# Darby Power, LLC

PJM Natural Gas Fired Combustion Turbine · https://askthegrid.com/assets/facilities/darby-power-llc

Darby Power, LLC is a natural gas-fired power facility with 564 MW of EIA-reported nameplate capacity in Pickaway County, Ohio, registered as EIA Plant ID 55247. The plant's generating configuration is six natural-gas/oil-fired combustion turbines. Commercial operation began on May 1, 2001. The facility interconnects at ADKINS 13.8 KV at 13.8 kV.
ADKINS 13.8 KV · 13.8 kV · AEP Transmission.

## Key facts

- Technology: Natural Gas Fired Combustion Turbine
- Power capacity: 564 MW
- Operating status: operating

## Grid and market context

- ISO/RTO: PJM
- Balancing authority: PJM Interconnection, LLC
- Interconnection voltage: 13.8 kV

## Source-backed facts

- Owner logo domain: talenenergy.com — Darby Generating Station - Talen Energy · confidence: medium
- Identifiers: [{"value":"55247","system":"EIA plant ID"},{"value":"61134","system":"EIA utility ID"},{"value":"ER17-256-000","system":"FERC docket"},{"value":"PJM","system":"ISO/RTO"},{"value":"PJM-AEP","system":"PJM market location"},{"value":"Adkins 13.8 Kv","system":"PJM/EIA LMP node"},{"value":"R15","system":"PJM interconnection queue ID"},{"value":"Darby Generation Station Units 1-6 (R15)","system":"PJM queue project"},{"value":"GT1","system":"EIA generator ID"},{"value":"GT2","system":"EIA generator ID"},{"value":"GT3","system":"EIA generator ID"},{"value":"GT4","system":"EIA generator ID"},{"value":"GT5","system":"EIA generator ID"},{"value":"GT6","system":"EIA generator ID"},{"value":"P0139249","system":"Ohio EPA permit/action ID"}] — Darby Electric Generating Station · confidence: medium
- Official project url: https://www.talenenergy.com/plant/darby-generating-station/ — Darby Generating Station - Talen Energy · confidence: high
- Owner name: Talen Energy — Darby Generating Station - Talen Energy · confidence: medium
- Owner name: Talen Energy — Talen Energy Completes Acquisition of High-Quality Western · confidence: medium
- Description: Darby Power, LLC (EIA plant 55247) is located at 12509 Adkins Road, Mount Sterling, Ohio, in Pickaway County. It is a natural-gas/oil combustion-turbine facility with six gas turbines, commercial operation beginning in 2001, and a PJM-AEP market location. Talen Energy’s official project page lists 456 MW of owned generating capacity; plant generator records list six 94-MW units, or 564 MW nameplate. — Darby Generating Station - Talen Energy · confidence: medium
- Parties: [{"relationship":"Current owner","name":"Talen Energy","official_url":"https://www.talenenergy.com/"},{"relationship":"Registered plant/utility entity","name":"Darby Power, LLC","official_url":null},{"relationship":"Seller in 2026 acquisition","name":"Energy Capital Partners","official_url":null},{"relationship":"Former owner before the 2026 acquisition","name":"Lightstone Generation LLC","official_url":null},{"relationship":"Previous operator, 2013–2016","name":"AEP Generation Resources Inc","official_url":null}] — Darby Generating Station - Talen Energy · confidence: medium
- Parties: [{"relationship":"Current owner","name":"Talen Energy","official_url":"https://www.talenenergy.com/"},{"relationship":"Registered plant/utility entity","name":"Darby Power, LLC","official_url":null},{"relationship":"Seller in 2026 acquisition","name":"Energy Capital Partners","official_url":null},{"relationship":"Former owner before the 2026 acquisition","name":"Lightstone Generation LLC","official_url":null},{"relationship":"Previous operator, 2013–2016","name":"AEP Generation Resources Inc","official_url":null}] — Talen Energy Continues Portfolio Expansion with Acquisition of Additional High-Quality PJM Natural Gas Assets from Energy Capital Partners | Thu, 01/15/2026 - 07:00 · confidence: medium
- Identifiers.4: {"value":"PJM-AEP","system":"PJM market location"} — Darby Generating Station - Talen Energy · confidence: high
- Identifiers.14: {"value":"P0139249","system":"Ohio EPA permit/action ID"} — Darby Electric Generating Station · confidence: medium
