GWYNNEVILLE
SubstationIndiana · DUKE ENERGY INDIANA, LLC
GWYNNEVILLE is an electric transmission substation in Indiana, operated by DUKE ENERGY INDIANA, LLC. 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 |
|---|---|---|---|---|
| #1633 | 345 kV | DUKE ENERGY INDIANA, LLC | IN SERVICE | 22.7 mi |
| #6694 | 345 kV | — | IN SERVICE | 33.5 mi |
| #18017 | 345 kV | DUKE ENERGY INDIANA, LLC | IN SERVICE | 10.9 mi |
Nearby datacenter candidate sites
Scored candidate sites within roughly 25 miles of GWYNNEVILLE, 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 |
|---|---|---|---|---|---|---|---|
| SUNNYSIDE | Substation-Adjacent | IN | Marion County | 345 kV | 600 MW | 3.0 yrs | 73.8 |
| UNKNOWN125098 | Substation-Adjacent | IN | Johnson County | 230 kV | 300 MW | 3.0 yrs | 72.1 |
| GWYNNEVILLE | Substation-Adjacent | IN | Shelby County | 345 kV | 600 MW | 3.0 yrs | 71.8 |
| UNKNOWN125086 | Substation-Adjacent | IN | Bartholomew County | 345 kV | 600 MW | 3.0 yrs | 71.6 |
| UNKNOWN124474 | Substation-Adjacent | IN | Marion County | 230 kV | 300 MW | 3.0 yrs | 71.1 |
| GREENSBORO | Substation-Adjacent | IN | Henry County | 345 kV | 600 MW | 3.0 yrs | 70.4 |
| UNKNOWN124358 | Substation-Adjacent | IN | Marion County | 138 kV | 100 MW | 3.0 yrs | 69.6 |
| CASTLETON | Substation-Adjacent | IN | Hamilton County | 138 kV | 100 MW | 3.0 yrs | 69.6 |
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 GWYNNEVILLE 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.