TAP139665
SubstationWisconsin · NORTHERN STATES POWER CO
At a glance
TAP139665 is an electric transmission substation in Wisconsin, on NORTHERN STATES POWER CO's transmission network. 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
Connected transmission lines
Lines terminating at or passing through this substation, by HIFLD line ID, highest voltage first.
| Line ID | Voltage | Owner | Status | Length |
|---|---|---|---|---|
| #132568 | 115 kV | NORTHERN STATES POWER CO | IN SERVICE | 12.4 mi |
| #144446 | 115 kV | NORTHERN STATES POWER CO | IN SERVICE | 0.0 mi |
| #144563 | 115 kV | NORTHERN STATES POWER CO - WISCONSIN | IN SERVICE | 20.2 mi |
Nearby datacenter candidate sites
Scored candidate sites within roughly 25 miles of TAP139665, 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 |
|---|---|---|---|---|---|---|---|
| UNKNOWN131984 | Substation-Adjacent | WI | Chippewa County | 161 kV | 100 MW | 4.3 yrs | 59.6 |
| EC Near Seven Mile Creek LFG | Greenfield | WI | Eau Claire | — | — | 4.3 yrs | 58.7 |
| UNKNOWN131986 | Substation-Adjacent | WI | Chippewa County | 115 kV | 100 MW | 4.3 yrs | 58.1 |
| TAP139665 | Substation-Adjacent | WI | Rusk County | 115 kV | 100 MW | 4.3 yrs | 57.8 |
| UNKNOWN131985 | Substation-Adjacent | WI | Chippewa County | 115 kV | 100 MW | 4.3 yrs | 57.7 |
| UNKNOWN107657 | Substation-Adjacent | WI | Chippewa County | 115 kV | 100 MW | 4.3 yrs | 57.7 |
| UNKNOWN132502 | Substation-Adjacent | WI | Rusk County | 161 kV | 100 MW | 4.3 yrs | 57.4 |
| UNKNOWN132503 | Substation-Adjacent | WI | Price County | 115 kV | 100 MW | 4.3 yrs | 56.7 |
Who owns the transmission lines at TAP139665?
The 3 connected lines listed above are owned by NORTHERN STATES POWER CO, NORTHERN STATES POWER CO - WISCONSIN. Line voltages range from 115 kV to 115 kV. Their combined recorded length is about 32.7 miles.
How do candidate sites near TAP139665 score?
The 8 highest-scoring candidate sites within about 25 miles range from 57 to 60 on the 0–100 DC Readiness scale. They fall in Chippewa County, Eau Claire, Rusk County, Price 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 TAP139665 substation?
TAP139665 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 TAP139665 is at the national midpoint.
How many transmission lines connect to TAP139665 substation?
3 transmission lines terminate at or pass through TAP139665 in the HIFLD line data. The connected lines listed here run at 115 kV. Together the listed lines cover about 32.7 miles.
Who owns TAP139665 substation?
HIFLD does not publish substation owners directly. Most of the transmission lines that end at TAP139665 belong to NORTHERN STATES POWER CO, and others to NORTHERN STATES POWER CO - WISCONSIN. GridCensus derives this from the line data, so confirm ownership with the utility for anything contractual.
Where is TAP139665 substation located?
TAP139665 is in Wisconsin at 45.2856, -90.9489. The datacenter candidate sites closest to it are in Chippewa County, Eau Claire, Rusk County.
Are there datacenter candidate sites near TAP139665 substation?
GridCensus lists at least 8 scored candidate sites within roughly 25 miles of TAP139665. The highest-scoring is UNKNOWN131984 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, “TAP139665 substation, Wisconsin”, https://gridcensus.com/substations/wisconsin/tap139665-3d1eb3fc (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 TAP139665 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.