# Wise County Power LLC

ERCOT Natural Gas Fired Combined Cycle · https://askthegrid.com/assets/facilities/wise-county-power-llc

Wise County Power LLC is a natural gas-fired power facility with 821.7 MW of EIA-reported nameplate capacity in Wise County, Texas, registered as EIA Plant ID 55320. Wise County Power Company LLC owns and operates the plant, a subsidiary of Vistra Corp. Its grid role is dispatchable thermal combined-cycle generation resource in ERCOT; ERCOT classifies the three resources as operational thermal GAS-CC units.
WCPP_CT1; WCPP_CT2; WCPP_ST1 · 350 kV.

## Key facts

- Technology: Natural Gas Fired Combined Cycle
- Power capacity: 821.7 MW
- Operating status: operating

## Grid and market context

- ISO/RTO: ERCOT
- Balancing authority: ERCO (ERCOT)

## Source-backed facts

- Owner logo domain: vistracorp.com — texas · confidence: medium
- Official project url: https://www.tceq.texas.gov/downloads/permitting/wastewater/title-iv/tlap/wq0004897000-wisecountypowercompanyllc-wisecountypowercompanyllc-wise-tlap-adminpackage.pdf — Source · confidence: medium
- Description: Wise County Power LLC is an 821.7-MW natural gas-fired combined-cycle power plant in Poolville, Wise County, Texas. The facility is identified by EIA plant ID 55320 and began operating in July 2004. It is operated by Wise County Power Company, LLC and participates in the ERCOT market through the WCPP_CT1, WCPP_CT2, and WCPP_ST1 resources. — Source · confidence: medium
- Description: Wise County Power LLC is an 821.7-MW natural gas-fired combined-cycle power plant in Poolville, Wise County, Texas. The facility is identified by EIA plant ID 55320 and began operating in July 2004. It is operated by Wise County Power Company, LLC and participates in the ERCOT market through the WCPP_CT1, WCPP_CT2, and WCPP_ST1 resources. — Source · confidence: medium
- Identifiers.0: {"value":"55320","system":"EIA plant ID"} — MBR | Index · confidence: high
- Identifiers.3: {"value":"GT1","system":"EIA generator ID"} — MBR | Index · confidence: high
- Identifiers.4: {"value":"GT2","system":"EIA generator ID"} — MBR | Index · confidence: high
- Identifiers.6: {"value":"WCPP_CT1","system":"ERCOT market resource"} — Source · confidence: medium
- Identifiers.7: {"value":"WCPP_CT2","system":"ERCOT market resource"} — Source · confidence: medium
- Identifiers.8: {"value":"WCPP_ST1","system":"ERCOT market resource"} — Source · confidence: medium
- Identifiers.12: {"value":"RN102584844","system":"TCEQ regulated entity number"} — Source · confidence: high
- Identifiers.13: {"value":"WQ0004897000","system":"TCEQ permit number"} — Source · confidence: high
- Identifiers.15: {"value":"110015743383","system":"EPA FRS ID"} — EPA Facility Level GHG Emissions Data · confidence: medium
- Parties.0: {"relationship":"Owner and operator","name":"Wise County Power Company, LLC","official_url":null} — Source · confidence: high
- Product url: https://www.siemens-energy.com/global/en/home/products-services/product/sgt5-4000f.html — SGT5-4000F heavy duty gas turbine for commercial operation · confidence: medium
- Financing summary: No separately identified plant-level debt financing, lender group, or financing type was disclosed in the cited material. A 2001 source reported an approximately $350 million construction cost for the Wise County project. Separately, Atlas Power Finance, a Dynegy–ECP III joint venture, agreed to acquire the broader GSENA portfolio from an indirect ENGIE unit for $3.3 billion; the amount was portfolio consideration rather than Wise County-specific sale consideration. At closing, Dynegy acquired ECP's 35% joint-venture interest and paid ECP a revised $375 million post-closing amount. — Wise County power plant costs $350M · confidence: medium
- Financing summary: No separately identified plant-level debt financing, lender group, or financing type was disclosed in the cited material. A 2001 source reported an approximately $350 million construction cost for the Wise County project. Separately, Atlas Power Finance, a Dynegy–ECP III joint venture, agreed to acquire the broader GSENA portfolio from an indirect ENGIE unit for $3.3 billion; the amount was portfolio consideration rather than Wise County-specific sale consideration. At closing, Dynegy acquired ECP's 35% joint-venture interest and paid ECP a revised $375 million post-closing amount. — GDF Suez to sell some U.S. power plants for $3.3 billion · confidence: medium
