# Invenergy Nelson Expansion LLC

PJM Natural Gas Fired Combustion Turbine · https://askthegrid.com/assets/facilities/invenergy-nelson-expansion-llc

Invenergy Nelson Expansion LLC is a natural gas-fired power facility with 380 MW of EIA-reported nameplate capacity in Lee County, Illinois, registered as EIA Plant ID 60387. Invenergy Services LLC owns and operates the plant. The plant's generating configuration is two 190-MW natural-gas-fired combustion-turbine generators, GEN3 and GEN4 and 380 MW total nameplate capacity. The facility interconnects at COMED at 345 kV.
COMED · 345 kV · Commonwealth Edison Co.

## Key facts

- Technology: Natural Gas Fired Combustion Turbine
- Power capacity: 380 MW
- Operating status: operating

## Grid and market context

- ISO/RTO: PJM
- Balancing authority: PJM Interconnection, LLC
- Interconnection voltage: 345 kV

## Source-backed facts

- Owner logo domain: invenergy.com — Invenergy | Energy Innovation. Trusted Execution. · confidence: medium
- Official project url: https://invenergy.com/projects/case-studies/nelson-energy-center — Invenergy | Nelson Energy Center · confidence: medium
- Description: Invenergy Nelson Expansion LLC is an operating natural-gas-fired combustion-turbine plant in Lee County, Illinois, at 1311 Nelson Road, Rock Falls. The plant has two 190-MW generators, GEN3 and GEN4, for 380 MW of total nameplate capacity; both began operating in April 2023. It operates in the PJM market and is the 380-MW expansion of Invenergy’s Nelson Energy Center. — Invenergy | Nelson Energy Center · confidence: medium
- Parties: [{"relationship":"owner and operator","name":"Invenergy Services LLC","official_url":"https://invenergy.com"},{"relationship":"developer and parent operator","name":"Invenergy","official_url":"https://invenergy.com"},{"relationship":"project entity and permittee","name":"Invenergy Nelson Expansion LLC","official_url":"https://invenergy.com"}] — Invenergy Announces Start of Commercial Operation of Nelson Energy Ce… · confidence: medium
- Parties: [{"relationship":"owner and operator","name":"Invenergy Services LLC","official_url":"https://invenergy.com"},{"relationship":"developer and parent operator","name":"Invenergy","official_url":"https://invenergy.com"},{"relationship":"project entity and permittee","name":"Invenergy Nelson Expansion LLC","official_url":"https://invenergy.com"}] — Illinois EPA Approves Permit for 380-MW Expansion of Invenergy Nelson Plant · confidence: medium
- Identifiers.0: {"value":"60387","system":"EIA plant ID"} — Invenergy | Energy Innovation. Trusted Execution. · confidence: medium
- Identifiers.5: {"value":"C011533","system":"FERC company identifier (CID)"} — MBR | Asset Appendix Report · confidence: high
- Identifiers.7: {"value":"ER22-2144-001","system":"FERC docket"} — Combined Filings · confidence: high
- Parties.1: {"relationship":"developer and parent operator","name":"Invenergy","official_url":"https://invenergy.com"} — Invenergy | Nelson Energy Center · confidence: medium
- Parties.1: {"relationship":"developer and parent operator","name":"Invenergy","official_url":"https://invenergy.com"} — Invenergy Announces Start of Commercial Operation of Nelson Energy Ce… · confidence: medium
- Parties.2: {"relationship":"project entity and permittee","name":"Invenergy Nelson Expansion LLC","official_url":"https://invenergy.com"} — Illinois EPA Approves Permit for 380-MW Expansion of Invenergy Nelson Plant · confidence: high
- Product url: https://www.gevernova.com/gas-power/products/gas-turbines/7f — 7F Heavy Duty Gas Turbine | 7F.04/7F.05 · confidence: medium
- Manufacturer domain: gevernova.com — 7F Heavy Duty Gas Turbine | 7F.04/7F.05 · confidence: medium
- Significance: Invenergy Nelson Expansion is a 380-MW, dual-fueled simple-cycle gas-turbine facility in the PJM market. It consists of two nominal 190-MW peaking units and has 951,780 gallons of on-site fuel storage; S&P Global Ratings estimated that the expansion represented approximately 12% of Invenergy Thermal Operating I LLC’s portfolio cash flow. — Illinois EPA Approves Permit for 380-MW Expansion of Invenergy Nelson Plant · confidence: medium
- Description: Invenergy Nelson Expansion LLC is an operating natural-gas-fired combustion-turbine plant at 1311 Nelson Road in Rock Falls, Lee County, Illinois. The EIA plant comprises generators GEN3 and GEN4, totaling 380 MW, and operates in the PJM balancing area. The expansion uses two simple-cycle units designed for dual-fuel operation with natural gas and ultra-low-sulfur diesel. Invenergy Services LLC operates the facility, while upstream ownership records identify Invenergy and an InfraBridge affiliate as the principal ownership interests. Construction activity was underway in 2022, and the expansion achieved commercial operations in 2023. — Illinois EPA Approves Permit for 380-MW Expansion of Invenergy Nelson Plant · confidence: medium
