# Guernsey Power Station

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

Guernsey Power Station is a natural gas-fired power facility with 2,055 MW of EIA-reported nameplate capacity in Guernsey County, Ohio, registered as EIA Plant ID 62949. Talen Energy is the current owner; Guernsey Power Station LLC is the registered plant entity or operator. The plant's generating configuration is three natural-gas-fired, single-shaft combined-cycle units.

## Key facts

- Technology: Natural Gas Fired Combined Cycle
- Power capacity: 2055 MW
- Operating status: operating

## Grid and market context

- ISO/RTO: PJM
- Balancing authority: PJM Interconnection, LLC (PJM)
- Substation: Guernsey 765 kV switching station
- Point of interconnection: Guernsey 765 kV switching station
- Transmission owner: AEP Ohio / Ohio Power Company
- Interconnection voltage: 765 kV

## Source-backed facts

- Owner logo domain: talenenergy.com — Guernsey Power Station - Talen Energy · confidence: medium
- Description: Guernsey Power Station is a three-unit natural-gas-fired combined-cycle facility in Byesville, Guernsey County, Ohio, interconnected in the PJM-AEP market. Reproduced 2024 EIA 860 records identify generators GPS1, GPS2, and GPS3, each with 685 MW of nameplate capacity; GPS1 and GPS2 began operating in February 2023 and GPS3 in April 2023. The plant’s PJM interconnection is at the Guernsey 765 kV switching station on AEP’s Kammer–Vassell 765 kV circuit. — Guernsey Power Station - Talen Energy · confidence: medium
- Description: Guernsey Power Station is a three-unit natural-gas-fired combined-cycle facility in Byesville, Guernsey County, Ohio, interconnected in the PJM-AEP market. Reproduced 2024 EIA 860 records identify generators GPS1, GPS2, and GPS3, each with 685 MW of nameplate capacity; GPS1 and GPS2 began operating in February 2023 and GPS3 in April 2023. The plant’s PJM interconnection is at the Guernsey 765 kV switching station on AEP’s Kammer–Vassell 765 kV circuit. — Source · confidence: medium
- Parties: [{"relationship":"Current owner","name":"Talen Energy","official_url":"https://www.talenenergy.com/"},{"relationship":"Registered facility entity / applicant","name":"Guernsey Power Station LLC","official_url":"https://guernseypowerstation.com/"},{"relationship":"Operator and operations-and-maintenance provider","name":"Ethos Energy","official_url":"https://ethosenergy.com/"},{"relationship":"Developer, former owner, construction manager, and asset manager","name":"Caithness Energy, L.L.C.","official_url":"https://caithnessenergy.com/"},{"relationship":"Original project developer","name":"Apex Power Group, LLC","official_url":null},{"relationship":"Engineering, procurement, and construction contractor","name":"Gemma Power Systems","official_url":"https://www.gemmapower.com/"},{"relationship":"Engineering and field-support consultant","name":"WSP","official_url":"https://www.wsp.com/"},{"relationship":"Combined-cycle equipment OEM","name":"GE Vernova","official_url":"https://www.gevernova.com/"},{"relationship":"Transmission owner and interconnection system","name":"American Electric Power (AEP)","official_url":"https://www.aep.com/"},{"relationship":"Senior financing lender","name":"Investec Bank","official_url":"https://www.investec.com/"},{"relationship":"Preferred-equity provider and historical project investor","name":"BlackRock","official_url":"https://www.blackrock.com/"},{"relationship":"Mezzanine-debt provider","name":"AMP Capital","official_url":null}] — Talen Energy Completes Freedom and Guernsey Acquisitions | Tue, 11/25/2025 - 16:05 · confidence: medium
- Parties: [{"relationship":"Current owner","name":"Talen Energy","official_url":"https://www.talenenergy.com/"},{"relationship":"Registered facility entity / applicant","name":"Guernsey Power Station LLC","official_url":"https://guernseypowerstation.com/"},{"relationship":"Operator and operations-and-maintenance provider","name":"Ethos Energy","official_url":"https://ethosenergy.com/"},{"relationship":"Developer, former owner, construction manager, and asset manager","name":"Caithness Energy, L.L.C.","official_url":"https://caithnessenergy.com/"},{"relationship":"Original project developer","name":"Apex Power Group, LLC","official_url":null},{"relationship":"Engineering, procurement, and construction contractor","name":"Gemma Power Systems","official_url":"https://www.gemmapower.com/"},{"relationship":"Engineering and field-support consultant","name":"WSP","official_url":"https://www.wsp.com/"},{"relationship":"Combined-cycle equipment OEM","name":"GE Vernova","official_url":"https://www.gevernova.com/"},{"relationship":"Transmission owner and interconnection system","name":"American Electric Power (AEP)","official_url":"https://www.aep.com/"},{"relationship":"Senior financing lender","name":"Investec Bank","official_url":"https://www.investec.com/"},{"relationship":"Preferred-equity provider and historical project investor","name":"BlackRock","official_url":"https://www.blackrock.com/"},{"relationship":"Mezzanine-debt provider","name":"AMP Capital","official_url":null}] — Source · confidence: medium
