TAP159537
SubstationSouth Dakota · NORTHWESTERN ENERGY
TAP159537 is an electric transmission substation in South Dakota, operated by NORTHWESTERN ENERGY. It is classified as sub-transmission (115 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 |
|---|---|---|---|---|
| #52326 | 115 kV | NORTHWESTERN ENERGY | IN SERVICE | 0.5 mi |
| #52338 | 115 kV | NORTHWESTERN ENERGY | IN SERVICE | 14.0 mi |
| #52660 | 115 kV | NORTHWESTERN ENERGY | IN SERVICE | 14.6 mi |
Nearby datacenter candidate sites
Scored candidate sites within roughly 25 miles of TAP159537, 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 |
|---|---|---|---|---|---|---|---|
| ELLENDALE 345 KV | Substation-Adjacent | SD | Brown County | 345 kV | 600 MW | 1.4 yrs | 75.0 |
| Greenfield (UNKNOWN175849 - ELLENDALE 345 ) | Greenfield | SD | Day County | 345 kV | 600 MW | 1.4 yrs | 69.4 |
| Greenfield (UNKNOWN175849 - ELLENDALE 345 ) | Greenfield | SD | Brown County | 345 kV | 600 MW | 1.4 yrs | 69.3 |
| GROTON | Substation-Adjacent | SD | Day County | 345 kV | 600 MW | 1.0 yrs | 69.1 |
| Greenfield (UNKNOWN175849 - ELLENDALE 345 ) | Greenfield | SD | Day County | 345 kV | 600 MW | 1.4 yrs | 68.7 |
| UNKNOWN131130 | Substation-Adjacent | SD | Brown County | 115 kV | 100 MW | 1.0 yrs | 68.2 |
| Greenfield (UNKNOWN175849 - ELLENDALE 345 ) | Greenfield | SD | Day County | 345 kV | 600 MW | 1.4 yrs | 68.2 |
| TAP159546 | Substation-Adjacent | SD | Day County | 115 kV | 100 MW | 1.0 yrs | 68.2 |
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 TAP159537 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.