- Description: Invenergy Nelson Expansion LLC is an operating natural-gas-fired combustion-turbine plant at 1311 Nelson Road in Rock Falls, Lee County, Illinois. The EIA plant comprises generators GEN3 and GEN4, totaling 380 MW, and operates in the PJM balancing area. The expansion uses two simple-cycle units designed for dual-fuel operation with natural gas and ultra-low-sulfur diesel. Invenergy Services LLC operates the facility, while upstream ownership records identify Invenergy and an InfraBridge affiliate as the principal ownership interests. Construction activity was underway in 2022, and the expansion achieved commercial operations in 2023. — Invenergy | Nelson Energy Center · confidence: medium
- Quality notes: ["The 2004 acquisition involved the partially completed original Nelson facility and its property, not a separately documented acquisition of the later 380-MW EIA plant 60387 expansion.","The original Nelson project’s December 2013 construction and term-loan financing is not treated as financing for EIA plant 60387; the disclosed 2025 debt transaction is a portfolio-level refinancing that included Nelson Expansion but did not allocate proceeds to it.","Commercial-operation dating is not fully uniform: EIA and plant records identify initial operation in April 2023, while a January 2025 New York filing lists May 20, 2023 and 397.8 MW for the expansion. The common supported year is 2023.","ArcLight’s proposed purchase of InfraBridge’s stake was announced in March 2026, with financial terms undisclosed and closing expected in the second half of 2026; the evidence does not establish that the sale had closed by August 2, 2026."] — ArcLight to Acquire InfraBridge’s 50% Stake in 5.4 GW Power Portfolio - InfraBridge · confidence: medium
- Timeline: [{"event":"Predecessor owner entered bankruptcy","date":"2003","detail":"LSP-Nelson Energy filed for bankruptcy and did not complete the original power-generation facility."},{"event":"Invenergy acquired predecessor property and partially completed facility","date":"2004","detail":"Invenergy purchased the property from the LSP-Nelson Energy bankruptcy estate. This was the predecessor/site acquisition for the original Nelson project, not a separately documented acquisition of the later EIA plant 60387 expansion."},{"event":"Original Nelson construction resumed","date":"2013","detail":"Invenergy resumed construction of the original natural-gas combined-cycle Nelson project; the original facility later achieved commercial operation in May 2015."},{"event":"Expansion permit application","date":"2015-06","detail":"Illinois EPA received Invenergy’s application to construct two peaking units at Nelson Energy Center."},{"event":"Expansion construction","date":"2022","detail":"Invenergy’s official project history states that construction of the 380-MW Nelson expansion was underway in 2022."},{"event":"Expansion generators entered operation","date":"2023-04","detail":"EIA and plant records identify initial operation of Invenergy Nelson Expansion LLC in April 2023. FERC’s asset appendix lists GEN3 and GEN4 under the expansion and records a control-transfer date of April 20, 2023."},{"event":"Portfolio refinancing proposed","date":"2025-04-30","detail":"S&P Global Ratings reported a proposed $725 million term loan B and $50 million term loan C for Invenergy Thermal Operating I LLC. The portfolio included Nelson Expansion; the transaction was not presented as project-specific financing for NEX."},{"event":"Upstream ownership-transfer filing","date":"2026-02-27","detail":"A Section 203 filing covered Invenergy Nelson Expansion LLC among the assets subject to an upstream ownership change."},{"event":"Proposed sale of InfraBridge stake","date":"2026-03","detail":"ArcLight Capital Partners agreed to acquire InfraBridge’s 50% stake in Invenergy AMPCI Thermal Power, a portfolio including Nelson-related assets. Financial terms were undisclosed and closing was expected in the second half of 2026; the evidence does not establish a completed closing by August 2, 2026."}] — Invenergy | Nelson Energy Center · confidence: medium
