MIDLAND
SubstationSouth Dakota · WAPA-- WESTERN AREA POWER ADMINISTRATION
MIDLAND is an electric transmission substation in South Dakota, operated by WAPA-- WESTERN AREA POWER ADMINISTRATION. It is classified as sub-transmission (115 kv) and connects 2 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 |
|---|---|---|---|---|
| #2817 | 115 kV | WAPA-- WESTERN AREA POWER ADMINISTRATION | IN SERVICE | 41.5 mi |
| #12690 | 115 kV | WEST RIVER ELECTRIC ASSN INC | IN SERVICE | 27.4 mi |
Nearby datacenter candidate sites
Scored candidate sites within roughly 25 miles of MIDLAND, 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 |
|---|---|---|---|---|---|---|---|
| UNKNOWN204132 | Substation-Adjacent | SD | Haakon County | 230 kV | 300 MW | 1.0 yrs | 69.3 |
| Greenfield (OAHE - UNKNOWN204132) | Greenfield | SD | Haakon County | 230 kV | 300 MW | 1.0 yrs | 63.2 |
| Greenfield (OAHE - UNKNOWN204132) | Greenfield | SD | Haakon County | 230 kV | 300 MW | 1.0 yrs | 63.1 |
| PHILIP | Substation-Adjacent | SD | Jackson County | 230 kV | 300 MW | 1.0 yrs | 63.1 |
| Greenfield (OAHE - UNKNOWN204132) | Greenfield | SD | Haakon County | 230 kV | 300 MW | 1.0 yrs | 62.4 |
| Greenfield (NEW UNDERWOOD - UNKNOWN204132) | Greenfield | SD | Haakon County | 230 kV | 300 MW | 1.0 yrs | 62.2 |
| Greenfield (PHILIP - MIDLAND) | Greenfield | SD | Haakon County | 115 kV | 100 MW | 1.0 yrs | 60.1 |
| Greenfield (UNKNOWN131230 - PHILIP) | Greenfield | SD | Haakon County | 115 kV | 100 MW | 1.0 yrs | 60.1 |
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 MIDLAND 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.