DRY GULCH
SubstationWashington · AVISTA CORP
DRY GULCH is an electric transmission substation in Washington, operated by AVISTA CORP. It is classified as high-voltage (230 kv) and connects 6 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 |
|---|---|---|---|---|
| #70479 | 230 kV | AVISTA CORP | — | 7.8 mi |
| #70480 | 230 kV | AVISTA CORP | — | 11.3 mi |
| #72483 | 230 kV | AVISTA CORP | — | 30.0 mi |
| #75516 | 115 kV | AVISTA CORP | — | 3.9 mi |
| #75517 | 115 kV | AVISTA CORP | — | 3.3 mi |
| #75518 | 115 kV | AVISTA CORP | — | 1.7 mi |
Nearby datacenter candidate sites
Scored candidate sites within roughly 25 miles of DRY GULCH, 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 |
|---|---|---|---|---|---|---|---|
| HATWAI | Substation-Adjacent | ID | Nez Perce County | 500 kV | 1,000 MW | 1.7 yrs | 67.7 |
| DRY GULCH | Substation-Adjacent | WA | Asotin County | 230 kV | 300 MW | 1.7 yrs | 66.7 |
| UNKNOWN205662 | Substation-Adjacent | ID | Latah County | 115 kV | 100 MW | 1.7 yrs | 66.4 |
| Greenfield (LOWER GRANITE - HATWAI) | Greenfield | ID | Nez Perce County | 500 kV | 1,000 MW | 1.7 yrs | 66.3 |
| MOSCOW | Substation-Adjacent | ID | Latah County | 230 kV | 300 MW | 1.7 yrs | 65.9 |
| Greenfield (LOWER GRANITE - HATWAI) | Greenfield | WA | Garfield County | 500 kV | 1,000 MW | 1.7 yrs | 65.9 |
| ARMSTRONG | Substation-Adjacent | WA | Whitman County | 115 kV | 100 MW | 1.7 yrs | 65.6 |
| NORTH LEWISTON | Substation-Adjacent | ID | Nez Perce County | 230 kV | 300 MW | 1.7 yrs | 65.4 |
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.
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This page shows a public slice of the GridCensus dataset for DRY GULCH substation, Washington. 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.