TAP204935
SubstationIdaho · AVISTA CORP
At a glance
TAP204935 is an electric transmission substation in Idaho, on AVISTA CORP's transmission network. It is classified as distribution (69–115 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
Connected transmission lines
Lines terminating at or passing through this substation, by HIFLD line ID, highest voltage first.
| Line ID | Voltage | Owner | Status | Length |
|---|---|---|---|---|
| #203541 | 69 kV | AVISTA CORP | — | 5.9 mi |
| #203542 | 69 kV | AVISTA CORP | — | 0.1 mi |
| #203543 | 69 kV | AVISTA CORP | — | 2.8 mi |
Nearby datacenter candidate sites
Scored candidate sites within roughly 25 miles of TAP204935, 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 |
|---|---|---|---|---|---|---|---|
| HATWAI | Substation-Adjacent | ID | Nez Perce County | 500 kV | 1,000 MW | 5.0 yrs | 64.8 |
| NORTH LEWISTON | Substation-Adjacent | ID | Nez Perce County | 230 kV | 300 MW | 5.0 yrs | 60.7 |
| SHAWNEE | Substation-Adjacent | WA | Whitman County | 230 kV | 300 MW | 3.5 yrs | 60.5 |
| LOLO | Substation-Adjacent | ID | Nez Perce County | 230 kV | 300 MW | 5.0 yrs | 60.3 |
| MOSCOW | Substation-Adjacent | ID | Latah County | 230 kV | 300 MW | 5.0 yrs | 59.8 |
| OZ Latah | Greenfield | ID | Latah | — | — | 5.0 yrs | 59.8 |
| EC Near Washington State University | Greenfield | WA | Whitman | — | — | 3.5 yrs | 59.1 |
| EC Near Washington State University | Greenfield | WA | Whitman | — | — | 3.5 yrs | 58.8 |
Who owns the transmission lines at TAP204935?
The 3 connected lines listed above are owned by AVISTA CORP. Line voltages range from 69 kV to 69 kV. Their combined recorded length is about 8.7 miles.
How do candidate sites near TAP204935 score?
The 8 highest-scoring candidate sites within about 25 miles range from 59 to 65 on the 0–100 DC Readiness scale. They fall in Nez Perce County, Whitman County, Latah County, Latah. The Idaho average across 2,171 scored sites is 51.7. 646 of those Idaho sites are classed as substation sites (candidate locations generated at an existing substation).
Frequently asked questions
What voltage is TAP204935 substation?
TAP204935 has a maximum voltage of 69 kV. That places it in the 69–114 kV band. The median named US substation in this dataset is 115 kV, so TAP204935 is below the national midpoint.
How many transmission lines connect to TAP204935 substation?
3 transmission lines terminate at or pass through TAP204935 in the HIFLD line data. The connected lines listed here run at 69 kV. Together the listed lines cover about 8.7 miles.
Who owns TAP204935 substation?
HIFLD does not publish substation owners directly. Most of the transmission lines that end at TAP204935 belong to AVISTA CORP. GridCensus derives this from the line data, so confirm ownership with the utility for anything contractual.
Where is TAP204935 substation located?
TAP204935 is in Idaho at 46.4275, -116.9282. The datacenter candidate sites closest to it are in Nez Perce County, Whitman County, Latah County.
Are there datacenter candidate sites near TAP204935 substation?
GridCensus lists at least 8 scored candidate sites within roughly 25 miles of TAP204935. The highest-scoring is HATWAI at 65/100. Across Idaho, the average DC Readiness score is 51.7.
More in Idaho
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, “TAP204935 substation, Idaho”, https://gridcensus.com/substations/idaho/tap204935-24157bf6 (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 TAP204935 substation, Idaho 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.