# MPH Elwood

PJM Natural Gas Fired Combustion Turbine · https://askthegrid.com/assets/facilities/mph-elwood

MPH Elwood is a natural gas-fired power facility with 768 MW of EIA-reported nameplate capacity in Will County, Illinois, registered as EIA Plant ID 69979. Elwood was described as one of the largest independent peaking power facilities in the United States.

## Key facts

- Technology: Natural Gas Fired Combustion Turbine
- Power capacity: 768 MW
- Operating status: operating
- Retirement: 2026-07

## Grid and market context

- ISO/RTO: PJM
- Balancing authority: PJM Interconnection, LLC
- Substation: Elwood Substation
- Point of interconnection: Elwood Substation
- Transmission owner: ComEd
- Interconnection voltage: 345 kV

## Source-backed facts

- Owner logo domain: milepostpower.com — Portfolio — Milepost Power Holdings · confidence: medium
- Owner name: MPH Elwood, LLC — Electric Power Monthly - U.S. Energy Information Administration (EIA) · confidence: medium
- Description: MPH Elwood is an operating natural-gas simple-cycle combustion-turbine power plant in Will County, Illinois. EIA identifies the facility as plant 69979 under entity 67818, and its registry records associate it with PJM Interconnection. The plant's records list generators GT1 through GT4, each with 192 MW of nameplate capacity, and an initial operation date of July 1999. — Electric Power Monthly - U.S. Energy Information Administration (EIA) · confidence: medium
- Description: MPH Elwood is an operating natural-gas simple-cycle combustion-turbine power plant in Will County, Illinois. EIA identifies the facility as plant 69979 under entity 67818, and its registry records associate it with PJM Interconnection. The plant's records list generators GT1 through GT4, each with 192 MW of nameplate capacity, and an initial operation date of July 1999. — NPDES Permit No. IL0080300 Notice No. 25090901.docx Public Notice Beginning Date: December 10, 2025 Public Notice Ending Date: January 9, · confidence: medium
- Canonical name: MPH Elwood — Electric Power Monthly - U.S. Energy Information Administration (EIA) · confidence: high
- Identifiers.0: {"value":"69979","system":"EIA plant ID"} — Electric Power Monthly - U.S. Energy Information Administration (EIA) · confidence: high
- Identifiers.1: {"value":"67818","system":"EIA entity ID"} — Electric Power Monthly - U.S. Energy Information Administration (EIA) · confidence: high
- Identifiers.2: {"value":"GT1, GT2, GT3, GT4","system":"EIA generator IDs"} — Electric Power Monthly - U.S. Energy Information Administration (EIA) · confidence: medium
- Identifiers.4: {"value":"GT1: 900 ELWO18 KV EL-1; GT2: 900 ELWO18 KV EL-2; GT3: 900 ELWO18 KV EL-3; GT4: 900 ELWO18 KV EL-4","system":"PJM RTO/ISO location designations"} — Sheet1 · confidence: medium
- Identifiers.7: {"value":"IL0080300","system":"Illinois EPA NPDES permit"} — NPDES Permit No. IL0080300 Notice No. 25090901.docx Public Notice Beginning Date: December 10, 2025 Public Notice Ending Date: January 9, · confidence: high
- Parties.0: {"relationship":"Owner and operator","name":"MPH Elwood, LLC","official_url":"https://www.milepostpower.com/about"} — Electric Power Monthly - U.S. Energy Information Administration (EIA) · confidence: medium
- Parties.0: {"relationship":"Owner and operator","name":"MPH Elwood, LLC","official_url":"https://www.milepostpower.com/about"} — NPDES Permit No. IL0080300 Notice No. 25090901.docx Public Notice Beginning Date: December 10, 2025 Public Notice Ending Date: January 9, · confidence: medium
- Parties.1: {"relationship":"Portfolio owner / parent platform","name":"Milepost Power Holdings","official_url":"https://www.milepostpower.com/about"} — Portfolio — Milepost Power Holdings · confidence: medium
- Product url: https://www.gevernova.com/gas-power/products/gas-turbines/7f — 7F Heavy Duty Gas Turbine | 7F.04/7F.05 | GE Vernova · confidence: high
- Manufacturer domain: gevernova.com — Elwood Energy - J-Power USA · confidence: medium
- Manufacturer domain: gevernova.com — 7F Heavy Duty Gas Turbine | 7F.04/7F.05 | GE Vernova · confidence: medium
- Product family: GE Frame 7FA — Elwood Energy - J-Power USA · confidence: medium
- Product family: GE Frame 7FA — 7F Heavy Duty Gas Turbine | 7F.04/7F.05 | GE Vernova · confidence: medium
- Manufacturer name: General Electric (GE) — Elwood Energy - J-Power USA · confidence: medium
- Equipment models.0: {"manufacturer_domain":"gevernova.com","product_url":"https://www.gevernova.com/gas-power/products/gas-turbines/7f","count":6,"unit_mw":192,"name":"GE Frame 7FA combustion turbine"} — 7F Heavy Duty Gas Turbine | 7F.04/7F.05 | GE Vernova · confidence: medium
- Significance: Elwood was described as one of the largest independent peaking power facilities in the United States. Its location beside multiple interstate gas pipelines and a high-capacity ComEd transmission corridor supported access to Midwest wholesale electricity markets. — Peoples Energy, Dominion complete financing of Elwood Power Plant · confidence: medium
