TAP138973
SubstationMichigan · NORTHERN INDIANA PUB SERV CO
TAP138973 is an electric transmission substation in Michigan, operated by NORTHERN INDIANA PUB SERV CO. It is classified as high-voltage (345 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 |
|---|---|---|---|---|
| #32334 | 345 kV | — | IN SERVICE | 21.1 mi |
| #34799 | 345 kV | NORTHERN INDIANA PUB SERV CO | IN SERVICE | 2.1 mi |
| #46820 | 345 kV | NORTHERN INDIANA PUB SERV CO | IN SERVICE | 56.2 mi |
Nearby datacenter candidate sites
Scored candidate sites within roughly 25 miles of TAP138973, 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 |
|---|---|---|---|---|---|---|---|
| TAP138974 | Substation-Adjacent | MI | Cass County | 345 kV | 600 MW | 2.2 yrs | 76.8 |
| HIPLE | Substation-Adjacent | IN | Elkhart County | 345 kV | 600 MW | 2.2 yrs | 74.1 |
| TAP145860 | Substation-Adjacent | MI | Cass County | 138 kV | 100 MW | 2.2 yrs | 73.7 |
| TAP138973 | Substation-Adjacent | MI | Cass County | 345 kV | 600 MW | 2.2 yrs | 73.6 |
| WEEDS LAKE | Substation-Adjacent | MI | Kalamazoo County | 345 kV | 600 MW | 2.2 yrs | 73.0 |
| UNKNOWN122939 | Substation-Adjacent | IN | Elkhart County | 345 kV | 600 MW | 2.2 yrs | 72.9 |
| TWIN BRANCH (138 KV) | Substation-Adjacent | IN | St. Joseph County | 138 kV | 100 MW | 2.2 yrs | 72.2 |
| UNKNOWN123080 | Substation-Adjacent | IN | Elkhart County | 138 kV | 100 MW | 2.2 yrs | 71.9 |
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 TAP138973 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.