PLYMOUTH
SubstationIndiana · NORTHERN INDIANA PUB SERV CO
PLYMOUTH is an electric transmission substation in Indiana, operated by NORTHERN INDIANA PUB SERV CO. It is classified as sub-transmission (138 kv) and connects 5 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 |
|---|---|---|---|---|
| #5793 | 138 kV | NORTHERN INDIANA PUB SERV CO | IN SERVICE | 8.3 mi |
| #15148 | 138 kV | NORTHERN INDIANA PUB SERV CO | IN SERVICE | 20.3 mi |
| #27969 | 138 kV | NORTHERN INDIANA PUB SERV CO | IN SERVICE | 20.8 mi |
| #28602 | 138 kV | NORTHERN INDIANA PUB SERV CO | IN SERVICE | 20.3 mi |
| #43543 | 138 kV | NORTHERN INDIANA PUB SERV CO | IN SERVICE | 8.3 mi |
Nearby datacenter candidate sites
Scored candidate sites within roughly 25 miles of PLYMOUTH, 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 |
|---|---|---|---|---|---|---|---|
| DUMONT | Substation-Adjacent | IN | St. Joseph County | 765 kV | 1,000 MW | 2.2 yrs | 80.4 |
| ST. JOHN | Substation-Adjacent | IN | St. Joseph County | 345 kV | 600 MW | 2.2 yrs | 80.3 |
| TAP138974 | Substation-Adjacent | MI | Cass County | 345 kV | 600 MW | 2.2 yrs | 76.8 |
| JACKSON ROAD | Substation-Adjacent | IN | St. Joseph County | 345 kV | 600 MW | 3.0 yrs | 73.7 |
| OLIVE | Substation-Adjacent | IN | LaPorte County | 345 kV | 600 MW | 2.2 yrs | 73.5 |
| DUMONT | Substation-Adjacent | IN | Marshall County | 765 kV | 1,000 MW | 3.0 yrs | 72.7 |
| UNKNOWN123072 | Substation-Adjacent | IN | St. Joseph County | 138 kV | 100 MW | 2.2 yrs | 72.5 |
| Greenfield (JACKSON ROAD - COOK) | Greenfield | IN | St. Joseph County | 345 kV | 600 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 PLYMOUTH substation, Indiana. 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.