- Parties: [{"relationship":"Current owner","name":"Talen Energy","official_url":"https://www.talenenergy.com/"},{"relationship":"Registered facility entity / applicant","name":"Guernsey Power Station LLC","official_url":"https://guernseypowerstation.com/"},{"relationship":"Operator and operations-and-maintenance provider","name":"Ethos Energy","official_url":"https://ethosenergy.com/"},{"relationship":"Developer, former owner, construction manager, and asset manager","name":"Caithness Energy, L.L.C.","official_url":"https://caithnessenergy.com/"},{"relationship":"Original project developer","name":"Apex Power Group, LLC","official_url":null},{"relationship":"Engineering, procurement, and construction contractor","name":"Gemma Power Systems","official_url":"https://www.gemmapower.com/"},{"relationship":"Engineering and field-support consultant","name":"WSP","official_url":"https://www.wsp.com/"},{"relationship":"Combined-cycle equipment OEM","name":"GE Vernova","official_url":"https://www.gevernova.com/"},{"relationship":"Transmission owner and interconnection system","name":"American Electric Power (AEP)","official_url":"https://www.aep.com/"},{"relationship":"Senior financing lender","name":"Investec Bank","official_url":"https://www.investec.com/"},{"relationship":"Preferred-equity provider and historical project investor","name":"BlackRock","official_url":"https://www.blackrock.com/"},{"relationship":"Mezzanine-debt provider","name":"AMP Capital","official_url":null}] — Guernsey Power Station · confidence: medium
- Parties: [{"relationship":"Current owner","name":"Talen Energy","official_url":"https://www.talenenergy.com/"},{"relationship":"Registered facility entity / applicant","name":"Guernsey Power Station LLC","official_url":"https://guernseypowerstation.com/"},{"relationship":"Operator and operations-and-maintenance provider","name":"Ethos Energy","official_url":"https://ethosenergy.com/"},{"relationship":"Developer, former owner, construction manager, and asset manager","name":"Caithness Energy, L.L.C.","official_url":"https://caithnessenergy.com/"},{"relationship":"Original project developer","name":"Apex Power Group, LLC","official_url":null},{"relationship":"Engineering, procurement, and construction contractor","name":"Gemma Power Systems","official_url":"https://www.gemmapower.com/"},{"relationship":"Engineering and field-support consultant","name":"WSP","official_url":"https://www.wsp.com/"},{"relationship":"Combined-cycle equipment OEM","name":"GE Vernova","official_url":"https://www.gevernova.com/"},{"relationship":"Transmission owner and interconnection system","name":"American Electric Power (AEP)","official_url":"https://www.aep.com/"},{"relationship":"Senior financing lender","name":"Investec Bank","official_url":"https://www.investec.com/"},{"relationship":"Preferred-equity provider and historical project investor","name":"BlackRock","official_url":"https://www.blackrock.com/"},{"relationship":"Mezzanine-debt provider","name":"AMP Capital","official_url":null}] — GE-Powered Guernsey Power Station Delivers 1.8 GW of Electricity to Help Coal-to-Gas Transition in Ohio | GE Vernova News · confidence: medium
- Parties: [{"relationship":"Current owner","name":"Talen Energy","official_url":"https://www.talenenergy.com/"},{"relationship":"Registered facility entity / applicant","name":"Guernsey Power Station LLC","official_url":"https://guernseypowerstation.com/"},{"relationship":"Operator and operations-and-maintenance provider","name":"Ethos Energy","official_url":"https://ethosenergy.com/"},{"relationship":"Developer, former owner, construction manager, and asset manager","name":"Caithness Energy, L.L.C.","official_url":"https://caithnessenergy.com/"},{"relationship":"Original project developer","name":"Apex Power Group, LLC","official_url":null},{"relationship":"Engineering, procurement, and construction contractor","name":"Gemma Power Systems","official_url":"https://www.gemmapower.com/"},{"relationship":"Engineering and field-support consultant","name":"WSP","official_url":"https://www.wsp.com/"},{"relationship":"Combined-cycle equipment OEM","name":"GE Vernova","official_url":"https://www.gevernova.com/"},{"relationship":"Transmission owner and interconnection system","name":"American Electric Power (AEP)","official_url":"https://www.aep.com/"},{"relationship":"Senior financing lender","name":"Investec Bank","official_url":"https://www.investec.com/"},{"relationship":"Preferred-equity provider and historical project investor","name":"BlackRock","official_url":"https://www.blackrock.com/"},{"relationship":"Mezzanine-debt provider","name":"AMP Capital","official_url":null}] — Source · confidence: medium
- Parties: [{"relationship":"Current owner","name":"Talen Energy","official_url":"https://www.talenenergy.com/"},{"relationship":"Registered facility entity / applicant","name":"Guernsey Power Station LLC","official_url":"https://guernseypowerstation.com/"},{"relationship":"Operator and operations-and-maintenance provider","name":"Ethos Energy","official_url":"https://ethosenergy.com/"},{"relationship":"Developer, former owner, construction manager, and asset manager","name":"Caithness Energy, L.L.C.","official_url":"https://caithnessenergy.com/"},{"relationship":"Original project developer","name":"Apex Power Group, LLC","official_url":null},{"relationship":"Engineering, procurement, and construction contractor","name":"Gemma Power Systems","official_url":"https://www.gemmapower.com/"},{"relationship":"Engineering and field-support consultant","name":"WSP","official_url":"https://www.wsp.com/"},{"relationship":"Combined-cycle equipment OEM","name":"GE Vernova","official_url":"https://www.gevernova.com/"},{"relationship":"Transmission owner and interconnection system","name":"American Electric Power (AEP)","official_url":"https://www.aep.com/"},{"relationship":"Senior financing lender","name":"Investec Bank","official_url":"https://www.investec.com/"},{"relationship":"Preferred-equity provider and historical project investor","name":"BlackRock","official_url":"https://www.blackrock.com/"},{"relationship":"Mezzanine-debt provider","name":"AMP Capital","official_url":null}] — Kirkland Counsels Lenders on Financing of Guernsey Power Project | News | Kirkland & Ellis LLP · confidence: medium
