LOWER GRANITE
SubstationWashington · BONNEVILLE POWER ADMINISTRATION
LOWER GRANITE is an electric transmission substation in Washington, operated by BONNEVILLE POWER ADMINISTRATION. It is classified as extra-high-voltage (500 kv) and connects 4 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
Ownership & operation
Connected transmission lines
Lines terminating at or passing through this substation, by HIFLD line ID, highest voltage first.
| Line ID | Voltage | Owner | Status | Length |
|---|---|---|---|---|
| #67229 | 500 kV | BONNEVILLE POWER ADMINISTRATION | IN SERVICE | 20.0 mi |
| #67230 | 500 kV | BONNEVILLE POWER ADMINISTRATION | IN SERVICE | 20.1 mi |
| #67231 | 500 kV | BONNEVILLE POWER ADMINISTRATION | IN SERVICE | 32.9 mi |
| #73185 | 500 kV | BONNEVILLE POWER ADMINISTRATION | IN SERVICE | 0.8 mi |
Nearby datacenter candidate sites
Scored candidate sites within roughly 25 miles of LOWER GRANITE, 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 |
|---|---|---|---|---|---|---|---|
| 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 |
| Greenfield (LOWER GRANITE - HATWAI) | Greenfield | WA | Garfield County | 500 kV | 1,000 MW | 1.7 yrs | 65.9 |
| UNKNOWN206078 | Substation-Adjacent | WA | Whitman County | 115 kV | 100 MW | 1.7 yrs | 65.7 |
| 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 |
| CENTRAL FERRY | Substation-Adjacent | WA | Garfield County | 500 kV | 1,000 MW | 1.7 yrs | 65.3 |
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 LOWER GRANITE 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.