MADISON
SubstationIndiana · DUKE ENERGY INDIANA, LLC
MADISON is an electric transmission substation in Indiana, operated by DUKE ENERGY INDIANA, LLC. It is classified as sub-transmission (138 kv) and connects 6 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 |
|---|---|---|---|---|
| #7363 | 138 kV | DUKE ENERGY INDIANA, LLC | IN SERVICE | 2.6 mi |
| #18956 | 138 kV | DUKE ENERGY INDIANA, LLC | IN SERVICE | 82.2 mi |
| #22992 | 138 kV | DUKE ENERGY INDIANA, LLC | IN SERVICE | 3.3 mi |
| #23969 | 138 kV | — | IN SERVICE | 9.2 mi |
| #25380 | 138 kV | DUKE ENERGY INDIANA, LLC | IN SERVICE | 0.5 mi |
| #39094 | 138 kV | DUKE ENERGY INDIANA, LLC | IN SERVICE | 12.3 mi |
Nearby datacenter candidate sites
Scored candidate sites within roughly 25 miles of MADISON, 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 |
|---|---|---|---|---|---|---|---|
| GWYNNEVILLE | Substation-Adjacent | IN | Shelby County | 345 kV | 600 MW | 3.0 yrs | 71.8 |
| GREENSBORO | Substation-Adjacent | IN | Henry County | 345 kV | 600 MW | 3.0 yrs | 70.4 |
| HEADWATERS WIND FARM II LLC | Substation-Adjacent | IN | Fayette County | 345 kV | 600 MW | 3.0 yrs | 69.9 |
| FALL CREEK | Substation-Adjacent | IN | Madison County | 345 kV | 600 MW | 3.0 yrs | 69.6 |
| TAP138992 | Substation-Adjacent | IN | Hancock County | 230 kV | 300 MW | 3.0 yrs | 69.4 |
| Greenfield (JEFFERSON - GREENTOWN) | Greenfield | IN | Hancock County | 765 kV | 1,000 MW | 3.0 yrs | 69.1 |
| Greenfield (JEFFERSON - GREENTOWN) | Greenfield | IN | Hancock County | 765 kV | 1,000 MW | 3.0 yrs | 69.1 |
| UNKNOWN124480 | Substation-Adjacent | IN | Hancock County | 230 kV | 300 MW | 3.0 yrs | 68.9 |
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 MADISON 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.