MILL CREEK GENERATING STATION
SubstationMontana · NORTHWESTERN ENERGY LLC - (MT)
MILL CREEK GENERATING STATION is an electric transmission substation in Montana, operated by NORTHWESTERN ENERGY LLC - (MT). It is classified as high-voltage (230 kv) and connects 10 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 |
|---|---|---|---|---|
| #73283 | 230 kV | NORTHWESTERN ENERGY LLC - (MT) | — | 0.1 mi |
| #68468 | 230 kV | NORTHWESTERN ENERGY LLC - (MT) | — | 156.4 mi |
| #68472 | 230 kV | NORTHWESTERN ENERGY LLC - (MT) | — | 71.7 mi |
| #69355 | 230 kV | NORTHWESTERN ENERGY LLC - (MT) | — | 92.7 mi |
| #68467 | 230 kV | NORTHWESTERN ENERGY LLC - (MT) | — | 30.5 mi |
| #69901 | 115 kV | VIGILANTE ELECTRIC COOP, INC | — | 63.8 mi |
| #69899 | 115 kV | NORTHWESTERN ENERGY LLC - (MT) | — | 14.0 mi |
| #69900 | 115 kV | NORTHWESTERN ENERGY LLC - (MT) | — | 14.2 mi |
| #69262 | 115 kV | NORTHWESTERN ENERGY LLC - (MT) | — | 0.5 mi |
| #69332 | 115 kV | NORTHWESTERN ENERGY LLC - (MT) | — | 86.4 mi |
Nearby datacenter candidate sites
Scored candidate sites within roughly 25 miles of MILL CREEK GENERATING STATION, 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 |
|---|---|---|---|---|---|---|---|
| Greenfield (TAFT - GARRISON) | Greenfield | MT | Granite County | 500 kV | 1,000 MW | 1.1 yrs | 72.7 |
| Greenfield (BROADVIEW - GARRISON) | Greenfield | MT | Jefferson County | 500 kV | 1,000 MW | 1.1 yrs | 71.8 |
| Greenfield (BROADVIEW - GARRISON) | Greenfield | MT | Powell County | 500 kV | 1,000 MW | 1.1 yrs | 71.5 |
| DAVE GATES GENERATING STATION | Substation-Adjacent | MT | Deer Lodge County | 230 kV | 300 MW | 1.1 yrs | 71.3 |
| UNKNOWN205103 | Substation-Adjacent | MT | Silver Bow County | 115 kV | 100 MW | 1.1 yrs | 71.2 |
| Greenfield (TAFT - GARRISON) | Greenfield | MT | Granite County | 500 kV | 1,000 MW | 1.1 yrs | 71.0 |
| BASIN CREEK PLANT | Substation-Adjacent | MT | Silver Bow County | 161 kV | 100 MW | 1.1 yrs | 71.0 |
| TAP204573 | Substation-Adjacent | MT | Silver Bow County | 115 kV | 100 MW | 1.1 yrs | 70.7 |
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 MILL CREEK GENERATING STATION 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.