How big is Thomas C Ferguson?

Thomas C Ferguson has a reported capacity of 574.6 MW. Source: EIA Form 860.

What kind of plant is Thomas C Ferguson?

Thomas C Ferguson is a Natural Gas Fired Combined Cycle facility in Llano County, TX, participating in the ERCOT market.

Where is Thomas C Ferguson located?

Thomas C Ferguson is in Llano County, TX, inside the ERCOT balancing area.

Who operates Thomas C Ferguson?

Thomas C Ferguson is operated by Lower Colorado River Authority according to the EIA generator inventory. Reporting membership does not by itself establish ultimate ownership.

How much electricity does Thomas C Ferguson generate?

Thomas C Ferguson reported 3,678.8 GWh over the twelve months to 2026-04. Figures are net generation as filed to EIA-923.

Where does Thomas C Ferguson connect to the grid?

Thomas C Ferguson interconnects at LONGPRAIRIE, on the LCRA-TSP system.

How does Thomas C Ferguson compare to other plants?

By capacity, Thomas C Ferguson ranks #273 of 538 operating plants of the same technology nationally. It ranks #41 of 69 in TX.

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Natural Gas Fired Combined CycleERCOT · Llano County

Thomas C Ferguson

City of San Marcos · Llano County · ERCOT

Thomas C Ferguson is a natural gas-fired power facility with 574.6 MW of EIA-reported nameplate capacity in Llano County, Texas, registered as EIA Plant ID 4937. City of San Marcos Electric Utility is the current owner; Lower Colorado River Authority is the registered plant entity or operator. The Ferguson Replacement Project was the first power plant issued a greenhouse-gas permit by the U.S. Environmental Protection Agency under the federal rules cited by Fluor; LCRA describes the permit as the first in Texas under those rules.

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plant:plant-4937

Ask about Thomas C Ferguson

Investigate technology, capacity, output, price behavior, ownership, and related facilities using this profile plus current grid data.

Overview

Key fields

Reported capacity: 574.6 MW
EIA-reported nameplate capacity; other nameplate and seasonal ratings may differ.
Technology: Natural Gas Fired Combined Cycle
Primary generation technology.
Registry anchor: Plant 4937
Lower Colorado River Authority · Llano County · ERCOT
Operating status: Operating
Thomas C Ferguson is operating.
Grid connection: LONGPRAIRIE
345 kV · LCRA-TSP
Resource stack: 4 resources
FERGCC_CC1_1 · FERGCC_CC1_2

Infrastructure record

Mapped facility footprint: 60.99 mapped acres
Mapped infrastructure geometry associated with this asset.

Profile

Grid role: Utility-scale combined-cycle generation serving the ERCOT/LCRA system.
Grid connection: LONGPRAIRIE · 345 kV · LCRA-TSP.
Context: The Ferguson Replacement Project was the first power plant issued a greenhouse-gas permit by the U.S. Environmental Protection Agency under the federal rules cited by Fluor; LCRA describes the permit as the first in Texas under those rules.
Physical build: Fluor completed the 540-MW Ferguson Replacement natural-gas combined-cycle plant in Horseshoe Bay, Llano County, in 2014. The documented equipment scope comprises two GE Frame 7FA gas-turbine generators in a two-on-one configuration, two heat-recovery steam generators, and one Toshiba 195-MW steam-turbine generator; the current plant record identifies three generating units in total.

Structured profile

Reported capacity: 574.6 MW
Natural Gas Fired Combined Cycle
Operating status: operating
Thomas C Ferguson is operating.
Interconnection: LONGPRAIRIE
345 kV · LCRA-TSP
Location: Llano County
ERCOT
Operator

Units and generators

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

Generator	Capacity	Technology	Operation	Status
1	446 MW 350 MW summer	Natural Gas Steam Turbine Natural Gas · ST	Aug 1974 Retirement: Jan 2015	Operating
CT-1	185.3 MW 168 MW summer	Natural Gas Fired Combined Cycle Natural Gas · CT	Aug 2014	Operating
CT-2	185.3 MW 168 MW summer	Natural Gas Fired Combined Cycle Natural Gas · CT	Aug 2014	Operating
STG

Performance

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

Peer context

Technology capacity: 574.6 MW
National rank: #273
TX rank: #41

Monthly generation

Download CSV

Latest 12 months

3.68 TWh

Reported net generation

Latest report

Apr 2026

EIA-923 monthly filing

2025 capacity factor

72.1%

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

FERGCC_CC1

high confidence spatial and capacity match

Market resources

4 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.

