TOMPKINS
SubstationMichigan · CONSUMERS ENERGY CO
TOMPKINS is an electric transmission substation in Michigan, operated by CONSUMERS ENERGY CO. It is classified as high-voltage (345 kv) and connects 6 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 |
|---|---|---|---|---|
| #21520 | 345 kV | CONSUMERS ENERGY CO | IN SERVICE | 59.0 mi |
| #45074 | 345 kV | CONSUMERS ENERGY CO | IN SERVICE | 27.8 mi |
| #2325 | 138 kV | CONSUMERS ENERGY CO | IN SERVICE | 17.5 mi |
| #21915 | 138 kV | CONSUMERS ENERGY CO | IN SERVICE | 2.2 mi |
| #23318 | 138 kV | CONSUMERS ENERGY CO | IN SERVICE | 7.0 mi |
| #42630 | 138 kV | CONSUMERS ENERGY CO | IN SERVICE | 17.5 mi |
Nearby datacenter candidate sites
Scored candidate sites within roughly 25 miles of TOMPKINS, 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 |
|---|---|---|---|---|---|---|---|
| Eckert Station | Brownfield | MI | Ingham | — | 375 MW | — | 80.1 |
| LANSING BWL REO TOWN PLANT | Substation-Adjacent | MI | Ingham County | 138 kV | 100 MW | 2.2 yrs | 75.4 |
| UNKNOWN156787 | Substation-Adjacent | MI | Eaton County | 138 kV | 100 MW | 2.2 yrs | 74.3 |
| UNKNOWN159080 | Substation-Adjacent | MI | Ingham County | 138 kV | 100 MW | 2.2 yrs | 73.2 |
| UNKNOWN128596 | Substation-Adjacent | MI | Eaton County | 138 kV | 100 MW | 2.2 yrs | 73.2 |
| UNKNOWN159082 | Substation-Adjacent | MI | Ingham County | 138 kV | 100 MW | 2.2 yrs | 73.0 |
| TAP139919 | Substation-Adjacent | MI | Ingham County | 138 kV | 100 MW | 2.2 yrs | 72.5 |
| DELHI | Substation-Adjacent | MI | Ingham County | 138 kV | 100 MW | 2.2 yrs | 72.2 |
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 TOMPKINS 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.