# Commonwealth Chesapeake PJM Petroleum Liquids · https://askthegrid.com/assets/facilities/commonwealth-chesapeake Commonwealth Chesapeake is a petroleum liquids facility with 402.5 MW of EIA-reported nameplate capacity in Accomack County, Virginia, registered as EIA Plant ID 55381. Tyr Energy, Inc. is the current owner; Commonwealth Chesapeake Co LLC is the registered plant entity or operator. The plant's generating configuration is seven GE LM6000 PC simple-cycle combustion turbines fired only on diesel fuel and CT1–CT3 installed in 2000 and CT4–CT7 installed in 2001. Tyr Energy, Inc. acquired the project from Tenaska Capital Management in 2008. PJM LMP node designations 93150, 93151, 93152, 1048078, 1048079, 104080, and 104081 · 138 kV · Delmarva Power. ## Key facts - Technology: Petroleum Liquids - Power capacity: 402.5 MW - Commercial operation: 2000 - Operating status: operating ## Grid and market context - ISO/RTO: PJM - Balancing authority: PJM Interconnection, LLC (PJM) ## Source-backed facts - Identifiers: [{"value":"55381","system":"EIA plant ID"},{"value":"PJM Interconnection, LLC","system":"Balancing authority / RTO"},{"value":"RFC","system":"NERC region"},{"value":"UNT1, UNT2, UNT3, UNT4, UNT5, UNT6, UNT7","system":"EIA generator IDs"},{"value":"UNT1: 93150; UNT2: 93151; UNT3: 93152; UNT4: 1048078; UNT5: 1048079; UNT6: 104080; UNT7: 104081","system":"PJM LMP node designations"},{"value":"99-415-001; 99-415-003","system":"FERC exempt wholesale generator docket"},{"value":"12092: UNT4; 12093: UNT5; 12094: UNT6","system":"FERC EIA asset-record IDs"}] — MBR | Index · confidence: medium - Identifiers: [{"value":"55381","system":"EIA plant ID"},{"value":"PJM Interconnection, LLC","system":"Balancing authority / RTO"},{"value":"RFC","system":"NERC region"},{"value":"UNT1, UNT2, UNT3, UNT4, UNT5, UNT6, UNT7","system":"EIA generator IDs"},{"value":"UNT1: 93150; UNT2: 93151; UNT3: 93152; UNT4: 1048078; UNT5: 1048079; UNT6: 104080; UNT7: 104081","system":"PJM LMP node designations"},{"value":"99-415-001; 99-415-003","system":"FERC exempt wholesale generator docket"},{"value":"12092: UNT4; 12093: UNT5; 12094: UNT6","system":"FERC EIA asset-record IDs"}] — Sheet1 · confidence: medium - Description: Commonwealth Chesapeake is an operational 402.5-MW petroleum-liquids power plant in Accomack County, Virginia, at 3415 White Oak Way in New Church. The plant has seven generating units, operates within the PJM Interconnection market, and is operated by Commonwealth Chesapeake Co LLC. Its combustion turbines use distillate fuel oil and began entering service in 2000 and 2001. — Spinning Reserve: Commonwealth Chesapeake gives LM6000s double duty · confidence: medium - Identifiers.3: {"value":"UNT1, UNT2, UNT3, UNT4, UNT5, UNT6, UNT7","system":"EIA generator IDs"} — Commonwealth Chesapeake power station - Global Energy Monitor · confidence: medium - Identifiers.6: {"value":"12092: UNT4; 12093: UNT5; 12094: UNT6","system":"FERC EIA asset-record IDs"} — MBR | Index · confidence: high - Parties.3: {"relationship":"Operations and maintenance provider","name":"North American Energy Services (NAES)","official_url":"https://www.naes.com/"} — Spinning Reserve: Commonwealth Chesapeake gives LM6000s double duty · confidence: medium - Parties.4: {"relationship":"Combustion-turbine OEM","name":"GE","official_url":"https://www.gevernova.com/gas-power/products/gas-turbines/lm6000"} — Spinning Reserve: Commonwealth Chesapeake gives LM6000s double duty · confidence: medium - Parties.4: {"relationship":"Combustion-turbine OEM","name":"GE","official_url":"https://www.gevernova.com/gas-power/products/gas-turbines/lm6000"} — LM6000 Aeroderivative Gas Turbine · confidence: medium - Parties.5: {"relationship":"Clutch supplier for units 4-7","name":"SSS Clutch / SSS Gears","official_url":"https://www.sssgears.co.uk/"} — Spinning Reserve: Commonwealth Chesapeake gives LM6000s double duty · confidence: medium - Parties.6: {"relationship":"Original historical owner","name":"TECO Energy","official_url":null} — Spinning Reserve: Commonwealth Chesapeake gives LM6000s double duty · confidence: medium - Parties.7: {"relationship":"Historical owner before Tyr Energy acquisition","name":"Tenaska Capital Management","official_url":null} — Spinning Reserve: Commonwealth Chesapeake gives LM6000s double duty · confidence: medium - Parties.8: {"relationship":"Balancing authority / RTO","name":"PJM Interconnection, LLC","official_url":"https://www.pjm.com/"} — Spinning Reserve: Commonwealth Chesapeake gives LM6000s double duty · confidence: high - Unit configuration: Seven GE LM6000 PC simple-cycle combustion