TAP203458
SubstationWashington · OKANOGAN COUNTY ELEC COOP, INC
At a glance
TAP203458 is an electric transmission substation in Washington, on OKANOGAN COUNTY ELEC COOP, INC's transmission network. It is classified as sub-transmission (115 kv) and connects 3 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
Connected transmission lines
Lines terminating at or passing through this substation, by HIFLD line ID, highest voltage first.
| Line ID | Voltage | Owner | Status | Length |
|---|---|---|---|---|
| #201026 | 115 kV | BONNEVILLE POWER ADMINISTRATION | — | 11.4 mi |
| #205964 | 115 kV | OKANOGAN COUNTY ELEC COOP, INC | — | 9.9 mi |
| #205965 | 115 kV | OKANOGAN COUNTY ELEC COOP, INC | — | 0.5 mi |
Nearby datacenter candidate sites
Scored candidate sites within roughly 25 miles of TAP203458, 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 |
|---|---|---|---|---|---|---|---|
| OZ Okanogan | Greenfield | WA | Okanogan | — | — | 3.5 yrs | 57.0 |
| BREWSTER | Substation-Adjacent | WA | Douglas County | 115 kV | 100 MW | 3.5 yrs | 56.4 |
| PATEROS | Substation-Adjacent | WA | Douglas County | 115 kV | 100 MW | 3.5 yrs | 56.3 |
| UNKNOWN209274 | Substation-Adjacent | WA | Okanogan County | 115 kV | 100 MW | 3.5 yrs | 54.4 |
| UNKNOWN206245 | Substation-Adjacent | WA | Okanogan County | 115 kV | 100 MW | 3.5 yrs | 52.7 |
| TWISP | Substation-Adjacent | WA | Okanogan County | 115 kV | 100 MW | 3.5 yrs | 52.1 |
| MASON, CHIEF JOSEPH PROJECT | Federal Excess | WA | Chelan County | — | — | 3.5 yrs | 50.2 |
| WINTHROP | Substation-Adjacent | WA | Okanogan County | 115 kV | 100 MW | 3.5 yrs | 48.9 |
Who owns the transmission lines at TAP203458?
The 3 connected lines listed above are owned by BONNEVILLE POWER ADMINISTRATION, OKANOGAN COUNTY ELEC COOP, INC. Line voltages range from 115 kV to 115 kV. Their combined recorded length is about 21.8 miles.
How do candidate sites near TAP203458 score?
The 8 highest-scoring candidate sites within about 25 miles range from 49 to 57 on the 0–100 DC Readiness scale. They fall in Okanogan, Douglas County, Okanogan County, Chelan 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
What voltage is TAP203458 substation?
TAP203458 has a maximum voltage of 115 kV. That places it in the 115–229 kV band. The median named US substation in this dataset is 115 kV, so TAP203458 is at the national midpoint.
How many transmission lines connect to TAP203458 substation?
3 transmission lines terminate at or pass through TAP203458 in the HIFLD line data. The connected lines listed here run at 115 kV. Together the listed lines cover about 21.8 miles.
Who owns TAP203458 substation?
HIFLD does not publish substation owners directly. Most of the transmission lines that end at TAP203458 belong to OKANOGAN COUNTY ELEC COOP, INC, and others to BONNEVILLE POWER ADMINISTRATION. GridCensus derives this from the line data, so confirm ownership with the utility for anything contractual.
Where is TAP203458 substation located?
TAP203458 is in Washington at 48.3597, -120.0915. The datacenter candidate sites closest to it are in Okanogan, Douglas County, Okanogan County.
Are there datacenter candidate sites near TAP203458 substation?
GridCensus lists at least 8 scored candidate sites within roughly 25 miles of TAP203458. The highest-scoring is OZ Okanogan at 57/100. 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, “TAP203458 substation, Washington”, https://gridcensus.com/substations/washington/tap203458-e8241133 (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 TAP203458 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.