DIABLO
SubstationWashington · CITY OF SEATTLE - (WA)
DIABLO is an electric transmission substation in Washington, operated by CITY OF SEATTLE - (WA). 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 |
|---|---|---|---|---|
| #72413 | 230 kV | CITY OF SEATTLE - (WA) | — | 87.5 mi |
| #72414 | 230 kV | CITY OF SEATTLE - (WA) | — | 87.5 mi |
| #72415 | 230 kV | CITY OF SEATTLE - (WA) | — | 87.4 mi |
| #72417 | 230 kV | CITY OF SEATTLE - (WA) | — | 5.8 mi |
| #72463 | 230 kV | CITY OF SEATTLE - (WA) | — | 3.8 mi |
| #72464 | 230 kV | CITY OF SEATTLE - (WA) | — | 3.7 mi |
Nearby datacenter candidate sites
Scored candidate sites within roughly 25 miles of DIABLO, 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 |
|---|---|---|---|---|---|---|---|
| GEORGE | Substation-Adjacent | WA | Skagit County | 230 kV | 300 MW | 1.7 yrs | 62.0 |
| DIABLO | Substation-Adjacent | WA | Whatcom County | 230 kV | 300 MW | 1.7 yrs | 58.6 |
| Greenfield (GEORGE - NORTH MOUNTAIN) | Greenfield | WA | Skagit County | 230 kV | 300 MW | 1.7 yrs | 56.7 |
| ROSS | Substation-Adjacent | WA | Whatcom County | 230 kV | 300 MW | 1.7 yrs | 56.3 |
| Greenfield (GEORGE - NORTH MOUNTAIN) | Greenfield | WA | Skagit County | 230 kV | 300 MW | 1.7 yrs | 56.2 |
| Greenfield (GEORGE - NORTH MOUNTAIN) | Greenfield | WA | Skagit County | 230 kV | 300 MW | 1.7 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 DIABLO 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.