Cedar Bayou 4
Natural gas power plant in Chambers County, Texas. 535.5 MW of nameplate capacity across 3 generators, operated by NRG Cedar Bayou Development Company LLC.
Also known as EIA plant 56806
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Key facts
- Capacity
- 535.5 MWNameplate
- Generators
- 3 operatingEIA-860M, August 2026
- Operating since
- June 2009First generator online
- Operator
- NRG Cedar Bayou Development Company LLCEIA operator ID 56020
- Grid
- ERCOTBalancing authority ERCO
- Price nodes
- None linkedNo verified ISO node
- Location
- Chambers County, TX29.7516, −94.9231
- EIA plant ID
- 56806EIA plant page
Data as of EIA-860M August 2026 (published 2026-09-24). Capacity is nameplate, not live output.
How much power Cedar Bayou 4 produces
Free · EIA-923Net generation, 2025
2.33 TWh
2,325,808 MWh, final
Capacity factor, 2025
49.6%
2024: 48.2%
January to July 2026
Not reported
Provisional. 0 of 7 months reported
Range, 2015 to 2025
0.6–2.5
TWh a year. Low 2019, high 2022
| Year | Net generation, MWh | Capacity factor | Months reported |
|---|---|---|---|
| 2000 | Not reported | Not reported | 0 of 12 |
| 2001 | Not reported | Not reported | 0 of 12 |
| 2002 | Not reported | Not reported | 0 of 12 |
| 2003 | Not reported | Not reported | 0 of 12 |
| 2004 | Not reported | Not reported | 0 of 12 |
| 2005 | Not reported | Not reported | 0 of 12 |
| 2006 | Not reported | Not reported | 0 of 12 |
| 2007 | Not reported | Not reported | 0 of 12 |
| 2008 | Not reported | Not reported | 0 of 12 |
| 2009 | 1,485,542 | Not reported | 7 of 12 |
| 2010 | 2,191,094 | Not reported | 12 of 12 |
| 2011 | 86,003 | Not reported | 4 of 12 |
| 2012 | 1,730,714 | 36.8% | 12 of 12 |
| 2013 | 1,037,454 | 22.1% | 12 of 12 |
| 2014 | 1,048,105 | 22.3% | 12 of 12 |
| 2015 | 1,300,541 | 27.7% | 12 of 12 |
| 2016 | 1,249,776 | 26.6% | 12 of 12 |
| 2017 | 1,430,973 | 30.5% | 12 of 12 |
| 2018 | 623,340 | 13.3% | 12 of 12 |
| 2019 | 618,632 | 13.2% | 12 of 12 |
| 2020 | 1,741,098 | 37.0% | 12 of 12 |
| 2021 | 2,200,745 | 46.9% | 12 of 12 |
| 2022 | 2,453,095 | 52.3% | 12 of 12 |
| 2023 | 1,904,676 | 40.6% | 12 of 12 |
| 2024 | 2,266,071 | 48.2% | 12 of 12 |
| 2025 | 2,325,808 | 49.6% | 12 of 12 |
| 2026 (provisional, partial year) | Not reported | Not reported | 0 of 7 |
* 2026 covers January to July and is provisional. Capacity factor is net generation divided by nameplate capacity times the hours of each reported month.
Power prices and basis
Free accountNo verified ISO price node is linked to this plant, or its price history could not load.
Emissions
Free · EPA CAMPDCO₂, 2025
908,905
US short tons. 2024: 879,219
SO₂, 2025
5
US short tons
NOx, 2025
82
US short tons
CO₂ per MWh, calculated
0.39 t
About 782 lb per MWh
2 of 2 EPA units reported CO₂ in 2025 (CBY41, CBY42), matched to EIA plant 56806 through the EPA–EIA crosswalk. The per-MWh rate is EPA CO₂ divided by EIA-923 net generation. The two reporting boundaries can differ.
Water use
Free · EIA-923 cooling, USGSWithdrawal, 2024
47,479
million gallons
Consumption, 2024
1,424
million gallons
Source
Upper Galveston Bay
Surface, Brackish. Once-through with cooling pond
Watershed stress
Very low/none · 0.187
USGS SUI, HUC12 Cedar Point Lateral-Cedar Bayou
12 of 12 cooling months report withdrawal. Saline, brackish or ocean intake; not tested. Cooling-pond plants report water circulated through the pond as withdrawal, so withdrawal is far above consumption. Blank volumes are unreported, not zero.
Generators
Free · EIA-860M| Generator | Technology | Nameplate MW | Online since |
|---|---|---|---|
| 4 | Natural Gas Fired Combined Cycle | 178.5 | June 2009 |
| 41 | Natural Gas Fired Combined Cycle | 178.5 | June 2009 |
| 42 | Natural Gas Fired Combined Cycle | 178.5 | June 2009 |
Ownership and offtake
ProOwnership and offtake are part of Pro
Owners and their shares, parent companies, and power purchase agreements with their buyers. EIA-860M lists NRG Cedar Bayou Development Company LLC as the operator, which is not always the owner.
Modeled data
ProPro adds modeled values for this plant. Everything above stays free.
Generation potential vs reported
Monthly potential at seasonal net capability, next to EIA-923 output. Shows how much of the plant's capability was used.
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Questions about Cedar Bayou 4
How much power does Cedar Bayou 4 produce?
Cedar Bayou 4 reported 2,325,808 MWh (2.33 TWh) of net generation in 2025, a 49.6% capacity factor on 535.5 MW of nameplate capacity.
Where is Cedar Bayou 4?
Cedar Bayou 4 is in Chambers County, Texas, at 29.7516, −94.9231. It is in the Electric Reliability Council of Texas, Inc. balancing area (ERCO).
Who operates Cedar Bayou 4?
EIA-860M for August 2026 lists NRG Cedar Bayou Development Company LLC as the operator (EIA operator ID 56020). The operator is not always the owner.
When did Cedar Bayou 4 start operating?
Its first generator began operating in June 2009, according to EIA-860M.
Sources
- EIA-860 2025 (final) and EIA-860M August 2026: plant, generators, capacity, operator and location
- EIA-923 monthly net generation, 2000 to July 2026 (2026 provisional)
- EPA CAMPD annual emissions through the EPA–EIA crosswalk, 1995 to 2025
- EIA-923 cooling water 2024 and the USGS surface water supply and use index, Water years 2010-2020 (Oct 2009 to Sep 2020), mean of monthly values
Page updated 2026-10-04 from the InfraMap data build. Methodology · Data sources · EIA plant page