turbines fired only on diesel fuel; CT1–CT3 installed in 2000 and CT4–CT7 installed in 2001. — Commonwealth of Virginia VIRGINIA DEPARTMENT OF ENVIRONMENTAL QUALITY · confidence: high - Unit count: 7 — Commonwealth of Virginia VIRGINIA DEPARTMENT OF ENVIRONMENTAL QUALITY · confidence: high - Product url: https://www.gevernova.com/gas-power/products/gas-turbines/lm6000 — LM6000 Aeroderivative Gas Turbine | GE Vernova · confidence: high - Manufacturer domain: gevernova.com — LM6000 Aeroderivative Gas Turbine | GE Vernova · confidence: high - Product family: LM6000 — LM6000 Aeroderivative Gas Turbine | GE Vernova · confidence: high - Description: Commonwealth Chesapeake is a seven-unit, 402.5-MW nameplate petroleum-liquids plant in New Church, Accomack County, Virginia; historical plant reporting describes the same facility as seven GE LM6000 simple-cycle turbines with 315 MW of combined net output. Tyr Energy is identified as the owner or owner affiliate, while Commonwealth Chesapeake Co LLC is the plant operator, and the facility operates in the PJM market. The first three units entered commercial service in 2000 and four more were added in 2001. TECO Energy sold the project company to a Tenaska affiliate in April 2005, and Tyr Energy later acquired it from Tenaska in 2008; units 4–7 were fitted with clutches to provide PJM spinning reserve. — Double Duty · confidence: medium - Quality notes: ["Current EIA and owner records identify the plant as operational as of August 2, 2026, while a secondary plant-tracker record labels it mothballed; the status should therefore be read with source-date and source-quality context.","Capacity figures use different bases: current EIA data reports 402.5 MW of nameplate capacity, while historical project reporting describes 315 MW of combined net output.","The Tyr Energy transaction is dated February 2008 by a contemporaneous April 2008 report, while a transaction database gives December 17, 2008; the acquisition year is clear but the exact closing month is inconsistent across public records.","No definitive retirement date or major repowering is identified. A 2021 plant report stated that Commonwealth Chesapeake had not made major changes to its seven turbines, although clutch-related foundation and coupling modifications were made for units 4–7."] — Source · confidence: high - Quality notes: ["Current EIA and owner records identify the plant as operational as of August 2, 2026, while a secondary plant-tracker record labels it mothballed; the status should therefore be read with source-date and source-quality context.","Capacity figures use different bases: current EIA data reports 402.5 MW of nameplate capacity, while historical project reporting describes 315 MW of combined net output.","The Tyr Energy transaction is dated February 2008 by a contemporaneous April 2008 report, while a transaction database gives December 17, 2008; the acquisition year is clear but the exact closing month is inconsistent across public records.","No definitive retirement date or major repowering is identified. A 2021 plant report stated that Commonwealth Chesapeake had not made major changes to its seven turbines, although clutch-related foundation and coupling modifications were made for units 4–7."] — Double Duty · confidence: high - Quality notes: ["Current EIA and owner records identify the plant as operational as of August 2, 2026, while a secondary plant-tracker record labels it mothballed; the status should therefore be read with source-date and source-quality context.","Capacity figures use different bases: current EIA data reports 402.5 MW of nameplate capacity, while historical project reporting describes 315 MW of combined net output.","The Tyr Energy transaction is dated February 2008 by a contemporaneous April 2008 report, while a transaction database gives December 17, 2008; the acquisition year is clear but the exact closing month is inconsistent across public records.","No definitive retirement date or major repowering is identified. A 2021 plant report stated that Commonwealth Chesapeake had not made major changes to its seven turbines, although clutch-related foundation and coupling modifications were made for units 4–7."] — Spinning Reserve: Commonwealth Chesapeake gives LM6000s double duty · confidence: high - Quality notes: ["Current EIA and owner records identify the plant as operational as of August 2, 2026, while a secondary plant-tracker record labels it mothballed; the status should therefore be read with source-date and source-quality context.","Capacity figures use different bases: current EIA data reports 402.5 