How big is Nueces Bay?

Nueces Bay reports 730.2 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 Nueces Bay?

Nueces Bay is a Natural Gas Fired Combined Cycle facility in Nueces County, TX, participating in the ERCOT market.

Where is Nueces Bay located?

Nueces Bay is in Nueces County, TX, inside the ERCOT balancing area.

Who operates Nueces Bay?

Nueces Bay is operated by City of San Antonio - (TX) according to the EIA generator inventory. Reporting membership does not by itself establish ultimate ownership.

How much electricity does Nueces Bay generate?

Nueces Bay reported 2,081.9 GWh over the twelve months to 2026-07. Figures are net generation as filed to EIA-923.

How does Nueces Bay compare to other plants?

By capacity, Nueces Bay ranks #164 of 540 operating plants of the same technology nationally. It ranks #27 of 68 in TX.

Nueces Bay — 730 MW gas plant, Nueces County, TX

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Nueces Bay — 730 MW gas plant, Nueces County, TX · Ask the Grid

Generation and physical site

EIA plant 3441 · Inventory for Sep 2026.

Reported operating nameplate by technology

Natural gas: 730.2 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 (5)

EIA generator status and nameplate capacity for Nueces Bay
Generator	Technology	Status	Power (MW)	Energy (MWh)
7	Natural Gas Fired Combined Cycle	Operating	351	Unknown
8	Natural Gas Fired Combined Cycle	Operating	189.6	Unknown
9	Natural Gas Fired Combined Cycle	Operating	189.6	Unknown
5	Natural Gas Steam Turbine	Retired	32.5	Unknown
6	Natural Gas Steam Turbine	Retired	180	Unknown

Physical map location · OpenStreetMap: 27.82029, -97.41886
Filed location · EIA: 27.81941, -97.41920

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
7	351 MW 319 MW summer	Natural Gas Fired Combined Cycle CA	Jul 1972	Operating
8	189.6 MW 157 MW summer	Natural Gas Fired Combined Cycle CT	Mar 2010	Operating
9	189.6 MW 157 MW summer	Natural Gas Fired Combined Cycle CT	Mar 2010	Operating

Performance

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

Peer context

Technology capacity: 730.2 MW; Natural Gas Fired Combined Cycle
National rank: #164; of 540 operating peers
TX rank: #27; of 68 operating peers

Monthly generation

Download CSV

Latest 12 months

2.08 TWh

Reported net generation

Latest report

Jul 2026

EIA-923 monthly filing

2025 capacity factor

28.5%

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

2 ERCOT market resources · Combined-cycle gas

Generation

3 mo through Aug 27, 2026

Avg output

432 MW

Peak output

639 MW

Capacity factor

68%

Uptime

100%

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

Output by hourlocal time · 90 days through Aug 27, 2026

0:006:0012:0018:0024:00

Latest disclosed outputhourly · 2 weeks ending Aug 27, 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 NUECES_B_CC1 over 365 days (2025-10-26 to 2026-10-25). This plant is also crosswalked to NUE_NUECESG7, NUE_NUECESG8, NUE_NUECESG9; the point with the deepest price history is shown.

Average price: $29.37/MWh
Hourly range: -$159 to $764
Negative price hours: 302
TB2 spread benchmark: $37.8/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.

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. 181559

TCEQ AIR NEW SOURCE PERMITS; REGISTRATION; status ACTIVE

TCEQ AIR NEW SOURCE PERMITS: 181559

Air Permit

Permit No. 40

TCEQ AIR OPERATING PERMITS; PERMIT; status PENDING

TCEQ AIR OPERATING PERMITS: 40

Air Permit

Permit No. 81594

TCEQ AIR NEW SOURCE PERMITS; PERMIT; status ACTIVE

TCEQ AIR NEW SOURCE PERMITS: 81594

Air Permit

Permit No. 94484

TCEQ AIR NEW SOURCE PERMITS; REGISTRATION; status ACTIVE

TCEQ AIR NEW SOURCE PERMITS: 94484

Air Permit

Permit No. PSDTX1091

TCEQ AIR NEW SOURCE PERMITS; EPA PERMIT; status ACTIVE

TCEQ AIR NEW SOURCE PERMITS: PSDTX1091

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 / operatorRelated asset

Parties and identifiers

OrganizationRoleBasis

CPS EnergyPortfolio ownerFinancing covers a portfolio that includes Nueces Bay.

CPS EnergyPortfolio operatorFinancing covers a portfolio that includes Nueces Bay.

NUECES_B_CC1_1, NUECES_B_CC1_2Market resourcesLinked ERCOT resources.

Reporting portfolio

EIA reporting entity

City of San Antonio - (TX)

Entity 16604

Operating portfolio

16 plants

1 states

Reported capacity

8,686.1 MW

Batteries · Conventional Steam Coal · Natural Gas Fired Combined Cycle

Largest reported plants in this portfolio
Largest reported plants	Capacity	State
J K Spruce	1,488.5 MW	TX
Rio Nogales Power Project	1,108 MW	TX
Barney M Davis	1,082.2 MW	TX
O W Sommers	892 MW	TX
Nueces BayCurrent	730.2 MW	TX
Topaz Generating	605 MW	TX

Overview

Overview

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Infrastructure record

Profile

Structured profile

Generation and physical site

Reported operating nameplate by technology

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Barney M Davis

Magic Valley Generating Station

Formosa Utility Venture Ltd

Units and generators

Performance

Peer context

Monthly generation

ERCOT disclosed dispatch

Generation

Output by hourlocal time · 90 days through Aug 27, 2026

Latest disclosed outputhourly · 2 weeks ending Aug 27, 2026

Settlement price economics

Grid and market context

Market registration

Operating context

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 Nueces Bay

How big is Nueces Bay?

What kind of plant is Nueces Bay?

Where is Nueces Bay located?

Who operates Nueces Bay?

How much electricity does Nueces Bay generate?

How does Nueces Bay compare to other plants?

Co-located assets