Atascosa County, Texas: power grid and siting data
Atascosa County is in ERCOT's SOUTH load zone. It has 16 mapped substations, owned mostly by STEC, AEP Texas and Havelka Mike Construction; the highest voltage is 345 kV. The ERCOT queue lists 8 generation projects (8 solar) and 6 battery storage projects here.
Substations in Atascosa County
3 at 345 kV, 8 at 138 kV, 5 at 69 kV and below.
| Substation | Voltage | Owner | Lines | |
|---|---|---|---|---|
| San Miguel | 345 kV | STEC | 11 | map |
| Pleasanton | 345 kV | AEP Texas | 4 | map |
| San Miguel Switchyard | 345 kV | STEC | 3 | map |
| Pleasanton | 138 kV | AEP Texas | 3 | map |
| Poteet | 138 kV | AEP Texas | 3 | map |
| Fashing | 138 kV | STEC | 2 | map |
| Oaks | 138 kV | STEC | 2 | map |
| Rossville | 138 kV | STEC | 2 | map |
| Pleasanton | 138 kV | STEC | 2 | map |
| Cross | 138 kV | STEC | 2 | map |
| Loxley | 138 kV | AEP Texas | map | |
| Tap307908 | 69 kV | Havelka Mike Construction | 6 | map |
| Poteet | 69 kV | STEC | 3 | map |
| Charlotte | 69 kV | AEP Texas | 3 | map |
| Charlotte | 69 kV | STEC | 2 | map |
| Fashing | 69 kV | AEP Texas | 1 | map |
ERCOT interconnection queue
8 generation projects are queued in Atascosa County: 8 solar. By stage: 1 with a signed interconnection agreement and 7 in full interconnection study. 6 battery storage projects are queued, 1 with a signed interconnection agreement.
From the ERCOT GIS report. Project names, developers, MW and dates are on Pro.
Planned transmission
11 planned grid projects touch Atascosa County: 8 new or rebuilt lines and 3 substation upgrades, 9 at 345 kV or above.
Wholesale power prices
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.
ERCOT day-ahead settlement point prices. Hourly history, battery spreads and real-time prices are on the map.
Jurisdiction
Nearest city to the county center: Jourdanton (0 mi). Outside city limits and ETJ, development falls under county rules and state law. City limits and estimated ETJ are on the map.
Nearby counties
See Atascosa County on the map
Every substation, line, queue project, pipeline and price node in Texas, plus Dub, an AI landman who answers questions about any spot. Free account, no card.
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.