- Financing summary: No separately identified plant-level debt financing, lender group, or financing type was disclosed in the cited material. A 2001 source reported an approximately $350 million construction cost for the Wise County project. Separately, Atlas Power Finance, a Dynegy–ECP III joint venture, agreed to acquire the broader GSENA portfolio from an indirect ENGIE unit for $3.3 billion; the amount was portfolio consideration rather than Wise County-specific sale consideration. At closing, Dynegy acquired ECP's 35% joint-venture interest and paid ECP a revised $375 million post-closing amount. — Dynegy completes $3.3B acquisition of Engie power plants | Utility Dive · confidence: medium
- Timeline: [{"event":"Preconstruction regulatory certification","date":"2001-02-21","detail":"Wise County Power Company, LLC was identified as owner and operator of a proposed 700-MW natural-gas combined-cycle plant in Wise County, with ERCOT listed as the purchasing entity and an anticipated January 2003 in-service date."},{"event":"Construction start","date":"2001-09","detail":"Construction began on the approximately $350 million Wise County merchant power project. Contemporary descriptions identified Wise County Power Co. L.P. as a wholly owned Tractebel subsidiary and described the project as approximately 720 MW."},{"event":"Commercial operation","date":"2004-07","detail":"The combined-cycle plant was commissioned in July 2004. The developed configuration comprised two Siemens gas turbines and one steam turbine, with Nooter/Eriksen supplying the heat-recovery steam boilers."},{"event":"SUEZ-era representation","date":"2009-01-07","detail":"SUEZ Energy Marketing North America represented Wise County Power Company LP in a Texas reliability filing, documenting the facility's SUEZ-era commercial affiliation."},{"event":"GSENA acquisition agreement announced","date":"2016-02-24","detail":"Atlas Power Finance, a unit of Atlas Power, the Dynegy–ECP III joint venture, entered into an agreement with International Power S.A., an indirect ENGIE unit, to acquire the GDF SUEZ Energy North America business for $3.3 billion. Wise County was among the Texas assets in the portfolio."},{"event":"GSENA portfolio acquisition closed","date":"2017-02-07","detail":"Dynegy acquired the GSENA thermal assets, including Wise County Power Company, LLC. Dynegy subsequently owned 100% of the acquired business after acquiring ECP's 35% interest in the joint venture."},{"event":"Vistra–Dynegy merger completed","date":"2018-04-09","detail":"Vistra Energy completed its merger with Dynegy in an all-stock transaction, making Wise County Power Company part of the Vistra corporate group."}] — Power plant profile: Wise County Combined Cycle Power Plant, US · confidence: medium
- Timeline: [{"event":"Preconstruction regulatory certification","date":"2001-02-21","detail":"Wise County Power Company, LLC was identified as owner and operator of a proposed 700-MW natural-gas combined-cycle plant in Wise County, with ERCOT listed as the purchasing entity and an anticipated January 2003 in-service date."},{"event":"Construction start","date":"2001-09","detail":"Construction began on the approximately $350 million Wise County merchant power project. Contemporary descriptions identified Wise County Power Co. L.P. as a wholly owned Tractebel subsidiary and described the project as approximately 720 MW."},{"event":"Commercial operation","date":"2004-07","detail":"The combined-cycle plant was commissioned in July 2004. The developed configuration comprised two Siemens gas turbines and one steam turbine, with Nooter/Eriksen supplying the heat-recovery steam boilers."},{"event":"SUEZ-era representation","date":"2009-01-07","detail":"SUEZ Energy Marketing North America represented Wise County Power Company LP in a Texas reliability filing, documenting the facility's SUEZ-era commercial affiliation."},{"event":"GSENA acquisition agreement announced","date":"2016-02-24","detail":"Atlas Power Finance, a unit of Atlas Power, the Dynegy–ECP III joint venture, entered into an agreement with International Power S.A., an indirect ENGIE unit, to acquire the GDF SUEZ Energy North America business for $3.3 billion. Wise County was among the Texas assets in the portfolio."},{"event":"GSENA portfolio acquisition closed","date":"2017-02-07","detail":"Dynegy acquired the GSENA thermal assets, including Wise County Power Company, LLC. Dynegy subsequently owned 100% of the acquired business after acquiring ECP's 35% interest in the joint venture."},{"event":"Vistra–Dynegy merger completed","date":"2018-04-09","detail":"Vistra Energy completed its merger with Dynegy in an all-stock transaction, making Wise County Power Company part of the Vistra corporate group."}] — January 7, 2009 · confidence: medium
