CHATHAM
SubstationMichigan
At a glance
CHATHAM is an electric transmission substation in Michigan. It is classified as distribution (69–115 kv) and connects 1 transmission line. 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
No owner is recorded for the lines that connect here.
Connected transmission lines
Lines terminating at or passing through this substation, by HIFLD line ID, highest voltage first.
| Line ID | Voltage | Owner | Status | Length |
|---|---|---|---|---|
| #173591 | 69 kV | — | IN SERVICE | 24.6 mi |
| #173592 | 69 kV | — | IN SERVICE | 0.0 mi |
| #173931 | 69 kV | — | IN SERVICE | 5.5 mi |
Nearby datacenter candidate sites
Scored candidate sites within roughly 25 miles of CHATHAM, 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 |
|---|---|---|---|---|---|---|---|
| MUNISING | Substation-Adjacent | MI | Alger County | 138 kV | 100 MW | 2.2 yrs | 58.6 |
| ATC PERKINS | Substation-Adjacent | MI | Delta County | 138 kV | 100 MW | 2.2 yrs | 58.2 |
| ALGER | Substation-Adjacent | MI | Alger County | 69 kV | 50 MW | 2.2 yrs | 56.1 |
| TAP171290 | Substation-Adjacent | MI | Alger County | 69 kV | 50 MW | 2.2 yrs | 56.1 |
| HIAWATHA (AD-REA) | Substation-Adjacent | MI | Alger County | 69 kV | 50 MW | 2.2 yrs | 56.0 |
| FOREST LAKE | Substation-Adjacent | MI | Alger County | 69 kV | 50 MW | 2.2 yrs | 55.6 |
| EC Near Shiras | Greenfield | MI | Marquette | — | — | 2.2 yrs | 55.4 |
| TAP171291 | Substation-Adjacent | MI | Alger County | 69 kV | 50 MW | 2.2 yrs | 55.2 |
How does CHATHAM 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. 89 named substations in the state are in CHATHAM's 69–114 kV band (32% of named stations). 150 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 CHATHAM score?
The 8 highest-scoring candidate sites within about 25 miles range from 55 to 59 on the 0–100 DC Readiness scale. They fall in Alger County, Delta County, Marquette. 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 CHATHAM substation?
CHATHAM 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 CHATHAM is below the national midpoint.
How many transmission lines connect to CHATHAM substation?
1 transmission line terminate at or pass through CHATHAM in the HIFLD line data. The connected lines listed here run at 69 kV. Together the listed lines cover about 30.2 miles.
Where is CHATHAM substation located?
CHATHAM is in Michigan at 46.3456, -86.9659. The datacenter candidate sites closest to it are in Alger County, Delta County, Marquette.
Are there datacenter candidate sites near CHATHAM substation?
GridCensus lists at least 8 scored candidate sites within roughly 25 miles of CHATHAM. The highest-scoring is MUNISING at 59/100. Across Michigan, the average DC Readiness score is 55.2.
Other 69 kV substations in Michigan
- PINE RIVER· 6 lines
- 9 MILE SW STA· 5 lines
- BRULE· 5 lines
- DELTA (UPPCO)· 5 lines
- OLD MEAD ROAD· 5 lines
- TWIN FALLS SW STA· 4 lines
- VICTORIA HY· 4 lines
- 2ND ST· 3 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, “CHATHAM substation, Michigan”, https://gridcensus.com/substations/michigan/chatham-a1a570d5 (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 CHATHAM 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.