How big is Timmerman Power Plant?

Timmerman Power Plant has a reported capacity of 368 MW. Source: EIA Form 860M.

What kind of plant is Timmerman Power Plant?

Timmerman Power Plant is a Natural Gas Internal Combustion Engine facility in Caldwell County, TX, participating in the ERCOT market.

Where is Timmerman Power Plant located?

Timmerman Power Plant is in Caldwell County, TX, inside the ERCOT balancing area.

Who operates Timmerman Power Plant?

Timmerman Power Plant is operated by Lower Colorado River Authority according to the EIA generator inventory. Reporting membership does not by itself establish ultimate ownership.

How does Timmerman Power Plant compare to other plants?

By capacity, Timmerman Power Plant ranks #1 of 398 operating plants of the same technology nationally. It ranks #1 of 149 in TX.

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Timmerman Power Plant

Lower Colorado River Authority - Caldwell County - ERCOT

Timmerman Power Plant is a natural-gas-fueled peaker facility near Maxwell in Caldwell County, Texas, owned and operated by the Lower Colorado River Authority. It comprises two generating units, each powered by 10 Wärtsilä 50SG reciprocating engines (20 engines total). Unit 1 connected to the grid in August 2025 and Unit 2 in April 2026. The fully operational plant provides approximately 372 MW (net maximum capacity) of dispatchable generation to the ERCOT grid. The plant can ramp up and shut down in minutes to supply power during peak demand periods.

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ERCOT · Asset profile

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Timmerman Power Plant — 368 MW gas plant, TX · Ask the Grid

Overview

Nameplate capacity: 368.00000000000006 MW
Canonical EIA plant baseline.
Registry anchor: Plant 66335
plant-66335

Infrastructure record

Mapped facility footprint: 51.14 mapped acres
Mapped infrastructure geometry associated with this asset.

Structured profile

Technology: Natural Gas Internal Combustion Engine
Operator: Lower Colorado River Authority

Related assets

Similar plants ranked by technology, capacity, and distance.

Victoria

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Winchester Power Park

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Units and generators

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

Generator	Capacity	Technology	Operation	Status
G1	18 MW 18 MW summer	Natural Gas Internal Combustion Engine Natural Gas · IC	Aug 2025	Operating
G10	18 MW 18 MW summer	Natural Gas Internal Combustion Engine Natural Gas · IC	Aug 2025	Operating
G11	18.8 MW 18.6 MW summer	Natural Gas Internal Combustion Engine Natural Gas · IC	Apr 2026	Operating
G12	18.8 MW 18.6 MW summer

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.

Nearby substations

HIFLD infrastructure inventory

UNKNOWN310460

IN SERVICE · 69 kV

4.3 km

CAMP GARY

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

Contractor Selection

Aug 2, 2023

Lower Colorado River Authority selected Fagen, Inc. to design and build the Timmerman Power Plant.

Lower Colorado River Authority · Fagen, Inc.

lcra.org

Project Expansion

Apr 9, 2024

Lower Colorado River Authority announced the addition of a second generating unit at the Timmerman Power Plant.

Lower Colorado River Authority · Texas Governor Greg Abbott

lcra.org

Permitting

Jun 5, 2025

Texas Commission on Environmental Quality declared Title V air permit application 4766 for Timmerman Power Plant technically complete.

Texas Commission on Environmental Quality · Lower Colorado River Authority

tceq.texas.gov

Commercial Operation

Apr 21, 2026

Unit 2 of Timmerman Power Plant connected to the grid, bringing the entire facility to full operational status.

Lower Colorado River Authority · Texas Governor Greg Abbott

gov.texas.gov

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 / operatorEquipmentMarket / regulatorRelated asset

Timeline and sources

Project milestones and public references behind the asset profile.

Project timeline

Aug 2, 2023
Aug 2, 2023
EPC Contractor Selectedlcra.org
Lower Colorado River Authority selected Fagen, Inc. to design and build the Timmerman Power Plant.
Apr 9, 2024
Apr 9, 2024

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 Ferguson	574.6 MW	TX
Winchester Power Park	242 MW	TX
Timmerman Power PlantCurrent	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

Timmerman Power Plant

Ask about Timmerman Power Plant

Timmerman Power Plant

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Overview

Infrastructure record

Structured profile

Related assets

Victoria

Winchester Power Park

Units and generators

Grid and market context

Nearby substations

Commercial, land, and environmental record

Transactions and agreements

Related parties and identifiers

Relationship graph

Timeline and sources

Project timeline

ExxonMobil Baytown Turbine

V H Braunig

Bastrop Energy Center

Decker Creek

Parties and identifiers

Reporting portfolio

Sources

Common questions about Timmerman Power Plant

How big is Timmerman Power Plant?

What kind of plant is Timmerman Power Plant?

Where is Timmerman Power Plant located?

Who operates Timmerman Power Plant?

How does Timmerman Power Plant compare to other plants?

Co-located assets