- Timeline: [{"event":"Preconstruction regulatory certification","date":"2001-02-21","detail":"Wise County Power Company, LLC was identified as owner and operator of a proposed 700-MW natural-gas combined-cycle plant in Wise County, with ERCOT listed as the purchasing entity and an anticipated January 2003 in-service date."},{"event":"Construction start","date":"2001-09","detail":"Construction began on the approximately $350 million Wise County merchant power project. Contemporary descriptions identified Wise County Power Co. L.P. as a wholly owned Tractebel subsidiary and described the project as approximately 720 MW."},{"event":"Commercial operation","date":"2004-07","detail":"The combined-cycle plant was commissioned in July 2004. The developed configuration comprised two Siemens gas turbines and one steam turbine, with Nooter/Eriksen supplying the heat-recovery steam boilers."},{"event":"SUEZ-era representation","date":"2009-01-07","detail":"SUEZ Energy Marketing North America represented Wise County Power Company LP in a Texas reliability filing, documenting the facility's SUEZ-era commercial affiliation."},{"event":"GSENA acquisition agreement announced","date":"2016-02-24","detail":"Atlas Power Finance, a unit of Atlas Power, the Dynegy–ECP III joint venture, entered into an agreement with International Power S.A., an indirect ENGIE unit, to acquire the GDF SUEZ Energy North America business for $3.3 billion. Wise County was among the Texas assets in the portfolio."},{"event":"GSENA portfolio acquisition closed","date":"2017-02-07","detail":"Dynegy acquired the GSENA thermal assets, including Wise County Power Company, LLC. Dynegy subsequently owned 100% of the acquired business after acquiring ECP's 35% interest in the joint venture."},{"event":"Vistra–Dynegy merger completed","date":"2018-04-09","detail":"Vistra Energy completed its merger with Dynegy in an all-stock transaction, making Wise County Power Company part of the Vistra corporate group."}] — GDF Suez to sell some U.S. power plants for $3.3 billion · confidence: medium
- Timeline: [{"event":"Preconstruction regulatory certification","date":"2001-02-21","detail":"Wise County Power Company, LLC was identified as owner and operator of a proposed 700-MW natural-gas combined-cycle plant in Wise County, with ERCOT listed as the purchasing entity and an anticipated January 2003 in-service date."},{"event":"Construction start","date":"2001-09","detail":"Construction began on the approximately $350 million Wise County merchant power project. Contemporary descriptions identified Wise County Power Co. L.P. as a wholly owned Tractebel subsidiary and described the project as approximately 720 MW."},{"event":"Commercial operation","date":"2004-07","detail":"The combined-cycle plant was commissioned in July 2004. The developed configuration comprised two Siemens gas turbines and one steam turbine, with Nooter/Eriksen supplying the heat-recovery steam boilers."},{"event":"SUEZ-era representation","date":"2009-01-07","detail":"SUEZ Energy Marketing North America represented Wise County Power Company LP in a Texas reliability filing, documenting the facility's SUEZ-era commercial affiliation."},{"event":"GSENA acquisition agreement announced","date":"2016-02-24","detail":"Atlas Power Finance, a unit of Atlas Power, the Dynegy–ECP III joint venture, entered into an agreement with International Power S.A., an indirect ENGIE unit, to acquire the GDF SUEZ Energy North America business for $3.3 billion. Wise County was among the Texas assets in the portfolio."},{"event":"GSENA portfolio acquisition closed","date":"2017-02-07","detail":"Dynegy acquired the GSENA thermal assets, including Wise County Power Company, LLC. Dynegy subsequently owned 100% of the acquired business after acquiring ECP's 35% interest in the joint venture."},{"event":"Vistra–Dynegy merger completed","date":"2018-04-09","detail":"Vistra Energy completed its merger with Dynegy in an all-stock transaction, making Wise County Power Company part of the Vistra corporate group."}] — Vistra Energy Completes Merger with Dynegy · confidence: medium
