SPLIT ROCK
SubstationSouth Dakota · MIDAMERICAN ENERGY CO
SPLIT ROCK is an electric transmission substation in South Dakota, operated by MIDAMERICAN ENERGY CO. It is classified as high-voltage (345 kv) and connects 13 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 |
|---|---|---|---|---|
| #12161 | 345 kV | — | IN SERVICE | 59.1 mi |
| #60218 | 345 kV | — | IN SERVICE | 52.1 mi |
| #32249 | 345 kV | MIDAMERICAN ENERGY CO | IN SERVICE | 83.7 mi |
| #32842 | 230 kV | NORTHERN STATES POWER CO - MINNESOTA | IN SERVICE | 1.0 mi |
| #13523 | 161 kV | — | IN SERVICE | 14.6 mi |
| #13522 | 115 kV | NORTHERN STATES POWER CO - MINNESOTA | IN SERVICE | 2.2 mi |
| #13521 | 115 kV | NORTHERN STATES POWER CO - MINNESOTA | — | 0.3 mi |
| #17266 | 115 kV | — | IN SERVICE | 8.8 mi |
| #31043 | 115 kV | — | IN SERVICE | 2.2 mi |
| #13512 | 115 kV | NORTHERN STATES POWER CO - MINNESOTA | IN SERVICE | 2.6 mi |
| #13511 | 115 kV | NORTHERN STATES POWER CO - MINNESOTA | IN SERVICE | 17.3 mi |
| #13509 | 115 kV | NORTHERN STATES POWER CO - MINNESOTA | IN SERVICE | 0.2 mi |
Nearby datacenter candidate sites
Scored candidate sites within roughly 25 miles of SPLIT ROCK, 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 |
|---|---|---|---|---|---|---|---|
| SIOUX FALLS | Substation-Adjacent | SD | Minnehaha County | 230 kV | 300 MW | 1.0 yrs | 76.3 |
| UNKNOWN130479 | Substation-Adjacent | IA | Lyon County | 230 kV | 300 MW | 1.0 yrs | 75.0 |
| VIRGIL FODNESS | Substation-Adjacent | SD | Lincoln County | 230 kV | 300 MW | 1.0 yrs | 74.3 |
| UNKNOWN158869 | Substation-Adjacent | SD | Minnehaha County | 115 kV | 100 MW | 1.0 yrs | 73.1 |
| UNKNOWN130480 | Substation-Adjacent | IA | Lyon County | 230 kV | 300 MW | 1.0 yrs | 72.9 |
| UNKNOWN131291 | Substation-Adjacent | SD | Lincoln County | 115 kV | 100 MW | 1.0 yrs | 72.8 |
| UNKNOWN130478 | Substation-Adjacent | IA | Lyon County | 115 kV | 100 MW | 1.0 yrs | 72.4 |
| UNKNOWN131288 | Substation-Adjacent | SD | Minnehaha County | 115 kV | 100 MW | 1.0 yrs | 71.8 |
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 SPLIT ROCK 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.