GUARDIAN
SubstationIndiana · NORTHERN INDIANA PUB SERV CO
GUARDIAN is an electric transmission substation in Indiana, operated by NORTHERN INDIANA PUB SERV CO. It is classified as sub-transmission (138 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 |
|---|---|---|---|---|
| #23344 | 138 kV | — | IN SERVICE | 32.1 mi |
| #24571 | 138 kV | NORTHERN INDIANA PUB SERV CO | IN SERVICE | 0.9 mi |
Nearby datacenter candidate sites
Scored candidate sites within roughly 25 miles of GUARDIAN, 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 |
| UNKNOWN122939 | Substation-Adjacent | IN | Elkhart County | 345 kV | 600 MW | 2.2 yrs | 72.9 |
| ILLINOIS ROAD | Substation-Adjacent | IN | Allen County | 345 kV | 600 MW | 3.0 yrs | 72.1 |
| DUNLAP | Substation-Adjacent | IN | Elkhart County | 138 kV | 100 MW | 2.2 yrs | 71.9 |
| UNKNOWN123080 | Substation-Adjacent | IN | Elkhart County | 138 kV | 100 MW | 2.2 yrs | 71.9 |
| COLLINGWOOD | Substation-Adjacent | IN | Noble County | 345 kV | 600 MW | 3.0 yrs | 71.6 |
| Greenfield (TAP138974 - WEEDS LAKE) | Greenfield | MI | Cass County | 345 kV | 600 MW | 2.2 yrs | 71.5 |
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 GUARDIAN 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.