# Colorado Bend II ERCOT Natural Gas Fired Combined Cycle · https://askthegrid.com/assets/facilities/colorado-bend-ii Colorado Bend II is a natural gas-fired power facility with 1,230.3 MW of EIA-reported nameplate capacity in Wharton County, Texas, registered as EIA Plant ID 60122. Constellation Energy Generation is the public owner or developer; Constellation Power, Inc is the registered plant entity or operator. Colorado Bend II is a large ERCOT combined-cycle facility whose air-cooled units use air rather than water for cooling, an important design feature for drought-prone Texas. Commercial operation began in June 2017. ## Key facts - Technology: Natural Gas Fired Combined Cycle - Power capacity: 1230.3 MW - Operating status: operating ## Grid and market context - ISO/RTO: ERCOT - Balancing authority: ERCOT - Substation: Bailey Substation - Point of interconnection: Bailey Substation - Transmission owner: CenterPoint Energy Houston Electric, LLC - Interconnection voltage: 345 kV ## Source-backed facts - Owner logo domain: constellationenergy.com — Colorado Bend II Generating Station | Constellation Energy Locations · confidence: medium - Official project url: https://www.constellationenergy.com/about/locations/colorado-bend-ii.html — Colorado Bend II Generating Station | Constellation Energy Locations · confidence: high - Owner name: Constellation Energy Generation — Colorado Bend II Generating Station | Constellation Energy Locations · confidence: medium - Description: Colorado Bend II is a natural-gas-fired combined-cycle generating station in Wharton County, Texas, at 4023 South State Highway 60. The plant began commercial operation in June 2017 and has three EIA-reported generators—CT7, CT8, and STG9—with a combined nameplate capacity of 1,230.3 MW. It is owned and operated within the Constellation fleet and participates in ERCOT. — Power plant profile: Colorado Bend Combined Cycle Power Plant II, US · confidence: medium - Description: Colorado Bend II is a natural-gas-fired combined-cycle generating station in Wharton County, Texas, at 4023 South State Highway 60. The plant began commercial operation in June 2017 and has three EIA-reported generators—CT7, CT8, and STG9—with a combined nameplate capacity of 1,230.3 MW. It is owned and operated within the Constellation fleet and participates in ERCOT. — Colorado Bend II Generating Station | Constellation Energy Locations · confidence: medium - Canonical name: Colorado Bend II — Colorado Bend II Generating Station | Constellation Energy Locations · confidence: high - Identifiers.2: {"value":"ERCOT","system":"ISO/RTO"} — Source · confidence: high - Identifiers.6: {"value":"CBECII","system":"ERCOT generator station code"} — Stand-Alone Generation Resources as of 09.01.25.pdf · confidence: high - Identifiers.7: {"value":"CBECII_CT7","system":"ERCOT market resource"} — Stand-Alone Generation Resources as of 09.01.25.pdf · confidence: high - Identifiers.8: {"value":"CBECII_CT8","system":"ERCOT market resource"} — Stand-Alone Generation Resources as of 09.01.25.pdf · confidence: high - Identifiers.9: {"value":"CBECII_STG9","system":"ERCOT market resource"} — Stand-Alone Generation Resources as of 09.01.25.pdf · confidence: high - Parties.0: {"relationship":"Owner","name":"Constellation Energy Generation","official_url":"https://www.constellationenergy.com"} — Power plant profile: Colorado Bend Combined Cycle Power Plant II, US · confidence: medium - Parties.4: {"relationship":"Original developer / project sponsor","name":"Exelon Generation","official_url":null} — Source · confidence: medium - Parties.5: {"relationship":"Engineering, procurement, and construction contractor","name":"Zachry","official_url":"https://zachrygroup.com"} — Power plant profile: Colorado Bend Combined Cycle Power Plant II, US · confidence: high - Parties.6: {"relationship":"Gas-turbine, steam-turbine, generator, boiler, and O&M supplier","name":"GE Vernova (identified in project records as GE Power)","official_url":"https://www.gevernova.com"} — Power plant profile: Colorado Bend Combined Cycle Power Plant II, US · confidence: medium - Parties.7: {"relationship":"Heat-recovery steam-generator supplier","name":"Alstom Power","official_url":"https://www.alstom.com"} — Source · confidence: medium - Parties.8: {"relationship":"Natural-gas supplier / pipeline","name":"Gulf South Pipeline Company LP","official_url":null} — Power plant profile: Colorado Bend Combined Cycle Power Plant II, US · confidence: medium - Commercial operation date: 