How big is Gregory Power Plant?

Gregory Power Plant reports 469.8 MW natural gas of operating nameplate capacity. These technology ratings do not establish a common export limit. Source: EIA Sep 2026.

What kind of plant is Gregory Power Plant?

Gregory Power Plant is a Natural Gas Fired Combined Cycle facility in San Patricio County, TX, participating in the ERCOT market.

Where is Gregory Power Plant located?

Gregory Power Plant is in San Patricio County, TX, inside the ERCOT balancing area.

Who operates Gregory Power Plant?

Gregory Power Plant is operated by Gregory Power Partners LLC according to the EIA generator inventory. Reporting membership does not by itself establish ultimate ownership.

How much electricity does Gregory Power Plant generate?

Gregory Power Plant reported 642.2 GWh over the twelve months to 2026-07. Figures are net generation as filed to EIA-923.

How does Gregory Power Plant compare to other plants?

By capacity, Gregory Power Plant ranks #318 of 540 operating plants of the same technology nationally. It ranks #50 of 68 in TX.

Gregory Power Plant — 470 MW gas plant, TX

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Gregory Power Plant — 470 MW gas plant, TX · Ask the Grid

Generation and physical site

EIA plant 55086 · Inventory for Sep 2026.

Reported operating nameplate by technology

Natural gas: 469.8 MW

Operating generators only. Battery power is in MW; stored energy is in MWh. These ratings do not establish a shared export limit.

Generator records (3)

EIA generator status and nameplate capacity for Gregory Power Plant
Generator	Technology	Status	Power (MW)	Energy (MWh)
GT1A	Natural Gas Fired Combined Cycle	Operating	184.9	Unknown
GT1B	Natural Gas Fired Combined Cycle	Operating	184.9	Unknown
STG	Natural Gas Fired Combined Cycle	Operating	100	Unknown

Physical map location · OpenStreetMap: 27.88949, -97.25838
Filed location · EIA: 27.88929, -97.25842

Sources and observation dates

Inventory source: EIA-860M workbook (preliminary)
EIA reporting month: Sep 2026
EIA retrieved: Oct 24, 2026
OSM extract: Oct 9, 2026
OSM last mapped edit: Jan 25, 2023
Map prepared: Oct 24, 2026
Field verification: Not reported

Reporting month describes the inventory. Retrieval and map preparation describe processing; an OSM edit does not establish an in-service date.

EIA source inventory

Units and generators

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

Generator	Capacity	Technology	Operation	Status
GT1A	184.9 MW 141 MW summer	Natural Gas Fired Combined Cycle CT	Jul 2000	Operating
GT1B	184.9 MW 140 MW summer	Natural Gas Fired Combined Cycle CT	Jul 2000	Operating
STG	100 MW 85 MW summer	Natural Gas Fired Combined Cycle CA	Jul 2000	Operating

Performance

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

Peer context

Technology capacity: 469.8 MW; Natural Gas Fired Combined Cycle
National rank: #318; of 540 operating peers
TX rank: #50; of 68 operating peers

Monthly generation

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Latest 12 months

642.2 GWh

Reported net generation

Latest report

Jul 2026

EIA-923 monthly filing

2025 capacity factor

15.5%

Using current reported nameplate capacity

Monthly generation is reported through EIA-923. Capacity factor uses the current EIA nameplate capacity and is shown only for complete calendar years.

ERCOT disclosed dispatch

4 ERCOT market resources · Combined-cycle gas

Generation

3 mo through Aug 28, 2026

Avg output

314 MW

Peak output

369 MW

Capacity factor

85%

Uptime

10%

Capacity factor is average output vs. this plant's observed peak.

Output by hourlocal time · 90 days through Aug 28, 2026

0:006:0012:0018:0024:00

Latest disclosed outputhourly · 2 weeks ending Aug 28, 2026

Generation from ERCOT's 60-Day SCED Disclosure (≈60-day lag), summed over this site's market resources.

Settlement price economics

Observed ERCOT settlement prices at LGE_CC1 over 365 days (2025-10-27 to 2026-10-26). This plant is also crosswalked to LGE_LGE_GT1, LGE_LGE_GT2, LGE_LGE_STG; the point with the deepest price history is shown.

Average price: $29.76/MWh
Hourly range: -$215 to $1,558
Negative price hours: 290
TB2 spread benchmark: $38.1/kW-yr

The TB2 figure is a price benchmark, not revenue: it values one perfect-foresight cycle per day between the 2 cheapest and 2 dearest hours of each day, gross of round-trip losses, and excludes ancillary services and any physical dispatch constraint. It describes what this node’s price shape was worth over the window — it is not this asset’s realized capture, and no dispatch is assumed or modelled.

Overview

Overview

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Infrastructure record

Profile

Structured profile

Generation and physical site

Reported operating nameplate by technology

Related assets

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Units and generators

Performance

Peer context

Monthly generation

ERCOT disclosed dispatch

Generation

Output by hourlocal time · 90 days through Aug 28, 2026

Latest disclosed outputhourly · 2 weeks ending Aug 28, 2026

Settlement price economics

Grid and market context

Market registration

Operating context

Interconnection record

Nearby substations

Commercial, land, and environmental record

Land and environmental record

Related parties and identifiers

Relationship graph

Parties and identifiers

Reporting portfolio

Timeline and sources

Project timeline

Sources

Common questions about Gregory Power Plant