- Timeline: [{"event":"Predecessor owner entered bankruptcy","date":"2003","detail":"LSP-Nelson Energy filed for bankruptcy and did not complete the original power-generation facility."},{"event":"Invenergy acquired predecessor property and partially completed facility","date":"2004","detail":"Invenergy purchased the property from the LSP-Nelson Energy bankruptcy estate. This was the predecessor/site acquisition for the original Nelson project, not a separately documented acquisition of the later EIA plant 60387 expansion."},{"event":"Original Nelson construction resumed","date":"2013","detail":"Invenergy resumed construction of the original natural-gas combined-cycle Nelson project; the original facility later achieved commercial operation in May 2015."},{"event":"Expansion permit application","date":"2015-06","detail":"Illinois EPA received Invenergy’s application to construct two peaking units at Nelson Energy Center."},{"event":"Expansion construction","date":"2022","detail":"Invenergy’s official project history states that construction of the 380-MW Nelson expansion was underway in 2022."},{"event":"Expansion generators entered operation","date":"2023-04","detail":"EIA and plant records identify initial operation of Invenergy Nelson Expansion LLC in April 2023. FERC’s asset appendix lists GEN3 and GEN4 under the expansion and records a control-transfer date of April 20, 2023."},{"event":"Portfolio refinancing proposed","date":"2025-04-30","detail":"S&P Global Ratings reported a proposed $725 million term loan B and $50 million term loan C for Invenergy Thermal Operating I LLC. The portfolio included Nelson Expansion; the transaction was not presented as project-specific financing for NEX."},{"event":"Upstream ownership-transfer filing","date":"2026-02-27","detail":"A Section 203 filing covered Invenergy Nelson Expansion LLC among the assets subject to an upstream ownership change."},{"event":"Proposed sale of InfraBridge stake","date":"2026-03","detail":"ArcLight Capital Partners agreed to acquire InfraBridge’s 50% stake in Invenergy AMPCI Thermal Power, a portfolio including Nelson-related assets. Financial terms were undisclosed and closing was expected in the second half of 2026; the evidence does not establish a completed closing by August 2, 2026."}] — Illinois EPA Approves Permit for 380-MW Expansion of Invenergy Nelson Plant · confidence: medium
- Timeline: [{"event":"Predecessor owner entered bankruptcy","date":"2003","detail":"LSP-Nelson Energy filed for bankruptcy and did not complete the original power-generation facility."},{"event":"Invenergy acquired predecessor property and partially completed facility","date":"2004","detail":"Invenergy purchased the property from the LSP-Nelson Energy bankruptcy estate. This was the predecessor/site acquisition for the original Nelson project, not a separately documented acquisition of the later EIA plant 60387 expansion."},{"event":"Original Nelson construction resumed","date":"2013","detail":"Invenergy resumed construction of the original natural-gas combined-cycle Nelson project; the original facility later achieved commercial operation in May 2015."},{"event":"Expansion permit application","date":"2015-06","detail":"Illinois EPA received Invenergy’s application to construct two peaking units at Nelson Energy Center."},{"event":"Expansion construction","date":"2022","detail":"Invenergy’s official project history states that construction of the 380-MW Nelson expansion was underway in 2022."},{"event":"Expansion generators entered operation","date":"2023-04","detail":"EIA and plant records identify initial operation of Invenergy Nelson Expansion LLC in April 2023. FERC’s asset appendix lists GEN3 and GEN4 under the expansion and records a control-transfer date of April 20, 2023."},{"event":"Portfolio refinancing proposed","date":"2025-04-30","detail":"S&P Global Ratings reported a proposed $725 million term loan B and $50 million term loan C for Invenergy Thermal Operating I LLC. The portfolio included Nelson Expansion; the transaction was not presented as project-specific financing for NEX."},{"event":"Upstream ownership-transfer filing","date":"2026-02-27","detail":"A Section 203 filing covered Invenergy Nelson Expansion LLC among the assets subject to an upstream ownership change."},{"event":"Proposed sale of InfraBridge stake","date":"2026-03","detail":"ArcLight Capital Partners agreed to acquire InfraBridge’s 50% stake in Invenergy AMPCI Thermal Power, a portfolio including Nelson-related assets. Financial terms were undisclosed and closing was expected in the second half of 2026; the evidence does not establish a completed closing by August 2, 2026."}] — ArcLight to Acquire InfraBridge’s 50% Stake in 5.4 GW Power Portfolio - InfraBridge · confidence: medium