2017-06 — Source · confidence: high - Construction scope: Colorado Bend II is a natural-gas combined-cycle facility comprising two GE 7HA.02 gas turbines rated at 360.9 MW each, one GE D600 steam turbine rated at 508.5 MW, and Alstom OCC Module Design heat-recovery steam generators. ERCOT identifies three installed thermal generator resources: CT7, CT8, and STG9, with nameplate capacities of 361 MW, 361 MW, and 509 MW, respectively. — Source · confidence: medium - Product url: https://www.gevernova.com/gas-power/products/gas-turbines/7ha — 7HA Gas Turbine | GE Vernova · confidence: medium - Kind: thermal — Source · confidence: high - Kind: thermal — Colorado Bend II Generating Station | Constellation Energy Locations · confidence: high - Manufacturer domain: gevernova.com — 7HA Gas Turbine | GE Vernova · confidence: medium - Description: Colorado Bend II is a 1,230.3 MW natural-gas-fired combined-cycle generating station in Wharton County, Texas, comprising three EIA-reported generators. The expansion was developed by Exelon Generation and constructed as a single-phase project, with Zachry providing EPC services and GE Power supplying the major turbine and steam-cycle equipment. The facility began commercial operations in June 2017 and is now owned and operated within the Constellation fleet. It participates in ERCOT and interconnects through CenterPoint Energy Houston Electric. — Colorado Bend II Generating Station | Constellation Energy Locations · confidence: medium - Description: Colorado Bend II is a 1,230.3 MW natural-gas-fired combined-cycle generating station in Wharton County, Texas, comprising three EIA-reported generators. The expansion was developed by Exelon Generation and constructed as a single-phase project, with Zachry providing EPC services and GE Power supplying the major turbine and steam-cycle equipment. The facility began commercial operations in June 2017 and is now owned and operated within the Constellation fleet. It participates in ERCOT and interconnects through CenterPoint Energy Houston Electric. — Power plant profile: Colorado Bend Combined Cycle Power Plant II, US · confidence: medium - Financing summary: On 2022-02-01, Constellation entered a $3.5 billion five-year revolving credit facility maturing 2027-02-01 at SOFR plus 1.275%; Colorado Bend II Power, LLC appears among the entities associated with the agreement. Constellation's filing describes this facility as corporate liquidity financing, replacing a $5.3 billion syndicated revolver, rather than project financing for Colorado Bend II. The same filing separately reported $131 million of aggregate project-finance commitments as of 2022-06-30 but did not allocate that amount to this plant or identify plant-specific lenders. A project profile reports a $1,532.257 million project cost, but no separate Colorado Bend II acquisition price, sale consideration, or dedicated construction-loan amount was disclosed. — Source · confidence: medium - Financing summary: On 2022-02-01, Constellation entered a $3.5 billion five-year revolving credit facility maturing 2027-02-01 at SOFR plus 1.275%; Colorado Bend II Power, LLC appears among the entities associated with the agreement. Constellation's filing describes this facility as corporate liquidity financing, replacing a $5.3 billion syndicated revolver, rather than project financing for Colorado Bend II. The same filing separately reported $131 million of aggregate project-finance commitments as of 2022-06-30 but did not allocate that amount to this plant or identify plant-specific lenders. A project profile reports a $1,532.257 million project cost, but no separate Colorado Bend II acquisition price, sale consideration, or dedicated construction-loan amount was disclosed. — Colorado Bend Combined Cycle Power Plant II, US · confidence: medium - Commercial parties.0: {"relationship":"Owner","name":"Constellation Energy Generation","detail":"Current owner of Colorado Bend II within the Constellation generation fleet.","official_url":"https://www.constellationenergy.com"} — Exelon Generation breaks ground on new 1,000-MW natural gas-fired unit at Colorado Bend Generating Station · confidence: medium - Commercial parties.0: {"relationship":"Owner","name":"Constellation Energy Generation","detail":"Current owner of Colorado Bend II within the Constellation generation fleet.","official_url":"https://www.constellationenergy.com"} — Colorado Bend II Generating Station | Constellation Energy Locations · confidence: medium - Commercial parties.3: {"relationship":"Project company / interconnection counterparty","name":"Colorado Bend II Power, LLC","detail":"Project-company entity identified as the owner in Texas construction records and as the counterparty to the CenterPoint interconnection agreement.","official_url":null} — Source · confidence: medium - Commercial parties.4: {"relationship":"Interconnecting transmission and distribution utility","name":"CenterPoint Energy Houston Electric, LLC","detail":"Interconnection and transmission/distribution utility for the Wharton County facility.","official_url":"https://www.centerpointenergy.com"} — Power plant profile: Colorado Bend Combined Cycle Power Plant II, US · confidence: medium - Commercial parties.4: {"relationship":"Interconnecting transmission and distribution utility","name":"CenterPoint Energy Houston Electric, LLC","detail":"Interconnection and transmission/distribution utility for the Wharton County facility.","official_url":"https://www.centerpointenergy.com"} — Colorado Bend Generating Station Expansion, Wharton County, Texas · confidence: medium - Commercial parties.4: {"relationship":"Interconnecting transmission and distribution utility","name":"CenterPoint Energy Houston Electric, LLC","detail":"Interconnection and transmission/distribution utility for the Wharton County facility.","official_url":"https://www.centerpointenergy.com"} — Source · confidence: medium - Commercial parties.5: {"relationship":"Engineering, procurement and construction contractor","name":"Zachry Group","detail":"Selected to provide engineering, procurement and construction services for the gas-fired project; Zachry Engineering was also identified in Texas construction records.","official_url":"https://zachrygroup.com"} — Power plant profile: Colorado Bend Combined Cycle Power Plant II, US · confidence: medium - Commercial parties.5: {"relationship":"Engineering, procurement and construction contractor","name":"Zachry Group","detail":"Selected to provide engineering, procurement and construction services for the gas-fired project; Zachry Engineering was also identified in Texas construction records.","official_url":"https://zachrygroup.com"} — Colorado Bend Generating Station Expansion, Wharton County, Texas · confidence: medium - Commercial parties.6: {"relationship":"Gas-turbine, steam-turbine and balance-of-plant equipment supplier","name":"GE Vernova (identified in project records as GE Power)","detail":"Supplied two 7HA.02 gas turbines, a D600 steam turbine, generators, and steam-cycle equipment for the project.","official_url":"https://www.gevernova.com"} — Colorado Bend Generating Station Expansion, Wharton County, Texas · confidence: medium - Commercial parties.6: {"relationship":"Gas-turbine, steam-turbine and balance-of-plant equipment supplier","name":"GE Vernova (identified in project records as GE Power)","detail":"Supplied two 7HA.02 gas turbines, a D600 steam turbine, generators, and steam-cycle equipment for the project.","official_url":"https://www.gevernova.com"} — Power plant profile: Colorado Bend Combined Cycle Power Plant II, US · confidence: medium - Commercial parties.7: {"relationship":"Heat-recovery steam-generator supplier","name":"Alstom Power","detail":"Supplied the two heat-recovery steam generators for the new combined-cycle plant.","official_url":"https://www.alstom.com"} — Power plant profile: Colorado Bend Combined Cycle Power Plant II, US · confidence: medium - Commercial parties.7: {"relationship":"Heat-recovery steam-generator supplier","name":"Alstom Power","detail":"Supplied the two heat-recovery steam generators for the new combined-cycle plant.","official_url":"https://www.alstom.com"} — Colorado Bend Generating Station Expansion, Wharton County, Texas · confidence: medium - Commercial parties.8: {"relationship":"Natural-gas pipeline / supplier","name":"Gulf South Pipeline Company LP","detail":"Identified in project records as the natural-gas pipeline or fuel supplier.","official_url":null} — Colorado Bend Generating Station Expansion, Wharton County, Texas · confidence: medium - Commercial parties.8: {"relationship":"Natural-gas pipeline / supplier","name":"Gulf South Pipeline Company LP","detail":"Identified in project records as the natural-gas pipeline or fuel supplier.","official_url":null} — Power plant profile: Colorado Bend Combined Cycle Power Plant II, US · confidence: medium - Commercial parties.9: {"relationship":"Owner's engineer","name":"Black & Veatch","detail":"Identified as the owner's engineer for