SAPPHO
SubstationWashington · BONNEVILLE POWER ADMINISTRATION
SAPPHO is an electric transmission substation in Washington, operated by BONNEVILLE POWER ADMINISTRATION. It is classified as sub-transmission (115 kv) and connects 1 transmission line. 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 |
|---|---|---|---|---|
| #68019 | 115 kV | BONNEVILLE POWER ADMINISTRATION | — | 24.6 mi |
Nearby datacenter candidate sites
Scored candidate sites within roughly 25 miles of SAPPHO, 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 |
|---|---|---|---|---|---|---|---|
| SAPPHO | Substation-Adjacent | WA | Clallam County | 115 kV | 100 MW | 1.7 yrs | 56.6 |
| UNKNOWN207127 | Substation-Adjacent | WA | Clallam County | 115 kV | 100 MW | 1.7 yrs | 51.9 |
| Greenfield (TAP203447 - SAPPHO) | Greenfield | WA | Clallam County | 115 kV | 100 MW | 1.7 yrs | 50.3 |
| OZ Clallam | Greenfield | WA | Clallam | — | — | 1.7 yrs | 48.8 |
| OZ Clallam | Greenfield | WA | Clallam | — | — | 1.7 yrs | 48.6 |
| Greenfield (TAP203447 - SAPPHO) | Greenfield | WA | Clallam County | 115 kV | 100 MW | 1.7 yrs | 48.4 |
| Greenfield (TAP203447 - SAPPHO) | Greenfield | WA | Clallam County | 115 kV | 100 MW | 1.7 yrs | 47.0 |
| Mine Site | Former Mine | WA | Clallam County | — | — | — | 35.7 |
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 SAPPHO 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.