- Identifiers.6: {"value":"PJM","system":"EIA RTO/ISO location designation"} — Guernsey Power Station - Talen Energy · confidence: high
- Identifiers.7: {"value":"PJM-AEP","system":"Market location"} — Source · confidence: high
- Identifiers.8: {"value":"AD2-189","system":"PJM queue position"} — Source · confidence: medium
- Identifiers.9: {"value":"AB2-067","system":"PJM prior queue position"} — Source · confidence: medium
- Identifiers.10: {"value":"AC1-044","system":"PJM prior queue position"} — Source · confidence: high
- Parties.0: {"relationship":"Current owner","name":"Talen Energy","official_url":"https://www.talenenergy.com/"} — Guernsey Power Station - Talen Energy · confidence: high
- Parties.1: {"relationship":"Registered facility entity / applicant","name":"Guernsey Power Station LLC","official_url":"https://guernseypowerstation.com/"} — Source · confidence: high
- Parties.2: {"relationship":"Operator and operations-and-maintenance provider","name":"Ethos Energy","official_url":"https://ethosenergy.com/"} — Talen Energy Completes Freedom and Guernsey Acquisitions | Tue, 11/25/2025 - 16:05 · confidence: high
- Parties.2: {"relationship":"Operator and operations-and-maintenance provider","name":"Ethos Energy","official_url":"https://ethosenergy.com/"} — Expert Operations & Maintenance for New Combined Cycle Power Plant | EthosEnergy · confidence: high
- Parties.3: {"relationship":"Developer, former owner, construction manager, and asset manager","name":"Caithness Energy, L.L.C.","official_url":"https://caithnessenergy.com/"} — Talen Energy Completes Freedom and Guernsey Acquisitions | Tue, 11/25/2025 - 16:05 · confidence: high
- Parties.6: {"relationship":"Engineering and field-support consultant","name":"WSP","official_url":"https://www.wsp.com/"} — Guernsey Power Station · confidence: high
- Parties.7: {"relationship":"Combined-cycle equipment OEM","name":"GE Vernova","official_url":"https://www.gevernova.com/"} — GE-Powered Guernsey Power Station Delivers 1.8 GW of Electricity to Help Coal-to-Gas Transition in Ohio | GE Vernova News · confidence: high
- Parties.8: {"relationship":"Transmission owner and interconnection system","name":"American Electric Power (AEP)","official_url":"https://www.aep.com/"} — Source · confidence: medium
- Parties.9: {"relationship":"Senior financing lender","name":"Investec Bank","official_url":"https://www.investec.com/"} — Kirkland Counsels Lenders on Financing of Guernsey Power Project | News | Kirkland & Ellis LLP · confidence: high
- Parties.10: {"relationship":"Preferred-equity provider and historical project investor","name":"BlackRock","official_url":"https://www.blackrock.com/"} — Kirkland Counsels Lenders on Financing of Guernsey Power Project | News | Kirkland & Ellis LLP · confidence: high
- Parties.11: {"relationship":"Mezzanine-debt provider","name":"AMP Capital","official_url":null} — Kirkland Counsels Lenders on Financing of Guernsey Power Project | News | Kirkland & Ellis LLP · confidence: medium
- Unit count: 3 — Guernsey Power Station - Talen Energy · confidence: high
- Product url: https://www.gevernova.com/gas-power/products/gas-turbines/7ha — 7HA Gas Turbine | GE Vernova · confidence: high
- Description: Guernsey Power Station is a three-unit natural-gas-fired combined-cycle facility in Byesville, Guernsey County, Ohio, with EIA-derived records identifying three 685-MW generators and 2,055 MW of aggregate nameplate capacity. It sells energy and capacity into PJM-AEP and is interconnected at the Guernsey 765-kV switching station. Apex Power Group and Caithness Energy developed the project, Gemma Power Systems served as EPC contractor, and EthosEnergy provided operations and maintenance services. Talen Energy acquired the facility in November 2025 from Caithness Energy and BlackRock after commercial operations began in 2023. — Guernsey Power Station · confidence: medium
- Description: Guernsey Power Station is a three-unit natural-gas-fired combined-cycle facility in Byesville, Guernsey County, Ohio, with EIA-derived records identifying three 685-MW generators and 2,055 MW of aggregate nameplate capacity. It sells energy and capacity into PJM-AEP and is interconnected at the Guernsey 765-kV switching station. Apex Power Group and Caithness Energy developed the project, Gemma Power Systems served as EPC contractor, and EthosEnergy provided operations and maintenance services. Talen Energy acquired the facility in November 2025 from Caithness Energy and BlackRock after commercial operations began in 2023. — Expert Operations & Maintenance for New Combined Cycle Power Plant | EthosEnergy · confidence: medium
- Description: Guernsey Power Station is a three-unit natural-gas-fired combined-cycle facility in Byesville, Guernsey County, Ohio, with EIA-derived records identifying three 685-MW generators and 2,055 MW of aggregate nameplate capacity. It sells energy and capacity into PJM-AEP and is interconnected at the Guernsey 765-kV switching station. Apex Power Group and Caithness Energy developed the project, Gemma Power Systems served as EPC contractor, and EthosEnergy provided operations and maintenance services. Talen Energy acquired the facility in November 2025 from Caithness Energy and BlackRock after commercial operations began in 2023. — Talen Energy Completes Freedom and Guernsey Acquisitions | Tue, 11/25/2025 - 16:05 · confidence: medium
