Electric Substations in South Dakota
284 catalogued substations in South Dakota, with the highest-voltage facilities listed first. Each substation profile shows voltage class, operator, connected transmission lines, and the datacenter candidate sites closest to it.
| Substation | Max voltage | Connected lines | Operator |
|---|---|---|---|
| DEER CREEK STATION | 345 kV | 2 | — |
| LYON COUNTY | 345 kV | 1 | OTTER TAIL POWER CO |
| SPLIT ROCK | 345 kV | 13 | MIDAMERICAN ENERGY CO |
| BIG STONE SOUTH | 345 kV | 5 | OTTER TAIL COMPANY |
| SIOUX CITY | 345 kV | 1 | MIDAMERICAN ENERGY CO |
| GROTON | 345 kV | 3 | — |
| FORT THOMPSON | 345 kV | 15 | NORTHWESTERN ENERGY - (SD) |
| WATERTOWN | 345 kV | 11 | WAPA-- WESTERN AREA POWER ADMINISTRATION |
| WHITE | 345 kV | 7 | OTTER TAIL POWER CO |
| BROOKINGS COUNTY | 345 kV | 7 | OTTER TAIL POWER CO |
| BISON | 230 kV | 3 | WAPA-- WESTERN AREA POWER ADMINISTRATION |
| NEW UNDERWOOD | 230 kV | 7 | WAPA-- WESTERN AREA POWER ADMINISTRATION |
| YELLOW CREEK | 230 kV | 1 | BLACK HILLS POWER, INC. |
| SULLY BUTTES | 230 kV | 2 | WAPA-- WESTERN AREA POWER ADMINISTRATION |
| MAURINE | 230 kV | 4 | WAPA-- WESTERN AREA POWER ADMINISTRATION |
| PHILIP | 230 kV | 4 | WAPA-- WESTERN AREA POWER ADMINISTRATION |
| WAYSIDE | 230 kV | 3 | NEBRASKA PUBLIC POWER DISTRICT |
| LANGE | 230 kV | 2 | BLACK HILLS POWER, INC. |
| WEST HILL | 230 kV | 1 | BLACK HILLS POWER, INC. |
| TAP167694 | 230 kV | 3 | — |
| LOOKOUT | 230 kV | 2 | BLACK HILLS POWER, INC. |
| VT HANLON | 230 kV | 2 | NORTHWESTERN ENERGY - (SD) |
| OAHE | 230 kV | 12 | NORTHWESTERN ENERGY - (SD) |
| HURON | 230 kV | 8 | NORTHWESTERN ENERGY - (SD) |
| RAPID CITY DC TIE | 230 kV | 2 | — |
| SOUTH RAPID CITY | 230 kV | 3 | BLACK HILLS POWER, INC. |
| STEGALL | 230 kV | 2 | BLACK HILLS POWER, INC. |
| WHITLOCK | 230 kV | 2 | MONTANA-DAKOTA UTILITIES CO. |
| BROADLAND | 230 kV | 1 | — |
| SOUTH DAKOTA WIND ENERGY CENTE | 230 kV | 1 | — |
| BLAIR | 230 kV | 3 | WAPA-- WESTERN AREA POWER ADMINISTRATION |
| LAKE PLATTE | 230 kV | 2 | WAPA-- WESTERN AREA POWER ADMINISTRATION |
| TWIN CHURCH | 230 kV | 1 | — |
| FORT RANDALL | 230 kV | 10 | NORTHWESTERN ENERGY - (SD) |
| BIG STONE | 230 kV | 7 | OTTER TAIL POWER CO |
| UTICA JUNCTION | 230 kV | 9 | NORTHWESTERN ENERGY - (SD) |
| GLENHAM | 230 kV | 3 | MONTANA-DAKOTA UTILITIES CO. |
| VIRGIL FODNESS | 230 kV | 4 | — |
| SIOUX FALLS | 230 kV | 10 | NORTHERN STATES POWER CO - MINNESOTA |
| LAWRENCE | 115 kV | 4 | NORTHERN STATES POWER CO - MINNESOTA |
| TAP159427 | 115 kV | 3 | — |
| TAP159554 | 115 kV | 3 | NORTHWESTERN ENERGY |
| TAP138634 | 115 kV | 3 | OTTER TAIL POWER CO |
| GAVINS POINT | 115 kV | 4 | WAPA-- WESTERN AREA POWER ADMINISTRATION |
| TAP138060 | 115 kV | 3 | — |
| TAP138632 | 115 kV | 3 | OTTER TAIL POWER CO |
| TAP137997 | 115 kV | 3 | — |
| TAP144187 | 115 kV | 3 | NORTHERN STATES POWER CO - MINNESOTA |
| TAP137994 | 115 kV | 3 | — |
| TAP138041 | 115 kV | 3 | NORTHERN STATES POWER CO - MINNESOTA |
| TAP144236 | 115 kV | 3 | KBR RURAL PUBLIC POWER DISTRICT |
| TAP138046 | 115 kV | 3 | NORTHERN STATES POWER CO - MINNESOTA |
| TAP138044 | 115 kV | 3 | — |
| CORSON | 115 kV | 2 | NORTHERN STATES POWER CO - MINNESOTA |
| TAP155849 | 115 kV | 2 | WAPA-- WESTERN AREA POWER ADMINISTRATION |
| TAP159616 | 115 kV | 3 | NORTHWESTERN ENERGY |
| TAP144223 | 115 kV | 3 | — |
| TAP144163 | 115 kV | 3 | — |
| TAP159546 | 115 kV | 3 | NORTHWESTERN ENERGY |
| TAP135062 | 115 kV | 3 | OTTER TAIL POWER CO |
See datacenter candidate sites in South Dakota →
Dataset updated . Screening estimates derived from public data sources.
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This page shows a public slice of the GridCensus dataset for substations in 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.