- Parties.0: {"relationship":"Current owner","name":"Talen Energy","official_url":"https://www.talenenergy.com/"} — Darby Generating Station - Talen Energy · confidence: high
- Parties.2: {"relationship":"Seller in 2026 acquisition","name":"Energy Capital Partners","official_url":null} — Talen Energy Continues Portfolio Expansion with Acquisition of Additional High-Quality PJM Natural Gas Assets from Energy Capital Partners | Thu, 01/15/2026 - 07:00 · confidence: medium
- Unit configuration: Six natural-gas/oil-fired combustion turbines — Source · confidence: high
- Commercial operation date: 2001-05 — Source · confidence: medium
- Unit count: 6 — Source · confidence: high
- Product url: https://www.gevernova.com/gas-power/products/gas-turbines/7e — 7E Gas Turbine (7E.03) | GE Vernova · confidence: high
- Kind: thermal — AEP to purchase Darby Generating Station from DPL Energy, LLC · confidence: high
- Product family: 7E Gas Turbine (7E.03) — 7E Gas Turbine (7E.03) | GE Vernova · confidence: high
- Significance: Darby is a PJM-AEP peaking facility whose simple-cycle gas turbines provide commercial flexibility and grid reliability support; AEP described the plant as helping maintain the 15% reserve margin required by PJM. Talen’s current portfolio page lists six turbines and 456 MW of owned capacity. — AEP to purchase Darby Generating Station from DPL Energy, LLC · confidence: medium
- Description: Darby Power, LLC is a six-unit natural-gas/oil combustion-turbine station near Mount Sterling in Pickaway County, Ohio, serving the PJM-AEP market. Talen Energy currently lists 100% ownership and 456 MW of owned generating capacity; plant records separately list six 94-MW units, or 564 MW of nameplate capacity. The facility entered commercial operation in May 2001, with the initial four units commissioned in 2001 and Units 5 and 6 commissioned in 2002. DPL Energy agreed to sell the project to AEP in November 2006; AEP later sold it to Lightstone Generation in January 2017, and Talen acquired it from Energy Capital Partners in June 2026 as part of a three-asset portfolio transaction. — Darby Generating Station - Talen Energy · confidence: medium
- Description: Darby Power, LLC is a six-unit natural-gas/oil combustion-turbine station near Mount Sterling in Pickaway County, Ohio, serving the PJM-AEP market. Talen Energy currently lists 100% ownership and 456 MW of owned generating capacity; plant records separately list six 94-MW units, or 564 MW of nameplate capacity. The facility entered commercial operation in May 2001, with the initial four units commissioned in 2001 and Units 5 and 6 commissioned in 2002. DPL Energy agreed to sell the project to AEP in November 2006; AEP later sold it to Lightstone Generation in January 2017, and Talen acquired it from Energy Capital Partners in June 2026 as part of a three-asset portfolio transaction. — Source · confidence: medium
- Description: Darby Power, LLC is a six-unit natural-gas/oil combustion-turbine station near Mount Sterling in Pickaway County, Ohio, serving the PJM-AEP market. Talen Energy currently lists 100% ownership and 456 MW of owned generating capacity; plant records separately list six 94-MW units, or 564 MW of nameplate capacity. The facility entered commercial operation in May 2001, with the initial four units commissioned in 2001 and Units 5 and 6 commissioned in 2002. DPL Energy agreed to sell the project to AEP in November 2006; AEP later sold it to Lightstone Generation in January 2017, and Talen acquired it from Energy Capital Partners in June 2026 as part of a three-asset portfolio transaction. — AEP Completes Sale of Four Competitive Power Plants · confidence: medium
- Quality notes: ["Capacity figures use different conventions: Talen lists 456 MW of owned capacity, Ohio regulatory and transaction sources cite approximately 480–507 MW, and a plant profile describes six 94-MW units totaling 564 MW nameplate.","The PJM R15 record identifies a 9-MW interconnection project completed on 2007-05-01; this should not be treated as proof of a new generating unit or a plant repowering.","No retirement or repowering milestone was identified in the reviewed owner, regulatory, and transaction sources."] — Darby Generating Station - Talen Energy · confidence: medium
