Graham
Luminant · Young County · ERCOT
Graham is a two-unit natural-gas steam-electric plant in Young County, Texas. EIA's May 2026 inventory reports 634.7 MW nameplate and 629 MW net summer and winter capability. Luminant states that Unit 1 entered commercial operation on December 19, 1960, and Unit 2 followed in 1969.
Overview
Key fields
- Net summer capacity
- 629 MW
EIA May 2026 · two generators
- Nameplate capacity
- 634.7 MW
EIA May 2026
- Net winter capacity
- 629 MW
EIA May 2026
- Settlement points
- 2
GRSES_UNIT1 · GRSES_UNIT2
- Registry anchor
- Plant 3490
Luminant Generation Company LLC
Resource stack
- 2 resources
GRSES_UNIT1 · GRSES_UNIT2
Profile
- Grid role
- Dispatchable two-unit steam generation in ERCOT.
- Operating configuration
- Unit 1 is 247.7 MW nameplate and Unit 2 is 387 MW nameplate.
- Market mapping
- ERCOT identifies GRSES_UNIT1 and GRSES_UNIT2 as the two Graham resources and current settlement points.
Structured profile
- Net summer capacity
- 629 MW
EIA May 2026
- Nameplate capacity
- 634.7 MW
EIA May 2026
- Net winter capacity
- 629 MW
EIA May 2026
- Operator
- Luminant Generation Company LLC
EIA May 2026
- Commercial operation
- Dec 19, 1960
Unit 1 · Luminant
Units and generators
Operating generator records and technology attributes reported through EIA-860.
| Generator | Capacity | Technology | Operation | Status |
|---|---|---|---|---|
| 1 | 247.7 MW 239 MW summer | Natural Gas Steam Turbine Natural Gas · ST | Dec 1960 | Operating |
| 2 | 387 MW 390 MW summer | Natural Gas Steam Turbine Natural Gas · ST | Jun 1969 | Operating |
Performance
Monthly EIA generation history and recent market-resource behavior where linked telemetry is available.
Peer context
- Technology capacity
- 634.7 MW
- National rank
- #45
- TX rank
- #12
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
2 ERCOT market resources · Gas steam
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 |
|---|---|---|
| Operator | Operator for Graham | |
| Market resources | GRSES_UNIT1, GRSES_UNIT2 | Linked ERCOT resources. |
| Grid selection | plant:plant-3490 | Canonical asset page /ercot/assets/plant/graham. |
Reporting portfolio
| Largest reported plants | Capacity | State |
|---|---|---|
| Comanche Peak | 2,430 MW | TX |
| Martin Lake | 2,379.6 MW | TX |
| Oak Grove (TX) | 1,795.4 MW | TX |
| Lake Hubbard | 927.5 MW | TX |
| Stryker Creek | 713.4 MW | TX |
| GrahamCurrent | 634.7 MW | TX |
| DeCordova Steam Electric Station | 626.7 MW | TX |
| Morgan Creek | 536.4 MW | TX |
Portfolio membership follows the latest EIA-860 reporting entity. It does not imply ultimate ownership.
View full reporting portfolioTimeline and sources
Project milestones and public references behind the asset profile.
Project timeline
- Generator enters operationEIA-860
EIA-860 lists generator 1 with this operating date.
- Unit 1 entered commercial operationLuminant Gr...
Luminant reports Unit 1 entered commercial operation on December 19, 1960.
- Unit 2 entered serviceEIA May 202...
EIA reports June 1969 for Unit 2; Luminant identifies 1969 as its operating year.
- Latest disclosed generation interval
ERCOT SCED disclosure is delayed, so plant performance windows end at the latest disclosed interval.
Sources
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