How big is Sweeny Cogen Facility?

Sweeny Cogen Facility has a reported capacity of 572 MW. Source: EIA Form 860.

What kind of plant is Sweeny Cogen Facility?

Sweeny Cogen Facility is a Natural Gas Fired Combustion Turbine facility in Brazoria County, TX, participating in the ERCOT market.

Where is Sweeny Cogen Facility located?

Sweeny Cogen Facility is in Brazoria County, TX, inside the ERCOT balancing area.

Who operates Sweeny Cogen Facility?

Sweeny Cogen Facility is operated by Sweeny Cogeneration LLC according to the EIA generator inventory. Reporting membership does not by itself establish ultimate ownership.

How much electricity does Sweeny Cogen Facility generate?

Sweeny Cogen Facility reported 3,095.5 GWh over the twelve months to 2026-06. Figures are net generation as filed to EIA-923.

How does Sweeny Cogen Facility compare to other plants?

By capacity, Sweeny Cogen Facility ranks #71 of 825 operating plants of the same technology nationally. It ranks #3 of 75 in TX.

Sweeny Cogen Facility — 572 MW gas plant, TX

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Sweeny Cogen Facility — 572 MW gas plant, TX · Ask the Grid

Overview

Net summer capacity: 436 MW
EIA May 2026
Nameplate capacity: 572 MW
EIA May 2026
Net winter capacity: 504 MW
EIA May 2026
Operating generators: 4
143 MW nameplate each
Current owner: Phillips 66
100% since 2014
Registry anchor: Plant 55015
Sweeny Cogeneration LLC
Resource stack: 4 resources
SCLPCOGN_SCLPC_1 · SCLPCOGN_SCLPC_2

Infrastructure record

Operator: Sweeny Cogeneration LLC

Profile

Grid role: Industrial cogeneration supplying refinery steam and electricity while exporting merchant power to ERCOT.
Operating configuration: Four operating natural-gas combustion turbines at 143 MW nameplate each.
Capacity scope: EIA reports 572 MW nameplate, 436 MW net summer, and 504 MW net winter capability; Phillips 66 historically used a 440 MW net-output rating.
Current ownership: Phillips 66 increased its ownership to 100% in 2014 and currently lists Sweeny Cogeneration LLC as a subsidiary.

Structured profile

Net summer capacity: 436 MW
EIA May 2026
Nameplate capacity: 572 MW
EIA May 2026
Net winter capacity: 504 MW
EIA May 2026
Current owner: Phillips 66
100% ownership since 2014
Industrial use

Related assets

Similar plants ranked by technology, capacity, and distance.

Mark One Power Station

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Same typeComparable scale22 mi away

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Topaz Generating

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Same typeComparable scale52 mi away

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Units and generators

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

Generator	Capacity	Technology	Operation	Status
GEN1	143 MW 109 MW summer	Natural Gas Fired Combustion Turbine Natural Gas · GT	Aug 1997	Operating
GEN2	143 MW 109 MW summer	Natural Gas Fired Combustion Turbine Natural Gas · GT	Sep 1997	Operating
GEN3	143 MW 109 MW summer	Natural Gas Fired Combustion Turbine Natural Gas · GT	Oct 1997	Operating
GEN4	143 MW 109 MW summer

Performance

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

Peer context

Technology capacity: 572 MW
National rank: #71
TX rank: #3

Monthly generation

Download CSV

Latest 12 months

3.1 TWh

Reported net generation

Latest report

Jun 2026

EIA-923 monthly filing

2025 capacity factor

66.0%

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

SCLP_SCLPC_1·SCLP_SCLPC_2

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

16.796 Acres

TxGIO parcel intersecting the mapped EIA plant coordinate; parcel 245798; BRAZORIA APPRAISAL DISTRICT; tax year 2025

TxGIO land parcel intersecting

Coordinate Parcel Id

2025

245798

TxGIO parcel intersecting the mapped EIA plant coordinate; parcel 245798; BRAZORIA APPRAISAL DISTRICT; tax year 2025

TxGIO land parcel intersecting

Coordinate Parcel Market Value

2025

47030

TxGIO parcel intersecting the mapped EIA plant coordinate; parcel 245798; BRAZORIA APPRAISAL DISTRICT; tax year 2025

TxGIO land parcel intersecting

Coordinate Parcel Owner

2025

PHILLIPS 66 COMPANY

TxGIO parcel intersecting the mapped EIA plant coordinate; parcel 245798; BRAZORIA 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

Sweeny Cogeneration LLCRegistered project companyEIA May 2026 generator inventory

Timeline and sources

Project milestones and public references behind the asset profile.

Project timeline

Aug 1997
Aug 1997
First turbine entered serviceEIA May 202...
EIA reports August 1997 for GEN1.
Sep 1997
Sep 1997
Generator enters operation

Overview

Infrastructure record

Profile

Structured profile

Related assets

Mark One Power Station

Topaz Generating

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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ERCOT disclosed dispatch

Generation

Output by hourlocal time · 90 days through Jul 14, 2026

Latest disclosed outputhourly · 2 weeks ending Jul 14, 2026

Settlement price economics

Operating context

Nearby substations

Reporting portfolio

Sources

Common questions about Sweeny Cogen Facility

How big is Sweeny Cogen Facility?

What kind of plant is Sweeny Cogen Facility?

Where is Sweeny Cogen Facility located?

Who operates Sweeny Cogen Facility?

How much electricity does Sweeny Cogen Facility generate?

How does Sweeny Cogen Facility compare to other plants?

Co-located assets