TWIN FALLS SW STA
SubstationMichigan · AMERICAN TRANSMISSION CO
At a glance
TWIN FALLS SW STA is an electric transmission substation in Michigan, on AMERICAN TRANSMISSION CO's transmission network. It is classified as distribution (69–115 kv) and connects 4 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 |
|---|---|---|---|---|
| #103306 | 69 kV | AMERICAN TRANSMISSION CO | IN SERVICE | 7.0 mi |
| #129133 | 69 kV | — | — | 0.1 mi |
| #158825 | 69 kV | — | IN SERVICE | 2.3 mi |
| #158826 | 69 kV | — | IN SERVICE | 9.5 mi |
Nearby datacenter candidate sites
Scored candidate sites within roughly 25 miles of TWIN FALLS SW STA, 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 |
|---|---|---|---|---|---|---|---|
| PLAINS | Substation-Adjacent | MI | Dickinson County | 345 kV | 600 MW | 2.2 yrs | 63.4 |
| WHITE RAPIDS HY | Substation-Adjacent | MI | Marinette County | 138 kV | 100 MW | 2.2 yrs | 57.8 |
| UNKNOWN129052 | Substation-Adjacent | MI | Dickinson County | 138 kV | 100 MW | 2.2 yrs | 57.6 |
| AMBERG | Substation-Adjacent | WI | Marinette County | 138 kV | 100 MW | 4.3 yrs | 57.2 |
| CHALK HILLS HY | Substation-Adjacent | MI | Menominee County | 138 kV | 100 MW | 2.2 yrs | 57.1 |
| NORDIC | Substation-Adjacent | MI | Dickinson County | 138 kV | 100 MW | 2.2 yrs | 57.1 |
| NIAGRA PAPER OF WISCONSIN | Substation-Adjacent | WI | Dickinson County | 138 kV | 100 MW | 4.3 yrs | 56.3 |
| SAGOLA | Substation-Adjacent | MI | Dickinson County | 69 kV | 50 MW | 2.2 yrs | 55.2 |
How does TWIN FALLS SW STA compare with other substations in Michigan?
Michigan has 1,880 substation records in HIFLD, of which 277 carry a station name; the rest are unnamed tap points, risers and line ends. 89 named substations in the state are in TWIN FALLS SW STA's 69–114 kV band (32% of named stations). 150 sit in a higher band. 43 named substations in Michigan operate at 345 kV or above. The highest voltage recorded in the state is 765 kV, and the state median is 138 kV.
Who owns the transmission lines at TWIN FALLS SW STA?
The 4 connected lines listed above are owned by AMERICAN TRANSMISSION CO. Line voltages range from 69 kV to 69 kV. Their combined recorded length is about 18.9 miles.
How do candidate sites near TWIN FALLS SW STA score?
The 8 highest-scoring candidate sites within about 25 miles range from 55 to 63 on the 0–100 DC Readiness scale. They fall in Dickinson County, Marinette County, Menominee County. The Michigan average across 5,157 scored sites is 55.2. 768 of those Michigan sites are classed as substation sites (candidate locations generated at an existing substation).
Frequently asked questions
What voltage is TWIN FALLS SW STA substation?
TWIN FALLS SW STA 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 TWIN FALLS SW STA is below the national midpoint.
How many transmission lines connect to TWIN FALLS SW STA substation?
4 transmission lines terminate at or pass through TWIN FALLS SW STA in the HIFLD line data. The connected lines listed here run at 69 kV. Together the listed lines cover about 18.9 miles.
Who owns TWIN FALLS SW STA substation?
HIFLD does not publish substation owners directly. Most of the transmission lines that end at TWIN FALLS SW STA belong to AMERICAN TRANSMISSION CO. GridCensus derives this from the line data, so confirm ownership with the utility for anything contractual.
Where is TWIN FALLS SW STA substation located?
TWIN FALLS SW STA is in Michigan at 45.8719, -88.0689. The datacenter candidate sites closest to it are in Dickinson County, Marinette County, Menominee County.
Are there datacenter candidate sites near TWIN FALLS SW STA substation?
GridCensus lists at least 8 scored candidate sites within roughly 25 miles of TWIN FALLS SW STA. The highest-scoring is PLAINS at 63/100. Across Michigan, the average DC Readiness score is 55.2.
Other 69 kV substations in Michigan
- PINE RIVER· 6 lines
- 9 MILE SW STA· 5 lines
- BRULE· 5 lines
- DELTA (UPPCO)· 5 lines
- OLD MEAD ROAD· 5 lines
- VICTORIA HY· 4 lines
- 2ND ST· 3 lines
- 3 MILE· 3 lines
- All named substations in Michigan· 277 stations
- Datacenter candidate sites in Michigan· 5,157 sites
- Brownfield and retired plant sites in Michigan
- Substations by state
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, “TWIN FALLS SW STA substation, Michigan”, https://gridcensus.com/substations/michigan/twin-falls-sw-sta-3b168350 (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 TWIN FALLS SW STA substation, Michigan 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.