MITCHELL
SubstationSouth Dakota · NORTHWESTERN ENERGY - (SD)
MITCHELL is an electric transmission substation in South Dakota, operated by NORTHWESTERN ENERGY - (SD). It is classified as sub-transmission (115 kv) and connects 4 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
Ownership & operation
Connected transmission lines
Lines terminating at or passing through this substation, by HIFLD line ID, highest voltage first.
| Line ID | Voltage | Owner | Status | Length |
|---|---|---|---|---|
| #13579 | 115 kV | NORTHWESTERN ENERGY - (SD) | IN SERVICE | 2.1 mi |
| #13580 | 115 kV | — | IN SERVICE | 40.7 mi |
| #13593 | 115 kV | — | IN SERVICE | 14.5 mi |
| #52335 | 115 kV | — | IN SERVICE | 46.2 mi |
Nearby datacenter candidate sites
Scored candidate sites within roughly 25 miles of MITCHELL, 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 |
|---|---|---|---|---|---|---|---|
| VT HANLON | Substation-Adjacent | SD | Hanson County | 230 kV | 300 MW | 1.0 yrs | 71.0 |
| UNKNOWN131208 | Substation-Adjacent | SD | Davison County | 230 kV | 300 MW | 1.0 yrs | 70.5 |
| MITCHELL NORTHWEST | Substation-Adjacent | SD | Davison County | 115 kV | 100 MW | 1.0 yrs | 67.8 |
| UNKNOWN131245 | Substation-Adjacent | SD | Hutchinson County | 115 kV | 100 MW | 1.0 yrs | 67.7 |
| DEADEND172596 | Substation-Adjacent | SD | Bon Homme County | 115 kV | 100 MW | 1.0 yrs | 66.8 |
| UNKNOWN131154 | Substation-Adjacent | SD | Hanson County | 230 kV | 300 MW | 1.0 yrs | 65.7 |
| UNKNOWN131249 | Substation-Adjacent | SD | Hutchinson County | 115 kV | 100 MW | 1.0 yrs | 65.2 |
| Greenfield (UNKNOWN131154 - VT HANLON) | Greenfield | SD | Hanson County | 230 kV | 300 MW | 1.0 yrs | 65.1 |
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 MITCHELL substation, South Dakota. 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.