JOHNSON
SubstationTexas · ONCOR ELECTRIC DELIVERY CO.
JOHNSON is an electric transmission substation in Texas, operated by ONCOR ELECTRIC DELIVERY CO.. It is classified as high-voltage (345 kv) and connects 5 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
Connected transmission lines
Lines terminating at or passing through this substation, by HIFLD line ID, highest voltage first.
| Line ID | Voltage | Owner | Status | Length |
|---|---|---|---|---|
| #86094 | 345 kV | ONCOR ELECTRIC DELIVERY CO. | IN SERVICE | 25.1 mi |
| #87580 | 345 kV | ONCOR ELECTRIC DELIVERY CO. | IN SERVICE | 22.0 mi |
| #92471 | 345 kV | ONCOR ELECTRIC DELIVERY CO. | IN SERVICE | 0.3 mi |
| #13214 | 161 kV | — | IN SERVICE | 5.9 mi |
| #17937 | 161 kV | — | IN SERVICE | 0.3 mi |
Nearby datacenter candidate sites
Scored candidate sites within roughly 25 miles of JOHNSON, 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 |
|---|---|---|---|---|---|---|---|
| ANNA | Substation-Adjacent | TX | Collin County | 345 kV | 600 MW | 3.4 yrs | 70.8 |
| CLEVELAND | Substation-Adjacent | OK | Bryan County | 345 kV | 600 MW | 3.4 yrs | 70.4 |
| UNKNOWN301314 | Substation-Adjacent | TX | Fannin County | 345 kV | 600 MW | 3.4 yrs | 70.2 |
| UNKNOWN309018 | Substation-Adjacent | TX | Grayson County | 230 kV | 300 MW | 3.4 yrs | 68.5 |
| UNKNOWN302406 | Substation-Adjacent | TX | Fannin County | 345 kV | 600 MW | 3.4 yrs | 68.2 |
| UNKNOWN300039 | Substation-Adjacent | TX | Collin County | 138 kV | 100 MW | 3.4 yrs | 67.7 |
| JOHNSON | Substation-Adjacent | TX | Fannin County | 345 kV | 600 MW | 3.4 yrs | 67.5 |
| UNKNOWN303249 | Substation-Adjacent | TX | Fannin County | 345 kV | 600 MW | 3.4 yrs | 67.3 |
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 JOHNSON 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.