TAP158791
SubstationWisconsin · NORTHERN STATES POWER CO - WISCONSIN
At a glance
TAP158791 is an electric transmission substation in Wisconsin, on NORTHERN STATES POWER CO - WISCONSIN's transmission network. 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
Connected transmission lines
Lines terminating at or passing through this substation, by HIFLD line ID, highest voltage first.
| Line ID | Voltage | Owner | Status | Length |
|---|---|---|---|---|
| #159062 | 69 kV | NORTHERN STATES POWER CO - WISCONSIN | IN SERVICE | 6.2 mi |
| #159064 | 69 kV | NORTHERN STATES POWER CO - WISCONSIN | IN SERVICE | 0.3 mi |
| #159066 | 69 kV | NORTHERN STATES POWER CO - WISCONSIN | IN SERVICE | 0.9 mi |
Nearby datacenter candidate sites
Scored candidate sites within roughly 25 miles of TAP158791, 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 |
|---|---|---|---|---|---|---|---|
| UNKNOWN130580 | Substation-Adjacent | IA | Allamakee County | 161 kV | 100 MW | 4.3 yrs | 60.4 |
| EC Coal Vernon County | Greenfield | WI | Vernon County | — | — | 4.3 yrs | 59.7 |
| EC Coal Vernon County | Greenfield | WI | Vernon County | — | — | 4.3 yrs | 59.5 |
| EC Coal La Crosse County | Greenfield | WI | La Crosse County | — | — | 4.3 yrs | 59.5 |
| EC Coal Vernon County | Greenfield | WI | Vernon County | — | — | 4.3 yrs | 59.2 |
| MONROE | Substation-Adjacent | WI | Monroe County | 161 kV | 100 MW | 4.3 yrs | 58.3 |
| UNKNOWN159041 | Substation-Adjacent | WI | Vernon County | 161 kV | 100 MW | 4.3 yrs | 58.0 |
| TAP139568 | Substation-Adjacent | WI | La Crosse County | 161 kV | 100 MW | 4.3 yrs | 57.9 |
Who owns the transmission lines at TAP158791?
The 3 connected lines listed above are owned by NORTHERN STATES POWER CO - WISCONSIN. Line voltages range from 69 kV to 69 kV. Their combined recorded length is about 7.4 miles.
How do candidate sites near TAP158791 score?
The 8 highest-scoring candidate sites within about 25 miles range from 58 to 60 on the 0–100 DC Readiness scale. They fall in Allamakee County, Vernon County, La Crosse County, Monroe County. 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
What voltage is TAP158791 substation?
TAP158791 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 TAP158791 is below the national midpoint.
How many transmission lines connect to TAP158791 substation?
3 transmission lines terminate at or pass through TAP158791 in the HIFLD line data. The connected lines listed here run at 69 kV. Together the listed lines cover about 7.4 miles.
Who owns TAP158791 substation?
HIFLD does not publish substation owners directly. Most of the transmission lines that end at TAP158791 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 TAP158791 substation located?
TAP158791 is in Wisconsin at 43.7327, -90.8109. The datacenter candidate sites closest to it are in Allamakee County, Vernon County, La Crosse County.
Are there datacenter candidate sites near TAP158791 substation?
GridCensus lists at least 8 scored candidate sites within roughly 25 miles of TAP158791. The highest-scoring is UNKNOWN130580 at 60/100. 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, “TAP158791 substation, Wisconsin”, https://gridcensus.com/substations/wisconsin/tap158791-fc40d7a4 (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 TAP158791 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.