IRON RIVER
SubstationWisconsin · NORTHERN STATES POWER CO - WISCONSIN
At a glance
IRON RIVER is an electric transmission substation in Wisconsin, on NORTHERN STATES POWER CO - WISCONSIN's transmission network. It is classified as distribution (<69 kv) and connects 2 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 |
|---|---|---|---|---|
| #166509 | 35 kV | NORTHERN STATES POWER CO - WISCONSIN | IN SERVICE | 0.0 mi |
| #110503 | — | NORTHERN STATES POWER CO - WISCONSIN | IN SERVICE | 0.0 mi |
Nearby datacenter candidate sites
Scored candidate sites within roughly 25 miles of IRON RIVER, 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 |
|---|---|---|---|---|---|---|---|
| UNKNOWN129294 | Substation-Adjacent | MN | Douglas County | 115 kV | 100 MW | 4.3 yrs | 58.5 |
| TAP173400 | Substation-Adjacent | WI | Bayfield County | 115 kV | 100 MW | 4.3 yrs | 57.2 |
| UNKNOWN138673 | Substation-Adjacent | WI | Sawyer County | 115 kV | 100 MW | 4.3 yrs | 55.4 |
| IRON RIVER NATIONAL FISH HATCHERY | Federal Excess | WI | Bayfield County | — | — | 4.3 yrs | 52.5 |
| IRON RIVER NATIONAL FISH HATCHERY | Federal Excess | WI | Bayfield County | — | — | 4.3 yrs | 52.5 |
| IRON RIVER NATIONAL FISH HATCHERY | Federal Excess | WI | Bayfield County | — | — | 4.3 yrs | 52.5 |
| IRON RIVER NATIONAL FISH HATCHERY | Federal Excess | WI | Bayfield County | — | — | 4.3 yrs | 52.3 |
| IRON RIVER NATIONAL FISH HATCHERY | Federal Excess | WI | Bayfield County | — | — | 4.3 yrs | 52.3 |
How does IRON RIVER compare with other substations in Wisconsin?
Wisconsin has 1,930 substation records in HIFLD, of which 768 carry a station name; the rest are unnamed tap points, risers and line ends. 8 named substations in the state are in IRON RIVER's below 69 kV band (1% of named stations). 710 sit in a higher band. 34 named substations in Wisconsin operate at 345 kV or above. The highest voltage recorded in the state is 345 kV, and the state median is 115 kV.
Who owns the transmission lines at IRON RIVER?
The 2 connected lines listed above are owned by NORTHERN STATES POWER CO - WISCONSIN. Line voltages range from 35 kV to 35 kV. Their combined recorded length is about 0.1 miles.
How do candidate sites near IRON RIVER score?
The 8 highest-scoring candidate sites within about 25 miles range from 52 to 59 on the 0–100 DC Readiness scale. They fall in Douglas County, Bayfield County, Sawyer 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 IRON RIVER substation?
IRON RIVER has a maximum voltage of 35 kV. That places it in the below 69 kV band. The median named US substation in this dataset is 115 kV, so IRON RIVER is below the national midpoint.
How many transmission lines connect to IRON RIVER substation?
2 transmission lines terminate at or pass through IRON RIVER in the HIFLD line data. The connected lines listed here run at 35 kV. Together the listed lines cover about 0.1 miles.
Who owns IRON RIVER substation?
HIFLD does not publish substation owners directly. Most of the transmission lines that end at IRON RIVER 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 IRON RIVER substation located?
IRON RIVER is in Wisconsin at 46.6183, -91.4490. The datacenter candidate sites closest to it are in Douglas County, Bayfield County, Sawyer County.
Are there datacenter candidate sites near IRON RIVER substation?
GridCensus lists at least 8 scored candidate sites within roughly 25 miles of IRON RIVER. The highest-scoring is UNKNOWN129294 at 59/100. Across Wisconsin, the average DC Readiness score is 55.4.
Other 35 kV substations 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, “IRON RIVER substation, Wisconsin”, https://gridcensus.com/substations/wisconsin/iron-river-7ee28497 (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 IRON RIVER 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.