Hidalgo County, Texas: power grid and siting data
Hidalgo County is in ERCOT's SOUTH load zone. It has 72 mapped substations, owned mostly by AEP Texas, STEC and Sharyland; the highest voltage is 345 kV. The ERCOT queue lists 5 generation projects (3 solar, 1 gas and 1 wind) and 20 battery storage projects here.
Substations in Hidalgo County
7 at 345 kV, 64 at 138 kV, 1 at 115 kV. The 30 highest-voltage stations are listed; the map shows all 72.
| Substation | Voltage | Owner | Lines | |
|---|---|---|---|---|
| North Edinburg | 345 kV | AEP Texas | 10 | map |
| Los Mirasoles | 345 kV | AEP Texas | 3 | map |
| Pomelo | 345 kV | Edp | 2 | map |
| Brisita Poi | 345 kV | AEP Texas | map | |
| Brisita | 345 kV | AEP Texas | map | |
| Lambo Collector Station Poi | 345 kV | AEP Texas | map | |
| Mantle | 345 kV | AEP Texas | map | |
| Weslaco | 138 kV | AEP Texas | 6 | map |
| South Mcallen | 138 kV | AEP Texas | 6 | map |
| Frontera | 138 kV | AEP Texas | 6 | map |
| Stewart Road | 138 kV | AEP Texas | 4 | map |
| West Edinburg | 138 kV | STEC | 4 | map |
| Pharr | 138 kV | STEC | 4 | map |
| North Mcallen | 138 kV | AEP Texas | 4 | map |
| Pharr | 138 kV | AEP Texas | 3 | map |
| Duke | 138 kV | AEP Texas | 3 | map |
| Palmhurst | 138 kV | AEP Texas | 3 | map |
| Unnamed station | 138 kV | Fe Ma Enterprises Inc | 3 | map |
| Key Switching Station | 138 kV | AEP Texas | 3 | map |
| Mayberry | 138 kV | AEP Texas | 3 | map |
| EnergíA Buena Vista | 138 kV | Frontera Generation Ltd Prtnrshp | 3 | map |
| Sioux | 138 kV | STEC | 3 | map |
| Alberta | 138 kV | STEC | 3 | map |
| Bates | 138 kV | AEP Texas | 3 | map |
| North Alamo | 138 kV | AEP Texas | 2 | map |
| Hi Line | 138 kV | STEC | 2 | map |
| Rio Rico | 138 kV | AEP Texas | 2 | map |
| Sharyland | 138 kV | AEP Texas | 2 | map |
| Railroad Dc Tie | 138 kV | Sharyland | 2 | map |
| Las Milpas | 138 kV | STEC | 2 | map |
ERCOT interconnection queue
5 generation projects are queued in Hidalgo County: 3 solar, 1 gas and 1 wind. By stage: 1 with a signed interconnection agreement and 4 in full interconnection study. 20 battery storage projects are queued, 4 with a signed interconnection agreement.
From the ERCOT GIS report. Project names, developers, MW and dates are on Pro.
Planned transmission
16 planned grid projects touch Hidalgo County: 3 new substations, 9 new or rebuilt lines and 4 substation upgrades, 10 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: NED_NEDIN_G1 $43.88, REDGATE_RN $43.86 and GUNR_RN $46.18.
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 Hidalgo County.
- 410,000 Megawatts in Four Years: ERCOT Tells the Legislature the Queue Just Broke Reality The Grid Report 2026-04-17
- "Inflection Point": 226 GW in the Queue, a 7.65 GW Permit, and the Week Texas Energy Got Real The Grid Report 2026-03-06
- 1547 Announces McAllen Internet Exchange (MCT-IX) Alongside Ecosystem Growth and Data Center Expansions 1547 Critical Systems Realty 2025-12-16
Jurisdiction
Nearest city to the county center: Edinburg (1.6 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 Hidalgo 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.