TAP205579
SubstationMontana
At a glance
TAP205579 is an electric transmission substation in Montana. 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 & operation
Operator not catalogued for this substation.
Nearby datacenter candidate sites
Scored candidate sites within roughly 25 miles of TAP205579, 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 Big Horn | Greenfield | MT | Big Horn | — | — | 1.1 yrs | 60.9 |
| EC Coal Big Horn County | Greenfield | MT | Big Horn County | — | — | 1.1 yrs | 60.8 |
| UNKNOWN203072 | Substation-Adjacent | MT | Big Horn County | 115 kV | 100 MW | 1.1 yrs | 59.9 |
| TAP205579 | Substation-Adjacent | MT | Big Horn County | 115 kV | 100 MW | 1.1 yrs | 58.9 |
| UNKNOWN202648 | Substation-Adjacent | MT | Big Horn County | 115 kV | 100 MW | 1.1 yrs | 58.8 |
| TAP205585 | Substation-Adjacent | MT | Big Horn County | 115 kV | 100 MW | 1.1 yrs | 58.7 |
| TAP205580 | Substation-Adjacent | MT | Big Horn County | 115 kV | 100 MW | 1.1 yrs | 58.6 |
| UNKNOWN205577 | Substation-Adjacent | MT | Big Horn County | 115 kV | 100 MW | 1.1 yrs | 58.0 |
How do candidate sites near TAP205579 score?
The 8 highest-scoring candidate sites within about 25 miles range from 58 to 61 on the 0–100 DC Readiness scale. They fall in Big Horn, Big Horn 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 TAP205579 substation?
TAP205579 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 TAP205579 is at the national midpoint.
How many transmission lines connect to TAP205579 substation?
3 transmission lines terminate at or pass through TAP205579 in the HIFLD line data.
Where is TAP205579 substation located?
TAP205579 is in Montana at 45.3042, -107.3638. The datacenter candidate sites closest to it are in Big Horn, Big Horn County.
Are there datacenter candidate sites near TAP205579 substation?
GridCensus lists at least 8 scored candidate sites within roughly 25 miles of TAP205579. The highest-scoring is OZ Big Horn at 61/100. 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, “TAP205579 substation, Montana”, https://gridcensus.com/substations/montana/tap205579-84c6dc85 (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 TAP205579 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.