COLSTRIP
SubstationMontana · MID-YELLOWSTONE ELEC COOP INC
COLSTRIP is an electric transmission substation in Montana, operated by MID-YELLOWSTONE ELEC COOP INC. It is classified as extra-high-voltage (500 kv) and connects 12 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 |
|---|---|---|---|---|
| #67241 | 500 kV | NORTHWESTERN ENERGY LLC - (MT) | IN SERVICE | 115.8 mi |
| #67242 | 500 kV | NORTHWESTERN ENERGY LLC - (MT) | IN SERVICE | 112.4 mi |
| #68459 | 230 kV | NORTHWESTERN ENERGY LLC - (MT) | — | 50.0 mi |
| #69962 | 138 kV | TONGUE RIVER ELECTRIC COOP INC | — | 0.5 mi |
| #69963 | 138 kV | TONGUE RIVER ELECTRIC COOP INC | — | 0.5 mi |
| #69964 | 138 kV | TONGUE RIVER ELECTRIC COOP INC | — | 0.5 mi |
| #69965 | 138 kV | TONGUE RIVER ELECTRIC COOP INC | — | 0.5 mi |
| #69966 | 138 kV | TONGUE RIVER ELECTRIC COOP INC | — | 0.6 mi |
| #69967 | 138 kV | TONGUE RIVER ELECTRIC COOP INC | — | 0.7 mi |
| #70997 | 115 kV | TONGUE RIVER ELECTRIC COOP INC | — | 3.4 mi |
| #70998 | 115 kV | TONGUE RIVER ELECTRIC COOP INC | — | 4.5 mi |
| #70999 | 115 kV | MID-YELLOWSTONE ELEC COOP INC | — | 4.4 mi |
Nearby datacenter candidate sites
Scored candidate sites within roughly 25 miles of COLSTRIP, 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 |
|---|---|---|---|---|---|---|---|
| COLSTRIP | Substation-Adjacent | MT | Rosebud County | 500 kV | 1,000 MW | 1.1 yrs | 80.4 |
| Greenfield (BROADVIEW - COLSTRIP) | Greenfield | MT | Rosebud County | 500 kV | 1,000 MW | 1.1 yrs | 77.2 |
| Greenfield (BROADVIEW - COLSTRIP) | Greenfield | MT | Rosebud County | 500 kV | 1,000 MW | 1.1 yrs | 75.6 |
| Greenfield (BROADVIEW - COLSTRIP) | Greenfield | MT | Rosebud County | 500 kV | 1,000 MW | 1.1 yrs | 75.5 |
| Greenfield (BROADVIEW - COLSTRIP) | Greenfield | MT | Rosebud County | 500 kV | 1,000 MW | 1.1 yrs | 75.1 |
| Greenfield (BROADVIEW - COLSTRIP) | Greenfield | MT | Rosebud County | 500 kV | 1,000 MW | 1.1 yrs | 74.7 |
| UNKNOWN205569 | Substation-Adjacent | MT | Rosebud County | 115 kV | 100 MW | 1.1 yrs | 74.1 |
| Greenfield (BROADVIEW - COLSTRIP) | Greenfield | MT | Rosebud County | 500 kV | 1,000 MW | 1.1 yrs | 73.7 |
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 COLSTRIP substation, Montana. 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.