- Quality notes: ["Capacity figures use different conventions: Talen lists 456 MW of owned capacity, Ohio regulatory and transaction sources cite approximately 480–507 MW, and a plant profile describes six 94-MW units totaling 564 MW nameplate.","The PJM R15 record identifies a 9-MW interconnection project completed on 2007-05-01; this should not be treated as proof of a new generating unit or a plant repowering.","No retirement or repowering milestone was identified in the reviewed owner, regulatory, and transaction sources."] — Power plant profile: Darby Electric Generating Station, US · confidence: medium
- Financing summary: The disclosed amounts are transaction consideration or portfolio-level financing rather than Darby-specific project financing. AEP’s November 2006 agreement to acquire Darby from DPL Energy was approximately $102 million. AEP’s January 2017 sale of four plants, including Darby, to Lightstone Generation closed for approximately $2.1 billion; the September 2016 agreement had been announced at approximately $2.17 billion. Talen announced a $3.45 billion acquisition of Darby, Waterford, and Lawrenceburg from ECP on 2026-01-15, comprising approximately $2.55 billion in cash and $900 million in Talen stock. In April 2026, Talen Energy Supply issued $1.5 billion of 6.125% senior unsecured notes due 2031 and $2.5 billion of 6.375% senior unsecured notes due 2033, intending to use the proceeds to fund the Cornerstone Acquisition; no standalone Darby construction or project-finance facility was disclosed. — AEP Completes Sale of Four Competitive Power Plants · confidence: medium
- Financing summary: The disclosed amounts are transaction consideration or portfolio-level financing rather than Darby-specific project financing. AEP’s November 2006 agreement to acquire Darby from DPL Energy was approximately $102 million. AEP’s January 2017 sale of four plants, including Darby, to Lightstone Generation closed for approximately $2.1 billion; the September 2016 agreement had been announced at approximately $2.17 billion. Talen announced a $3.45 billion acquisition of Darby, Waterford, and Lawrenceburg from ECP on 2026-01-15, comprising approximately $2.55 billion in cash and $900 million in Talen stock. In April 2026, Talen Energy Supply issued $1.5 billion of 6.125% senior unsecured notes due 2031 and $2.5 billion of 6.375% senior unsecured notes due 2033, intending to use the proceeds to fund the Cornerstone Acquisition; no standalone Darby construction or project-finance facility was disclosed. — Talen Energy Continues Portfolio Expansion with Acquisition of Additional High-Quality PJM Natural Gas Assets from Energy Capital Partners | Thu, 01/15/2026 - 07:00 · confidence: medium
- Timeline.0: {"event":"Project development announced","date":"1999","detail":"Dayton Power & Light announced the Darby project to address projected electricity shortages."} — Darby Generating Station - Wikipedia · confidence: medium
- Timeline.1: {"event":"Construction and initial commercial operation","date":"2001-05-01","detail":"Ohio’s gas-generation case-status record lists Darby’s operational date as May 1, 2001. The first four units entered operation in 2001; Industrial Construction is identified as EPC contractor and GE Power as turbine supplier for the six-unit project."} — Source · confidence: medium
- Timeline.1: {"event":"Construction and initial commercial operation","date":"2001-05-01","detail":"Ohio’s gas-generation case-status record lists Darby’s operational date as May 1, 2001. The first four units entered operation in 2001; Industrial Construction is identified as EPC contractor and GE Power as turbine supplier for the six-unit project."} — Power plant profile: Darby Electric Generating Station, US · confidence: medium