- Timeline.1: {"event":"Construction start","date":"2001-09","detail":"Construction began on the approximately $350 million Wise County merchant power project. Contemporary descriptions identified Wise County Power Co. L.P. as a wholly owned Tractebel subsidiary and described the project as approximately 720 MW."} — Wise County power plant costs $350M · confidence: medium
- Timeline.2: {"event":"Commercial operation","date":"2004-07","detail":"The combined-cycle plant was commissioned in July 2004. The developed configuration comprised two Siemens gas turbines and one steam turbine, with Nooter/Eriksen supplying the heat-recovery steam boilers."} — Power plant profile: Wise County Combined Cycle Power Plant, US · confidence: medium
- Timeline.3: {"event":"SUEZ-era representation","date":"2009-01-07","detail":"SUEZ Energy Marketing North America represented Wise County Power Company LP in a Texas reliability filing, documenting the facility's SUEZ-era commercial affiliation."} — January 7, 2009 · confidence: medium
- Timeline.4: {"event":"GSENA acquisition agreement announced","date":"2016-02-24","detail":"Atlas Power Finance, a unit of Atlas Power, the Dynegy–ECP III joint venture, entered into an agreement with International Power S.A., an indirect ENGIE unit, to acquire the GDF SUEZ Energy North America business for $3.3 billion. Wise County was among the Texas assets in the portfolio."} — GDF Suez to sell some U.S. power plants for $3.3 billion · confidence: medium
- Timeline.5: {"event":"GSENA portfolio acquisition closed","date":"2017-02-07","detail":"Dynegy acquired the GSENA thermal assets, including Wise County Power Company, LLC. Dynegy subsequently owned 100% of the acquired business after acquiring ECP's 35% interest in the joint venture."} — Dynegy completes $3.3B acquisition of Engie power plants | Utility Dive · confidence: medium
- Timeline.6: {"event":"Vistra–Dynegy merger completed","date":"2018-04-09","detail":"Vistra Energy completed its merger with Dynegy in an all-stock transaction, making Wise County Power Company part of the Vistra corporate group."} — Vistra Energy Completes Merger with Dynegy · confidence: medium
- Commercial parties.2: {"relationship":"Original developer and sponsor","name":"Tractebel SA","detail":"Wise County Power Co. L.P. was described in 2001 as a wholly owned Tractebel subsidiary developing the plant.","official_url":"https://tractebel-engie.com/"} — Wise County power plant costs $350M · confidence: medium
- Commercial parties.3: {"relationship":"Former portfolio seller","name":"ENGIE, formerly GDF SUEZ","detail":"The GSENA thermal-assets transaction involved the purchase of stock of GDF SUEZ Energy North America from International Power S.A., an indirect ENGIE unit; Wise County Power was included among the acquired assets.","official_url":"https://www.engie.com/"} — GDF Suez to sell some U.S. power plants for $3.3 billion · confidence: medium
- Commercial parties.4: {"relationship":"Acquisition vehicle and initial co-investor","name":"Atlas Power Finance / Atlas Power","detail":"Atlas Power Finance, a unit of the Dynegy–ECP III Atlas Power joint venture, agreed to acquire the GSENA portfolio in 2016.","official_url":null} — GDF Suez to sell some U.S. power plants for $3.3 billion · confidence: medium
- Commercial parties.6: {"relationship":"Joint-venture investor","name":"Energy Capital Partners III","detail":"ECP III was Dynegy's 35% joint-venture partner in Atlas Power for the GSENA acquisition and was bought out by Dynegy at closing.","official_url":"https://www.ecpgp.com/"} — GDF Suez to sell some U.S. power plants for $3.3 billion · confidence: medium
- Commercial parties.6: {"relationship":"Joint-venture investor","name":"Energy Capital Partners III","detail":"ECP III was Dynegy's 35% joint-venture partner in Atlas Power for the GSENA acquisition and was bought out by Dynegy at closing.","official_url":"https://www.ecpgp.com/"} — Dynegy completes $3.3B acquisition of Engie power plants | Utility Dive · confidence: medium
- Commercial parties.8: {"relationship":"Heat-recovery steam-generator supplier","name":"Nooter/Eriksen","detail":"Nooter/Eriksen supplied the project's heat-recovery steam boilers, described in the construction account as HRSGs with duct burners.","official_url":"https://www.nooter-eriksen.com/"} — Power plant profile: Wise County Combined Cycle Power Plant, US · confidence: medium
- Status date: 2026-07 — Monthly Outlook for Resource Adequacy (MORA) · confidence: medium
- Resource type: Thermal — Source · confidence: high

