SPAR CANYON
SubstationIdaho · BONNEVILLE POWER ADMINISTRATION
SPAR CANYON is an electric transmission substation in Idaho, operated by BONNEVILLE POWER ADMINISTRATION. It is classified as high-voltage (230 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 |
|---|---|---|---|---|
| #68304 | 230 kV | BONNEVILLE POWER ADMINISTRATION | — | 53.2 mi |
| #69537 | 230 kV | BONNEVILLE POWER ADMINISTRATION | — | 53.2 mi |
| #70261 | 230 kV | BONNEVILLE POWER ADMINISTRATION | — | 23.6 mi |
Nearby datacenter candidate sites
Scored candidate sites within roughly 25 miles of SPAR CANYON, 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 |
|---|---|---|---|---|---|---|---|
| ROUND VALLEY | Substation-Adjacent | ID | Custer County | 230 kV | 300 MW | 1.1 yrs | 68.0 |
| SPAR CANYON | Substation-Adjacent | ID | Custer County | 230 kV | 300 MW | 2.0 yrs | 63.7 |
| Greenfield (SPAR CANYON - ROUND VALLEY) | Greenfield | ID | Custer County | 230 kV | 300 MW | 1.1 yrs | 62.2 |
| Greenfield (LOST RIVER - SPAR CANYON) | Greenfield | ID | Custer County | 230 kV | 300 MW | 2.0 yrs | 58.0 |
| Greenfield (TAP207694 - TAP207695) | Greenfield | ID | Custer County | 115 kV | 100 MW | 1.1 yrs | 58.0 |
| Greenfield (LOST RIVER - SPAR CANYON) | Greenfield | ID | Custer County | 230 kV | 300 MW | 2.0 yrs | 57.9 |
| Greenfield (TAP207694 - TAP207695) | Greenfield | ID | Custer County | 115 kV | 100 MW | 1.1 yrs | 57.9 |
| Greenfield (TAP207694 - TAP207695) | Greenfield | ID | Custer County | 115 kV | 100 MW | 1.1 yrs | 57.5 |
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 SPAR CANYON 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.