BIG HILL
SubstationTexas · AEP TEXAS NORTH COMPANY
BIG HILL is an electric transmission substation in Texas, operated by AEP TEXAS NORTH COMPANY. It is classified as high-voltage (345 kv) and connects 4 transmission lines. Substation proximity is one of the strongest speed-to-power signals for siting a datacenter — interconnection distance to an energized, high-voltage bus is often the binding constraint on time-to-energization.
Voltage & classification
Ownership & operation
Connected transmission lines
Lines terminating at or passing through this substation, by HIFLD line ID, highest voltage first.
| Line ID | Voltage | Owner | Status | Length |
|---|---|---|---|---|
| #86629 | 345 kV | PEDERNALES ELECTRIC COOP, INC | IN SERVICE | 34.9 mi |
| #86934 | 345 kV | SOUTHWEST TEXAS ELEC COOP, INC | IN SERVICE | 38.0 mi |
| #89061 | 345 kV | AEP TEXAS NORTH COMPANY | IN SERVICE | 111.3 mi |
| #90424 | 345 kV | PEDERNALES ELECTRIC COOP, INC | IN SERVICE | 34.9 mi |
Nearby datacenter candidate sites
Scored candidate sites within roughly 25 miles of BIG HILL, ranked by DC Readiness. Sites this close to an energized substation carry a strong speed-to-power advantage.
| Site | Type | State | County | Voltage | Capacity | Queue wait | Score |
|---|---|---|---|---|---|---|---|
| BIG HILL | Substation-Adjacent | TX | Schleicher County | 345 kV | 600 MW | 3.4 yrs | 65.3 |
| TAP310570 | Substation-Adjacent | TX | Tom Green County | 138 kV | 100 MW | 3.4 yrs | 64.1 |
| Greenfield (BIG HILL - TWIN BUTTES) | Greenfield | TX | Tom Green County | 345 kV | 600 MW | 3.4 yrs | 63.4 |
| UNKNOWN304202 | Substation-Adjacent | TX | Tom Green County | 138 kV | 100 MW | 3.4 yrs | 63.3 |
| UNKNOWN303418 | Substation-Adjacent | TX | Tom Green County | 138 kV | 100 MW | 3.4 yrs | 62.6 |
| UNKNOWN310285 | Substation-Adjacent | TX | Tom Green County | 138 kV | 100 MW | 3.4 yrs | 62.3 |
| Greenfield (BIG HILL - TWIN BUTTES) | Greenfield | TX | Tom Green County | 345 kV | 600 MW | 3.4 yrs | 61.8 |
| Greenfield (BIG HILL - TWIN BUTTES) | Greenfield | TX | Tom Green County | 345 kV | 600 MW | 3.4 yrs | 60.9 |
Dataset updated . Screening estimates derived from public data sources.
Substation attributes are derived from public HIFLD / EIA infrastructure data and may lag real-world upgrades or retirements. Voltage and connected-line counts are screening figures — confirm available capacity and interconnection terms directly with the operating utility and ISO.
Go deeper than the public screen
This page shows a public slice of the GridCensus dataset for BIG HILL substation, Texas. Pro and Enterprise plans unlock the full 164,098-site catalog, raw sub-scores, parcel ownership, interconnection-queue detail, saved searches, and programmatic API access.