Frio County, Texas: power grid and siting data
Frio County is in ERCOT's SOUTH load zone. It has 13 mapped substations, owned mostly by STEC and AEP Texas; the highest voltage is 345 kV. The ERCOT queue lists 2 generation projects (2 solar) and 3 battery storage projects here.
Substations in Frio County
1 at 345 kV, 12 at 138 kV.
| Substation | Voltage | Owner | Lines | |
|---|---|---|---|---|
| Pearsall | 345 kV | AEP Texas | 2 | map |
| Pearsall Power Plant | 138 kV | STEC | 11 | map |
| Dilley Switching | 138 kV | AEP Texas | 7 | map |
| Moore | 138 kV | STEC | 4 | map |
| Derby | 138 kV | STEC | 4 | map |
| Big Foot | 138 kV | AEP Texas | 4 | map |
| Dilley | 138 kV | AEP Texas | 3 | map |
| Palo Duro | 138 kV | STEC | 3 | map |
| Frio Town | 138 kV | STEC | 2 | map |
| Moore | 138 kV | STEC | 2 | map |
| Dilley | 138 kV | STEC | 2 | map |
| Big Foot | 138 kV | STEC | 2 | map |
| Unnamed station | 138 kV | STEC | 1 | map |
ERCOT interconnection queue
2 generation projects are queued in Frio County: 2 solar. By stage: 2 in full interconnection study. 3 battery storage projects are queued, 0 with a signed interconnection agreement.
From the ERCOT GIS report. Project names, developers, MW and dates are on Pro.
Planned transmission
1 planned grid project touches Frio County: 1 new or rebuilt line.
Wholesale power prices
The SOUTH load zone averaged $48.57/MWh day-ahead over the last 7 days. Nearest generator pricing nodes: PEARSALL_RN $45.48, PEARSA_1_24 $45.48 and ERSL_RN $45.42.
ERCOT day-ahead settlement point prices. Hourly history, battery spreads and real-time prices are on the map.
Data centers and large loads
1 announced data center campus in Frio County, 1 at or above ERCOT's 75 MW large load threshold.
- HC Capital Partners shifts Energy Ranch to power infrastructure San Antonio Business Journal 2026-07-15
- HC Capital and Herrmann launch Energy Ranch power and data campus PR Newswire 2026-01-06
Jurisdiction
Nearest city to the county center: Pearsall (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 Frio 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.