TAP208589
SubstationMontana
At a glance
TAP208589 is an electric transmission substation in Montana. 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
Ownership & operation
Operator not catalogued for this substation.
Nearby datacenter candidate sites
Scored candidate sites within roughly 25 miles of TAP208589, 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 |
|---|---|---|---|---|---|---|---|
| EC Coal Big Horn County | Greenfield | WY | Big Horn County | — | — | 4.3 yrs | 59.8 |
| GARLAND | Substation-Adjacent | WY | Big Horn County | 230 kV | 300 MW | 3.5 yrs | 59.1 |
| UNKNOWN203003 | Substation-Adjacent | WY | Big Horn County | 230 kV | 300 MW | 3.5 yrs | 59.0 |
| FRANNIE | Substation-Adjacent | WY | Carbon County | 230 kV | 300 MW | 3.5 yrs | 59.0 |
| UNKNOWN206177 | Substation-Adjacent | MT | Carbon County | 115 kV | 100 MW | 1.1 yrs | 57.6 |
| UNKNOWN206169 | Substation-Adjacent | MT | Carbon County | 69 kV | 50 MW | 1.1 yrs | 56.7 |
| UNKNOWN208590 | Substation-Adjacent | MT | Carbon County | 69 kV | 50 MW | 1.1 yrs | 55.6 |
| UNKNOWN208588 | Substation-Adjacent | MT | Carbon County | 69 kV | 50 MW | 1.1 yrs | 55.6 |
How do candidate sites near TAP208589 score?
The 8 highest-scoring candidate sites within about 25 miles range from 56 to 60 on the 0–100 DC Readiness scale. They fall in Big Horn County, Carbon County. The Montana average across 2,542 scored sites is 54.3. 815 of those Montana sites are classed as substation sites (candidate locations generated at an existing substation).
Frequently asked questions
What voltage is TAP208589 substation?
TAP208589 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 TAP208589 is below the national midpoint.
How many transmission lines connect to TAP208589 substation?
3 transmission lines terminate at or pass through TAP208589 in the HIFLD line data.
Where is TAP208589 substation located?
TAP208589 is in Montana at 45.0134, -108.6251. The datacenter candidate sites closest to it are in Big Horn County, Carbon County.
Are there datacenter candidate sites near TAP208589 substation?
GridCensus lists at least 8 scored candidate sites within roughly 25 miles of TAP208589. The highest-scoring is EC Coal Big Horn County at 60/100. Across Montana, the average DC Readiness score is 54.3.
More in Montana
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, “TAP208589 substation, Montana”, https://gridcensus.com/substations/montana/tap208589-638826e9 (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 TAP208589 substation, Montana 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.