ONTARIO
SubstationOregon · IDAHO POWER CO
ONTARIO is an electric transmission substation in Oregon, operated by IDAHO POWER CO. It is classified as high-voltage (230 kv) and connects 7 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 |
|---|---|---|---|---|
| #75595 | 230 kV | IDAHO POWER CO | — | 20.9 mi |
| #70463 | 230 kV | IDAHO POWER CO | — | 17.4 mi |
| #70503 | 138 kV | IDAHO POWER CO | — | 3.2 mi |
| #70508 | 138 kV | IDAHO POWER CO | — | 12.3 mi |
| #75582 | 115 kV | IDAHO POWER CO | — | 5.5 mi |
| #75583 | 115 kV | IDAHO POWER CO | — | 2.7 mi |
| #75591 | 115 kV | IDAHO POWER CO | — | 2.6 mi |
Nearby datacenter candidate sites
Scored candidate sites within roughly 25 miles of ONTARIO, 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 |
|---|---|---|---|---|---|---|---|
| CALDWELL | Substation-Adjacent | ID | Canyon County | 230 kV | 300 MW | 1.7 yrs | 69.2 |
| LANGLEY GULCH POWER PLANT | Substation-Adjacent | ID | Payette County | 230 kV | 300 MW | 1.7 yrs | 69.0 |
| UNKNOWN202541 | Substation-Adjacent | ID | Canyon County | 230 kV | 300 MW | 1.7 yrs | 67.8 |
| ONTARIO | Substation-Adjacent | ID | Payette County | 230 kV | 300 MW | 1.7 yrs | 67.1 |
| WILIS | Substation-Adjacent | ID | Canyon County | 138 kV | 100 MW | 1.7 yrs | 65.8 |
| TAP207369 | Substation-Adjacent | ID | Gem County | 230 kV | 300 MW | 1.7 yrs | 64.8 |
| PAYETTE | Substation-Adjacent | ID | Payette County | 138 kV | 100 MW | 1.7 yrs | 64.6 |
| Greenfield (BURNS - HEMINGWAY) | Greenfield | ID | Canyon County | 500 kV | 1,000 MW | 1.7 yrs | 64.5 |
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 ONTARIO substation, Oregon. 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.