- Commercial parties: [{"relationship":"project entity and permittee","name":"Invenergy Nelson Expansion LLC","detail":"Legal project entity associated with EIA plant 60387 and its two expansion generators, GEN3 and GEN4.","official_url":"https://invenergy.com"},{"relationship":"operator","name":"Invenergy Services LLC","detail":"Operator identified in EIA and plant records for Invenergy Nelson Expansion LLC.","official_url":"https://invenergy.com"},{"relationship":"developer and upstream owner","name":"Invenergy","detail":"Developed the Nelson site, acquired the predecessor property in 2004, resumed the original project’s construction, and later completed the 380-MW expansion.","official_url":"https://invenergy.com"},{"relationship":"upstream portfolio owner","name":"Invenergy Clean Power LLC","detail":"S&P Global Ratings identified Invenergy Clean Power LLC as one of the two ultimate owners of Invenergy Thermal Operating I LLC, the portfolio holding entity whose assets included Nelson Expansion.","official_url":"https://invenergy.com"},{"relationship":"co-owner and proposed seller","name":"InfraBridge","detail":"An InfraBridge affiliate was identified as holding an interest exceeding 10% in Nelson Expansion, while broader portfolio records identify a 50% InfraBridge interest. InfraBridge agreed in March 2026 to sell its 50% stake in Invenergy AMPCI Thermal Power to ArcLight, subject to closing conditions.","official_url":"https://www.infrabridge.com"},{"relationship":"proposed buyer","name":"ArcLight Capital Partners","detail":"Agreed in March 2026 to acquire InfraBridge’s 50% stake in the jointly owned Invenergy AMPCI Thermal Power portfolio, with closing expected in the second half of 2026 and financial terms undisclosed.","official_url":"https://arclight.com"},{"relationship":"predecessor owner and bankruptcy-estate seller","name":"LSP-Nelson Energy","detail":"Original owner of the partially completed Nelson facility and property; its bankruptcy estate sold the property to Invenergy in 2004.","official_url":null}] — ArcLight to Acquire InfraBridge’s 50% Stake in 5.4 GW Power Portfolio - InfraBridge · confidence: medium
- Timeline.0: {"event":"Predecessor owner entered bankruptcy","date":"2003","detail":"LSP-Nelson Energy filed for bankruptcy and did not complete the original power-generation facility."} — Illinois EPA Approves Permit for 380-MW Expansion of Invenergy Nelson Plant · confidence: medium
- Commercial parties.6: {"relationship":"predecessor owner and bankruptcy-estate seller","name":"LSP-Nelson Energy","detail":"Original owner of the partially completed Nelson facility and property; its bankruptcy estate sold the property to Invenergy in 2004.","official_url":null} — ArcLight to Acquire InfraBridge’s 50% Stake in 5.4 GW Power Portfolio - InfraBridge · confidence: medium
- Timeline.2: {"event":"Original Nelson construction resumed","date":"2013","detail":"Invenergy resumed construction of the original natural-gas combined-cycle Nelson project; the original facility later achieved commercial operation in May 2015."} — Invenergy | Nelson Energy Center · confidence: medium
- Timeline.3: {"event":"Expansion permit application","date":"2015-06","detail":"Illinois EPA received Invenergy’s application to construct two peaking units at Nelson Energy Center."} — Illinois EPA Approves Permit for 380-MW Expansion of Invenergy Nelson Plant · confidence: medium
- Timeline.4: {"event":"Expansion construction","date":"2022","detail":"Invenergy’s official project history states that construction of the 380-MW Nelson expansion was underway in 2022."} — Invenergy | Nelson Energy Center · confidence: high
- Timeline.8: {"event":"Proposed sale of InfraBridge stake","date":"2026-03","detail":"ArcLight Capital Partners agreed to acquire InfraBridge’s 50% stake in Invenergy AMPCI Thermal Power, a portfolio including Nelson-related assets. Financial terms were undisclosed and closing was expected in the second half of 2026; the evidence does not establish a completed closing by August 2, 2026."} — ArcLight to Acquire InfraBridge’s 50% Stake in 5.4 GW Power Portfolio - InfraBridge · confidence: medium
- Commercial parties.2: {"relationship":"developer and upstream owner","name":"Invenergy","detail":"Developed the Nelson site, acquired the predecessor property in 2004, resumed the original project’s construction, and later completed the 380-MW expansion.","official_url":"https://invenergy.com"} — Invenergy | Nelson Energy Center · confidence: medium
- Commercial parties.5: {"relationship":"proposed buyer","name":"ArcLight Capital Partners","detail":"Agreed in March 2026 to acquire InfraBridge’s 50% stake in the jointly owned Invenergy AMPCI Thermal Power portfolio, with closing expected in the second half of 2026 and financial terms undisclosed.","official_url":"https://arclight.com"} — ArcLight to Acquire InfraBridge’s 50% Stake in 5.4 GW Power Portfolio - InfraBridge · confidence: medium
- Status detail: The exact EIA plant is operating: the EIA-based record reports 2 operational generators totaling 380 MW, and Invenergy states that the 380-MW expansion achieved commercial operations in 2023. The adjacent Sauk Valley clean-hydrogen project began commercial operations in March 2025 and supplies hydrogen used as a turbine-generator cooling agent; this is not a fuel conversion or repowering of the plant. — Invenergy | Nelson Energy Center · confidence: medium
- Operating status: operating — Invenergy | Nelson Energy Center · confidence: medium