MW of nameplate capacity, while historical project reporting describes 315 MW of combined net output.","The Tyr Energy transaction is dated February 2008 by a contemporaneous April 2008 report, while a transaction database gives December 17, 2008; the acquisition year is clear but the exact closing month is inconsistent across public records.","No definitive retirement date or major repowering is identified. A 2021 plant report stated that Commonwealth Chesapeake had not made major changes to its seven turbines, although clutch-related foundation and coupling modifications were made for units 4–7."] — Tenaska Powers Up Fund II · confidence: high - Quality notes: ["Current EIA and owner records identify the plant as operational as of August 2, 2026, while a secondary plant-tracker record labels it mothballed; the status should therefore be read with source-date and source-quality context.","Capacity figures use different bases: current EIA data reports 402.5 MW of nameplate capacity, while historical project reporting describes 315 MW of combined net output.","The Tyr Energy transaction is dated February 2008 by a contemporaneous April 2008 report, while a transaction database gives December 17, 2008; the acquisition year is clear but the exact closing month is inconsistent across public records.","No definitive retirement date or major repowering is identified. A 2021 plant report stated that Commonwealth Chesapeake had not made major changes to its seven turbines, although clutch-related foundation and coupling modifications were made for units 4–7."] — Tyr Energy Acquires Commonwealth Chesapeake Co · confidence: high - Financing summary: Tenaska Capital Management signed a mid-January 2005 agreement to acquire the plant from TECO Energy for $89 million. TECO Energy reported that the sale closed on April 19, 2005, with $90.2 million of net proceeds after working-capital and transaction-related adjustments. Tyr Energy's later acquisition amount from Tenaska was not disclosed. Separately, GE Energy Financial Services led the arrangement of non-recourse project debt for Tyr's wholly owned Commonwealth Chesapeake Company project in 2008; the debt amount, lender group, and detailed financing terms were not disclosed. — Double Duty · confidence: medium - Timeline: [{"event":"Phased construction and first commercial operation","date":"2000","detail":"The first three GE LM6000 simple-cycle units entered commercial service in 2000. Contemporary reporting states that phase-one foundations had been poured and equipment installed as the units approached startup."},{"event":"Second phase added and commercial operation completed","date":"2001","detail":"Four additional LM6000 units were added in 2001, bringing the facility to seven generating units."},{"event":"Tenaska acquisition agreement","date":"2005-01","detail":"Tenaska Capital Management signed an agreement in mid-January 2005 to acquire Commonwealth Chesapeake from TECO Energy for $89 million; the transaction was expected to close by the end of March."},{"event":"Clutch and grid-service expansion","date":"2005-02","detail":"Four of the seven LM6000 turbines were fitted with SSS clutches so the generators could remain synchronized while the turbines were on standby and qualify for PJM spinning-reserve service. The modification required expanded foundations, additional footing clearance, and shaft couplings."},{"event":"TECO Energy sale completed","date":"2005-04-19","detail":"An indirect TECO Energy subsidiary completed the sale of its membership interests in Commonwealth Chesapeake Company, the owner of the power station, to an affiliate of Tenaska Power Fund, L.P.; TECO reported $90.2 million of net proceeds."},{"event":"Tyr Energy acquisition","date":"2008-02","detail":"A contemporaneous April 2008 report stated that Tenaska exited the Virginia oil-fired plant in February 2008 by selling it to Tyr Energy. A separate transaction database lists December 17, 2008, so the exact closing month is not consistent across public records."},{"event":"Non-recourse project financing","date":"2008","detail":"GE Energy Financial Services led the arrangement of non-recourse debt for Tyr's wholly owned Commonwealth Chesapeake Company project in New Church, Virginia. The financing amount and lender group were not disclosed."},{"event":"Repowering assessment","date":"2021-02-19","detail":"A plant report stated that Commonwealth Chesapeake had not undertaken major changes to its seven turbines and had not added clutches to the remaining three units because four clutched units were sufficient for spinning-reserve requirements."