TAP203489
SubstationWashington · BONNEVILLE POWER ADMINISTRATION
At a glance
TAP203489 is an electric transmission substation in Washington, on BONNEVILLE POWER ADMINISTRATION'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 |
|---|---|---|---|---|
| #201146 | 115 kV | BONNEVILLE POWER ADMINISTRATION | — | 5.7 mi |
| #201147 | 115 kV | BONNEVILLE POWER ADMINISTRATION | — | 2.0 mi |
| #207615 | 69 kV | AVISTA CORP | — | 8.2 mi |
Nearby datacenter candidate sites
Scored candidate sites within roughly 25 miles of TAP203489, 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 |
|---|---|---|---|---|---|---|---|
| BELL | Substation-Adjacent | WA | Spokane County | 500 kV | 1,000 MW | 3.5 yrs | 68.0 |
| OZ Spokane | Greenfield | WA | Spokane | — | — | 3.5 yrs | 65.4 |
| UNKNOWN201468 | Substation-Adjacent | WA | Spokane County | 230 kV | 300 MW | 3.5 yrs | 64.7 |
| BEACON | Substation-Adjacent | WA | Spokane County | 230 kV | 300 MW | 3.5 yrs | 63.9 |
| WESTSIDE | Substation-Adjacent | WA | Spokane County | 230 kV | 300 MW | 3.5 yrs | 63.4 |
| Greenfield (BELL - TAFT) | Greenfield | AZ | Spokane County | 500 kV | 1,000 MW | 3.5 yrs | 61.4 |
| TAP205391 | Substation-Adjacent | WA | Spokane County | 138 kV | 100 MW | 3.5 yrs | 60.7 |
| UNKNOWN205382 | Substation-Adjacent | WA | Spokane County | 115 kV | 100 MW | 3.5 yrs | 60.7 |
Who owns the transmission lines at TAP203489?
The 3 connected lines listed above are owned by BONNEVILLE POWER ADMINISTRATION, AVISTA CORP. Line voltages range from 69 kV to 115 kV. Their combined recorded length is about 15.9 miles.
How do candidate sites near TAP203489 score?
The 8 highest-scoring candidate sites within about 25 miles range from 61 to 68 on the 0–100 DC Readiness scale. They fall in Spokane County, Spokane. 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 TAP203489 substation?
TAP203489 has a maximum voltage of 115 kV and a minimum of 69 kV. That places it in the 115–229 kV band. The median named US substation in this dataset is 115 kV, so TAP203489 is at the national midpoint.
How many transmission lines connect to TAP203489 substation?
3 transmission lines terminate at or pass through TAP203489 in the HIFLD line data. The connected lines listed here run at 115 kV, 69 kV. Together the listed lines cover about 15.9 miles.
Who owns TAP203489 substation?
HIFLD does not publish substation owners directly. Most of the transmission lines that end at TAP203489 belong to BONNEVILLE POWER ADMINISTRATION, and others to AVISTA CORP. GridCensus derives this from the line data, so confirm ownership with the utility for anything contractual.
Where is TAP203489 substation located?
TAP203489 is in Washington at 47.9321, -117.4912. The datacenter candidate sites closest to it are in Spokane County, Spokane.
Are there datacenter candidate sites near TAP203489 substation?
GridCensus lists at least 8 scored candidate sites within roughly 25 miles of TAP203489. The highest-scoring is BELL 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, “TAP203489 substation, Washington”, https://gridcensus.com/substations/washington/tap203489-181898b5 (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 TAP203489 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.