Tenaska Gateway Generating Station
Tenaska Gateway Partners · Rusk County · ERCOT / SPP
Tenaska Gateway Generating Station is a four-generator natural-gas combined-cycle facility near Long Branch in Rusk County, Texas. EIA's May 2026 inventory reports 939.6 MW nameplate, 826 MW net summer, and 921 MW net winter capability across three combustion turbines and one steam turbine, all with July 2001 operating months. Tenaska's current fleet page uses a separate 845 MW company rating and says the plant supplies both ERCOT and SPP.
Overview
Key fields
- Net summer capacity
- 826 MW
EIA May 2026 · four generators
- Nameplate capacity
- 939.6 MW
3 combustion turbines · 1 steam turbine
- Tenaska rating
- 845 MW
Current company fleet scope
- 2025 generation
- 4.56 TWh
EIA 923 · May 2025-April 2026
- Registry anchor
- Plant 55132
Tenaska Gateway Partners Ltd
Resource stack
- 5 resources
TGCCS_CC1_10 · TGCCS_CC1_11
Profile
- Grid role
- Dispatchable combined-cycle generation with dual-grid service to ERCOT and SPP.
- Operating configuration
- Three combustion turbines, three heat-recovery steam generators, and one steam turbine.
- Capacity scope
- EIA reports 939.6 MW nameplate and 826 MW summer capability; Tenaska uses an 845 MW company rating.
- Market mapping
- ERCOT's current public price list includes settlement point TGCCS_CC1.
Structured profile
- Owner / operator
- Tenaska Gateway Partners Ltd
Tenaska and EIA
- Operating generators
- 4
All report July 2001
- Market reach
- ERCOT / SPP
Tenaska official fleet description
- TCEQ entity
- RN101514214
Permit 40039 · PSDTX925M1
Units and generators
Operating generator records and technology attributes reported through EIA-860.
| Generator | Capacity | Technology | Operation | Status |
|---|---|---|---|---|
| GTG1 | 183.2 MW 157 MW summer | Natural Gas Fired Combined Cycle Natural Gas · CT | Jul 2001 | Operating |
| GTG2 | 183.2 MW 150 MW summer | Natural Gas Fired Combined Cycle Natural Gas · CT | Jul 2001 | Operating |
| GTG3 | 183.2 MW 138 MW summer | Natural Gas Fired Combined Cycle Natural Gas · CT | Jul 2001 | Operating |
| STG1 | 390 MW 381 MW summer | Natural Gas Fired Combined Cycle Natural Gas · CA | Jul 2001 | Operating |
Performance
Monthly EIA generation history and recent market-resource behavior where linked telemetry is available.
Peer context
- Technology capacity
- 939.6 MW
- National rank
- #104
- TX rank
- #16
Monthly generation
Download CSVMonthly generation is reported through EIA-923. Capacity factor uses the current EIA nameplate capacity and is shown only for complete calendar years.
ERCOT disclosed dispatch
5 ERCOT market resources · Combined-cycle gas
Generation
3 mo through May 22, 2026Capacity factor is average output vs. this plant's observed peak.
Output by hourlocal time · 90 days through May 22, 2026
Latest disclosed outputhourly · 2 weeks ending May 22, 2026
Generation from ERCOT's 60-Day SCED Disclosure (≈60-day lag), summed over this site's market resources.
Grid and market context
Deterministic links to ERCOT market resources, price records, outage disclosures, queue records, and nearby infrastructure. Candidate joins remain labeled until corroborated.
Market registration
ERCOT public disclosuresOperating context
ERCOT market recordsNearby substations
HIFLD infrastructure inventoryCommercial, land, and environmental record
Source-backed project transactions, agreements, land records, permits, and environmental disclosures. Portfolio and adjacent-project facts remain explicitly scoped.
Land and environmental record
Related parties and identifiers
Parties, market resources, and identifiers tied to this asset, with owner, operator, developer, EPC, compliance provider, and interconnecting entity roles kept separate.
Relationship graph
Drag organizations to explore the network. Select a node to pin its details and available page link.
Parties and identifiers
| Relationship | Entity | Basis |
|---|---|---|
| Owner (77.8%) | Owner (77.8%) for Tenaska Gateway Generating Station | |
| Co-owner (11.1%) | Co-owner (11.1%) for Tenaska Gateway Generating Station | |
| Market resources | TGCCS_CC1_10, TGCCS_CC1_11, TGCCS_CC1_12, TGCCS_CC1_2, TGCCS_CC1_5 | Linked ERCOT resources. |
| Grid selection | plant:plant-55132 | Canonical asset page /ercot/assets/plant/tenaska-gateway-generating-station. |
Reporting portfolio
Portfolio membership follows the latest EIA-860 reporting entity. It does not imply ultimate ownership.
Timeline and sources
Project milestones and public references behind the asset profile.
Project timeline
- Commercial OperationTenaska Gat...
Tenaska and EIA report that all four current generators entered service in July 2001.
- 25 years of operationTenaska Gat...
Tenaska marked the station's 25th operating anniversary at the plant.
- Latest disclosed generation interval
ERCOT SCED disclosure is delayed, so plant performance windows end at the latest disclosed interval.
Sources
Related assets
Similar plants ranked by technology, capacity, and distance.
Tenaska Frontier Generation Station
Natural Gas · 860 MW
Grimes County
Harrison County Power Project
Natural Gas · 514.4 MW
Harrison County
Freestone Energy Center
Natural Gas · 1,032 MW
Freestone County
Baytown Energy Center
Natural Gas · 852 MW
Chambers County