},{"event":"Reported current operating status","date":"2026-08-02","detail":"Current EIA-based plant data and Tyr Energy's asset-management listing identify Commonwealth Chesapeake as operational; no definitive retirement date is identified."}] — Double Duty · confidence: medium - Timeline: [{"event":"Phased construction and first commercial operation","date":"2000","detail":"The first three GE LM6000 simple-cycle units entered commercial service in 2000. Contemporary reporting states that phase-one foundations had been poured and equipment installed as the units approached startup."},{"event":"Second phase added and commercial operation completed","date":"2001","detail":"Four additional LM6000 units were added in 2001, bringing the facility to seven generating units."},{"event":"Tenaska acquisition agreement","date":"2005-01","detail":"Tenaska Capital Management signed an agreement in mid-January 2005 to acquire Commonwealth Chesapeake from TECO Energy for $89 million; the transaction was expected to close by the end of March."},{"event":"Clutch and grid-service expansion","date":"2005-02","detail":"Four of the seven LM6000 turbines were fitted with SSS clutches so the generators could remain synchronized while the turbines were on standby and qualify for PJM spinning-reserve service. The modification required expanded foundations, additional footing clearance, and shaft couplings."},{"event":"TECO Energy sale completed","date":"2005-04-19","detail":"An indirect TECO Energy subsidiary completed the sale of its membership interests in Commonwealth Chesapeake Company, the owner of the power station, to an affiliate of Tenaska Power Fund, L.P.; TECO reported $90.2 million of net proceeds."},{"event":"Tyr Energy acquisition","date":"2008-02","detail":"A contemporaneous April 2008 report stated that Tenaska exited the Virginia oil-fired plant in February 2008 by selling it to Tyr Energy. A separate transaction database lists December 17, 2008, so the exact closing month is not consistent across public records."},{"event":"Non-recourse project financing","date":"2008","detail":"GE Energy Financial Services led the arrangement of non-recourse debt for Tyr's wholly owned Commonwealth Chesapeake Company project in New Church, Virginia. The financing amount and lender group were not disclosed."},{"event":"Repowering assessment","date":"2021-02-19","detail":"A plant report stated that Commonwealth Chesapeake had not undertaken major changes to its seven turbines and had not added clutches to the remaining three units because four clutched units were sufficient for spinning-reserve requirements."},{"event":"Reported current operating status","date":"2026-08-02","detail":"Current EIA-based plant data and Tyr Energy's asset-management listing identify Commonwealth Chesapeake as operational; no definitive retirement date is identified."}] — Tenaska Powers Up Fund II · confidence: medium - Timeline: [{"event":"Phased construction and first commercial operation","date":"2000","detail":"The first three GE LM6000 simple-cycle units entered commercial service in 2000. Contemporary reporting states that phase-one foundations had been poured and equipment installed as the units approached startup."},{"event":"Second phase added and commercial operation completed","date":"2001","detail":"Four additional LM6000 units were added in 2001, bringing the facility to seven generating units."},{"event":"Tenaska acquisition agreement","date":"2005-01","detail":"Tenaska Capital Management signed an agreement in mid-January 2005 to acquire Commonwealth Chesapeake from TECO Energy for $89 million; the transaction was expected to close by the end of March."},{"event":"Clutch and grid-service expansion","date":"2005-02","detail":"Four of the seven LM6000 turbines were fitted with SSS clutches so the generators could remain synchronized while the turbines were on standby and qualify for PJM spinning-reserve service. The modification required expanded foundations, additional footing clearance, and shaft couplings."},{"event":"TECO Energy sale completed","date":"2005-04-19","detail":"An indirect TECO Energy subsidiary completed the sale of its membership interests in Commonwealth Chesapeake Company, the owner of the power station, to an affiliate of Tenaska Power Fund, L.P.; TECO reported $90.2 million of net proceeds."},{"event":"Tyr Energy acquisition","date":"2008-02","detail":"A contemporaneous April 2008 report stated that Tenaska exited the Virginia oil-fired plant in February 2008 by selling it to Tyr Energy. A separate transaction database lists December 17, 2008, so the exact closing month is not consistent across public records."