## Timeline

- 2004 — Invenergy acquired predecessor property and partially completed facility
  Invenergy purchased the property from the LSP-Nelson Energy bankruptcy estate. This was the predecessor/site acquisition for the original Nelson project, not a separately documented acquisition of the later EIA plant 60387 expansion.
  Source: Invenergy | Nelson Energy Center (https://wwww.invenergy.com/projects/case-studies/nelson-energy-center)
- 2013 — Original Nelson construction resumed
  Invenergy resumed construction of the original natural-gas combined-cycle Nelson project; the original facility later achieved commercial operation in May 2015.
  Source: Invenergy | Nelson Energy Center (https://wwww.invenergy.com/projects/case-studies/nelson-energy-center)
- 2015-06 — Expansion permit application
  Illinois EPA received Invenergy’s application to construct two peaking units at Nelson Energy Center.
  Source: Illinois EPA Approves Permit for 380-MW Expansion of Invenergy Nelson Plant (https://www.power-eng.com/environmental-emissions/illinois-epa-approves-permit-for-380-mw-expansion-of-invenergy-nelson-plant)
- 2022 — Expansion construction
  Invenergy’s official project history states that construction of the 380-MW Nelson expansion was underway in 2022.
  Source: Invenergy | Nelson Energy Center (https://wwww.invenergy.com/projects/case-studies/nelson-energy-center)
- 2023-05-20 — Commercial operation
  Invenergy Nelson Expansion LLC entered commercial operation.
  Source: Source (https://www.monitoringanalytics.com/filings/2025/IMM_Comments_Opp_Settle_Docket_No_ER24-2166_20250327.pdf)

