TAP206867
SubstationMontana · NORTHWESTERN ENERGY LLC - (MT)
At a glance
TAP206867 is an electric transmission substation in Montana, on NORTHWESTERN ENERGY LLC - (MT)'s transmission network. It is classified as sub-transmission (138 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 |
|---|---|---|---|---|
| #207729 | 138 kV | NORTHWESTERN ENERGY LLC - (MT) | — | 24.4 mi |
| #207730 | 138 kV | NORTHWESTERN ENERGY LLC - (MT) | — | 0.3 mi |
| #209192 | 69 kV | NORTHWESTERN ENERGY LLC - (MT) | — | 2.4 mi |
Nearby datacenter candidate sites
Scored candidate sites within roughly 25 miles of TAP206867, 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 |
|---|---|---|---|---|---|---|---|
| DEAD HEAD | Substation-Adjacent | MT | Granite County | 138 kV | 100 MW | 1.1 yrs | 60.6 |
| UNKNOWN206597 | Substation-Adjacent | MT | Deer Lodge County | 138 kV | 100 MW | 1.1 yrs | 59.1 |
| UNKNOWN206598 | Substation-Adjacent | MT | Deer Lodge County | 138 kV | 100 MW | 1.1 yrs | 58.9 |
| TAP206595 | Substation-Adjacent | MT | Deer Lodge County | 138 kV | 100 MW | 1.1 yrs | 58.7 |
| TAP204601 | Substation-Adjacent | MT | Powell County | 138 kV | 100 MW | 1.1 yrs | 58.7 |
| TAP207804 | Substation-Adjacent | MT | Granite County | 69 kV | 50 MW | 1.1 yrs | 58.3 |
| UNKNOWN207812 | Substation-Adjacent | MT | Powell County | 69 kV | 50 MW | 1.1 yrs | 56.2 |
| TAP207813 | Substation-Adjacent | MT | Powell County | 69 kV | 50 MW | 1.1 yrs | 56.2 |
Who owns the transmission lines at TAP206867?
The 3 connected lines listed above are owned by NORTHWESTERN ENERGY LLC - (MT). Line voltages range from 69 kV to 138 kV. Their combined recorded length is about 27.1 miles.
How do candidate sites near TAP206867 score?
The 8 highest-scoring candidate sites within about 25 miles range from 56 to 61 on the 0–100 DC Readiness scale. They fall in Granite County, Deer Lodge County, Powell 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 TAP206867 substation?
TAP206867 has a maximum voltage of 138 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 TAP206867 is above the national midpoint.
How many transmission lines connect to TAP206867 substation?
3 transmission lines terminate at or pass through TAP206867 in the HIFLD line data. The connected lines listed here run at 138 kV, 69 kV. Together the listed lines cover about 27.1 miles.
Who owns TAP206867 substation?
HIFLD does not publish substation owners directly. Most of the transmission lines that end at TAP206867 belong to NORTHWESTERN ENERGY LLC - (MT). GridCensus derives this from the line data, so confirm ownership with the utility for anything contractual.
Where is TAP206867 substation located?
TAP206867 is in Montana at 46.3475, -113.3128. The datacenter candidate sites closest to it are in Granite County, Deer Lodge County, Powell County.
Are there datacenter candidate sites near TAP206867 substation?
GridCensus lists at least 8 scored candidate sites within roughly 25 miles of TAP206867. The highest-scoring is DEAD HEAD 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, “TAP206867 substation, Montana”, https://gridcensus.com/substations/montana/tap206867-e16cdeb8 (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 TAP206867 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.