WESTONE SW YD
SubstationWisconsin · NORTHERN STATES POWER CO - WISCONSIN
At a glance
WESTONE SW YD is an electric transmission substation in Wisconsin, on NORTHERN STATES POWER CO - WISCONSIN's transmission network. It is classified as unclassified 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
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 |
|---|---|---|---|---|
| #121077 | — | NORTHERN STATES POWER CO - WISCONSIN | IN SERVICE | 0.2 mi |
| #174611 | — | NORTHERN STATES POWER CO - WISCONSIN | IN SERVICE | 8.0 mi |
| #174613 | — | NORTHERN STATES POWER CO - WISCONSIN | IN SERVICE | 2.8 mi |
| #174616 | — | NORTHERN STATES POWER CO - WISCONSIN | IN SERVICE | 10.1 mi |
Nearby datacenter candidate sites
Scored candidate sites within roughly 25 miles of WESTONE SW YD, 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 |
|---|---|---|---|---|---|---|---|
| ARPIN | Substation-Adjacent | WI | Wood County | 345 kV | 600 MW | 4.3 yrs | 67.8 |
| UNKNOWN133208 | Substation-Adjacent | WI | Marathon County | 345 kV | 600 MW | 4.3 yrs | 67.2 |
| ROCKY RUN | Substation-Adjacent | WI | Portage County | 345 kV | 600 MW | 4.3 yrs | 65.6 |
| GARDNER PARK | Substation-Adjacent | WI | Marathon County | 345 kV | 600 MW | 4.3 yrs | 65.4 |
| OZ Portage | Greenfield | WI | Portage | — | — | 4.3 yrs | 62.4 |
| EC Near Weston | Greenfield | WI | Marathon | — | — | 4.3 yrs | 61.5 |
| SIGEL | Substation-Adjacent | WI | Wood County | 138 kV | 100 MW | 4.3 yrs | 61.4 |
| EC Near Domtar Paper Company Rothschild | Greenfield | WI | Marathon | — | — | 4.3 yrs | 60.5 |
Who owns the transmission lines at WESTONE SW YD?
The 4 connected lines listed above are owned by NORTHERN STATES POWER CO - WISCONSIN. Their combined recorded length is about 21 miles.
How do candidate sites near WESTONE SW YD score?
The 8 highest-scoring candidate sites within about 25 miles range from 61 to 68 on the 0–100 DC Readiness scale. They fall in Wood County, Marathon County, Portage County, Portage. The Wisconsin average across 3,340 scored sites is 55.4. 1,248 of those Wisconsin sites are classed as substation sites (candidate locations generated at an existing substation).
Frequently asked questions
How many transmission lines connect to WESTONE SW YD substation?
4 transmission lines terminate at or pass through WESTONE SW YD in the HIFLD line data. Together the listed lines cover about 21 miles.
Who owns WESTONE SW YD substation?
HIFLD does not publish substation owners directly. Most of the transmission lines that end at WESTONE SW YD belong to NORTHERN STATES POWER CO - WISCONSIN. GridCensus derives this from the line data, so confirm ownership with the utility for anything contractual.
Where is WESTONE SW YD substation located?
WESTONE SW YD is in Wisconsin at 44.8586, -89.6552. The datacenter candidate sites closest to it are in Wood County, Marathon County, Portage County.
Are there datacenter candidate sites near WESTONE SW YD substation?
GridCensus lists at least 8 scored candidate sites within roughly 25 miles of WESTONE SW YD. The highest-scoring is ARPIN at 68/100. Across Wisconsin, the average DC Readiness score is 55.4.
More in Wisconsin
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, “WESTONE SW YD substation, Wisconsin”, https://gridcensus.com/substations/wisconsin/westone-sw-yd-e86f2431 (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 WESTONE SW YD substation, Wisconsin 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.