CUSTER
SubstationWashington
At a glance
CUSTER is an electric transmission substation in Washington. It is classified as unclassified and connects 0 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
No owner is recorded for the lines that connect here.
Nearby datacenter candidate sites
Scored candidate sites within roughly 25 miles of CUSTER, 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 |
|---|---|---|---|---|---|---|---|
| MAPLE VALLEY | Substation-Adjacent | WA | King County | 500 kV | 1,000 MW | 3.5 yrs | 68.4 |
| OBRIEN | Substation-Adjacent | WA | King County | 230 kV | 300 MW | 3.5 yrs | 65.2 |
| OZ King | Greenfield | WA | King | — | — | 3.5 yrs | 64.6 |
| CRESTON NELSON | Substation-Adjacent | WA | Kitsap County | 230 kV | 300 MW | 3.5 yrs | 64.1 |
| OZ King | Greenfield | WA | King | — | — | 3.5 yrs | 64.1 |
| DUWAMISH | Substation-Adjacent | WA | Kitsap County | 230 kV | 300 MW | 3.5 yrs | 64.0 |
| UNKNOWN202929 | Substation-Adjacent | WA | Kitsap County | 230 kV | 300 MW | 3.5 yrs | 63.9 |
| SOUTH | Substation-Adjacent | WA | Kitsap County | 230 kV | 300 MW | 3.5 yrs | 63.9 |
How do candidate sites near CUSTER score?
The 8 highest-scoring candidate sites within about 25 miles range from 64 to 68 on the 0–100 DC Readiness scale. They fall in King County, King, Kitsap County. The Washington average across 6,019 scored sites is 51.7. 1,343 of those Washington sites are classed as substation sites (candidate locations generated at an existing substation).
Frequently asked questions
How many transmission lines connect to CUSTER substation?
0 transmission lines terminate at or pass through CUSTER in the HIFLD line data.
Where is CUSTER substation located?
CUSTER is in Washington at 47.1811, -122.5494. The datacenter candidate sites closest to it are in King County, King, Kitsap County.
Are there datacenter candidate sites near CUSTER substation?
GridCensus lists at least 8 scored candidate sites within roughly 25 miles of CUSTER. The highest-scoring is MAPLE VALLEY at 68/100. Across Washington, the average DC Readiness score is 51.7.
More in Washington
About this data
Source: HIFLD Electric Substations and Transmission Lines (U.S. Department of Homeland Security), as published June 29, 2026. See the methodology for how records are matched, cleaned and scored.
Cite as: GridCensus, “CUSTER substation, Washington”, https://gridcensus.com/substations/washington/custer-35c6d10a (data as of June 29, 2026).
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
Every site and score for CUSTER substation, Washington is free to browse. Pro adds Watchtower on 25 sites, alerts when new candidate sites, datacenters or interconnection-queue requests appear in your markets, score and capacity history, and CSV export. Enterprise adds team seats, weekly data files for all 147,272 sites, the REST API and an MCP server for AI tools.