Cameron County, Texas: power grid and siting data
Cameron County is in ERCOT's SOUTH load zone. It has 63 mapped substations, owned mostly by AEP Texas, Brownsville Public Utilities Board and STEC; the highest voltage is 345 kV. The ERCOT queue lists 8 generation projects (5 solar, 1 gas, 1 hydro and 1 wind) and 21 battery storage projects here.
Substations in Cameron County
5 at 345 kV, 55 at 138 kV, 3 at 69 kV and below. The 30 highest-voltage stations are listed; the map shows all 63.
| Substation | Voltage | Owner | Lines | |
|---|---|---|---|---|
| Rio Hondo | 345 kV | AEP Texas | 8 | map |
| La Palma 345 kV | 345 kV | AEP Texas | 2 | map |
| Arroyo Poi | 345 kV | AEP Texas | map | |
| East Raymond Poi | 345 kV | AEP Texas | map | |
| Gulch | 345 kV | AEP Texas | map | |
| La Palma 138 kV | 138 kV | AEP Texas | 8 | map |
| Military Highway | 138 kV | Brownsville Public Utilities Board | 6 | map |
| Sila Ray | 138 kV | Brownsville Public Utilities Board | 5 | map |
| La Palma 69 kV | 138 kV | AEP Texas | 5 | map |
| Harlingen Switching | 138 kV | AEP Texas | 5 | map |
| Oleander | 138 kV | AEP Texas | 4 | map |
| Union Carbide | 138 kV | AEP Texas | 4 | map |
| Brownsville Switching Station | 138 kV | AEP Texas | 3 | map |
| Causeway | 138 kV | AEP Texas | 3 | map |
| Tap302498 | 138 kV | not recorded | 3 | map |
| South Santa Rosa | 138 kV | AEP Texas | 3 | map |
| Port Isabel | 138 kV | AEP Texas | 3 | map |
| Airport | 138 kV | Brownsville Public Utilities Board | 3 | map |
| Price Road | 138 kV | Brownsville Public Utilities Board | 3 | map |
| Tap308039 | 138 kV | AEP Texas | 3 | map |
| Tap308065 | 138 kV | not recorded | 3 | map |
| Midtown | 138 kV | Brownsville Public Utilities Board | 3 | map |
| Tap310732 | 138 kV | not recorded | 3 | map |
| Highway 511 | 138 kV | STEC | 2 | map |
| 6th Street | 138 kV | Brownsville Public Utilities Board | 2 | map |
| Loma Alta | 138 kV | Brownsville Public Utilities Board | 2 | map |
| Coffee Port | 138 kV | AEP Texas | 2 | map |
| Sunchase | 138 kV | AEP Texas | 2 | map |
| Paredes Switching Station | 138 kV | STEC | 2 | map |
| Haine Drive | 138 kV | AEP Texas | 2 | map |
ERCOT interconnection queue
8 generation projects are queued in Cameron County: 5 solar, 1 gas, 1 hydro and 1 wind. By stage: 1 with a signed interconnection agreement and 7 in full interconnection study. 21 battery storage projects are queued, 6 with a signed interconnection agreement.
From the ERCOT GIS report. Project names, developers, MW and dates are on Pro.
Planned transmission
25 planned grid projects touch Cameron County: 11 new substations, 13 new or rebuilt lines and 1 substation upgrade, 6 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: LAUR_BESS_RN $46.41, L_FRE_ESR_RN $46.74 and CAMWIND_RN $47.10.
ERCOT day-ahead settlement point prices. Hourly history, battery spreads and real-time prices are on the map.
Data centers and large loads
5 announced data center campuses in Cameron County, 5 at or above ERCOT's 75 MW large load threshold.
- City of Brownsville Special Commission Meeting, October 7, 2026 Govly (meeting record) 2026-10-07
- Fluidstack breaks ground on $4 billion data center project in Cameron County KRGV 2026-09-11
- WORKSITE PERMIT ISSUED FOR FLUIDSTACK DATA CENTER PROJECT Cameron County 2026-09-10
- Harlingen hits pause on $27M offer from Fluidstack data center RGV Business Journal 2026-09-03
- Harlingen WaterWorks reclaimed-water deal for proposed Eneus data center MyRGV 2026-06-23
Jurisdiction
Nearest city to the county center: Brownsville (0.4 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 Cameron 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.