EMPIRE MINE
SubstationMichigan
At a glance
EMPIRE MINE is an electric transmission substation in Michigan. It is classified as sub-transmission (138 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
Ownership & operation
Operator not catalogued for this substation.
Nearby datacenter candidate sites
Scored candidate sites within roughly 25 miles of EMPIRE MINE, 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 |
|---|---|---|---|---|---|---|---|
| DEAD RIVER | Substation-Adjacent | MI | Marquette County | 345 kV | 600 MW | 2.2 yrs | 66.4 |
| ARNOLD | Substation-Adjacent | MI | Dickinson County | 345 kV | 600 MW | 2.2 yrs | 63.3 |
| EC Coal Marquette County | Greenfield | MI | Marquette County | — | — | 2.2 yrs | 59.8 |
| TAP138651 | Substation-Adjacent | MI | Marquette County | 138 kV | 100 MW | 2.2 yrs | 57.7 |
| PERCH LAKE | Substation-Adjacent | MI | Marquette County | 138 kV | 100 MW | 2.2 yrs | 57.7 |
| DEADEND172040 | Substation-Adjacent | MI | Marquette County | 138 kV | 100 MW | 2.2 yrs | 57.6 |
| NATIONAL | Substation-Adjacent | MI | Marquette County | 138 kV | 100 MW | 2.2 yrs | 57.5 |
| FORSYTH | Substation-Adjacent | MI | Dickinson County | 138 kV | 100 MW | 2.2 yrs | 57.3 |
How does EMPIRE MINE 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. 106 named substations in the state are in EMPIRE MINE's 115–229 kV band (38% of named stations). 44 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.
How do candidate sites near EMPIRE MINE score?
The 8 highest-scoring candidate sites within about 25 miles range from 57 to 66 on the 0–100 DC Readiness scale. They fall in Marquette County, Dickinson 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 EMPIRE MINE substation?
EMPIRE MINE has a maximum voltage of 138 kV. That places it in the 115–229 kV band. The median named US substation in this dataset is 115 kV, so EMPIRE MINE is above the national midpoint.
How many transmission lines connect to EMPIRE MINE substation?
4 transmission lines terminate at or pass through EMPIRE MINE in the HIFLD line data.
Where is EMPIRE MINE substation located?
EMPIRE MINE is in Michigan at 46.4462, -87.6048. The datacenter candidate sites closest to it are in Marquette County, Dickinson County.
Are there datacenter candidate sites near EMPIRE MINE substation?
GridCensus lists at least 8 scored candidate sites within roughly 25 miles of EMPIRE MINE. The highest-scoring is DEAD RIVER at 66/100. Across Michigan, the average DC Readiness score is 55.2.
Other 138 kV substations in Michigan
- JACKSON· 14 lines
- VERONA· 11 lines
- DELHI· 10 lines
- BEECHER· 9 lines
- CHANDLER· 9 lines
- WEADOCK· 9 lines
- PRESQUE ISLE STATION· 8 lines
- BLACK RIVER· 7 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, “EMPIRE MINE substation, Michigan”, https://gridcensus.com/substations/michigan/empire-mine-f7d208f4 (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 EMPIRE MINE 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.