How big is Greens Bayou?

Greens Bayou has a reported capacity of 432 MW. Source: EIA Form 860.

What kind of plant is Greens Bayou?

Greens Bayou is a Natural Gas Fired Combustion Turbine facility in Harris County, TX, participating in the ERCOT market.

Where is Greens Bayou located?

Greens Bayou is in Harris County, TX, inside the ERCOT balancing area.

Who operates Greens Bayou?

Greens Bayou is operated by NRG Texas Power LLC according to the EIA generator inventory. Reporting membership does not by itself establish ultimate ownership.

How much electricity does Greens Bayou generate?

Greens Bayou reported 37.1 GWh over the twelve months to 2024-12. Figures are net generation as filed to EIA-923.

How does Greens Bayou compare to other plants?

By capacity, Greens Bayou ranks #64 of 257 operating plants of the same technology nationally. It ranks #17 of 32 in TX.

Greens Bayou — 432 MW gas plant, Harris County, TX

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Greens Bayou — 432 MW gas plant, Harris County, TX · Ask the Grid

Overview

Net summer capacity: 327 MW
EIA May 2026
Nameplate capacity: 432 MW
EIA May 2026
Net winter capacity: 396 MW
EIA May 2026
Current generators: 6
72 MW each
Current unit date: December 1976
EIA May 2026
Registry anchor: Plant 3464
NRG Texas Power LLC
Resource stack: 6 resources
GBY_GBYGT73 · GBY_GBYGT74

Profile

Grid role: Dispatchable simple-cycle peaking generation in ERCOT.
Current configuration: Six 72 MW nameplate natural-gas combustion turbines.
Capacity scope: 432 MW nameplate · 327 MW net summer · 396 MW net winter.
Site history: ASME's 1949 landmark applies to a historical installation, not the current six-unit operating date.

Structured profile

Net summer capacity: 327 MW
EIA May 2026
Current configuration: 6 × 72 MW combustion turbines
EIA May 2026
Operator: NRG Texas Power LLC
EIA May 2026
Historical landmark: 1949 outdoor generator installation
ASME

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Units and generators

Operating generator records and technology attributes reported through EIA-860.

Generator	Capacity	Technology	Operation	Status
5	446.4 MW 406 MW summer	Natural Gas Steam Turbine Natural Gas · ST	Jun 1973	Operating
73	72 MW 57 MW summer	Natural Gas Fired Combustion Turbine Natural Gas · GT	Dec 1976 Retirement: Dec 2035	Operating
74	72 MW 53 MW summer	Natural Gas Fired Combustion Turbine Natural Gas · GT	Dec 1976 Retirement: Dec 2035	Operating
81	72 MW

Performance

Monthly EIA generation history and recent market-resource behavior where linked telemetry is available.

Peer context

Technology capacity: 446.4 MW
National rank: #64
TX rank: #17

Monthly generation

Download CSV

Latest 12 months

37.1 GWh

Reported net generation

Latest report

Dec 2024

EIA-923 monthly filing

2024 capacity factor

1.0%

Using current reported nameplate capacity

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 disclosures

Settlement point

GBY_GT

high confidence spatial and capacity match

Market resources

6 resources

Commercial, 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

Coordinate Parcel Area

2025

76.6647 Acres

TxGIO parcel intersecting the mapped EIA plant coordinate; parcel 0410150010034; HARRIS APPRAISAL DISTRICT; tax year 2025

TxGIO land parcel intersecting

Coordinate Parcel Id

2025

0410150010034

TxGIO parcel intersecting the mapped EIA plant coordinate; parcel 0410150010034; HARRIS APPRAISAL DISTRICT; tax year 2025

TxGIO land parcel intersecting

Coordinate Parcel Market Value

2025

27100

TxGIO parcel intersecting the mapped EIA plant coordinate; parcel 0410150010034; HARRIS APPRAISAL DISTRICT; tax year 2025

TxGIO land parcel intersecting

Coordinate Parcel Owner

2025

NRG TEXAS POWER LLC

TxGIO parcel intersecting the mapped EIA plant coordinate; parcel 0410150010034; HARRIS APPRAISAL DISTRICT; tax year 2025

TxGIO land parcel intersecting

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.

AssetProject company

Parties and identifiers

OrganizationRoleBasis

NRG Texas Power LLCEIA registered operator and project entityEIA May 2026 generator inventory

Timeline and sources

Project milestones and public references behind the asset profile.

Project timeline

1949
1949
Historical landmark generator entered serviceASME Greens...
ASME documents the historical Greens Bayou outdoor generator installation; this is site history, not the operating date of the current six units.
Jun 1973
Jun 1973

Reporting portfolio

EIA reporting entity

NRG Texas Power LLC

Entity 54888

Operating portfolio

6 plants

1 states

Reported capacity

9,186.5 MW

Conventional Steam Coal · Natural Gas Fired Combined Cycle · Natural Gas Fired Combustion Turbine

Largest reported plants in this portfolio
Largest reported plants	Capacity	State
W A Parish	4,008.4 MW	TX
Limestone	1,849.8 MW	TX
Cedar Bayou	1,530 MW	TX
T H Wharton	1,189.9 MW	TX
Greens BayouCurrent	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 portfolio

Overview

Profile

Structured profile

Related assets

Bacliff

Remy Jade Power Station

Units and generators

Performance

Peer context

Monthly generation

Grid and market context

Market registration

Commercial, land, and environmental record

Land and environmental record

Related parties and identifiers

Relationship graph

Parties and identifiers

Timeline and sources

Project timeline

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HO Clarke Generating

Braes Bayou Plant

Brotman Power Station

ERCOT disclosed dispatch

Generation

Output by hourlocal time · 90 days through Jul 13, 2026

Latest disclosed outputhourly · 2 weeks ending Jul 13, 2026

Settlement price economics

Operating context

Interconnection record

Nearby substations

Reporting portfolio

Sources

Common questions about Greens Bayou

How big is Greens Bayou?

What kind of plant is Greens Bayou?

Where is Greens Bayou located?

Who operates Greens Bayou?

How much electricity does Greens Bayou generate?

How does Greens Bayou compare to other plants?

Co-located assets