf Energy Center, LLC obtained a $100 million non-recourse credit facility from ING Capital LLC and Bayerische Landesbank’s New York operations to complete construction."},{"event":"Commercial operation","date":"2005-05-25","detail":"The CEC records the start of commercial operation."},{"event":"Calpine take-private","date":"2018-03","detail":"Energy Capital Partners completed its approximately $17 billion take-private of Calpine. This was a corporate portfolio transaction rather than a disclosed project-specific Metcalf sale."},{"event":"Output expansion","date":"2021-05","detail":"CEC-approved equipment upgrades, including hot-gas-path components, sensors, controls, and piping, were completed and increased output by 30 MW by reducing turbine heat rate."},{"event":"Current parent acquisition","date":"2026-01-07","detail":"Constellation completed its acquisition of Calpine from Energy Capital Partners. The transaction transferred Calpine’s portfolio, including its Metcalf business, to Constellation; no separate Metcalf purchase price was disclosed."}] — Source · confidence: medium
- Quality notes.0: The CEC lists the facility as operational as of the current research date; no retirement or decommissioning date is identified in the cited records. — Metcalf Energy Center · confidence: medium
- Quality notes.1: Capacity is reported on different bases: the CEC states nominal 600 MW, while the FERC/EIA generator records total 635 MW from 200 MW, 200 MW, and 235 MW units. — Source · confidence: medium
- Quality notes.1: Capacity is reported on different bases: the CEC states nominal 600 MW, while the FERC/EIA generator records total 635 MW from 200 MW, 200 MW, and 235 MW units. — Metcalf Energy Center | California Energy Commission · confidence: medium
- Quality notes.2: The August 2003 and September 2004 events are documented as CEC-approved ownership transfers between Metcalf Energy Center, LLC and Calpine Corporation. The cited records do not disclose an arm’s-length asset-sale price or consideration. — Metcalf Energy Center | California Energy Commission · confidence: high
- Quality notes.3: The January 2005 $100 million facility was project/construction financing. It should not be conflated with ECP’s 2017-2018 Calpine take-private or Constellation’s 2026 corporate acquisition of Calpine. — e10vk · confidence: high
- Quality notes.3: The January 2005 $100 million facility was project/construction financing. It should not be conflated with ECP’s 2017-2018 Calpine take-private or Constellation’s 2026 corporate acquisition of Calpine. — Source · confidence: high
- Timeline.1: {"event":"CEC certification and construction launch","date":"2001-09-24","detail":"The CEC certified the project, and Bechtel announced that construction was expected to begin on the 600-MW facility."} — Metcalf Energy Center | California Energy Commission · confidence: medium
- Timeline.3: {"event":"Ownership transfer to Calpine","date":"2003-08-06","detail":"The CEC approved transfer of ownership from Metcalf Energy Center, LLC to Calpine Corporation. The record documents a regulatory ownership transfer but does not disclose sale consideration."} — Metcalf Energy Center | California Energy Commission · confidence: high
- Timeline.4: {"event":"Ownership transfer back to Metcalf Energy Center, LLC","date":"2004-09-13","detail":"The CEC approved transfer of ownership from Calpine Corporation to Metcalf Energy Center, LLC. The record does not disclose sale consideration."} — Metcalf Energy Center | California Energy Commission · confidence: high

## Timeline

- 2001-09-24 — CEC certification and construction launch
  The CEC certified the project, and Bechtel announced that construction was expected to begin on the 600-MW facility.
  Source: Construction To Begin On 600-megawatt Metcalf Energy Center - Bechtel (https://www.bechtel.com/press-releases/construction-to-begin-on-600-megawatt-metcalf-energy-center/)
- 2021-05 — Output expansion
  CEC-approved equipment upgrades, including hot-gas-path components, sensors, controls, and piping, were completed and increased output by 30 MW by reducing turbine heat rate.
  Source: Metcalf Energy Center | California Energy Commission (https://www.energy.ca.gov/powerplant/combined-cycle/metcalf-energy-center)