},{"event":"Non-recourse project financing","date":"2008","detail":"GE Energy Financial Services led the arrangement of non-recourse debt for Tyr's wholly owned Commonwealth Chesapeake Company project in New Church, Virginia. The financing amount and lender group were not disclosed."},{"event":"Repowering assessment","date":"2021-02-19","detail":"A plant report stated that Commonwealth Chesapeake had not undertaken major changes to its seven turbines and had not added clutches to the remaining three units because four clutched units were sufficient for spinning-reserve requirements."},{"event":"Reported current operating status","date":"2026-08-02","detail":"Current EIA-based plant data and Tyr Energy's asset-management listing identify Commonwealth Chesapeake as operational; no definitive retirement date is identified."}] — Tyr Energy Acquires Commonwealth Chesapeake Co · confidence: medium - Timeline: [{"event":"Phased construction and first commercial operation","date":"2000","detail":"The first three GE LM6000 simple-cycle units entered commercial service in 2000. Contemporary reporting states that phase-one foundations had been poured and equipment installed as the units approached startup."},{"event":"Second phase added and commercial operation completed","date":"2001","detail":"Four additional LM6000 units were added in 2001, bringing the facility to seven generating units."},{"event":"Tenaska acquisition agreement","date":"2005-01","detail":"Tenaska Capital Management signed an agreement in mid-January 2005 to acquire Commonwealth Chesapeake from TECO Energy for $89 million; the transaction was expected to close by the end of March."},{"event":"Clutch and grid-service expansion","date":"2005-02","detail":"Four of the seven LM6000 turbines were fitted with SSS clutches so the generators could remain synchronized while the turbines were on standby and qualify for PJM spinning-reserve service. The modification required expanded foundations, additional footing clearance, and shaft couplings."},{"event":"TECO Energy sale completed","date":"2005-04-19","detail":"An indirect TECO Energy subsidiary completed the sale of its membership interests in Commonwealth Chesapeake Company, the owner of the power station, to an affiliate of Tenaska Power Fund, L.P.; TECO reported $90.2 million of net proceeds."},{"event":"Tyr Energy acquisition","date":"2008-02","detail":"A contemporaneous April 2008 report stated that Tenaska exited the Virginia oil-fired plant in February 2008 by selling it to Tyr Energy. A separate transaction database lists December 17, 2008, so the exact closing month is not consistent across public records."},{"event":"Non-recourse project financing","date":"2008","detail":"GE Energy Financial Services led the arrangement of non-recourse debt for Tyr's wholly owned Commonwealth Chesapeake Company project in New Church, Virginia. The financing amount and lender group were not disclosed."},{"event":"Repowering assessment","date":"2021-02-19","detail":"A plant report stated that Commonwealth Chesapeake had not undertaken major changes to its seven turbines and had not added clutches to the remaining three units because four clutched units were sufficient for spinning-reserve requirements."},{"event":"Reported current operating status","date":"2026-08-02","detail":"Current EIA-based plant data and Tyr Energy's asset-management listing identify Commonwealth Chesapeake as operational; no definitive retirement date is identified."}] — Spinning Reserve: Commonwealth Chesapeake gives LM6000s double duty · confidence: medium - Quality notes.0: Current EIA and owner records identify the plant as operational as of August 2, 2026, while a secondary plant-tracker record labels it mothballed; the status should therefore be read with source-date and source-quality context. — Source · confidence: high - Quality notes.1: Capacity figures use different bases: current EIA data reports 402.5 MW of nameplate capacity, while historical project reporting describes 315 MW of combined net output. — Double Duty · confidence: high - Quality notes.2: The Tyr Energy transaction is dated February 2008 by a contemporaneous April 2008 report, while a transaction database gives December 17, 2008; the acquisition year is clear but the exact closing month is inconsistent across public records. — Tenaska Powers Up Fund II · confidence: high - Quality notes.2: The Tyr Energy transaction is dated February 2008 by a contemporaneous April 2008 report, while a transaction database gives December 17, 2008; the acquisition year is clear but the exact