Starr County, Texas: power grid and siting data
Starr County is in ERCOT's SOUTH load zone. It has 20 mapped substations, owned mostly by AEP Texas, Duke Energy and Efs Family Ltd; the highest voltage is 345 kV. The ERCOT queue lists 12 generation projects (8 solar and 4 wind) and 9 battery storage projects here.
Substations in Starr County
7 at 345 kV, 11 at 138 kV, 2 at 69 kV and below.
| Substation | Voltage | Owner | Lines | |
|---|---|---|---|---|
| Del Sol | 345 kV | AEP Texas | 4 | map |
| Mighoward | 345 kV | Duke Energy | 1 | map |
| Jackie Howard | 345 kV | Duke Energy | 1 | map |
| Cabezon | 345 kV | AEP Texas | map | |
| Mesteno | 345 kV | AEP Texas | map | |
| Pronto | 345 kV | AEP Texas | map | |
| Equinox Poi | 345 kV | AEP Texas | map | |
| Garza | 138 kV | AEP Texas | 5 | map |
| Falcon Switching Station | 138 kV | AEP Texas | 4 | map |
| Rio Grande City | 138 kV | AEP Texas | 3 | map |
| Falcon Power Plant | 138 kV | not recorded | 3 | map |
| Liston | 138 kV | AEP Texas | 3 | map |
| Roma Switching Station | 138 kV | AEP Texas | 3 | map |
| Roma | 138 kV | AEP Texas | 2 | map |
| Lkhoward | 138 kV | Duke Energy | 2 | map |
| La Grulla | 138 kV | AEP Texas | 1 | map |
| Garceno | 138 kV | AEP Texas | map | |
| Las Lomas | 138 kV | AEP Texas | map | |
| Unnamed station | 69 kV | Efs Family Ltd | 1 | map |
| Rio Grande City | 69 kV | STEC | 1 | map |
ERCOT interconnection queue
12 generation projects are queued in Starr County: 8 solar and 4 wind. By stage: 7 with a signed interconnection agreement and 5 in full interconnection study. 9 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
8 planned grid projects touch Starr County: 2 new substations, 3 new or rebuilt lines and 3 substation upgrades, 8 at 345 kV or above; 2 already energized.
Wholesale power prices
The SOUTH load zone averaged $48.57/MWh day-ahead over the last 7 days. Nearest generator pricing nodes: MESTENO_RN $44.47, CONTINEN_RN $44.66 and RIOG_ESR_RN $44.66.
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: Rio Grande City (12.5 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 Starr 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.