Tonkawa Substation, Scurry County, Texas
Tonkawa Substation is a 345 kV station in Scurry County, Texas, owned by Oncor with 10 transmission lines connected. It is classed as a transmission station: load service would need a new transformer or a distribution sub fed from it. 9 queued projects name it as their point of interconnection.
Station facts
| Owner | Oncor |
| Voltage | 345 kV |
| Status | In Service |
| Station class | transmission (high confidence) |
| Likely serving utility nearby | E On |
| Jurisdiction | Outside city limits; nearest city Loraine (7.9 mi) |
| Coordinates | 32.5307, -100.6842 |
Interconnection queue at Tonkawa Substation
7 generation projects name this station as point of interconnection: 1 gas, 3 solar and 3 wind. 2 battery storage projects, 1 with a signed interconnection agreement.
From the ERCOT GIS report. Developers, MW and dates are on Pro.
Nearby substations
| Substation | Voltage | Owner | Distance |
|---|---|---|---|
| Pyron Wind Farm | 345 kV | E On | 3.41 mi |
| Roscoe Wind Farm | 345 kV | E On | 4.32 mi |
| Inadale Wind Farm | 345 kV | E On | 5.59 mi |
| Loraine Wind Farm | 345 kV | Third Planet Windpower | 6.92 mi |
| Unnamed station | 138 kV | Et S Permian Pipeline Co Llc | 8.57 mi |
| Colorado Basin | 345 kV | Oncor | 8.88 mi |
| Champion Wind Farm | 345 kV | E On | 9.34 mi |
Wholesale prices nearby
The WEST load zone averaged $57.31/MWh day-ahead over the last 7 days. Nearest generator pricing nodes: SWT_BESS_RN $85.38, CROSSTRL_RN $66.35 and LONEWOLF_ALL $56.52.
See Tonkawa Substation on the map
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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.