closing month is inconsistent across public records. — Tyr Energy Acquires Commonwealth Chesapeake Co · confidence: high - Quality notes.3: No definitive retirement date or major repowering is identified. A 2021 plant report stated that Commonwealth Chesapeake had not made major changes to its seven turbines, although clutch-related foundation and coupling modifications were made for units 4–7. — Spinning Reserve: Commonwealth Chesapeake gives LM6000s double duty · confidence: medium - Timeline.0: {"event":"Phased construction and first commercial operation","date":"2000","detail":"The first three GE LM6000 simple-cycle units entered commercial service in 2000. Contemporary reporting states that phase-one foundations had been poured and equipment installed as the units approached startup."} — Double Duty · confidence: high - Timeline.1: {"event":"Second phase added and commercial operation completed","date":"2001","detail":"Four additional LM6000 units were added in 2001, bringing the facility to seven generating units."} — Spinning Reserve: Commonwealth Chesapeake gives LM6000s double duty · confidence: high - Timeline.2: {"event":"Tenaska acquisition agreement","date":"2005-01","detail":"Tenaska Capital Management signed an agreement in mid-January 2005 to acquire Commonwealth Chesapeake from TECO Energy for $89 million; the transaction was expected to close by the end of March."} — Double Duty · confidence: high - Timeline.3: {"event":"Clutch and grid-service expansion","date":"2005-02","detail":"Four of the seven LM6000 turbines were fitted with SSS clutches so the generators could remain synchronized while the turbines were on standby and qualify for PJM spinning-reserve service. The modification required expanded foundations, additional footing clearance, and shaft couplings."} — Spinning Reserve: Commonwealth Chesapeake gives LM6000s double duty · confidence: medium - Timeline.5: {"event":"Tyr Energy acquisition","date":"2008-02","detail":"A contemporaneous April 2008 report stated that Tenaska exited the Virginia oil-fired plant in February 2008 by selling it to Tyr Energy. A separate transaction database lists December 17, 2008, so the exact closing month is not consistent across public records."} — Tenaska Powers Up Fund II · confidence: medium - Timeline.5: {"event":"Tyr Energy acquisition","date":"2008-02","detail":"A contemporaneous April 2008 report stated that Tenaska exited the Virginia oil-fired plant in February 2008 by selling it to Tyr Energy. A separate transaction database lists December 17, 2008, so the exact closing month is not consistent across public records."} — Tyr Energy Acquires Commonwealth Chesapeake Co · confidence: medium - Timeline.7: {"event":"Repowering assessment","date":"2021-02-19","detail":"A plant report stated that Commonwealth Chesapeake had not undertaken major changes to its seven turbines and had not added clutches to the remaining three units because four clutched units were sufficient for spinning-reserve requirements."} — Spinning Reserve: Commonwealth Chesapeake gives LM6000s double duty · confidence: medium - Commercial parties.3: {"relationship":"2005 buyer and 2008 historical seller","name":"Tenaska Capital Management / Tenaska Power Fund affiliate","detail":"Tenaska acquired the project from TECO Energy in 2005; TECO's annual report identifies the buyer as an affiliate of Tenaska Power Fund, while trade reporting identifies Tenaska Capital Management. Tenaska later sold the project to Tyr Energy.","official_url":"https://tenaskacapital.com/"} — Tenaska Powers Up Fund II · confidence: medium - Commercial parties.5: {"relationship":"Operations and maintenance provider","name":"North American Energy Services (NAES)","detail":"Tyr Energy brought in NAES to operate and maintain the facility after its acquisition.","official_url":"https://www.naes.com/"} — Spinning Reserve: Commonwealth Chesapeake gives LM6000s double duty · confidence: high - Commercial parties.6: {"relationship":"Combustion-turbine OEM","name":"GE / GE Vernova","detail":"The plant consists of GE LM6000 aeroderivative combustion turbines. The LM6000 product page is the official OEM product source.","official_url":"https://www.gevernova.com/gas-power/products/gas-turbines/lm6000"} — Double Duty · confidence: high - Commercial parties.6: {"relationship":"Combustion-turbine OEM","name":"GE / GE Vernova","detail":"The plant consists of GE LM6000 aeroderivative combustion turbines. The LM6000 product page is the official OEM product source.","official_url":"https://www.gevernova.com/gas-power/products/gas-turbines/lm6000"} — LM6000 Aeroderivative