- Quality notes: ["Capacity figures reflect different asset scopes: the EIA plant record identifies MPH Elwood plant 69979, Milepost Power describes its acquired Elwood asset as 1,020 MW with six turbines, and J-POWER USA describes the historical Elwood Energy site as 1,350 MW with nine turbines. These figures should not be combined without a unit-level reconciliation.","Dairyland Power Cooperative announced a March 2026 purchase of three 450-MW combustion turbines from J-POWER USA at the Elwood site. The available record does not identify those units as part of MPH Elwood's acquired assets, so that transaction is not treated as a sale of the MPH Elwood asset.","No retirement or repowering milestone is identified; the EIA operating record lists the plant as operating. The disclosed 2025 acquisition consideration and any acquisition-specific debt terms were not reported."] — Source · confidence: medium
- Quality notes: ["Capacity figures reflect different asset scopes: the EIA plant record identifies MPH Elwood plant 69979, Milepost Power describes its acquired Elwood asset as 1,020 MW with six turbines, and J-POWER USA describes the historical Elwood Energy site as 1,350 MW with nine turbines. These figures should not be combined without a unit-level reconciliation.","Dairyland Power Cooperative announced a March 2026 purchase of three 450-MW combustion turbines from J-POWER USA at the Elwood site. The available record does not identify those units as part of MPH Elwood's acquired assets, so that transaction is not treated as a sale of the MPH Elwood asset.","No retirement or repowering milestone is identified; the EIA operating record lists the plant as operating. The disclosed 2025 acquisition consideration and any acquisition-specific debt terms were not reported."] — Elwood Energy - J-Power USA · confidence: medium
- Quality notes: ["Capacity figures reflect different asset scopes: the EIA plant record identifies MPH Elwood plant 69979, Milepost Power describes its acquired Elwood asset as 1,020 MW with six turbines, and J-POWER USA describes the historical Elwood Energy site as 1,350 MW with nine turbines. These figures should not be combined without a unit-level reconciliation.","Dairyland Power Cooperative announced a March 2026 purchase of three 450-MW combustion turbines from J-POWER USA at the Elwood site. The available record does not identify those units as part of MPH Elwood's acquired assets, so that transaction is not treated as a sale of the MPH Elwood asset.","No retirement or repowering milestone is identified; the EIA operating record lists the plant as operating. The disclosed 2025 acquisition consideration and any acquisition-specific debt terms were not reported."] — Gas power financing in focus | PFI · confidence: medium
- Commercial parties.1: {"relationship":"Portfolio owner and parent platform","name":"Milepost Power Holdings","detail":"Milepost Power owns and manages the Elwood asset within its natural-gas generation portfolio.","official_url":"https://www.milepostpower.com/about"} — Source · confidence: medium
- Quality notes.2: No retirement or repowering milestone is identified; the EIA operating record lists the plant as operating. The disclosed 2025 acquisition consideration and any acquisition-specific debt terms were not reported. — Energy Deals for June 2025 · confidence: medium
- Quality notes.0: Capacity figures reflect different asset scopes: the EIA plant record identifies MPH Elwood plant 69979, Milepost Power describes its acquired Elwood asset as 1,020 MW with six turbines, and J-POWER USA describes the historical Elwood Energy site as 1,350 MW with nine turbines. These figures should not be combined without a unit-level reconciliation. — Source · confidence: medium
- Quality notes.0: Capacity figures reflect different asset scopes: the EIA plant record identifies MPH Elwood plant 69979, Milepost Power describes its acquired Elwood asset as 1,020 MW with six turbines, and J-POWER USA describes the historical Elwood Energy site as 1,350 MW with nine turbines. These figures should not be combined without a unit-level reconciliation. — Elwood Energy - J-Power USA · confidence: medium
- Quality notes.1: Dairyland Power Cooperative announced a March 2026 purchase of three 450-MW combustion turbines from J-POWER USA at the Elwood site. The available record does not identify those units as part of MPH Elwood's acquired assets, so that transaction is not treated as a sale of the MPH Elwood asset. — Gas power financing in focus | PFI · confidence: medium
- Timeline.1: {"event":"Initial commercial operation","date":"1999-07","detail":"The original four-turbine, approximately 600-MW merchant facility entered service in July 1999."} — Dominion, Peoples Plan Expansion for Elwood Plant · confidence: medium
- Timeline.1: {"event":"Initial commercial operation","date":"1999-07","detail":"The original four-turbine, approximately 600-MW merchant facility entered service in July 1999."} — Peoples Energy, Dominion complete financing of Elwood Power Plant · confidence: medium
- Timeline.2: {"event":"Expansion construction commenced","date":"2000-10","detail":"Construction of the expanded project commenced in October 2000."} — Elwood Energy, Exelon Generation sign long-term PPA · confidence: high

