TWIN BRANCH (138 KV)
SubstationIndiana · INDIANA MICHIGAN POWER CO
TWIN BRANCH (138 KV) is an electric transmission substation in Indiana, operated by INDIANA MICHIGAN POWER CO. It is classified as sub-transmission (138 kv) and connects 9 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 |
|---|---|---|---|---|
| #3566 | 138 kV | INDIANA MICHIGAN POWER CO | IN SERVICE | 0.2 mi |
| #8624 | 138 kV | — | IN SERVICE | 20.6 mi |
| #8625 | 138 kV | INDIANA MICHIGAN POWER CO | IN SERVICE | 1.1 mi |
| #16548 | 138 kV | INDIANA MICHIGAN POWER CO | IN SERVICE | 4.9 mi |
| #23344 | 138 kV | — | IN SERVICE | 32.1 mi |
| #30025 | 138 kV | INDIANA MICHIGAN POWER CO | IN SERVICE | 0.2 mi |
| #31672 | 138 kV | INDIANA MICHIGAN POWER CO | IN SERVICE | 0.2 mi |
| #39117 | 138 kV | INDIANA MICHIGAN POWER CO | — | 4.9 mi |
| #40703 | 138 kV | INDIANA MICHIGAN POWER CO | IN SERVICE | 8.4 mi |
Nearby datacenter candidate sites
Scored candidate sites within roughly 25 miles of TWIN BRANCH (138 KV), 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 |
| KENZIE CREEK | Substation-Adjacent | MI | Cass County | 345 kV | 600 MW | 2.2 yrs | 77.2 |
| TAP138974 | Substation-Adjacent | MI | Cass County | 345 kV | 600 MW | 2.2 yrs | 76.8 |
| COOK | Substation-Adjacent | MI | Berrien County | 765 kV | 1,000 MW | 2.2 yrs | 75.5 |
| TAP145860 | Substation-Adjacent | MI | Cass County | 138 kV | 100 MW | 2.2 yrs | 73.7 |
| JACKSON ROAD | Substation-Adjacent | IN | St. Joseph County | 345 kV | 600 MW | 3.0 yrs | 73.7 |
| TAP138973 | Substation-Adjacent | MI | Cass County | 345 kV | 600 MW | 2.2 yrs | 73.6 |
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 TWIN BRANCH (138 KV) 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.