McMullen County, Texas: power grid and siting data
McMullen County is in ERCOT's SOUTH load zone. It has 1 mapped substation, owned mostly by STEC; the highest voltage is 138 kV. The ERCOT queue lists 1 generation project (1 solar) and 0 battery storage projects here.
Substations in McMullen County
1 at 138 kV.
| Substation | Voltage | Owner | Lines | |
|---|---|---|---|---|
| Tilden | 138 kV | STEC | 1 | map |
ERCOT interconnection queue
1 generation project is queued in McMullen County: 1 solar. By stage: 1 with a signed interconnection agreement. No battery storage projects are queued.
From the ERCOT GIS report. Project names, developers, MW and dates are on Pro.
Planned transmission
3 planned grid projects touch McMullen County: 3 new or rebuilt lines, 3 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, BRIGHTSD_U1 $46.09 and VENADO_ALL $44.15.
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: Three Rivers (24.1 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 McMullen 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.