- Timeline.2: {"event":"Completion of second phase","date":"2002","detail":"Units 5 and 6 are recorded as entering operation in May 2002."} — Darby Generating Station - Wikipedia · confidence: medium
- Timeline.4: {"event":"AEP ownership begins","date":"2007","detail":"Historical plant records state that DPL sold Darby to AEP in 2007. — Darby Generating Station - Wikipedia · confidence: medium
- Timeline.6: {"event":"AEP sale agreement announced","date":"2016-09-14","detail":"AEP announced an agreement to sell four competitive plants, including the approximately 507-MW Darby Generating Station, to Lightstone Generation, a joint venture of Blackstone and an ArcLight affiliate, for approximately $2.17 billion."} — AEP To Sell Four Competitive Power Plants To Blackstone And ArcLight Joint Venture · confidence: high
- Timeline.7: {"event":"Sale to Lightstone Generation completed","date":"2017-01-30","detail":"AEP completed the sale of the four-plant portfolio, including Darby, to Lightstone Generation for approximately $2.1 billion."} — AEP Completes Sale of Four Competitive Power Plants · confidence: high
- Timeline.8: {"event":"Talen acquisition announced","date":"2026-01-15","detail":"Talen announced its agreement to acquire Darby, Waterford, and Lawrenceburg from Energy Capital Partners for $3.45 billion, consisting of approximately $2.55 billion in cash and $900 million in Talen equity."} — Talen Energy Continues Portfolio Expansion with Acquisition of Additional High-Quality PJM Natural Gas Assets from Energy Capital Partners | Thu, 01/15/2026 - 07:00 · confidence: high
- Commercial parties.0: {"relationship":"Current owner","name":"Talen Energy","detail":"Talen’s official portfolio page lists 100% ownership of Darby Generating Station and 456 MW of owned generating capacity.","official_url":"https://www.talenenergy.com/"} — Darby Generating Station - Talen Energy · confidence: high
- Commercial parties.2: {"relationship":"Seller in 2026 portfolio acquisition","name":"Energy Capital Partners","detail":"ECP and its affiliates sold Darby, Waterford, and Lawrenceburg to Talen in the $3.45 billion Cornerstone Acquisition completed in June 2026.","official_url":"https://www.ecpgp.com/"} — Source · confidence: high
- Commercial parties.3: {"relationship":"Former owner and 2017 buyer","name":"Lightstone Generation LLC","detail":"Lightstone Generation acquired Darby as part of AEP’s four-plant sale; it was a joint venture of Blackstone and an ArcLight affiliate.","official_url":null} — AEP Completes Sale of Four Competitive Power Plants · confidence: high
- Commercial parties.4: {"relationship":"Former owner, 2017 seller, and 2007 buyer through subsidiary","name":"American Electric Power","detail":"AEP’s Columbus Southern Power subsidiary agreed to acquire Darby from DPL Energy in 2006, and AEP later sold Darby to Lightstone Generation in January 2017.","official_url":"https://www.aep.com/"} — AEP Completes Sale of Four Competitive Power Plants · confidence: high
- Commercial parties.6: {"relationship":"2017 Lightstone joint-venture sponsor","name":"Blackstone","detail":"Blackstone was one of the two private-equity sponsors of Lightstone Generation, the buyer in AEP’s 2017 portfolio sale.","official_url":"https://www.blackstone.com/"} — AEP Completes Sale of Four Competitive Power Plants · confidence: high
- Commercial parties.7: {"relationship":"2017 Lightstone joint-venture sponsor","name":"ArcLight Capital Partners","detail":"An ArcLight affiliate was the other private-equity sponsor of Lightstone Generation in the 2017 acquisition from AEP.","official_url":"https://arclight.com/"} — Home - arclight · confidence: medium
- Commercial parties.7: {"relationship":"2017 Lightstone joint-venture sponsor","name":"ArcLight Capital Partners","detail":"An ArcLight affiliate was the other private-equity sponsor of Lightstone Generation in the 2017 acquisition from AEP.","official_url":"https://arclight.com/"} — AEP Completes Sale of Four Competitive Power Plants · confidence: medium
- Status date: 2026-08-02 — Source · confidence: medium
- Transmission owner: AEP Transmission — Reliability Analysis Update · confidence: medium