## Sources

- [Invenergy | Energy Innovation. Trusted Execution.](https://invenergy.com/) — invenergy.com · tier other
- [MBR | Asset Appendix Report](https://mbrweb.ferc.gov/SearchMBRAssetAppendix/AssetAppendixDetails?page=2&AssetAppendixId=6595) — mbrweb.ferc.gov · tier regulatory
- [Combined Filings](https://www.regulations.gov/document/FERC-2022-0851-0001) — regulations.gov · tier regulatory
- [Invenergy | Nelson Energy Center](https://wwww.invenergy.com/projects/case-studies/nelson-energy-center) — wwww.invenergy.com · tier other
- [Invenergy Announces Start of Commercial Operation of Nelson Energy Ce…](https://invenergy.com/news/invenergy-announces-start-of-commercial-operation-of-nelson-energy-center-in-illinois) — invenergy.com · tier other
- [Illinois EPA Approves Permit for 380-MW Expansion of Invenergy Nelson Plant](https://www.power-eng.com/environmental-emissions/illinois-epa-approves-permit-for-380-mw-expansion-of-invenergy-nelson-plant/) — power-eng.com · tier other
- [Nelson power plant begins operations](https://www.shawlocal.com/2015/05/18/nelson-power-plant-begins-operations/ap39kfh/) — shawlocal.com · tier other
- [Source](https://www.monitoringanalytics.com/filings/2025/IMM_Comments_Opp_Settle_Docket_No_ER24-2166_20250327.pdf) — monitoringanalytics.com · tier other
- [Source](https://power-eng.com/environmental-emissions/illinois-epa-approves-permit-for-380-mw-expansion-of-invenergy-nelson-plant) — power-eng.com · tier other
- [7F Heavy Duty Gas Turbine | 7F.04/7F.05](https://www.gevernova.com/gas-power/products/gas-turbines/7f) — gevernova.com · tier other
- [Illinois EPA Approves Permit for 380-MW Expansion of Invenergy Nelson Plant](https://www.power-eng.com/environmental-emissions/illinois-epa-approves-permit-for-380-mw-expansion-of-invenergy-nelson-plant) — power-eng.com · tier other
- [CONFIDENTIAL COMMERCIAL INFORMATION HAS BEEN REDACTED Exhibit A Date: January 29, 2025 Requested by: Commission / DPS Staff Subject: Canisteo](https://documents.dps.ny.gov/public/Common/ViewDoc.aspx?DocRefId=%7B70C1B794-0000-CB16-A8C8-8D41F313588F%7D) — documents.dps.ny.gov · tier regulatory
- [ArcLight to Acquire InfraBridge’s 50% Stake in 5.4 GW Power Portfolio - InfraBridge](https://www.infrabridge.com/news/2026-03-12-arclight-to-acquire-infrabridge-50-stake-in-54-gw-power-portfolio) — infrabridge.com · tier other
- [Source](https://www.monitoringanalytics.com/filings/2026/IMM_Comments_Docket_No_EC26-67_20260320.pdf) — monitoringanalytics.com · tier other
- [Invenergy Thermal Operating I LLC Senior Secured | S&P Global Ratings](https://www.spglobal.com/ratings/jp/regulatory/article/-/view/type/HTML/id/3362135) — spglobal.com · tier other
- [Invenergy | Nelson Energy Center](https://www.invenergy.com/projects/case-studies/nelson-energy-center) — invenergy.com · tier other
- [Invenergy Thermal Operating I LLC New Senior Secu | S&P Global Ratings](https://www.spglobal.com/ratings/en/regulatory/article/-/view/type/HTML/id/3027391) — spglobal.com · tier other

## Data quality

- The 2004 acquisition involved the partially completed original Nelson facility and its property, not a separately documented acquisition of the later 380-MW EIA plant 60387 expansion. The original Nelson project’s December 2013 construction and term-loan financing is not treated as financing for EIA plant 60387; the disclosed 2025 debt transaction is a portfolio-level refinancing that included Nelson Expansion but did not allocate proceeds to it. Commercial-operation dating is not fully uniform: EIA and plant records identify initial operation in April 2023, while a January 2025 New York filing lists May 20, 2023 and 397.8 MW for the expansion. The common supported year is 2023. ArcLight’s proposed purchase of InfraBridge’s stake was announced in March 2026, with financial terms undisclosed and closing expected in the second half of 2026; the evidence does not establish that the sale had closed by August 2, 2026.

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