Gas Turbine · confidence: high - Commercial parties.8: {"relationship":"Balancing authority / RTO and market","name":"PJM Interconnection, LLC","detail":"Commonwealth Chesapeake operates in the PJM market and provides standby and spinning-reserve services to the regional grid.","official_url":"https://www.pjm.com/"} — Spinning Reserve: Commonwealth Chesapeake gives LM6000s double duty · confidence: high - Resource type: GEN — Source · confidence: medium ## Timeline - 2000 — Phased construction and first commercial operation The first three GE LM6000 simple-cycle units entered commercial service in 2000. Contemporary reporting states that phase-one foundations had been poured and equipment installed as the units approached startup. Source: Double Duty (https://www.power-eng.com/coal/double-duty/) - 2001 — Second phase added and commercial operation completed Four additional LM6000 units were added in 2001, bringing the facility to seven generating units. Source: Double Duty (https://www.power-eng.com/coal/double-duty/) - 2005-01 — Tenaska acquisition agreement Tenaska Capital Management signed an agreement in mid-January 2005 to acquire Commonwealth Chesapeake from TECO Energy for $89 million; the transaction was expected to close by the end of March. Source: Double Duty (https://www.power-eng.com/coal/double-duty/) ## Sources - [MBR | Index](https://mbrweb.ferc.gov/SearchlkpEIA/Index?page=242) — mbrweb.ferc.gov · tier regulatory - [Sheet1](https://www.pjm.com/-/media/DotCom/markets-ops/energy/day-ahead/valid-bidding-locations-for-virtual-bids.xls) — pjm.com · tier other - [Spinning Reserve: Commonwealth Chesapeake gives LM6000s double duty](https://www.turbomachinerymag.com/view/spinning-reserve-commonwealth-chesapeake-gives-lm6000s-double-duty) — turbomachinerymag.com · tier other - [LM6000 Aeroderivative Gas Turbine](https://www.gevernova.com/gas-power/products/gas-turbines/lm6000) — gevernova.com · tier other - [Commonwealth Chesapeake power station](https://www.gem.wiki/Commonwealth_Chesapeake_power_station) — gem.wiki · tier other - [Commonwealth of Virginia VIRGINIA DEPARTMENT OF ENVIRONMENTAL QUALITY](https://www.deq.virginia.gov/home/showpublisheddocument/5897/638223278504670000) — deq.virginia.gov · tier regulatory - [Double Duty](https://www.power-eng.com/coal/double-duty/) — power-eng.com · tier other - [Source](https://gem.wiki/Commonwealth_Chesapeake_power_station) — gem.wiki · tier other - [Tenaska Powers Up Fund II](https://www.buyoutsinsider.com/tenaska-powers-up-fund-ii/) — buyoutsinsider.com · tier other - [Tyr Energy Acquires Commonwealth Chesapeake Co](https://mergr.com/transaction/tyr-energy-acquires-commonwealth-chesapeake-co) — mergr.com · tier other - [ITOCHU Corporation and General Electric company entered into Renewable Energy Investment collaboration agreement | GE News](https://www.ge.com/news/press-releases/itochu-corporation-and-general-electric-company-entered-into-renewable-energy) — ge.com · tier other - [Tyr Energy Purchases Half of Fox Energy Project in Wisconsin From GE - Tyr Energy](https://tyrenergy.com/tyr-energy-purchases-half-of-fox-energy-project-in-wisconsin-from-ge/) — tyrenergy.com · tier other - [Source](https://turbomachinerymag.com/view/spinning-reserve-commonwealth-chesapeake-gives-lm6000s-double-duty) — turbomachinerymag.com · tier other - [Federal Register :: Commonwealth Chesapeake Company, L.L.C., et al.; Electric Rate and Corporate Regulation Filings](https://www.federalregister.gov/documents/2002/09/16/02-23453/commonwealth-chesapeake-company-llc-et-al-electric-rate-and-corporate-regulation-filings) — federalregister.gov · tier regulatory - [Source](https://www.monitoringanalytics.com/reports/Market_Messages/RPM_Material/IMM_Notice_re_RPM_Must_Offer_Obligations_20240716.pdf) — monitoringanalytics.com · tier other ## Data quality - Current EIA and owner records identify the plant as operational as of August 2, 2026, while a secondary plant-tracker record labels it mothballed; the status should therefore be read with source-date and source-quality context. Capacity figures use different bases: current EIA data reports 402.5 MW of nameplate capacity, while historical project reporting describes 315 MW of combined net output. No definitive retirement date or major repowering is identified. A 2021 plant report stated that Commonwealth Chesapeake had not made major changes to its seven turbines, although clutch-related foundation and coupling modifications were made for units 4–7. --- Canonical page: https://askthegrid.com/assets/facilities/commonwealth-chesapeake Source: Ask the Grid — https://askthegrid.com/