Watermill Substation, Dallas County, Texas
Watermill Substation is a 345 kV station in Dallas County, Texas, owned by Texas Utilities Elec Co with 13 transmission lines connected. It is classed as a transmission station: load service would need a new transformer or a distribution sub fed from it. 1 queued project names it as its point of interconnection.
Station facts
| Owner | Texas Utilities Elec Co |
| Voltage | 345 kV |
| Status | In Service |
| Station class | transmission (high confidence) |
| Likely serving utility nearby | Texas Utilities Elec Co |
| Jurisdiction | Inside an estimated city ETJ; nearest city Lancaster (0.8 mi) |
| Coordinates | 32.5585, -96.7262 |
Interconnection queue at Watermill Substation
1 generation project name this station as point of interconnection: 1 other. No battery storage projects name it.
From the ERCOT GIS report. Developers, MW and dates are on Pro.
Nearby substations
| Substation | Voltage | Owner | Distance |
|---|---|---|---|
| Wilmer | 138 kV | Texas Utilities Elec Co | 2.85 mi |
| Lancaster | 138 kV | Texas Utilities Elec Co | 3.74 mi |
| Southside Tap | 138 kV | Texas Utilities Elec Co | 3.77 mi |
| Unnamed station | 138 kV | Brazos Elec Power Coop | 4.51 mi |
| Unnamed station | 138 kV | Oncor | 4.93 mi |
| Hutchins | 138 kV | Texas Utilities Elec Co | 5.1 mi |
| Tap310669 | 138 kV | Texas Utilities Elec Co | 5.99 mi |
Wholesale prices nearby
The NORTH load zone averaged $39.98/MWh day-ahead over the last 7 days. Nearest generator pricing nodes: ANOL_ESS_RN $31.32, MISAE_GEN_RN $35.55 and MESQUITE_RN $46.52.
See Watermill 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.