- Quality notes: ["Capacity figures differ by source and measurement basis: EIA-derived records total 2,055 MW of nameplate capacity, Talen reports 1,771 MW of owned generating capacity, and project sources report approximately 1,836-1,875 MW.","Operating milestones use different conventions: EIA-derived records place GPS1 and GPS2 in operation in February 2023, EthosEnergy records commercial care, custody, and control by April 2023, and GE Vernova announced commercial operation on June 7, 2023.","The August 2019 project financing and November 2025 portfolio acquisition are separate transactions. The disclosed acquisition materials do not allocate a standalone Guernsey purchase price; the reported $3.5 billion net acquisition price and $3.8 billion financing package covered the combined Freedom and Guernsey transaction.","The available status record lists the facility as operating. No separate retirement or Guernsey-specific repowering milestone is identified; an ERCOT repowering reference on the project site concerns other plants."] — Source · confidence: medium
- Quality notes: ["Capacity figures differ by source and measurement basis: EIA-derived records total 2,055 MW of nameplate capacity, Talen reports 1,771 MW of owned generating capacity, and project sources report approximately 1,836-1,875 MW.","Operating milestones use different conventions: EIA-derived records place GPS1 and GPS2 in operation in February 2023, EthosEnergy records commercial care, custody, and control by April 2023, and GE Vernova announced commercial operation on June 7, 2023.","The August 2019 project financing and November 2025 portfolio acquisition are separate transactions. The disclosed acquisition materials do not allocate a standalone Guernsey purchase price; the reported $3.5 billion net acquisition price and $3.8 billion financing package covered the combined Freedom and Guernsey transaction.","The available status record lists the facility as operating. No separate retirement or Guernsey-specific repowering milestone is identified; an ERCOT repowering reference on the project site concerns other plants."] — GE-Powered Guernsey Power Station Delivers 1.8 GW of Electricity to Help Coal-to-Gas Transition in Ohio | GE Vernova News · confidence: medium
- Quality notes: ["Capacity figures differ by source and measurement basis: EIA-derived records total 2,055 MW of nameplate capacity, Talen reports 1,771 MW of owned generating capacity, and project sources report approximately 1,836-1,875 MW.","Operating milestones use different conventions: EIA-derived records place GPS1 and GPS2 in operation in February 2023, EthosEnergy records commercial care, custody, and control by April 2023, and GE Vernova announced commercial operation on June 7, 2023.","The August 2019 project financing and November 2025 portfolio acquisition are separate transactions. The disclosed acquisition materials do not allocate a standalone Guernsey purchase price; the reported $3.5 billion net acquisition price and $3.8 billion financing package covered the combined Freedom and Guernsey transaction.","The available status record lists the facility as operating. No separate retirement or Guernsey-specific repowering milestone is identified; an ERCOT repowering reference on the project site concerns other plants."] — Expert Operations & Maintenance for New Combined Cycle Power Plant | EthosEnergy · confidence: medium
- Quality notes: ["Capacity figures differ by source and measurement basis: EIA-derived records total 2,055 MW of nameplate capacity, Talen reports 1,771 MW of owned generating capacity, and project sources report approximately 1,836-1,875 MW.","Operating milestones use different conventions: EIA-derived records place GPS1 and GPS2 in operation in February 2023, EthosEnergy records commercial care, custody, and control by April 2023, and GE Vernova announced commercial operation on June 7, 2023.","The August 2019 project financing and November 2025 portfolio acquisition are separate transactions. The disclosed acquisition materials do not allocate a standalone Guernsey purchase price; the reported $3.5 billion net acquisition price and $3.8 billion financing package covered the combined Freedom and Guernsey transaction.","The available status record lists the facility as operating. No separate retirement or Guernsey-specific repowering milestone is identified; an ERCOT repowering reference on the project site concerns other plants."] — Talen Energy Expands and Enhances Portfolio with Best-in-Class CCGT Acquisitions in PJM | Thu, 07/17/2025 - 16:01 · confidence: medium
- Quality notes: ["Capacity figures differ by source and measurement basis: EIA-derived records total 2,055 MW of nameplate capacity, Talen reports 1,771 MW of owned generating capacity, and project sources report approximately 1,836-1,875 MW.","Operating milestones use different conventions: EIA-derived records place GPS1 and GPS2 in operation in February 2023, EthosEnergy records commercial care, custody, and control by April 2023, and GE Vernova announced commercial operation on June 7, 2023.","The August 2019 project financing and November 2025 portfolio acquisition are separate transactions. The disclosed acquisition materials do not allocate a standalone Guernsey purchase price; the reported $3.5 billion net acquisition price and $3.8 billion financing package covered the combined Freedom and Guernsey transaction.","The available status record lists the facility as operating. No separate retirement or Guernsey-specific repowering milestone is identified; an ERCOT repowering reference on the project site concerns other plants."] — Guernsey Power Station - Talen Energy · confidence: medium
