Substation-Adjacent Datacenter Sites in Idaho
At a glance
Parcels sited next to existing transmission substations. Co-location with a substation is the single strongest speed-to-power signal — interconnection distance is measured in feet, not miles.
Top substation-adjacent sites in Idaho
| Site | Type | County | Voltage | Capacity | Queue wait | Score |
|---|---|---|---|---|---|---|
| HEMINGWAY | Substation-Adjacent | Canyon County | 500 kV | 1,000 MW | 5.0 yrs | 65.9 |
| BOISE BENCH | Substation-Adjacent | Ada County | 230 kV | 300 MW | 5.0 yrs | 65.8 |
| TAP204881 | Substation-Adjacent | Ada County | 230 kV | 300 MW | 5.0 yrs | 65.8 |
| LANCASTER | Substation-Adjacent | Kootenai County | 230 kV | 300 MW | 5.0 yrs | 64.9 |
| HATWAI | Substation-Adjacent | Nez Perce County | 500 kV | 1,000 MW | 5.0 yrs | 64.8 |
| RATHDRUM | Substation-Adjacent | Kootenai County | 230 kV | 300 MW | 5.0 yrs | 64.8 |
| UNKNOWN205032 | Substation-Adjacent | Ada County | 230 kV | 300 MW | 5.0 yrs | 64.7 |
| LOCUSST | Substation-Adjacent | Ada County | 230 kV | 300 MW | 5.0 yrs | 64.6 |
| MORA | Substation-Adjacent | Ada County | 230 kV | 300 MW | 5.0 yrs | 64.3 |
| TAP204885 | Substation-Adjacent | Canyon County | 230 kV | 300 MW | 5.0 yrs | 64.0 |
| NAMPA | Substation-Adjacent | Canyon County | 230 kV | 300 MW | 5.0 yrs | 64.0 |
| MIDPOINT (500KV) | Substation-Adjacent | Jerome County | 500 kV | 1,000 MW | 5.0 yrs | 63.5 |
| RIGBY | Substation-Adjacent | Madison County | 230 kV | 300 MW | 5.0 yrs | 63.4 |
| POPULUS | Substation-Adjacent | Bannock County | 345 kV | 600 MW | 5.0 yrs | 63.4 |
| BOWMONT | Substation-Adjacent | Ada County | 230 kV | 300 MW | 5.0 yrs | 63.2 |
| TAP204718 | Substation-Adjacent | Madison County | 230 kV | 300 MW | 5.0 yrs | 63.2 |
| UNKNOWN202541 | Substation-Adjacent | Canyon County | 230 kV | 300 MW | 5.0 yrs | 62.9 |
| CALDWELL | Substation-Adjacent | Canyon County | 230 kV | 300 MW | 5.0 yrs | 62.6 |
| GOSHEN | Substation-Adjacent | Bingham County | 345 kV | 600 MW | 5.0 yrs | 62.6 |
| 3 MILE KNOLL | Substation-Adjacent | Caribou County | 345 kV | 600 MW | 5.0 yrs | 62.3 |
| TAP203129 | Substation-Adjacent | Minidoka County | 345 kV | 600 MW | 5.0 yrs | 62.3 |
| ADELAIDE | Substation-Adjacent | Minidoka County | 345 kV | 600 MW | 5.0 yrs | 62.2 |
| DWORSHAK | Substation-Adjacent | Lewis County | 500 kV | 1,000 MW | 5.0 yrs | 62.1 |
| KINPORT | Substation-Adjacent | Power County | 345 kV | 600 MW | 5.0 yrs | 62.0 |
| TAP204882 | Substation-Adjacent | Ada County | 138 kV | 100 MW | 5.0 yrs | 61.9 |
How does Idaho compare with other states for substation-adjacent sites?
With 646 sites, Idaho ranks 31st of the 52 states that have any substation-adjacent candidate sites. Texas leads with 3,635. Nationally, substation-adjacent sites average 57.4/100 DC Readiness, above the 53.0 average across all site types. Across every site type, Idaho averages 51.7, the 44th-highest of 52 states, and its candidate sites face an average interconnection-queue wait of 4.9 years.
Where are the highest-scoring substation-adjacent sites in Idaho?
The top 25 range from 65.9 to 61.9 on the 0–100 DC Readiness Score. They are concentrated in Ada County (7), Canyon County (5), Kootenai County (2) and Madison County (2). By grid region, 25 are in WECC.
County pages: Ada County · Canyon County · Kootenai County · Madison County
What power, fiber and flood exposure do these substation-adjacent sites have?
Of the top 25 substation-adjacent sites in Idaho, 25 have a recorded nearest-substation voltage, with a median of 230 kV; for 24 that substation is rated 230 kV or higher. Their counties have a median of 10 fixed fiber broadband providers in FCC data. The median distance to the nearest internet exchange facility is 28 km. The median interconnection-queue wait in their markets is 5.0 years.
Frequently asked questions
How many substation-adjacent datacenter sites are in Idaho?
GridCensus catalogs 646 substation-adjacent datacenter candidate sites in Idaho, 2% of the national total for this type (31st of 52 states).
What is a substation-adjacent datacenter site?
Parcels sited next to existing transmission substations. Co-location with a substation is the single strongest speed-to-power signal — interconnection distance is measured in feet, not miles.
What is the best substation-adjacent datacenter site in Idaho?
By DC Readiness Score, HEMINGWAY in Canyon County ranks first at 65.9/100, followed by BOISE BENCH in Ada County at 65.8.
Which Idaho counties have the best substation-adjacent sites?
The top 25 substation-adjacent sites in Idaho are concentrated in Ada County (7), Canyon County (5), Kootenai County (2) and Madison County (2).
How does Idaho score for datacenters overall?
All 2,171 scored sites in Idaho average 51.7/100 DC Readiness, the 44th-highest of 52 states, against a national average of 53.0.
More on substation-adjacent sites and Idaho
Substation-Adjacent sites in other states
- Substation-Adjacent sites in Texas· 3,635 sites
- Substation-Adjacent sites in California· 1,573 sites
- Substation-Adjacent sites in Florida· 1,539 sites
- Substation-Adjacent sites in Georgia· 1,530 sites
- Substation-Adjacent sites in Oklahoma· 1,344 sites
- Substation-Adjacent sites in Washington· 1,343 sites
- Substation-Adjacent sites in Minnesota· 1,270 sites
- Substation-Adjacent sites in Kentucky· 1,261 sites
Dataset updated . Screening estimates derived from public data sources.
About this data
Source: GridCensus composite of HIFLD transmission and substation data, EIA, FEMA National Risk Index, FCC broadband data, PeeringDB and ISO interconnection queues, as published November 12, 2026 — GridCensus refreshes it monthly. See the methodology for how records are matched, cleaned and scored.
Cite as: GridCensus, “Substation-Adjacent datacenter sites in Idaho”, https://gridcensus.com/site-types/substation/idaho (data as of November 12, 2026).
Go deeper than the public screen
Every site and score for Substation-Adjacent sites in 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.