Robertson County, Texas: power grid and siting data
Robertson County is in ERCOT's NORTH load zone. It has 16 mapped substations, owned mostly by Brazos, Entergy (non-ERCOT) and Oncor; the highest voltage is 345 kV. The ERCOT queue lists 4 generation projects (4 solar) and 16 battery storage projects here.
Substations in Robertson County
2 at 345 kV, 10 at 138 kV, 4 at 69 kV and below.
| Substation | Voltage | Owner | Lines | |
|---|---|---|---|---|
| Twin Oak | 345 kV | Oncor | 8 | map |
| Petteway | 345 kV | Brazos | 2 | map |
| Hearne | 138 kV | Brazos | 4 | map |
| Hearne | 138 kV | Entergy (non-ERCOT) | 3 | map |
| Robertson | 138 kV | Brazos | 3 | map |
| Tap310925 | 138 kV | Uw Brazos Valley Farm Llc | 3 | map |
| Hearne Southwest | 138 kV | Brazos | 2 | map |
| Elliot | 138 kV | Brazos | 2 | map |
| Calvert | 138 kV | Entergy (non-ERCOT) | 1 | map |
| Franklin | 138 kV | Brazos | 1 | map |
| Phillips Coal | 138 kV | Brazos | 1 | map |
| Unnamed station | 138 kV | Brazos | 1 | map |
| Tnp One | 69 kV | Major Oak Power Llc | 4 | map |
| Tap305339 | 69 kV | Box Robert L | 3 | map |
| Oak Grove | 69 kV | Luminant Mining Company Llc | 2 | map |
| Humble Hearne | 69 kV | Entergy (non-ERCOT) | 0 | map |
ERCOT interconnection queue
4 generation projects are queued in Robertson County: 4 solar. By stage: 2 with a signed interconnection agreement, 1 in full interconnection study and 1 done with the full study. 16 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
8 planned grid projects touch Robertson County: 5 new substations and 3 new or rebuilt lines, 7 at 345 kV or above.
Wholesale power prices
The NORTH load zone averaged $39.98/MWh day-ahead over the last 7 days. Nearest generator pricing nodes: TDWLPR_1_RN $36.83, LEG_LEG_G1 $38.01 and RPUBRDS_RN $41.30.
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: Franklin (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 Robertson County 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.