ELK HORN
SubstationIdaho · IDAHO POWER CO
ELK HORN is an electric transmission substation in Idaho, operated by IDAHO POWER CO. It is classified as sub-transmission (138 kv) and connects 2 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 |
|---|---|---|---|---|
| #70338 | 138 kV | IDAHO POWER CO | — | 10.4 mi |
| #70339 | 138 kV | IDAHO POWER CO | — | 2.0 mi |
Nearby datacenter candidate sites
Scored candidate sites within roughly 25 miles of ELK HORN, 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 |
|---|---|---|---|---|---|---|---|
| HAILEY | Substation-Adjacent | ID | Blaine County | 138 kV | 100 MW | 2.0 yrs | 64.1 |
| WOOD RIVER | Substation-Adjacent | ID | Blaine County | 138 kV | 100 MW | 2.0 yrs | 63.5 |
| MOONSTONE | Substation-Adjacent | ID | Camas County | 138 kV | 100 MW | 2.0 yrs | 59.2 |
| ELK HORN | Substation-Adjacent | ID | Camas County | 138 kV | 100 MW | 2.0 yrs | 57.7 |
| KETCHUM | Substation-Adjacent | ID | Camas County | 138 kV | 100 MW | 2.0 yrs | 57.5 |
| SILVER | Substation-Adjacent | ID | Blaine County | 138 kV | 100 MW | 2.0 yrs | 56.8 |
| Greenfield (HAILEY - SILVER) | Greenfield | ID | Blaine County | 138 kV | 100 MW | 2.0 yrs | 55.8 |
| Greenfield (WOOD RIVER - ELK HORN) | Greenfield | ID | Blaine County | 138 kV | 100 MW | 2.0 yrs | 55.1 |
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 ELK HORN 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.