- Financing summary: Caithness Energy closed $1.6 billion of construction financing in August 2019. A lender-side account separately described a $1.075 billion financing led by Investec Bank, with BlackRock providing preferred equity and AMP Capital participating; the available sources do not clarify whether that amount was a tranche within the $1.6 billion total. In July 2025, Talen announced a $3.5 billion net acquisition price for the combined Freedom and Guernsey transactions after estimated tax benefits and expected to issue approximately $3.8 billion of debt to fund the acquisitions and refinance target debt. At closing on November 25, 2025, Talen reported $2.7 billion of senior unsecured notes and a $1.2 billion senior secured term-loan B facility; those amounts funded the combined portfolio transaction rather than disclosed Guernsey-only purchase consideration. — $1.6B financing obtained for Guernsey Power Station · confidence: medium
- Financing summary: Caithness Energy closed $1.6 billion of construction financing in August 2019. A lender-side account separately described a $1.075 billion financing led by Investec Bank, with BlackRock providing preferred equity and AMP Capital participating; the available sources do not clarify whether that amount was a tranche within the $1.6 billion total. In July 2025, Talen announced a $3.5 billion net acquisition price for the combined Freedom and Guernsey transactions after estimated tax benefits and expected to issue approximately $3.8 billion of debt to fund the acquisitions and refinance target debt. At closing on November 25, 2025, Talen reported $2.7 billion of senior unsecured notes and a $1.2 billion senior secured term-loan B facility; those amounts funded the combined portfolio transaction rather than disclosed Guernsey-only purchase consideration. — Kirkland Counsels Lenders on Financing of Guernsey... · confidence: medium
- Financing summary: Caithness Energy closed $1.6 billion of construction financing in August 2019. A lender-side account separately described a $1.075 billion financing led by Investec Bank, with BlackRock providing preferred equity and AMP Capital participating; the available sources do not clarify whether that amount was a tranche within the $1.6 billion total. In July 2025, Talen announced a $3.5 billion net acquisition price for the combined Freedom and Guernsey transactions after estimated tax benefits and expected to issue approximately $3.8 billion of debt to fund the acquisitions and refinance target debt. At closing on November 25, 2025, Talen reported $2.7 billion of senior unsecured notes and a $1.2 billion senior secured term-loan B facility; those amounts funded the combined portfolio transaction rather than disclosed Guernsey-only purchase consideration. — Talen Energy Expands and Enhances Portfolio with Best-in-Class CCGT Acquisitions in PJM | Thu, 07/17/2025 - 16:01 · confidence: medium
- Financing summary: Caithness Energy closed $1.6 billion of construction financing in August 2019. A lender-side account separately described a $1.075 billion financing led by Investec Bank, with BlackRock providing preferred equity and AMP Capital participating; the available sources do not clarify whether that amount was a tranche within the $1.6 billion total. In July 2025, Talen announced a $3.5 billion net acquisition price for the combined Freedom and Guernsey transactions after estimated tax benefits and expected to issue approximately $3.8 billion of debt to fund the acquisitions and refinance target debt. At closing on November 25, 2025, Talen reported $2.7 billion of senior unsecured notes and a $1.2 billion senior secured term-loan B facility; those amounts funded the combined portfolio transaction rather than disclosed Guernsey-only purchase consideration. — Talen Energy Completes Freedom and Guernsey Acquisitions | Tue, 11/25/2025 - 16:05 · confidence: medium
- Timeline: [{"event":"Original development","date":"2007","detail":"Apex Power Group was formed and developed Guernsey Power Station with Caithness Energy."},{"event":"Project financing closed","date":"2019-08","detail":"Caithness Energy closed $1.6 billion of financing for construction of the fully permitted 1,875-MW combined-cycle natural-gas facility."},{"event":"Construction began","date":"2019-09","detail":"EthosEnergy records construction beginning in September 2019; a contemporaneous local report placed the start in August 2019."},{"event":"Construction completion","date":"2022","detail":"Project records report completion in 2022 after construction managed by Caithness Energy and executed by Gemma Power Systems."},{"event":"Initial unit operation","date":"2023-02","detail":"EIA-derived records identify GPS1 and GPS2 as operating from February 2023."},{"event":"Commercial care and control","date":"2023-04","detail":"EthosEnergy states that it had assumed commercial care, custody, and control of the facility by April 2023."},{"event":"Commercial operation announced","date":"2023-06-07","detail":"GE Vernova announced the start of commercial operation of Caithness Energy's 1,875-MW Guernsey Power Station."},{"event":"Acquisition agreement announced","date":"2025-07-17","detail":"Talen announced agreements to acquire the Guernsey interests of Caithness Energy and BlackRock as part of the combined Freedom and Guernsey transaction."},{"event":"Acquisition completed","date":"2025-11-25","detail":"Talen completed the Guernsey acquisition and reported $2.7 billion of senior unsecured notes and a $1.2 billion senior secured term-loan B facility for the combined acquisitions."},{"event":"Operating status","date":"2026-08-02","detail":"The facility remains listed as operating; no separate retirement or Guernsey-specific repowering milestone is reported."}] — Expert Operations & Maintenance for New Combined Cycle Power Plant | EthosEnergy · confidence: medium