## Timeline

- 2018-04-09 — Vistra–Dynegy merger completed
  Vistra Energy completed its merger with Dynegy in an all-stock transaction, making Wise County Power Company part of the Vistra corporate group.
  Source: Vistra Energy Completes Merger with Dynegy (https://investor.vistracorp.com/2018-04-09-Vistra-Energy-Completes-Merger-with-Dynegy)

## Sources

- [Source](https://www.sec.gov/Archives/edgar/data/92488/000119312518222829/d561329dex211.htm) — sec.gov · tier regulatory
- [texas](https://hub.vistracorp.com/documents/state-profiles/VST-in-TX.pdf?_t=1776261566) — hub.vistracorp.com · tier other
- [MBR | Index](https://mbrweb.ferc.gov/SearchlkpEIA/Index?page=286) — mbrweb.ferc.gov · tier regulatory
- [Source](https://www.ercot.com/files/docs/2025/09/02/Stand-Alone-Generation-Resources-as-of-09.01.25-v2.pdf) — ercot.com · tier regulatory
- [January 7, 2009](https://www.balch.com/files/upload/Wise%20County%20NOP.pdf) — balch.com · tier other
- [Source](https://www.tceq.texas.gov/downloads/permitting/wastewater/title-iv/tlap/wq0004897000-wisecountypowercompanyllc-wisecountypowercompanyllc-wise-tlap-adminpackage.pdf) — tceq.texas.gov · tier regulatory
- [EPA Facility Level GHG Emissions Data](https://ghgdata.epa.gov/flight/details/1000098/2023/E) — ghgdata.epa.gov · tier regulatory
- [Wise County power plant costs $350M - Dallas Business Journal](https://www.bizjournals.com/dallas/stories/2001/07/16/story2.html) — bizjournals.com · tier other
- [Source](https://industrialinfo.com/news/article/wise-county-power-set-to-begin-full-commercial-operation-of-700-megawatt-texas-power-plant--44859) — industrialinfo.com · tier other
- [Power plant profile: Wise County Combined Cycle Power Plant, US](https://www.power-technology.com/data-insights/power-plant-profile-wise-county-combined-cycle-power-plant-us/) — power-technology.com · tier other
- [SGT5-4000F heavy duty gas turbine for commercial operation](https://www.siemens-energy.com/global/en/home/products-services/product/sgt5-4000f.html) — siemens-energy.com · tier other
- [Heat Recovery Steam Generators - HRSGs - Nooter Eriksen](https://cicgroup.com/nooter-eriksen/heat-recovery-steam-generators-hrsgs/) — cicgroup.com · tier other
- [Vistra Energy Completes Merger with Dynegy](https://investor.vistracorp.com/2018-04-09-Vistra-Energy-Completes-Merger-with-Dynegy) — investor.vistracorp.com · tier other
- [GDF Suez to sell some U.S. power plants for $3.3 billion](https://www.renewableenergyworld.com/hydro-power/dams-civil-structures/gdf-suez-to-sell-some-u-s-power-plant-for-3-3-billion/) — renewableenergyworld.com · tier other
- [Dynegy completes $3.3B acquisition of Engie power plants | Utility Dive](https://www.utilitydive.com/news/dynegy-completes-33b-acquisition-of-engie-power-plants/435800/) — utilitydive.com · tier other
- [Wise County Combined Cycle Power Plant, US](https://www.power-technology.com/marketdata/wise-county-combined-cycle-power-plant-us/) — power-technology.com · tier other
- [ERCOT Nodal Protocols](https://www.ercot.com/files/docs/2022/10/11/July%2015,%202022%20Nodal%20Protocols.pdf) — ercot.com · tier regulatory
- [US Electric Power Transmission Lines in Wise County, Texas](https://felt.com/explore/us-electric-power-transmission-lines-wise-county-texas) — felt.com · tier other
- [Source](https://www.ercot.com/files/MarketNotice/2025/08/297735/Stand-Alone%20Generation%20Resources%20as%20of%2009.01.25.pdf) — ercot.com · tier regulatory
- [Source](https://www.ercot.com/files/docs/2026/04/02/MORA_June2026.pdf) — ercot.com · tier regulatory
- [Source](https://www.ercot.com/files/docs/2026/05/01/MORA_July2026.pdf) — ercot.com · tier regulatory
- [Completed](https://ftp.puc.texas.gov/public/puct-info/industry/electric/reports/genplant/gentable.xls) — ftp.puc.texas.gov · tier regulatory

## Data quality

- Current plant records report 821.7 MW and three generators; early development sources described the project as approximately 700–720 MW in a 2-on-1 configuration. The older figures are retained as historical development descriptions and are not treated as proof of a later expansion. The reported $350 million figure is a construction or project-cost estimate from 2001, not identified project-finance debt or plant-specific sale consideration. No explicit expansion, retirement, or repowering milestone for EIA plant 55320 was identified in the cited material; the capacity difference between early development estimates and current nameplate capacity is therefore not characterized as an expansion.

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