How big is Wolf Hollow II?

Wolf Hollow II has a reported capacity of 1,231.2 MW. Source: EIA Form 860.

What kind of plant is Wolf Hollow II?

Wolf Hollow II is a Natural Gas Fired Combined Cycle facility in Hood County, TX, participating in the ERCOT market.

Where is Wolf Hollow II located?

Wolf Hollow II is in Hood County, TX, inside the ERCOT balancing area.

Who operates Wolf Hollow II?

Wolf Hollow II is operated by Constellation Power, Inc according to the EIA generator inventory. Reporting membership does not by itself establish ultimate ownership.

How much electricity does Wolf Hollow II generate?

Wolf Hollow II reported 5,018.7 GWh over the twelve months to 2026-06. Figures are net generation as filed to EIA-923.

How does Wolf Hollow II compare to other plants?

By capacity, Wolf Hollow II ranks #53 of 538 operating plants of the same technology nationally. It ranks #5 of 69 in TX.

Wolf Hollow II — 1,231 MW gas plant, Hood County, TX

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Wolf Hollow II — 1,231 MW gas plant, Hood County, TX · Ask the Grid

Overview

Net summer capability: 1,103.4 MW
Three operating generators · EIA May 2026
Nameplate capacity: 1,231.2 MW
CGT4 · CGT5 · STG6
Net winter capability: 1,181.0 MW
EIA May 2026
Technology: Natural-gas combined cycle
2×1 GE HA configuration
Commercial operation: June 2017
Constellation and EIA
Registry anchor: Plant 59812
Hood County · ERCOT

Infrastructure record

Operator: Constellation Power, Inc

Profile

Physical build: Two GE 7HA.02 combustion turbines and one GE D602 steam turbine in a 2×1 combined-cycle configuration.
Operating capability: EIA reports 1,103.4 MW net summer and 1,181.0 MW net winter capability across three operating generators.
Grid identity: ERCOT station WHCCS2; unit identifiers CT4, CT5, and STG6.
Cooling: Air-cooled condenser rather than a wet cooling tower.

Structured profile

Owner / operator: Constellation
Current company facility record
Project company: Wolf Hollow II Power LLC
ERCOT and parcel records
ERCOT station: WHCCS2
CT4 · CT5 · STG6
Ramp rate: 50 MW/min
GE project specification
Address

Related assets

Similar plants ranked by technology, capacity, and distance.

Jack County

Natural Gas · 1,280 MW

Wise County

Same typeComparable scale54 mi away

Compare with this plant

Wolf Hollow I LP

Natural Gas · 788.4 MW

Hood County

Same type0 mi away

Compare with this plant

Units and generators

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

Generator	Capacity	Technology	Operation	Status
CGT4	360 MW 327.8 MW summer	Natural Gas Fired Combined Cycle Natural Gas · CT	Jun 2017	Operating
CGT5	360 MW 329.3 MW summer	Natural Gas Fired Combined Cycle Natural Gas · CT	Jun 2017	Operating
STG6	511.2 MW 446.3 MW summer	Natural Gas Fired Combined Cycle Natural Gas · CA	Jun 2017	Operating

Performance

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

Peer context

Technology capacity: 1,231.2 MW
National rank: #53
TX rank: #5

Monthly generation

Download CSV

Latest 12 months

5.02 TWh

Reported net generation

Latest report

Jun 2026

EIA-923 monthly filing

2025 capacity factor

50.4%

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.

Nearby substations

HIFLD infrastructure inventory

UNKNOWN300502

IN SERVICE · 345 kV

0.2 km

UNKNOWN301163

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

Air Permit

Permit No. 3848

TCEQ AIR OPERATING PERMITS; PERMIT; status ACTIVE

TCEQ AIR OPERATING PERMITS: 3848

Air Permit

Permit No. 83638

TCEQ AIR NEW SOURCE PERMITS; PERMIT; status ACTIVE

TCEQ AIR NEW SOURCE PERMITS: 83638

Air Permit

Permit No. GHGPSDTX238

TCEQ AIR NEW SOURCE PERMITS; EPA PERMIT; status ACTIVE

TCEQ AIR NEW SOURCE PERMITS: GHGPSDTX238

Air Permit

Permit No. PSDTX1110

TCEQ AIR NEW SOURCE PERMITS; EPA PERMIT; status ACTIVE

TCEQ AIR NEW SOURCE PERMITS: PSDTX1110

Coordinate Parcel Area

2025

182.039 Acres

TxGIO parcel intersecting the mapped EIA plant coordinate; parcel 47366; HOOD APPRAISAL DISTRICT; tax year 2025

TxGIO land parcel 47366

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.

AssetEquipment

Parties and identifiers

OrganizationRoleBasis

plant:plant-59812Grid selectionCanonical asset page /assets/facilities/wolf-hollow-ii.

Timeline and sources

Project milestones and public references behind the asset profile.

Project timeline

Jun 2017
Jun 2017
Commercial OperationConstellati...
Constellation and EIA report June 2017 commercial operation.

Sources

PublisherReferenceType

U.S. Energy Information AdministrationEIA-860 generator inventoryFederal registry

U.S. Energy Information AdministrationEIA-923 generation filingsFederal filing

ConstellationWolf Hollow II facility pageofficial

EIA reporting entity

Constellation Power, Inc

Entity 6035

Operating portfolio

17 plants

4 states

Reported capacity

7,734.1 MW

Conventional Hydroelectric · Hydroelectric Pumped Storage · Natural Gas Fired Combined Cycle

Largest reported plants in this portfolio
Largest reported plants	Capacity	State
Handley	1,314.8 MW	TX
Wolf Hollow IICurrent	1,231.2 MW	TX
Colorado Bend II	1,230.3 MW	TX
Muddy Run	1,072 MW	PA
Eddystone Generating Station	861.6 MW	PA
Croydon CT Generating Station	546.4 MW	PA
Conowingo	530.8 MW	MD
Exelon West Medway II LLC	263.6 MW	MA

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

View full reporting portfolio

Wolf Hollow II

Wolf Hollow II

Overview

Infrastructure record

Profile

Structured profile

Related assets

Jack County

Wolf Hollow I LP

Units and generators

Performance

Peer context

Monthly generation

Grid and market context

Nearby substations

Commercial, land, and environmental record

Land and environmental record

Related parties and identifiers

Relationship graph

Parties and identifiers

Timeline and sources

Project timeline

Sources

Midlothian Energy Facility

Handley

Thad Hill Energy Center

Freestone Energy Center

Reporting portfolio

Common questions about Wolf Hollow II

How big is Wolf Hollow II?

What kind of plant is Wolf Hollow II?

Where is Wolf Hollow II located?

Who operates Wolf Hollow II?

How much electricity does Wolf Hollow II generate?

How does Wolf Hollow II compare to other plants?

Co-located assets