MAYFIELD
SubstationWashington
MAYFIELD is an electric transmission substation in Washington. It is classified as high-voltage (230 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
Operator not catalogued for this substation.
Nearby datacenter candidate sites
Scored candidate sites within roughly 25 miles of MAYFIELD, 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 |
|---|---|---|---|---|---|---|---|
| UNKNOWN201455 | Substation-Adjacent | WA | Thurston County | 500 kV | 1,000 MW | 6.9 yrs | 62.9 |
| EC Near Transalta Centralia Generation | Greenfield | WA | Lewis | — | — | 1.7 yrs | 61.8 |
| EC Near Transalta Centralia Generation | Greenfield | WA | Lewis | — | — | 1.7 yrs | 61.1 |
| EC Coal Lewis County | Greenfield | WA | Lewis County | — | — | 1.7 yrs | 60.3 |
| EC Coal Thurston County | Greenfield | WA | Thurston County | — | — | 1.7 yrs | 60.0 |
| NAPAVINE | Substation-Adjacent | WA | Thurston County | 500 kV | 1,000 MW | 6.9 yrs | 59.4 |
| EC Near Transalta Centralia Generation | Greenfield | WA | Lewis | — | — | 1.7 yrs | 59.1 |
| EC Coal Lewis County | Greenfield | WA | Lewis County | — | — | 1.7 yrs | 58.9 |
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 MAYFIELD 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.