San Miguel Substation, Atascosa County, Texas
San Miguel Substation is a 345 kV station in Atascosa County, Texas, owned by STEC with 11 transmission lines connected. It is classed as a transmission station: load service would need a new transformer or a distribution sub fed from it. 16 queued projects name it as their point of interconnection.
Station facts
| Owner | STEC |
| Voltage | 345 kV |
| Status | In Service |
| Station class | transmission (moderate confidence) |
| Likely serving utility nearby | STEC |
| Jurisdiction | Outside city limits; nearest city Christine (5.2 mi) |
| Coordinates | 28.7040, -98.4743 |
Interconnection queue at San Miguel Substation
12 generation projects name this station as point of interconnection: 10 solar and 2 wind. 4 battery storage projects, 1 with a signed interconnection agreement.
From the ERCOT GIS report. Developers, MW and dates are on Pro.
Nearby substations
| Substation | Voltage | Owner | Distance |
|---|---|---|---|
| San Miguel Switchyard | 345 kV | STEC | 0.38 mi |
| Cross | 138 kV | STEC | 4.03 mi |
| Tap307908 | 69 kV | Havelka Mike Construction | 12.59 mi |
| Poteet | 138 kV | AEP Texas | 15.9 mi |
| Pleasanton | 138 kV | AEP Texas | 16.81 mi |
| Pleasanton | 345 kV | AEP Texas | 16.85 mi |
| Tilden | 138 kV | STEC | 17.07 mi |
Wholesale prices nearby
The SOUTH load zone averaged $48.57/MWh day-ahead over the last 7 days. Nearest generator pricing nodes: SAN_SANMIGG1 $45.57, LYSSY_RN $45.81 and BR_VHB6CT5_6 $44.36.
See San Miguel Substation on the map
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Sources: HIFLD and OpenStreetMap substations and lines, ERCOT GIS report (queue, 2026-09), ERCOT day-ahead prices, TxDOT and StratMap boundaries, Barrio Energy research. Updated 2026-11-09. Screening data only; the serving utility confirms capacity.