How big is J K Spruce?

J K Spruce has a reported capacity of 1,488.5 MW. Source: EIA preliminary monthly generator inventory.

What kind of plant is J K Spruce?

J K Spruce is a Conventional Steam Coal facility in Bexar County, TX, participating in the ERCOT market.

Where is J K Spruce located?

J K Spruce is in Bexar County, TX, inside the ERCOT balancing area.

Who operates J K Spruce?

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

When did J K Spruce start operating?

J K Spruce reports a commercial operation date of 1992-2010. Current status: operating. Source: EIA preliminary monthly generator inventory.

How much electricity does J K Spruce generate?

J K Spruce reported 6,191.4 GWh over the twelve months to 2026-06. Figures are net generation as filed to EIA-923.

Where does J K Spruce connect to the grid?

J K Spruce settles at CALAVER_JKS1, interconnects at CALAVERAS.

How does J K Spruce compare to other plants?

By capacity, J K Spruce ranks #43 of 206 operating plants of the same technology nationally. It ranks #6 of 11 in TX.

J K Spruce — 1,489 MW coal plant, Bexar County, TX

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J K Spruce — 1,489 MW coal plant, Bexar County, TX · Ask the Grid

Overview

Net summer capability: 1,345 MW
Spruce 1: 560 MW · Spruce 2: 785 MW.
Nameplate capacity: 1,488.5 MW
Two operating EIA generators.
Technology: Conventional steam coal
Two pulverized-coal units.
Registry anchor: Plant 7097
City of San Antonio · Bexar County
Resource node: CALAVERS
CALAVERAS substation · ERCOT.
Resource stack: 2 resources
CALAVERS_JKS1 · CALAVERS_JKS2

Infrastructure record

Operator: City of San Antonio - (TX)

Profile

ERCOT configuration: Two South-zone coal resources, CALAVERS_JKS1 and CALAVERS_JKS2, mapped to the CALAVERS resource node.
Operating role: CPS Energy reports 560 MW for Spruce 1 and 785 MW for Spruce 2; both units are normally base loaded.
Transition plan: Spruce 1 is approved to cease operation in December 2028. Spruce 2 is planned for conversion to natural gas, with CPS and ERCOT currently publishing different transition dates.

Structured profile

Net summer / winter: 1,345 / 1,345 MW
EIA May 2026
Owner / operator: CPS Energy
City of San Antonio municipal utility
Settlement points: CALAVER_JKS1 · CALAVER_JKS2
ERCOT resource-node mapping
Operating dates: 1992 / 2010
Spruce 1 / Spruce 2
Coordinate parcel

Related assets

Similar plants ranked by technology, capacity, and distance.

Fayette Power Project

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Oak Grove (TX)

Coal · 1,795.4 MW

Robertson County

Same typeComparable scale169 mi away

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Units and generators

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

Generator	Capacity	Technology	Operation	Status
1	566 MW 560 MW summer	Conventional Steam Coal Subbituminous Coal · ST	Dec 1992 Retirement: Dec 2028	Operating
2	922.5 MW 785 MW summer	Conventional Steam Coal Subbituminous Coal · ST	May 2010	Operating

Performance

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

Peer context

Technology capacity: 1,488.5 MW
National rank: #43
TX rank: #6

Monthly generation

Download CSV

Latest 12 months

6.19 TWh

Reported net generation

Latest report

Jun 2026

EIA-923 monthly filing

2025 capacity factor

49.6%

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.

Market registration

ERCOT public disclosures

Settlement point

CALAVER_JKS1·CALAVER_JKS2

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 Identifiers

Special Conditions Permit Nos. 70492 and PSDTX1037; NSR/MSS Permit No. 1652 (site review/MSS renewal)

Primary TCEQ air permit identifiers for Calaveras Lake/J. K. Spruce facility. Permit special conditions and NSR/MSS permit review (Permit No. 1652) cited in TCEQ permit documents and site review records.

Source

Coordinate Parcel Area

2025

7484.61 Acres

TxGIO parcel intersecting the mapped EIA plant coordinate; parcel 336866; BEXAR APPRAISAL DISTRICT; tax year 2025

TxGIO land parcel 336866

Coordinate Parcel Id

2025

336866

TxGIO parcel intersecting the mapped EIA plant coordinate; parcel 336866; BEXAR APPRAISAL DISTRICT; tax year 2025

TxGIO land parcel 336866

Coordinate Parcel Owner

2025

CITY OF SAN ANTONIO

TxGIO parcel intersecting the mapped EIA plant coordinate; parcel 336866; BEXAR APPRAISAL DISTRICT; tax year 2025

TxGIO land parcel 336866

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.

AssetContractorEquipmentOrganization

Timeline and sources

Project milestones and public references behind the asset profile.

Project timeline

Dec 1992
Dec 1992
Generator enters operationEIA-860
EIA-860 lists generator 1 with this operating date.
May 2010
May 2010
Generator enters operation

Reporting portfolio

EIA reporting entity

City of San Antonio - (TX)

Entity 16604

Operating portfolio

16 plants

1 states

Reported capacity

9,412.3 MW

Batteries · Conventional Steam Coal · Natural Gas Fired Combined Cycle

Largest reported plants in this portfolio
Largest reported plants	Capacity	State
J K SpruceCurrent	1,488.5 MW	TX
V H Braunig	1,138 MW	TX
Barney M Davis	1,082.2 MW	TX
Rio Nogales Power Project	940.2 MW	TX
O W Sommers	892 MW	TX
Nueces Bay	730.2 MW	TX
Topaz Generating	605 MW	TX
Arthur Von Rosenberg	575 MW	TX

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

View full reporting portfolio

Overview

Infrastructure record

Profile

Structured profile

Related assets

Fayette Power Project

Oak Grove (TX)

Units and generators

Performance

Peer context

Monthly generation

Grid and market context

Market registration

Commercial, land, and environmental record

Land and environmental record

Related parties and identifiers

Relationship graph

Timeline and sources

Project timeline

Limestone

Sandy Creek Energy Station

Coleto Creek

San Miguel

ERCOT disclosed dispatch

Generation

Output by hourlocal time · 90 days through Jul 13, 2026

Latest disclosed outputhourly · 2 weeks ending Jul 13, 2026

Settlement price economics

Operating context

Nearby substations

Parties and identifiers

Reporting portfolio

Sources

Common questions about J K Spruce

How big is J K Spruce?

What kind of plant is J K Spruce?

Where is J K Spruce located?

Who operates J K Spruce?

When did J K Spruce start operating?

How much electricity does J K Spruce generate?

Where does J K Spruce connect to the grid?

How does J K Spruce compare to other plants?

Co-located assets