- Timeline: [{"event":"Original development","date":"2007","detail":"Apex Power Group was formed and developed Guernsey Power Station with Caithness Energy."},{"event":"Project financing closed","date":"2019-08","detail":"Caithness Energy closed $1.6 billion of financing for construction of the fully permitted 1,875-MW combined-cycle natural-gas facility."},{"event":"Construction began","date":"2019-09","detail":"EthosEnergy records construction beginning in September 2019; a contemporaneous local report placed the start in August 2019."},{"event":"Construction completion","date":"2022","detail":"Project records report completion in 2022 after construction managed by Caithness Energy and executed by Gemma Power Systems."},{"event":"Initial unit operation","date":"2023-02","detail":"EIA-derived records identify GPS1 and GPS2 as operating from February 2023."},{"event":"Commercial care and control","date":"2023-04","detail":"EthosEnergy states that it had assumed commercial care, custody, and control of the facility by April 2023."},{"event":"Commercial operation announced","date":"2023-06-07","detail":"GE Vernova announced the start of commercial operation of Caithness Energy's 1,875-MW Guernsey Power Station."},{"event":"Acquisition agreement announced","date":"2025-07-17","detail":"Talen announced agreements to acquire the Guernsey interests of Caithness Energy and BlackRock as part of the combined Freedom and Guernsey transaction."},{"event":"Acquisition completed","date":"2025-11-25","detail":"Talen completed the Guernsey acquisition and reported $2.7 billion of senior unsecured notes and a $1.2 billion senior secured term-loan B facility for the combined acquisitions."},{"event":"Operating status","date":"2026-08-02","detail":"The facility remains listed as operating; no separate retirement or Guernsey-specific repowering milestone is reported."}] — GE-Powered Guernsey Power Station Delivers 1.8 GW of Electricity to Help Coal-to-Gas Transition in Ohio | GE Vernova News · confidence: medium
- Timeline: [{"event":"Original development","date":"2007","detail":"Apex Power Group was formed and developed Guernsey Power Station with Caithness Energy."},{"event":"Project financing closed","date":"2019-08","detail":"Caithness Energy closed $1.6 billion of financing for construction of the fully permitted 1,875-MW combined-cycle natural-gas facility."},{"event":"Construction began","date":"2019-09","detail":"EthosEnergy records construction beginning in September 2019; a contemporaneous local report placed the start in August 2019."},{"event":"Construction completion","date":"2022","detail":"Project records report completion in 2022 after construction managed by Caithness Energy and executed by Gemma Power Systems."},{"event":"Initial unit operation","date":"2023-02","detail":"EIA-derived records identify GPS1 and GPS2 as operating from February 2023."},{"event":"Commercial care and control","date":"2023-04","detail":"EthosEnergy states that it had assumed commercial care, custody, and control of the facility by April 2023."},{"event":"Commercial operation announced","date":"2023-06-07","detail":"GE Vernova announced the start of commercial operation of Caithness Energy's 1,875-MW Guernsey Power Station."},{"event":"Acquisition agreement announced","date":"2025-07-17","detail":"Talen announced agreements to acquire the Guernsey interests of Caithness Energy and BlackRock as part of the combined Freedom and Guernsey transaction."},{"event":"Acquisition completed","date":"2025-11-25","detail":"Talen completed the Guernsey acquisition and reported $2.7 billion of senior unsecured notes and a $1.2 billion senior secured term-loan B facility for the combined acquisitions."},{"event":"Operating status","date":"2026-08-02","detail":"The facility remains listed as operating; no separate retirement or Guernsey-specific repowering milestone is reported."}] — Talen Energy Expands and Enhances Portfolio with Best-in-Class CCGT Acquisitions in PJM | Thu, 07/17/2025 - 16:01 · confidence: medium
- Timeline: [{"event":"Original development","date":"2007","detail":"Apex Power Group was formed and developed Guernsey Power Station with Caithness Energy."},{"event":"Project financing closed","date":"2019-08","detail":"Caithness Energy closed $1.6 billion of financing for construction of the fully permitted 1,875-MW combined-cycle natural-gas facility."},{"event":"Construction began","date":"2019-09","detail":"EthosEnergy records construction beginning in September 2019; a contemporaneous local report placed the start in August 2019."},{"event":"Construction completion","date":"2022","detail":"Project records report completion in 2022 after construction managed by Caithness Energy and executed by Gemma Power Systems."},{"event":"Initial unit operation","date":"2023-02","detail":"EIA-derived records identify GPS1 and GPS2 as operating from February 2023."},{"event":"Commercial care and control","date":"2023-04","detail":"EthosEnergy states that it had assumed commercial care, custody, and control of the facility by April 2023."},{"event":"Commercial operation announced","date":"2023-06-07","detail":"GE Vernova announced the start of commercial operation of Caithness Energy's 1,875-MW Guernsey Power Station."},{"event":"Acquisition agreement announced","date":"2025-07-17","detail":"Talen announced agreements to acquire the Guernsey interests of Caithness Energy and BlackRock as part of the combined Freedom and Guernsey transaction."},{"event":"Acquisition completed","date":"2025-11-25","detail":"Talen completed the Guernsey acquisition and reported $2.7 billion of senior unsecured notes and a $1.2 billion senior secured term-loan B facility for the combined acquisitions."},{"event":"Operating status","date":"2026-08-02","detail":"The facility remains listed as operating; no separate retirement or Guernsey-specific repowering milestone is reported."}] — Talen Energy Completes Freedom and Guernsey Acquisitions | Tue, 11/25/2025 - 16:05 · confidence: medium