## Timeline

- 1999 — Project development announced
  Dayton Power & Light announced the Darby project to address projected electricity shortages.
  Source: Darby Generating Station - Wikipedia (https://en.wikipedia.org/wiki/Darby_Generating_Station)
- 2001-05-01 — Construction and initial commercial operation
  Ohio’s gas-generation case-status record lists Darby’s operational date as May 1, 2001. The first four units entered operation in 2001; Industrial Construction is identified as EPC contractor and GE Power as turbine supplier for the six-unit project.
  Source: Source (https://dam.assets.ohio.gov/image/upload/puco.ohio.gov/empliibrary/files/OPA/Mapping/OPSB/Solar%20Facilities%20Map/Natural_Gas_Map_and_Stats.pdf)
- 2006-11-29 — AEP acquisition agreement
  AEP’s Columbus Southern Power subsidiary agreed to purchase Darby from DPL Energy, LLC, a DPL Inc. subsidiary, for approximately $102 million. The transaction was expected to close in the first half of 2007.
  Source: AEP to purchase Darby Generating Station from DPL Energy, LLC (https://www.aep.com/news/stories/view/879/AEP-to-purchase-Darby-Generating-Station-from-DPL-Energy-LLC/)
- 2007 — AEP ownership begins
  Historical plant records state that DPL sold Darby to AEP in 2007.
  Source: Darby Generating Station - Wikipedia (https://en.wikipedia.org/wiki/Darby_Generating_Station)
- 2016-09-14 — AEP sale agreement announced
  AEP announced an agreement to sell four competitive plants, including the approximately 507-MW Darby Generating Station, to Lightstone Generation, a joint venture of Blackstone and an ArcLight affiliate, for approximately $2.17 billion.
  Source: AEP Completes Sale of Four Competitive Power Plants (https://www.prnewswire.com/news-releases/aep-completes-sale-of-four-competitive-power-plants-300398721.html)
- 2026-04 — Acquisition financing arranged
  Talen Energy Supply issued $1.5 billion of 6.125% senior unsecured notes due 2031 and $2.5 billion of 6.375% senior unsecured notes due 2033 to fund the Cornerstone Acquisition and redeem existing secured notes.
  Source: Talen Energy Reports First Quarter 2026 Results, Reaffirms 2026 Guidance | Tue, 05/05/2026 - 16:05 (https://ir.talenenergy.com/news-releases/news-release-details/talen-energy-reports-first-quarter-2026-results-reaffirms-2026/)
- 2026-06-15 — Talen acquisition completed
  Talen completed its acquisition of Darby, Waterford, and Lawrenceburg from ECP. ECP received 2.4 million Talen shares and approximately $2.55 billion in cash.
  Source: Talen Energy Completes Acquisition of High-Quality Western PJM Ge (https://natlawreview.com/press-releases/talen-energy-completes-acquisition-high-quality-western-pjm-generation)