## Timeline

- 2000-10 — Expansion construction commenced
  Construction of the expanded project commenced in October 2000.
  Source: Elwood Energy, Exelon Generation sign long-term PPA (https://www.power-eng.com/gas/elwood-energy-exelon-generation-sign-long-term-ppa/)
- 2001-10-30 — Original project bond financing closed
  Elwood Energy closed a $402 million, 25-year bond issuance backed primarily by cash flows from three power sales agreements.
  Source: Peoples Energy, Dominion complete financing of Elwood Power Plant (https://www.power-eng.com/operations-maintenance/peoples-energy-dominion-complete-financing-of-elwood-power-plant/)

## Sources

- [Portfolio — Milepost Power Holdings](https://www.milepostpower.com/about) — milepostpower.com · tier other
- [Electric Power Monthly - U.S. Energy Information Administration (EIA)](https://www.eia.gov/electricity/monthly/epm_table_grapher.php?t=epmt_6_06) — eia.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
- [NPDES Permit No. IL0080300 Notice No. 25090901.docx Public Notice Beginning Date: December 10, 2025 Public Notice Ending Date: January 9,](https://webapps.illinois.gov/EPA/WebSiteApi/api/PublicNotices/GetDocument/34962) — webapps.illinois.gov · tier regulatory
- [Elwood Energy - J-Power USA](https://www.jpowerusa.com/projects/elwood-energy/) — jpowerusa.com · tier other
- [7F Heavy Duty Gas Turbine | 7F.04/7F.05 | GE Vernova](https://www.gevernova.com/gas-power/products/gas-turbines/7f) — gevernova.com · tier other
- [Peoples Energy, Dominion complete financing of Elwood Power Plant](https://www.power-eng.com/operations-maintenance/peoples-energy-dominion-complete-financing-of-elwood-power-plant/) — power-eng.com · tier other
- [Elwood Energy - J-Power USA](https://www.jpowerusa.com/projects/elwood-energy) — jpowerusa.com · tier other
- [Source](https://milepostpower.com/about) — milepostpower.com · tier other
- [Gas power financing in focus | PFI](https://www.pfie.com/americas/2250055/gas-power-financing-in-focus) — pfie.com · tier other
- [Energy Deals for June 2025](https://www.cookma.com/app/uploads/2025/07/PE-Deals-Energy-June-2025.pdf) — cookma.com · tier other
- [Elwood Energy, Exelon Generation sign long-term PPA](https://www.power-eng.com/gas/elwood-energy-exelon-generation-sign-long-term-ppa/) — power-eng.com · tier other
- [Dominion, Peoples Plan Expansion for Elwood Plant](https://naturalgasintel.com/news/dominion-peoples-plan-expansion-for-elwood-plant/) — naturalgasintel.com · tier other
- [Final Review and Recommendation 2023 RTEP Proposal Window 1 - Cluster No. 2](https://www.pjm.com/-/media/DotCom/committees-groups/committees/teac/2024/20240305/20240305-final-review-and-recommendation---2023-rtep-window-1----cluster-2.pdf) — pjm.com · tier other

## Data quality

- Capacity figures reflect different asset scopes: the EIA plant record identifies MPH Elwood plant 69979, Milepost Power describes its acquired Elwood asset as 1,020 MW with six turbines, and J-POWER USA describes the historical Elwood Energy site as 1,350 MW with nine turbines. These figures should not be combined without a unit-level reconciliation. Dairyland Power Cooperative announced a March 2026 purchase of three 450-MW combustion turbines from J-POWER USA at the Elwood site. The available record does not identify those units as part of MPH Elwood's acquired assets, so that transaction is not treated as a sale of the MPH Elwood asset. No retirement or repowering milestone is identified; the EIA operating record lists the plant as operating. The disclosed 2025 acquisition consideration and any acquisition-specific debt terms were not reported.

---

Canonical page: https://askthegrid.com/assets/facilities/mph-elwood

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