GRAND COULEE NUMBER ONE
SubstationWashington
At a glance
GRAND COULEE NUMBER ONE 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 GRAND COULEE NUMBER ONE, 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 |
|---|---|---|---|---|---|---|---|
| GRAND COULEE 230KV | Substation-Adjacent | WA | Douglas County | 500 kV | 1,000 MW | 3.5 yrs | 63.8 |
| GRAND COULEE 500KV | Substation-Adjacent | WA | Douglas County | 500 kV | 1,000 MW | 3.5 yrs | 63.7 |
| SAINT ANDREWS | Substation-Adjacent | WA | Douglas County | 230 kV | 300 MW | 3.5 yrs | 60.4 |
| TAP206319 | Substation-Adjacent | WA | Douglas County | 138 kV | 100 MW | 3.5 yrs | 57.7 |
| COULEE CITY | Substation-Adjacent | WA | Douglas County | 138 kV | 100 MW | 3.5 yrs | 57.6 |
| GRAND COULEE | Substation-Adjacent | WA | Douglas County | 115 kV | 100 MW | 3.5 yrs | 55.2 |
| TAP206249 | Substation-Adjacent | WA | Lincoln County | 115 kV | 100 MW | 3.5 yrs | 54.8 |
| UNKNOWN202923 | Substation-Adjacent | WA | Lincoln County | 115 kV | 100 MW | 3.5 yrs | 54.8 |
How do candidate sites near GRAND COULEE NUMBER ONE score?
The 8 highest-scoring candidate sites within about 25 miles range from 55 to 64 on the 0–100 DC Readiness scale. They fall in Douglas County, Lincoln 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 GRAND COULEE NUMBER ONE substation?
0 transmission lines terminate at or pass through GRAND COULEE NUMBER ONE in the HIFLD line data.
Where is GRAND COULEE NUMBER ONE substation located?
GRAND COULEE NUMBER ONE is in Washington at 47.9511, -119.0011. The datacenter candidate sites closest to it are in Douglas County, Lincoln County.
Are there datacenter candidate sites near GRAND COULEE NUMBER ONE substation?
GridCensus lists at least 8 scored candidate sites within roughly 25 miles of GRAND COULEE NUMBER ONE. The highest-scoring is GRAND COULEE 230KV at 64/100. 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, “GRAND COULEE NUMBER ONE substation, Washington”, https://gridcensus.com/substations/washington/grand-coulee-number-one-98430127 (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 GRAND COULEE NUMBER ONE 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.