TALLMADGE
SubstationWisconsin · WOLVERINE POWER SUPPLY COOP
TALLMADGE is an electric transmission substation in Wisconsin, operated by WOLVERINE POWER SUPPLY COOP. It is classified as high-voltage (345 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
Connected transmission lines
Lines terminating at or passing through this substation, by HIFLD line ID, highest voltage first.
| Line ID | Voltage | Owner | Status | Length |
|---|---|---|---|---|
| #29503 | 345 kV | WOLVERINE POWER SUPPLY COOP | IN SERVICE | 80.1 mi |
| #35703 | 345 kV | — | IN SERVICE | 80.1 mi |
Nearby datacenter candidate sites
Scored candidate sites within roughly 25 miles of TALLMADGE, 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 |
|---|---|---|---|---|---|---|---|
| KENOWA | Substation-Adjacent | MI | Kent County | 345 kV | 600 MW | 1.4 yrs | 74.1 |
| UNKNOWN132534 | Substation-Adjacent | MI | Ottawa County | 138 kV | 100 MW | 2.2 yrs | 70.3 |
| TALLMADGE | Substation-Adjacent | MI | Muskegon County | 345 kV | 600 MW | 1.4 yrs | 70.3 |
| UNKNOWN128728 | Substation-Adjacent | MI | Ottawa County | 138 kV | 100 MW | 2.2 yrs | 68.1 |
| TAP140398 | Substation-Adjacent | MI | Ottawa County | 138 kV | 100 MW | 2.2 yrs | 67.9 |
| Greenfield (KENOWA - TALLMADGE) | Greenfield | MI | Kent County | 345 kV | 600 MW | 2.2 yrs | 67.8 |
| Greenfield (TALLMADGE - LUDINGTON) | Greenfield | MI | Kent County | 345 kV | 600 MW | 1.4 yrs | 67.3 |
| B C COBB | Substation-Adjacent | MI | Ottawa County | 138 kV | 100 MW | 2.2 yrs | 67.2 |
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 TALLMADGE substation, Wisconsin. 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.