San Patricio County, Texas: power grid and siting data
San Patricio County is in ERCOT's SOUTH load zone. It has 43 mapped substations, owned mostly by AEP Texas, STEC and Nrg Energy; the highest voltage is 345 kV. The ERCOT queue lists 13 generation projects (9 solar, 2 gas and 2 wind) and 14 battery storage projects here.
Substations in San Patricio County
7 at 345 kV, 27 at 138 kV, 9 at 69 kV and below. The 30 highest-voltage stations are listed; the map shows all 43.
| Substation | Voltage | Owner | Lines | |
|---|---|---|---|---|
| El Algodon Alto Wind Farm | 345 kV | AEP Texas | map | |
| Angstrom | 345 kV | AEP Texas | map | |
| El Algodon Alto Wind Poi | 345 kV | AEP Texas | map | |
| Lucero | 345 kV | AEP Texas | map | |
| Naismith | 345 kV | AEP Texas | map | |
| Steel Dynamics Incorporated (Sdi) | 345 kV | AEP Texas | map | |
| Welder Poi | 345 kV | AEP Texas | map | |
| Whitepoint | 138 kV | AEP Texas | 9 | map |
| Rincon | 138 kV | AEP Texas | 7 | map |
| Dupont Switching Station | 138 kV | AEP Texas | 7 | map |
| Odem | 138 kV | AEP Texas | 2 | map |
| Gregory Switchyard | 138 kV | Nrg Energy | 2 | map |
| Mayo | 138 kV | AEP Texas | 2 | map |
| Ingleside | 138 kV | AEP Texas | 2 | map |
| Sinton | 138 kV | AEP Texas | 2 | map |
| Taft | 138 kV | AEP Texas | 2 | map |
| Aransas Pass | 138 kV | AEP Texas | 2 | map |
| Portland | 138 kV | AEP Texas | 1 | map |
| Papalote Creek Wind Farm | 138 kV | E On | 1 | map |
| Gregory | 138 kV | AEP Texas | 0 | map |
| Dupont Pp1 | 138 kV | Chemours | 0 | map |
| Ingleside Cogeneration Switchyard | 138 kV | Chemours Occidental Petroleum | 0 | map |
| Gulf Coast Growth Venture 138kv 4 | 138 kV | AEP Texas | map | |
| Haisley | 138 kV | AEP Texas | map | |
| Hecker | 138 kV | AEP Texas | map | |
| Homeport (Ins Ingleside) | 138 kV | AEP Texas | map | |
| Hot Iron | 138 kV | AEP Texas | map | |
| Jackalope Solar | 138 kV | AEP Texas | map | |
| Jackalope Solar Poi | 138 kV | AEP Texas | map | |
| Mccampbell | 138 kV | AEP Texas | map |
ERCOT interconnection queue
13 generation projects are queued in San Patricio County: 9 solar, 2 gas and 2 wind. By stage: 8 with a signed interconnection agreement and 5 in full interconnection study. 14 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
9 planned grid projects touch San Patricio County: 2 new substations, 5 new or rebuilt lines and 2 substation upgrades, 2 at 345 kV or above; 1 already energized.
Wholesale power prices
The SOUTH load zone averaged $48.57/MWh day-ahead over the last 7 days. Nearest generator pricing nodes: PIN_BESS_RN $45.45, CARN_ESS_RN $45.92 and ALGOD_ALL_RN $44.33.
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: Sinton (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 San Patricio 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.