Transactions and agreements

EPC Award

Nov 11, 2011

LCRA awarded Fluor a lump-sum turnkey engineering, procurement and construction contract for the Ferguson Replacement Project. Contract value undisclosed; overall project approximately $500 million. Fluor completed the 540-MW combined-cycle plant in 2014.

Lower Colorado River Authority · Fluor Corporation

Gas-Fired Power Plant - Lower Colorado River Authority

Ownership Acquisition

Jan 2013

City of San Marcos agreed to acquire 3.52% ownership interest in Thomas C. Ferguson plant's capacity and energy production for approximately $18 million, representing 3.52% of estimated $500 million project costs. LCRA Board approved January 16, 2013.

$18MCity of San Marcos · Lower Colorado River Authority

Source

Land and environmental record

Air Permit

Permit No. 19

TCEQ AIR OPERATING PERMITS; PERMIT; status ACTIVE

TCEQ AIR OPERATING PERMITS: 19

Air Permit

Permit No. 33640

TCEQ AIR NEW SOURCE PERMITS; REGISTRATION; status ACTIVE

TCEQ AIR NEW SOURCE PERMITS: 33640

Air Permit

Permit No. 93938

TCEQ AIR NEW SOURCE PERMITS; PERMIT; status ACTIVE

TCEQ AIR NEW SOURCE PERMITS: 93938

Air Permit

Permit No. GHGPSDTX1

TCEQ Air New Source Permit; EPA Permit; status ACTIVE; greenhouse-gas Prevention of Significant Deterioration permit.

TCEQ AIR NEW SOURCE PERMITS: GHGPSDTX1

Environmental Compliance Milestone

Sep 15, 2016

EPA approval of alternative natural-gas flowmeter calibration procedure for Units CT-1 and CT-2

On September 15, 2016, EPA approved LCRA's petition to use an alternative calibration procedure for additional natural-gas fuel-flow meters at Units CT-1 and CT-2, subject to conditions. Meters support Part 75 SO2 and heat-input monitoring.

Source

Mapped facility footprint

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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AssetOwner / operatorContractorRelated asset

Timeline and sources

Project milestones and public references behind the asset profile.

Project timeline

1974
1974
Predecessor ConstructionLower Color...
The original 420-MW Thomas C. Ferguson Power Plant was built.
Aug 1974
Aug 1974

Reporting portfolio

EIA reporting entity

Lower Colorado River Authority

Entity 11269

Operating portfolio

12 plants

1 states

Reported capacity

4,208.1 MW

Conventional Hydroelectric · Conventional Steam Coal · Natural Gas Fired Combined Cycle

Largest reported plants in this portfolio
Largest reported plants	Capacity	State
Fayette Power Project	1,690 MW	TX
Sim Gideon	623 MW	TX
Lost Pines 1 Power Project	609 MW	TX
Thomas C FergusonCurrent	574.6 MW	TX
Winchester Power Park	242 MW	TX
Timmerman Power Plant	180 MW	TX
Marshall Ford	108 MW	TX
Buchanan Dam (TX)	54.9 MW	TX

Portfolio membership follows the latest EIA-860 reporting entity. It does not imply ultimate ownership.

View full reporting portfolio

Ask about Thomas C Ferguson

Ask about Thomas C Ferguson

Overview

Key fields

Infrastructure record

Profile

Structured profile

Units and generators

Performance

Peer context

Monthly generation

Grid and market context

Market registration

Commercial, land, and environmental record

Transactions and agreements

Land and environmental record

Related parties and identifiers

Relationship graph

Timeline and sources

Project timeline

ERCOT disclosed dispatch

Generation

Output by hourlocal time · 90 days through Jun 4, 2026

Latest disclosed outputhourly · 2 weeks ending Jun 4, 2026

Settlement price economics

Operating context

Nearby substations

Parties and identifiers

Reporting portfolio

Sources

Common questions about Thomas C Ferguson

How big is Thomas C Ferguson?

What kind of plant is Thomas C Ferguson?

Where is Thomas C Ferguson located?

Who operates Thomas C Ferguson?

How much electricity does Thomas C Ferguson generate?

Where does Thomas C Ferguson connect to the grid?

How does Thomas C Ferguson compare to other plants?

Co-located assets

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