WATERTOWN
SubstationSouth Dakota · WAPA-- WESTERN AREA POWER ADMINISTRATION
WATERTOWN is an electric transmission substation in South Dakota, operated by WAPA-- WESTERN AREA POWER ADMINISTRATION. It is classified as high-voltage (345 kv) and connects 11 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 |
|---|---|---|---|---|
| #12164 | 345 kV | — | IN SERVICE | 44.5 mi |
| #21667 | 345 kV | — | IN SERVICE | 70.2 mi |
| #60093 | 230 kV | WAPA-- WESTERN AREA POWER ADMINISTRATION | IN SERVICE | 55.2 mi |
| #26153 | 230 kV | — | IN SERVICE | 48.5 mi |
| #36345 | 230 kV | — | IN SERVICE | 48.5 mi |
| #52348 | 230 kV | — | IN SERVICE | 28.4 mi |
| #36 | 115 kV | — | IN SERVICE | 5.5 mi |
| #26856 | 115 kV | — | IN SERVICE | 30.8 mi |
| #12192 | 115 kV | — | IN SERVICE | 44.1 mi |
| #12937 | 115 kV | — | IN SERVICE | 28.7 mi |
| #7391 | 115 kV | — | IN SERVICE | 2.7 mi |
Nearby datacenter candidate sites
Scored candidate sites within roughly 25 miles of WATERTOWN, 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 |
|---|---|---|---|---|---|---|---|
| WATERTOWN | Substation-Adjacent | SD | Codington County | 345 kV | 600 MW | 1.0 yrs | 70.0 |
| UNKNOWN175855 | Substation-Adjacent | SD | Grant County | 230 kV | 300 MW | 1.0 yrs | 69.1 |
| Greenfield (UNKNOWN175849 - ELLENDALE 345 ) | Greenfield | SD | Grant County | 345 kV | 600 MW | 1.4 yrs | 68.2 |
| Greenfield (UNKNOWN175849 - ELLENDALE 345 ) | Greenfield | SD | Day County | 345 kV | 600 MW | 1.4 yrs | 67.6 |
| UNKNOWN175856 | Substation-Adjacent | SD | Codington County | 230 kV | 300 MW | 1.0 yrs | 67.0 |
| UNKNOWN131211 | Substation-Adjacent | SD | Brookings County | 115 kV | 100 MW | 1.0 yrs | 66.8 |
| Greenfield (WATERTOWN - WHITE) | Greenfield | SD | Deuel County | 345 kV | 600 MW | 1.0 yrs | 66.3 |
| Greenfield (WATERTOWN - WHITE) | Greenfield | SD | Deuel County | 345 kV | 600 MW | 1.0 yrs | 66.3 |
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 WATERTOWN 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.