## Sources

- [Clean Natural Gas - Calpine](https://www.calpine.com/clean-and-reliable-power/our-assets/clean-natural-gas/) — calpine.com · tier other
- [MBR | Index](https://mbrweb.ferc.gov/SearchlkpEIA/Index?page=292) — mbrweb.ferc.gov · tier regulatory
- [may-1-2026-final-2027-local-capacity-technical-report-and ...](https://www.caiso.com/documents/may-1-2026-final-2027-local-capacity-technical-report-and-update-regarding-2027-flexible-capacity-needs-assessment-resource-adequacy-program-r-25-10-003.pdf) — caiso.com · tier other
- [Source](https://www.caiso.com/documents/jan-14-2025-certificate-of-concurrence-large-generator-interconnection-agreement-between-caiso-pg-e-and-metcalf-er25-925.pdf) — caiso.com · tier other
- [Metcalf Energy Center](https://www.energy.ca.gov/powerplant/combined-cycle/metcalf-energy-center) — energy.ca.gov · tier regulatory
- [Constellation Completes Calpine Transaction, Powering ...](https://www.constellationenergy.com/news/2026/01/constellation-completes-calpine-transaction-powering-americas-clean-energy-future.html) — constellationenergy.com · tier other
- [Construction To Begin On 600-megawatt Metcalf Energy Center - Bechtel](https://www.bechtel.com/press-releases/construction-to-begin-on-600-megawatt-metcalf-energy-center/) — bechtel.com · tier other
- [Source](https://www.caiso.com/Documents/Decision_ReliabilityMust-RunDesignation_MetcalfEnergyCenter-UpdatedMemo-Nov2017.pdf) — caiso.com · tier other
- [Source](https://energy.ca.gov/powerplant/combined-cycle/metcalf-energy-center) — energy.ca.gov · tier regulatory
- [Metcalf Energy Center, San Jose, California - Power Technology](https://www.power-technology.com/projects/metcalf/) — power-technology.com · 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
- [Link to Filing](https://yosemite.epa.gov/OA/EAB_WEB_Docket.nsf/Filings%20By%20Appeal%20Number/CA7ED133A68BC8DA852573EF005BA787/$File/Exhibit%2018...17.10000.pdf) — yosemite.epa.gov · tier regulatory
- [Source](https://constellationenergy.com/news/2026/01/constellation-completes-calpine-transaction-powering-americas-clean-energy-future.html) — constellationenergy.com · tier other
- [Source](https://constellationenergy.com/news/2025/constellation-to-acquire-calpine-creates-americas-leading-producer-of-clean-and-reliable-energy-to-meet-growing-demand-for-customers-and-communities.html) — constellationenergy.com · tier other
- [e10vk](https://www.sec.gov/Archives/edgar/data/916457/000089161805000256/f05222e10vk.htm) — sec.gov · tier regulatory
- [Calpine Receives Project Financing to Complete Metcalf ...](https://www.energyonline.com/Industry/News.aspx?NewsID=6875&Calpine_Receives_Project_Financing_to_Complete_Metcalf_Energy_Center) — energyonline.com · tier other
- [Table of Operating Power Plants and Projects Under ...](https://www.calpine.com/wp-content/uploads/2026/02/CPN-PORT-1_Q12026.pdf) — calpine.com · tier other
- [Announced Resource Retirement and Mothball List posted | California ISO](https://www.caiso.com/notices/announced-resource-retirement-and-mothball-list-posted-4) — caiso.com · tier other

## Data quality

- The CEC lists the facility as operational as of the current research date; no retirement or decommissioning date is identified in the cited records. Capacity is reported on different bases: the CEC states nominal 600 MW, while the FERC/EIA generator records total 635 MW from 200 MW, 200 MW, and 235 MW units. The August 2003 and September 2004 events are documented as CEC-approved ownership transfers between Metcalf Energy Center, LLC and Calpine Corporation. The cited records do not disclose an arm’s-length asset-sale price or consideration.

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