## Sources

- [Darby Generating Station - Talen Energy](https://www.talenenergy.com/plant/darby-generating-station/) — talenenergy.com · tier other
- [Darby Electric Generating Station](https://ohioepa.commentinput.com/?id=ksb5MDgVf) — ohioepa.commentinput.com · tier other
- [Talen Energy Completes Acquisition of High-Quality Western](https://www.globenewswire.com/news-release/2026/06/15/3312132/0/en/talen-energy-completes-acquisition-of-high-quality-western-pjm-generation-assets.html) — globenewswire.com · tier other
- [Talen Energy Continues Portfolio Expansion with Acquisition of Additional High-Quality PJM Natural Gas Assets from Energy Capital Partners | Thu, 01/15/2026 - 07:00](https://ir.talenenergy.com/news-releases/news-release-details/talen-energy-continues-portfolio-expansion-acquisition) — ir.talenenergy.com · tier other
- [Source](https://talenenergy.com/plant/darby-generating-station) — talenenergy.com · tier other
- [Power plant profile: Darby Electric Generating Station, US](https://www.power-technology.com/data-insights/power-plant-profile-darby-electric-generating-station-us/) — power-technology.com · tier other
- [7E Gas Turbine (7E.03) | GE Vernova](https://www.gevernova.com/gas-power/products/gas-turbines/7e) — gevernova.com · tier other
- [AEP to purchase Darby Generating Station from DPL Energy, LLC](https://www.aep.com/news/stories/view/879/AEP-to-purchase-Darby-Generating-Station-from-DPL-Energy-LLC/) — aep.com · tier other
- [Source](https://dam.assets.ohio.gov/image/upload/puco.ohio.gov/empliibrary/files/OPA/Mapping/OPSB/Solar%20Facilities%20Map/Natural_Gas_Map_and_Stats.pdf) — dam.assets.ohio.gov · tier regulatory
- [AEP Completes Sale of Four Competitive Power Plants](https://www.prnewswire.com/news-releases/aep-completes-sale-of-four-competitive-power-plants-300398721.html) — prnewswire.com · tier other
- [Talen Energy Reports First Quarter 2026 Results, Reaffirms 2026 Guidance | Tue, 05/05/2026 - 16:05](https://ir.talenenergy.com/news-releases/news-release-details/talen-energy-reports-first-quarter-2026-results-reaffirms-2026/) — ir.talenenergy.com · tier other
- [Talen Energy Completes Acquisition of High-Quality Western PJM Ge](https://natlawreview.com/press-releases/talen-energy-completes-acquisition-high-quality-western-pjm-generation) — natlawreview.com · tier other
- [Darby Generating Station - Wikipedia](https://en.wikipedia.org/wiki/Darby_Generating_Station) — en.wikipedia.org · tier other
- [AEP To Sell Four Competitive Power Plants To Blackstone And ArcLight Joint Venture](https://www.prnewswire.com/news-releases/aep-to-sell-four-competitive-power-plants-to-blackstone-and-arclight-joint-venture-300327839.html) — prnewswire.com · tier other
- [Source](https://ecpgp.com/about/news-and-insights/press-releases/2026/-energy-capital-partners--ecp--agrees-to-sell-additional-high-qu) — ecpgp.com · tier other
- [Home - arclight](https://arclight.com/) — arclight.com · tier other
- [Constructability & Cost Analysis Report](https://www.pjm.com/-/media/DotCom/committees-groups/committees/teac/2026/20260106/20260106-2025-rtep-window-1-constructability-and-cost-analysis-report.pdf) — pjm.com · tier other
- [Reliability Analysis Update](https://www.pjm.com/-/media/DotCom/committees-groups/committees/teac/2024/20241203/20241203-item-11---reliability-analysis-update.pdf) — pjm.com · tier other

## Data quality

- Capacity figures use different conventions: Talen lists 456 MW of owned capacity, Ohio regulatory and transaction sources cite approximately 480–507 MW, and a plant profile describes six 94-MW units totaling 564 MW nameplate. The PJM R15 record identifies a 9-MW interconnection project completed on May 1, 2007; this should not be treated as proof of a new generating unit or a plant repowering. No retirement or repowering milestone was identified in the reviewed owner, regulatory, and transaction sources.

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