JEFFERSON
SubstationIdaho · PACIFICORP
JEFFERSON is an electric transmission substation in Idaho, operated by PACIFICORP. It is classified as sub-transmission (138 kv) and connects 3 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 |
|---|---|---|---|---|
| #70101 | 161 kV | PACIFICORP | — | 17.6 mi |
| #70107 | 161 kV | PACIFICORP | — | 29.0 mi |
| #70108 | 115 kV | PACIFICORP | — | 20.9 mi |
Nearby datacenter candidate sites
Scored candidate sites within roughly 25 miles of JEFFERSON, 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 |
|---|---|---|---|---|---|---|---|
| RIGBY | Substation-Adjacent | ID | Madison County | 230 kV | 300 MW | 2.0 yrs | 71.8 |
| AMPS | Substation-Adjacent | ID | Clark County | 230 kV | 300 MW | 1.1 yrs | 70.8 |
| AMMON | Substation-Adjacent | ID | Bonneville County | 161 kV | 100 MW | 2.0 yrs | 69.5 |
| TAP204670 | Substation-Adjacent | ID | Bonneville County | 161 kV | 100 MW | 2.0 yrs | 68.6 |
| WASHINGTON | Substation-Adjacent | ID | Bonneville County | 161 kV | 100 MW | 2.0 yrs | 68.3 |
| JOLLY HILL | Substation-Adjacent | ID | Bonneville County | 161 kV | 100 MW | 2.0 yrs | 67.5 |
| JEFFERSON | Substation-Adjacent | ID | Jefferson County | 161 kV | 100 MW | 2.0 yrs | 66.6 |
| TAP204671 | Substation-Adjacent | ID | Bonneville County | 161 kV | 100 MW | 2.0 yrs | 66.3 |
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 JEFFERSON substation, Idaho. 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.