HARBOR BEACH
SubstationMichigan · THUMB ELECTRIC COOP OF MICH
HARBOR BEACH is an electric transmission substation in Michigan, operated by THUMB ELECTRIC COOP OF MICH. 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
Connected transmission lines
Lines terminating at or passing through this substation, by HIFLD line ID, highest voltage first.
| Line ID | Voltage | Owner | Status | Length |
|---|---|---|---|---|
| #6939 | 120 kV | THUMB ELECTRIC COOP OF MICH | IN SERVICE | 0.6 mi |
| #34005 | 120 kV | — | IN SERVICE | 7.0 mi |
| #64041 | 120 kV | — | — | 0.1 mi |
Nearby datacenter candidate sites
Scored candidate sites within roughly 25 miles of HARBOR BEACH, 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 |
|---|---|---|---|---|---|---|---|
| RAPSON | Substation-Adjacent | MI | Huron County | 345 kV | 600 MW | 2.2 yrs | 69.5 |
| Harbor Beach | Brownfield | MI | Huron | — | 125 MW | — | 66.6 |
| Greenfield (UNKNOWN145627 - RAPSON) | Greenfield | MI | Huron County | 345 kV | 600 MW | 2.2 yrs | 65.8 |
| MICHIGAN WIND 2 | Substation-Adjacent | MI | Huron County | 120 kV | 100 MW | 2.2 yrs | 65.7 |
| Greenfield (RAPSON - BANNER) | Greenfield | MI | Sanilac County | 345 kV | 600 MW | 2.2 yrs | 65.1 |
| Greenfield (RAPSON - BANNER) | Greenfield | MI | Sanilac County | 345 kV | 600 MW | 2.2 yrs | 65.0 |
| TAP145626 | Substation-Adjacent | MI | Huron County | 120 kV | 100 MW | 2.2 yrs | 64.8 |
| UNKNOWN128840 | Substation-Adjacent | MI | Huron County | 120 kV | 100 MW | 2.2 yrs | 64.7 |
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
This page shows a public slice of the GridCensus dataset for HARBOR BEACH substation, Michigan. Pro and Enterprise plans unlock the full 164,098-site catalog, raw sub-scores, parcel ownership, interconnection-queue detail, saved searches, and programmatic API access.