the Colorado Bend expansion project.","official_url":"https://www.bv.com"} — Colorado Bend II Generating Station | Constellation Energy Locations · confidence: medium - Commercial parties.9: {"relationship":"Owner's engineer","name":"Black & Veatch","detail":"Identified as the owner's engineer for the Colorado Bend expansion project.","official_url":"https://www.bv.com"} — Colorado Bend Generating Station Expansion, Wharton County, Texas · confidence: medium - Quality notes.0: The 2022 ownership change was a tax-free separation and distribution of Constellation from Exelon, not a disclosed arm's-length sale of Colorado Bend II; no separate purchase price or seller-paid sale consideration was identified. — Colorado Bend II Generating Station | Constellation Energy Locations · confidence: high - Quality notes.1: The 2010 Exelon/Constellation purchase cited in public filings concerned the existing 550 MW Colorado Bend Energy Center, not the Colorado Bend II expansion, and is therefore excluded from this plant's acquisition history. — Exelon Corporation · confidence: medium - Quality notes.3: The reported $1,532.257 million project cost is treated as a development-cost figure, not as financing proceeds or sale consideration. The disclosed $3.5 billion facility was a corporate revolving credit facility rather than Colorado Bend II-specific project debt. — Colorado Bend Combined Cycle Power Plant II, US · confidence: medium - Quality notes.3: The reported $1,532.257 million project cost is treated as a development-cost figure, not as financing proceeds or sale consideration. The disclosed $3.5 billion facility was a corporate revolving credit facility rather than Colorado Bend II-specific project debt. — Colorado Bend II Generating Station | Constellation Energy Locations · confidence: medium - Timeline.0: {"event":"Construction groundbreaking","date":"2015-07-09","detail":"Exelon Generation broke ground on a new approximately 1,000 MW low-carbon combined-cycle gas turbine at the existing Colorado Bend generating station; commercial operation was expected in 2017."} — Exelon Generation breaks ground on new 1,000-MW natural gas-fired unit at Colorado Bend Generating Station · confidence: high - Timeline.2: {"event":"Project commissioning and commercial operation","date":"2017-06","detail":"The Colorado Bend II project was commissioned and began commercial operations in June 2017."} — Colorado Bend II Generating Station | Constellation Energy Locations · confidence: high - Timeline.4: {"event":"Corporate financing","date":"2022-02-01","detail":"Constellation entered a new $3.5 billion five-year revolving credit facility. The facility was corporate financing and was not identified as dedicated Colorado Bend II project debt."} — Source · confidence: high - Acquisition date: 2022-02-01 — Source · confidence: high - Substation: Bailey Substation — * ESQUIRE · confidence: medium - Interconnection voltage kv: 345 — * ESQUIRE · confidence: medium ## Timeline - 2015-07-09 — Construction groundbreaking Exelon Generation broke ground on a new approximately 1,000 MW low-carbon combined-cycle gas turbine at the existing Colorado Bend generating station; commercial operation was expected in 2017. Source: Exelon Generation breaks ground on new 1,000-MW natural gas-fired unit at Colorado Bend Generating Station (https://www.power-eng.com/environmental-emissions/exelon-generation-breaks-ground-on-new-1-000-mw-natural-gas-fired-unit-at-colorado-bend-generating-station/) - 2017-06 — Project commissioning and commercial operation The Colorado Bend II project was commissioned and began commercial operations in June 2017. Source: Colorado Bend II Generating Station | Constellation Energy Locations (https://www.constellationenergy.com/about/locations/colorado-bend-ii.html) - 2022-02-01 — Ownership transition through corporate separation Exelon completed the legal and structural separation and distribution of Constellation. Colorado Bend II Power, LLC was included among the Constellation entities, making Constellation the successor owner/operator; this was a corporate separation rather than a disclosed cash sale. Source: Source (https://investors.exeloncorp.com/static-files/96e979a6-d649-4a2a-8e43-95bfd34c67b6) ## Sources - [Colorado Bend II Generating Station | Constellation Energy Locations](https://www.constellationenergy.com/about/locations/colorado-bend-ii.html) — constellationenergy.