Cedar Bayou 4
Cogentrix and NRG · Chambers County · ERCOT
Cedar Bayou 4 is a three-generator natural-gas combined-cycle facility near Baytown, Texas. EIA's May 2026 inventory reports 535.5 MW nameplate, 504 MW net summer, and 532 MW net winter capability; all three generators are dated June 2009. Cogentrix owns 50% and provides asset management, while NRG owns the remaining 50% and remains plant operator. Cogentrix reports a separate 550 MW company rating.
Overview
Key fields
- Net summer capacity
- 504 MW
EIA May 2026
- Nameplate capacity
- 535.5 MW
EIA May 2026
- Net winter capacity
- 532 MW
EIA May 2026
- Company rating
- 550 MW
Cogentrix
- Current settlement point
- CBY4_CC1
ERCOT public mapping
- Registry anchor
- Plant 56806
NRG Cedar Bayou Development Company LLC
Resource stack
- 2 resources
CBY4_CC1_2 · CBY4_CC1_4
Profile
- Grid role
- Jointly owned dispatchable combined-cycle generation in ERCOT.
- Operating configuration
- Two combustion-turbine generator records and one steam-turbine generator record, each 178.5 MW nameplate.
- Capacity scope
- EIA reports 535.5 MW nameplate, 504 MW net summer, and 532 MW net winter capability; Cogentrix separately reports 550 MW.
- Ownership and operation
- Cogentrix owns 50% and manages the asset; NRG owns 50% and remains operator.
Structured profile
- Net summer capacity
- 504 MW
EIA May 2026
- Nameplate capacity
- 535.5 MW
EIA May 2026
- Net winter capacity
- 532 MW
EIA May 2026
- Ownership
- Cogentrix 50% · NRG 50%
Cogentrix
- Operator
- NRG
Cogentrix
Units and generators
Operating generator records and technology attributes reported through EIA-860.
| Generator | Capacity | Technology | Operation | Status |
|---|---|---|---|---|
| 4 | 178.5 MW 178 MW summer | Natural Gas Fired Combined Cycle Natural Gas · CA | Jun 2009 Retirement: Dec 2039 | Operating |
| 41 | 178.5 MW 163 MW summer | Natural Gas Fired Combined Cycle Natural Gas · CT | Jun 2009 Retirement: Dec 2039 | Operating |
| 42 | 178.5 MW 163 MW summer | Natural Gas Fired Combined Cycle Natural Gas · CT | Jun 2009 Retirement: Dec 2039 | Operating |
Performance
Monthly EIA generation history and recent market-resource behavior where linked telemetry is available.
Peer context
- Technology capacity
- 535.5 MW
- National rank
- #299
- TX rank
- #45
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 · 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
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Parties and identifiers
| Relationship | Entity | Basis |
|---|---|---|
| 50% owner and asset manager | Cogentrix Odyssey acquisition record | |
| Market resources | CBY4_CC1_2, CBY4_CC1_4 | Linked ERCOT resources. |
| Grid selection | plant:plant-56806 | Canonical asset page /ercot/assets/plant/cedar-bayou-4. |
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
- Combined-cycle facility entered serviceEIA May 202...
EIA reports June 2009 for all three generators.
- Latest disclosed generation interval
ERCOT SCED disclosure is delayed, so plant performance windows end at the latest disclosed interval.
- Planned generator retirementEIA-860
EIA-860 lists a planned retirement for generator 4, generator 41, generator 42.
Sources
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