Calhoun County, Texas: power grid and siting data
Calhoun County is in ERCOT's SOUTH load zone. It has 23 mapped substations, owned mostly by AEP Texas, STEC and Formosa Plastics; the highest voltage is 138 kV. The ERCOT queue lists 2 generation projects (2 solar) and 2 battery storage projects here.
Substations in Calhoun County
18 at 138 kV, 5 at 69 kV and below.
| Substation | Voltage | Owner | Lines | |
|---|---|---|---|---|
| Joslin | 138 kV | AEP Texas | 6 | map |
| Formosa | 138 kV | AEP Texas | 5 | map |
| Union Carbide | 138 kV | AEP Texas | 5 | map |
| Formosa Plastics Switching Station | 138 kV | Formosa Plastics | 4 | map |
| Port Lavaca | 138 kV | AEP Texas | 4 | map |
| Vistron | 138 kV | Ineos Nitriles Usa Llc | 4 | map |
| Brookhollow | 138 kV | AEP Texas | 3 | map |
| Formosa Plastics Cfb | 138 kV | Formosa Plastics | 3 | map |
| Airco | 138 kV | AEP Texas | 3 | map |
| Tap307978 | 138 kV | AEP Texas | 3 | map |
| Point Comfort | 138 kV | AEP Texas | 2 | map |
| Unnamed station | 138 kV | Formosa Plastics Corp Texas | 1 | map |
| Unnamed station | 138 kV | Dow Chemical | 1 | map |
| Greenlake | 138 kV | AEP Texas | 1 | map |
| Alcoa | 138 kV | Alcoa | 1 | map |
| Unnamed station | 138 kV | Formosa Plastics Corp Texas | 1 | map |
| Cobia | 138 kV | AEP Texas | map | |
| Neptune | 138 kV | AEP Texas | map | |
| Seadrift | 69 kV | STEC | 2 | map |
| Unnamed station | 69 kV | Dow Chemical | 2 | map |
| Port Lavaca | 69 kV | STEC | 2 | map |
| Port O'Connor | 69 kV | STEC | 2 | map |
| Olivia | 69 kV | STEC | 1 | map |
ERCOT interconnection queue
2 generation projects are queued in Calhoun County: 2 solar. By stage: 1 with a signed interconnection agreement and 1 in full interconnection study. 2 battery storage projects are queued, 0 with a signed interconnection agreement.
From the ERCOT GIS report. Project names, developers, MW and dates are on Pro.
Planned transmission
4 planned grid projects touch Calhoun County: 1 new substation and 3 new or rebuilt lines.
Wholesale power prices
The SOUTH load zone averaged $48.57/MWh day-ahead over the last 7 days. Nearest generator pricing nodes: CALHOUN_ALL $56.90, FO_FORMOSA11 $57.14 and VICTPORT_RN $50.68.
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 Calhoun County, 1 at or above ERCOT's 75 MW large load threshold.
- NRC completes safety review for X-energy and Dow Long Mott reactors in Texas World Nuclear News 2026-11-02
- Synergen Green Energy asks PUCT for good-cause entry to Batch Zero for 300 MW Calhoun County ammonia plant PUCT Project 59142 2026-09-11
- Residents organize opposition to proposed data centers in Crossroads Victoria Advocate 2026-06-05
- Crusoe partners with Blue Energy for Port of Victoria AI campus power Crusoe
Jurisdiction
Nearest city to the county center: Port Lavaca (6.2 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 Calhoun 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.