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 - [Interchange - Documents](https://interchange.puc.texas.gov/search/documents/?controlNumber=35077&itemNumber=630) — interchange.puc.texas.gov · tier regulatory - [Power plant profile: Colorado Bend Combined Cycle Power Plant II, US](https://www.power-technology.com/data-insights/power-plant-profile-colorado-bend-combined-cycle-power-plant-ii-us/) — power-technology.com · tier other - [Source](https://zachrygroup.com/press-releases/Exelon_Generation_To_Build_Two_New_Natural_Gas_Units_In_Texas.html) — zachrygroup.com · tier other - [Source](https://constellationenergy.com/about/locations/colorado-bend-ii.html) — constellationenergy.com · tier other - [Alstom to provide high efficiency Heat Recovery Steam Generators for two combined-cycle gas power plants in Texas | Alstom](https://www.alstom.com/press-releases-news/2014/11/alstom-to-provide-high-efficiency-heat-recovery-steam-generators-for-two-combined-cycle-gas-power-plants-in-texas) — alstom.com · tier other - [7HA Gas Turbine | GE Vernova](https://www.gevernova.com/gas-power/products/gas-turbines/7ha) — gevernova.com · tier other - [Exelon Corporation](https://www.sec.gov/Archives/edgar/data/9466/000104746912001863/R26.htm) — sec.gov · tier regulatory - [Colorado Bend Combined Cycle Power Plant II, US](https://www.power-technology.com/marketdata/colorado-bend-combined-cycle-power-plant-ii-us/) — power-technology.com · tier other - [Source](https://investors.exeloncorp.com/static-files/96e979a6-d649-4a2a-8e43-95bfd34c67b6) — investors.exeloncorp.com · tier other - [Source](https://investors.constellationenergy.com/static-files/511deeb6-33b8-4d05-a75f-0a941b93c32f) — investors.constellationenergy.com · tier other - [Exelon Generation breaks ground on new 1,000-MW natural gas-fired unit at Colorado Bend Generating Station](https://www.power-eng.com/environmental-emissions/exelon-generation-breaks-ground-on-new-1-000-mw-natural-gas-fired-unit-at-colorado-bend-generating-station/) — power-eng.com · tier other - [Colorado Bend Generating Station Expansion, Wharton County, Texas](https://www.power-technology.com/projects/colorado-bend-generating-station-expansion-wharton-county-texas/) — power-technology.com · tier other - [Source](https://renewableenergyworld.com/power-grid/gas-fired-power-plants-make-progress-in-fall-2016) — renewableenergyworld.com · tier other - [Exelon puts Texas plants totaling 3,500 MW into bankruptcy | American Public Power Association](https://www.publicpower.org/periodical/article/exelon-puts-texas-plants-totaling-3500-mw-bankruptcy) — publicpower.org · tier other - [Source](https://constellationenergy.gcs-web.com/static-files/fc29b4c4-f61f-4eb9-8e27-4160a898a7a6) — constellationenergy.gcs-web.com · tier other - [Source](https://www.sec.gov/Archives/edgar/data/1868275/000110465922010603/tm224960d4_ex2-1.htm) — sec.gov · tier regulatory - [FORM 10-K](https://www.sec.gov/Archives/edgar/data/1868275/000155278126000142/e26100_ceg-ars.pdf) — sec.gov · tier regulatory - [* ESQUIRE](https://interchange.puc.texas.gov/Documents/59199_41_1622749.PDF) — interchange.puc.texas.gov · tier regulatory - [Source](https://www.ercot.com/files/docs/2026/07/02/MORA_September2026.pdf) — ercot.com · tier regulatory ## Data quality - The 2022 ownership change was a tax-free separation and distribution of Constellation from Exelon, not a disclosed arm's-length sale of Colorado Bend II; no separate purchase price or seller-paid sale consideration was identified. The 2010 Exelon/Constellation purchase cited in public filings concerned the existing 550 MW Colorado Bend Energy Center, not the Colorado Bend II expansion, and is therefore excluded from this plant's acquisition history. Reported capacity varies by source and likely reflects different gross, net, or reporting bases: the EIA-linked plant record gives 1,230.3 MW, the owner page gives 1,143 MW, and a project profile gives 1,090 MW. The EIA plant value is used for the directory identity. The reported $1,532.257 million project cost is treated as a development-cost figure, not as financing proceeds or sale consideration. The disclosed $3.5 billion facility was a corporate revolving credit facility rather than Colorado Bend II-specific project debt. A 2014 Exelon credit agreement referencing Colorado Bend I's 550 MW facility was not attributed to Colorado Bend II. No plant-specific retirement, repowering, or post-commissioning uprate was identified in the cited operating records. --- Canonical page: https://askthegrid.com/assets/facilities/colorado-bend-ii Source: Ask the Grid — https://askthegrid.com/