Cedar Bayou
NRG Texas Power LLC · Chambers County · ERCOT
Cedar Bayou is a two-unit natural-gas steam plant in Chambers County, Texas, registered as EIA Plant ID 3460. EIA reports 1,530 MW of nameplate capacity and 1,495 MW of net summer and net winter capability. ERCOT maps the two operating units to resources and settlement points CBY_CBY_G1 and CBY_CBY_G2, with resource in-service dates of December 11, 1970 and March 15, 1972. NRG Energy owns the plant through NRG Texas Power LLC. Cedar Bayou 4 and the under-construction Cedar Bayou 5 share the broader site but are separate plants or projects.
Overview
Key fields
- Net summer capability
- 1,495 MW
EIA operating capability.
- Nameplate capacity
- 1,530 MW
Two EIA steam generators.
- Technology
- Natural-gas steam
Two conventional steam units.
- Registry anchor
- Plant 3460
NRG Texas Power LLC · Chambers County · ERCOT
- Resource in-service
- 1970 / 1972
CBY_CBY_G1 / CBY_CBY_G2.
- Resource stack
- 2 resources
CBY_CBY_G1 · CBY_CBY_G2
Profile
- ERCOT configuration
- Two operating steam resources, CBY_CBY_G1 and CBY_CBY_G2, in the Houston zone.
- Current ownership
- NRG Energy reports 100% ownership; NRG Texas Power LLC is the EIA registered operator.
- Site boundaries
- Cedar Bayou 4 and Cedar Bayou 5 occupy the broader generation site but are not part of EIA Plant 3460.
Structured profile
- Net summer / winter
- 1,495 / 1,495 MW
EIA Form 860
- Owner
- NRG Energy
100% reported ownership
- Registered operator
- NRG Texas Power LLC
EIA Plant 3460
- TCEQ regulated entity
- RN100825371
Cedar Bayou site complex
- Coordinate parcel
- 39423
167.699 acres · NRG Texas LP
Units and generators
Operating generator records and technology attributes reported through EIA-860.
| Generator | Capacity | Technology | Operation | Status |
|---|---|---|---|---|
| 1 | 765 MW 746 MW summer | Natural Gas Steam Turbine Natural Gas · ST | Dec 1970 | Operating |
| 2 | 765 MW 749 MW summer | Natural Gas Steam Turbine Natural Gas · ST | Mar 1972 | Operating |
Performance
Monthly EIA generation history and recent market-resource behavior where linked telemetry is available.
Peer context
- Technology capacity
- 1,530 MW
- National rank
- #11
- TX rank
- #2
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 |
|---|---|---|
| Owner / operator | Owner / operator for Cedar Bayou | |
| Market resources | CBY_CBY_G1, CBY_CBY_G2 | Linked ERCOT resources. |
| Grid selection | plant:plant-3460 | Canonical asset page /ercot/assets/plant/cedar-bayou. |
Reporting portfolio
| Largest reported plants | Capacity | State |
|---|---|---|
| W A Parish | 4,008.4 MW | TX |
| Limestone | 1,849.8 MW | TX |
| Cedar BayouCurrent | 1,530 MW | TX |
| T H Wharton | 1,189.9 MW | TX |
| Greens Bayou | 432 MW | TX |
| San Jacinto Steam Electric Station | 176.4 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.
- Generator enters operationEIA-860
EIA-860 lists generator 2 with this operating date.
- Adjacent Cedar Bayou 5 registered as a PGCPUCT Cedar ...
PUCT approved registration 20917 for the separate proposed 721 MW facility.
- Adjacent Cedar Bayou 5 closed TEF financingNRG Cedar B...
The separate project entered into a $561.9 million, 3% Texas Energy Fund credit agreement.
- Latest disclosed generation interval
ERCOT SCED disclosure is delayed, so plant performance windows end at the latest disclosed interval.
Sources
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