SOUTH MCALLEN
SubstationTexas · AEP
SOUTH MCALLEN is an electric transmission substation in Texas, operated by AEP. It is classified as sub-transmission (138 kv) and connects 6 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 |
|---|---|---|---|---|
| #79860 | 138 kV | AEP TEXAS | IN SERVICE | 5.6 mi |
| #82466 | 138 kV | AEP TEXAS | IN SERVICE | 3.4 mi |
| #82766 | 138 kV | AEP TEXAS CENTRAL CO. | IN SERVICE | 2.6 mi |
| #83030 | 138 kV | AEP | IN SERVICE | 3.3 mi |
| #85811 | 138 kV | AEP TEXAS CENTRAL CO. | — | 3.3 mi |
| #90006 | 138 kV | AEP TEXAS CENTRAL CO. | — | 3.7 mi |
Nearby datacenter candidate sites
Scored candidate sites within roughly 25 miles of SOUTH MCALLEN, 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 |
|---|---|---|---|---|---|---|---|
| NORTH EDINBURG | Substation-Adjacent | TX | Hidalgo County | 345 kV | 600 MW | 3.4 yrs | 73.5 |
| POMELO | Substation-Adjacent | TX | Hidalgo County | 345 kV | 600 MW | 3.4 yrs | 70.7 |
| UNKNOWN309640 | Substation-Adjacent | TX | Hidalgo County | 138 kV | 100 MW | 3.4 yrs | 69.9 |
| SOUIX | Substation-Adjacent | TX | Hidalgo County | 138 kV | 100 MW | 3.4 yrs | 69.7 |
| UNKNOWN301271 | Substation-Adjacent | TX | Hidalgo County | 138 kV | 100 MW | 3.4 yrs | 69.7 |
| WEST MCALLEN | Substation-Adjacent | TX | Hidalgo County | 138 kV | 100 MW | 3.4 yrs | 69.7 |
| UNKNOWN304555 | Substation-Adjacent | TX | Hidalgo County | 138 kV | 100 MW | 3.4 yrs | 69.5 |
| UNKNOWN309194 | Substation-Adjacent | TX | Hidalgo County | 138 kV | 100 MW | 3.4 yrs | 69.4 |
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 SOUTH MCALLEN 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.