J K Spruce
CPS EnergyBexar County
J.K. Spruce is CPS Energy's two-unit coal plant at Calaveras Lake in Bexar County, registered as EIA Plant ID 7097. EIA's May 2026 inventory lists 1,488.5 MW of nameplate capacity and 1,345 MW of net summer and winter capability. ERCOT maps the units to resources CALAVERS_JKS1 and CALAVERS_JKS2 and settlement points CALAVER_JKS1 and CALAVER_JKS2. CPS Energy approved Spruce 1 to cease operation in December 2028 and plans to convert Spruce 2 to natural gas; its January 2026 financial disclosure targets conversion by the end of 2027, while ERCOT's May 2025 resource plan models gas operation beginning June 1, 2028.
Mapped infrastructure geometry associated with this asset.
EIA May 2026
City of San Antonio municipal utility
ERCOT resource-node mapping
Spruce 1 / Spruce 2
EIA plant 7097 · Inventory for Sep 2026.
| Generator | Technology | Status | Power (MW) | Energy (MWh) |
|---|---|---|---|---|
| 1 | Conventional Steam Coal | Operating | 566 | Unknown |
| 2 | Conventional Steam Coal | Operating | 922.5 | Unknown |
Similar plants ranked by technology, capacity, and distance.
Current generator records and technology attributes reported through EIA-860.
| Generator | Capacity | Technology | Operation | Status |
|---|---|---|---|---|
| 1 | 566 MW 560 MW summer | Conventional Steam Coal ST | Dec 1992 Retirement: Dec 2028 | Operating |
| 2 | 922.5 MW 785 MW summer | Conventional Steam Coal ST | May 2010 | Operating |
Monthly EIA generation history and recent market-resource behavior where linked telemetry is available.
Deterministic links to ERCOT market resources, price records, outage disclosures, queue records, and nearby infrastructure. Candidate joins remain labeled until corroborated.
Source-backed project transactions, agreements, land records, permits, and environmental disclosures. Portfolio and adjacent-project facts remain explicitly scoped.
Parties, market resources, and identifiers tied to this asset, with owner, operator, developer, EPC, compliance provider, and interconnecting entity roles kept separate.
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Project milestones and public references behind the asset profile.
EIA-860 lists generator 1 with this operating date.
7,484.61 acres · City of San Antonio
Monthly generation is reported through EIA-923. Capacity factor uses the current EIA nameplate capacity and is shown only for complete calendar years.
2 ERCOT market resources · Coal / lignite
Capacity factor is average output vs. this plant's observed peak.
Observed ERCOT settlement prices at CALAVER_JKS1 over 365 days (2025-10-26 to 2026-10-25). This plant is also crosswalked to CALAVER_JKS2, CALAVER_JTD1, CALAVER_JTD2; the point with the deepest price history is shown.
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.
| Largest reported plants | Capacity | State | |
|---|---|---|---|
| J K SpruceCurrent | 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 Bay | 730.2 MW | TX | |
| Topaz Generating | 605 MW | TX | |
| Arthur Von Rosenberg | 575 MW | TX | |
| Mark One Power Station | 484 MW | TX |
Portfolio membership follows the latest EIA-860 reporting entity. It does not imply ultimate ownership.
View full reporting portfolioEIA-860 lists generator 2 with this operating date.
ERCOT SCED disclosure is delayed, so plant performance windows end at the latest disclosed interval.
EIA-860 lists a planned retirement for generator 1.
Answered from the published record above. Questions whose inputs this profile does not carry are omitted rather than estimated.
J K Spruce reports 1,488.5 MW coal of operating nameplate capacity. These technology ratings do not establish a common export limit. Source: EIA Sep 2026.
J K Spruce is a Conventional Steam Coal facility in Bexar County, TX, participating in the ERCOT market.
J K Spruce is in Bexar County, TX, inside the ERCOT balancing area.
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.
J K Spruce reports a commercial operation date of 1992-2010. Current status: operating. Source: EIA Sep 2026.
J K Spruce reported 6,334 GWh over the twelve months to 2026-07. Figures are net generation as filed to EIA-923.
J K Spruce settles at CALAVER_JKS1, interconnects at CALAVERAS.
By capacity, J K Spruce ranks #42 of 205 operating plants of the same technology nationally. It ranks #6 of 11 in TX.
Plants within 25 km, nearest first, regardless of technology. Proximity is straight-line distance between mapped plant coordinates; it does not by itself establish a shared point of interconnection.