- Timeline: [{"event":"Original development","date":"2007","detail":"Apex Power Group was formed and developed Guernsey Power Station with Caithness Energy."},{"event":"Project financing closed","date":"2019-08","detail":"Caithness Energy closed $1.6 billion of financing for construction of the fully permitted 1,875-MW combined-cycle natural-gas facility."},{"event":"Construction began","date":"2019-09","detail":"EthosEnergy records construction beginning in September 2019; a contemporaneous local report placed the start in August 2019."},{"event":"Construction completion","date":"2022","detail":"Project records report completion in 2022 after construction managed by Caithness Energy and executed by Gemma Power Systems."},{"event":"Initial unit operation","date":"2023-02","detail":"EIA-derived records identify GPS1 and GPS2 as operating from February 2023."},{"event":"Commercial care and control","date":"2023-04","detail":"EthosEnergy states that it had assumed commercial care, custody, and control of the facility by April 2023."},{"event":"Commercial operation announced","date":"2023-06-07","detail":"GE Vernova announced the start of commercial operation of Caithness Energy's 1,875-MW Guernsey Power Station."},{"event":"Acquisition agreement announced","date":"2025-07-17","detail":"Talen announced agreements to acquire the Guernsey interests of Caithness Energy and BlackRock as part of the combined Freedom and Guernsey transaction."},{"event":"Acquisition completed","date":"2025-11-25","detail":"Talen completed the Guernsey acquisition and reported $2.7 billion of senior unsecured notes and a $1.2 billion senior secured term-loan B facility for the combined acquisitions."},{"event":"Operating status","date":"2026-08-02","detail":"The facility remains listed as operating; no separate retirement or Guernsey-specific repowering milestone is reported."}] — Guernsey power station - Global Energy Monitor · confidence: medium
- Commercial parties.0: {"relationship":"Current owner and 2025 acquirer","name":"Talen Energy","detail":"Acquired Guernsey Power Station in November 2025 from Caithness Energy and BlackRock as part of its combined Freedom and Guernsey PJM portfolio transaction.","official_url":"https://www.talenenergy.com/"} — Talen Energy Completes Freedom and Guernsey Acquisitions | Tue, 11/25/2025 - 16:05 · confidence: high
- Commercial parties.1: {"relationship":"Registered facility entity and applicant","name":"Guernsey Power Station LLC","detail":"Named as the facility entity and applicant for the Byesville, Ohio generating station and environmental permits.","official_url":"https://guernseypowerstation.com/"} — Source · confidence: high
- Commercial parties.2: {"relationship":"Operator and operations-and-maintenance provider","name":"EthosEnergy","detail":"Provided third-party operations, maintenance, and commercial care, custody, and control services for the facility.","official_url":"https://ethosenergy.com/"} — Expert Operations & Maintenance for New Combined Cycle Power Plant | EthosEnergy · confidence: medium
- Commercial parties.6: {"relationship":"Engineering and field-support consultant","name":"WSP","detail":"Provided mechanical, structural, electrical, piping, startup, and commissioning field support alongside Gemma Power Systems.","official_url":"https://www.wsp.com/"} — Guernsey Power Station · confidence: high
- Commercial parties.7: {"relationship":"Combined-cycle equipment OEM","name":"GE Vernova","detail":"Supplied the 7HA.02 gas turbines, W84 generators, STF-A650 steam turbines, and triple-pressure reheat heat-recovery steam generators.","official_url":"https://www.gevernova.com/"} — GE-Powered Guernsey Power Station Delivers 1.8 GW of Electricity to Help Coal-to-Gas Transition in Ohio | GE Vernova News · confidence: high
- Commercial parties.8: {"relationship":"Transmission owner and interconnection system","name":"American Electric Power (AEP)","detail":"The PJM interconnection study identifies the AEP transmission system and the Guernsey 765-kV switching station as the plant's interconnection context.","official_url":"https://www.aep.com/"} — Source · confidence: medium
- Commercial parties.9: {"relationship":"Project-financing lead","name":"Investec Bank","detail":"Led the separately reported $1.075 billion financing associated with the 2019 Guernsey project financing.","official_url":"https://www.investec.com/"} — Kirkland Counsels Lenders on Financing of Guernsey... · confidence: medium
- Commercial parties.10: {"relationship":"Preferred-equity provider and historical project investor","name":"BlackRock","detail":"Provided preferred equity during project financing and held Guernsey interests through infrastructure funds managed by Global Infrastructure Partners; those interests were acquired by Talen in 2025.","official_url":"https://www.blackrock.com/"} — Talen Energy Expands and Enhances Portfolio with Best-in-Class CCGT Acquisitions in PJM | Thu, 07/17/2025 - 16:01 · confidence: medium
- Commercial parties.11: {"relationship":"Mezzanine-debt provider","name":"AMP Capital","detail":"Identified as a participating mezzanine-debt provider in coverage of the 2019 project financing.","official_url":null} — Guernsey Power Station, Ohio, USA · confidence: medium
- Substation: Guernsey 765 kV switching station — Source · confidence: high
- Interconnection voltage kv: 765 — Source · confidence: high

