Marion County, Texas: power grid and siting data
SWEPCO (AEP, non-ERCOT) owns most of the substations near the county center. It has 7 mapped substations, owned mostly by SWEPCO (AEP, non-ERCOT), Upshur Rural Electric Coop and Haggard Tom; the highest voltage is 345 kV. The ERCOT queue lists 0 generation projects and 0 battery storage projects here.
Substations in Marion County
3 at 345 kV, 3 at 138 kV, 1 at 69 kV and below.
| Substation | Voltage | Owner | Lines | |
|---|---|---|---|---|
| Unnamed station | 345 kV | SWEPCO (AEP, non-ERCOT) | 9 | map |
| Jefferson Switching Station | 345 kV | not recorded | 6 | map |
| Unnamed station | 345 kV | SWEPCO (AEP, non-ERCOT) | 3 | map |
| Unnamed station | 138 kV | Upshur Rural Electric Coop | 5 | map |
| Tap310674 | 138 kV | not recorded | 3 | map |
| Unnamed station | 138 kV | Haggard Tom | 2 | map |
| Unnamed station | 69 kV | Solis Berlinda Jane Etvir Andrew J | 1 | map |
ERCOT interconnection queue
No generation projects are queued in Marion County. No battery storage projects are queued.
From the ERCOT GIS report. Project names, developers, MW and dates are on Pro.
Planned transmission
No planned substations, lines or upgrades are recorded in Marion County.
Wholesale power prices
No price data.
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: Jefferson (0.9 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 Marion 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.