## Timeline

- 2019-08 — Project financing closed
  Caithness Energy closed $1.6 billion of financing for construction of the fully permitted 1,875-MW combined-cycle natural-gas facility.
  Source: $1.6B financing obtained for Guernsey Power Station (https://www.daily-jeff.com/story/news/2019/08/30/1-6b-financing-obtained/3461371007/)
- 2022 — Construction completion
  Project records report completion in 2022 after construction managed by Caithness Energy and executed by Gemma Power Systems.
  Source: $1.6B financing obtained for Guernsey Power Station (https://www.daily-jeff.com/story/news/2019/08/30/1-6b-financing-obtained/3461371007/)
- 2023-06-07 — Commercial operation announced
  GE Vernova announced the start of commercial operation of Caithness Energy's 1,875-MW Guernsey Power Station.
  Source: GE-Powered Guernsey Power Station Delivers 1.8 GW of Electricity to Help Coal-to-Gas Transition in Ohio | GE Vernova News (https://www.gevernova.com/news/press-releases/ge-powered-guernsey-power-station-delivers-18-gw-of-electricity-to-help-coal-to-gas)
- 2026-08-02 — Operating status
  The facility remains listed as operating; no separate retirement or Guernsey-specific repowering milestone is reported.
  Source: Guernsey power station - Global Energy Monitor (https://www.gem.wiki/Guernsey_power_station)

## Sources

- [Guernsey Power Station - Talen Energy](https://guernseypowerstation.com/) — guernseypowerstation.com · tier other
- [Source](https://www.pjm.com/pjmfiles/pub/planning/project-queues/impact_studies/AD2189_imp.pdf) — pjm.com · tier other
- [Guernsey Power Station - Talen Energy](https://www.talenenergy.com/plant/guernsey-power-station/) — talenenergy.com · tier other
- [Talen Energy Completes Freedom and Guernsey Acquisitions | Tue, 11/25/2025 - 16:05](https://ir.talenenergy.com/news-releases/news-release-details/talen-energy-completes-freedom-and-guernsey-acquisitions/) — ir.talenenergy.com · tier other
- [Source](https://dam.assets.ohio.gov/image/upload/epa.ohio.gov/Portals/35/permits/DraftPN/0DP00067.pdf) — dam.assets.ohio.gov · tier regulatory
- [Caithness Energy Closes Financing of $1.6 Billion Electric Generating Facility in Guernsey County, OH - Caithness Energy, LLC](https://caithnessenergy.com/caithness-energy-closes-financing-of-1-6-billion-electric-generating-facility-in-guernsey-county-oh/) — caithnessenergy.com · tier other
- [Guernsey Power Station](https://www.wsp.com/en-us/projects/guernsey-power-station) — wsp.com · tier other
- [GE-Powered Guernsey Power Station Delivers 1.8 GW of Electricity to Help Coal-to-Gas Transition in Ohio | GE Vernova News](https://www.gevernova.com/news/press-releases/ge-powered-guernsey-power-station-delivers-18-gw-of-electricity-to-help-coal-to-gas) — gevernova.com · tier other
- [Kirkland Counsels Lenders on Financing of Guernsey ...](https://www.kirkland.com/news/in-the-news/2019/08/kirkland-counsels-lenders-on-guernsey) — kirkland.com · tier other
- [Source](https://www.pjm.com/pjmfiles/pub/planning/project-queues/impact_studies/ab2067_imp.pdf) — pjm.com · tier other
- [Expert Operations & Maintenance for New Combined Cycle Power Plant | EthosEnergy](https://ethosenergy.com/case-studies/breaking-new-ground-at-guernsey-power-station) — ethosenergy.com · tier other
- [Source](https://gem.wiki/Guernsey_power_station) — gem.wiki · tier other
- [7HA Gas Turbine | GE Vernova](https://www.gevernova.com/gas-power/products/gas-turbines/7ha) — gevernova.com · tier other
- [Source](https://talenenergy.com/plant/guernsey-power-station) — talenenergy.com · tier other
- [Talen Energy Expands and Enhances Portfolio with Best-in-Class CCGT Acquisitions in PJM | Thu, 07/17/2025 - 16:01](https://ir.talenenergy.com/news-releases/news-release-details/talen-energy-expands-and-enhances-portfolio-best-class-ccgt/) — ir.talenenergy.com · tier other
- [$1.6B financing obtained for Guernsey Power Station](https://www.daily-jeff.com/story/news/2019/08/30/1-6b-financing-obtained/3461371007/) — daily-jeff.com · tier other
- [Guernsey power station - Global Energy Monitor](https://www.gem.wiki/Guernsey_power_station) — gem.wiki · tier other
- [Guernsey Power Station, Ohio, USA](https://www.power-technology.com/projects/guernsey-power-station-ohio-usa/) — power-technology.com · tier other
- [Guernsey Power Station - Talen Energy](https://www.talenenergy.com/plant/guernsey-power-station) — talenenergy.com · tier other

## Data quality

- Capacity figures differ by source and measurement basis: EIA-derived records total 2,055 MW of nameplate capacity, Talen reports 1,771 MW of owned generating capacity, and project sources report approximately 1,836-1,875 MW. The disclosed acquisition materials do not allocate a standalone Guernsey purchase price; the reported $3.5 billion net acquisition price and $3.8 billion financing package covered the combined Freedom and Guernsey transaction. The available status record lists the facility as operating. No separate retirement or Guernsey-specific repowering milestone is identified; an ERCOT repowering reference on the project site concerns other plants.

---

Canonical page: https://askthegrid.com/assets/facilities/guernsey-power-station

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