TAP205581
SubstationMontana · BIG HORN COUNTY ELECTRIC COOP, INC
TAP205581 is an electric transmission substation in Montana, operated by BIG HORN COUNTY ELECTRIC COOP, INC. It is classified as sub-transmission (115 kv) and connects 3 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 |
|---|---|---|---|---|
| #71012 | 115 kV | BIG HORN COUNTY ELECTRIC COOP, INC | — | 8.8 mi |
| #71514 | 115 kV | BIG HORN COUNTY ELECTRIC COOP, INC | — | 3.4 mi |
| #74590 | 115 kV | NORTHWESTERN ENERGY LLC - (MT) | — | 0.2 mi |
Nearby datacenter candidate sites
Scored candidate sites within roughly 25 miles of TAP205581, 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 |
|---|---|---|---|---|---|---|---|
| CROSSOVER | Substation-Adjacent | MT | Big Horn County | 230 kV | 300 MW | 1.1 yrs | 74.6 |
| HARDEN | Substation-Adjacent | MT | Big Horn County | 230 kV | 300 MW | 1.1 yrs | 74.0 |
| UNKNOWN205088 | Substation-Adjacent | MT | Yellowstone County | 275 kV | 300 MW | 1.1 yrs | 72.1 |
| Greenfield (BROADVIEW - COLSTRIP) | Greenfield | MT | Treasure County | 500 kV | 1,000 MW | 1.1 yrs | 71.7 |
| Greenfield (BROADVIEW - COLSTRIP) | Greenfield | MT | Yellowstone County | 500 kV | 1,000 MW | 1.1 yrs | 71.3 |
| Greenfield (BROADVIEW - COLSTRIP) | Greenfield | MT | Treasure County | 500 kV | 1,000 MW | 1.1 yrs | 71.0 |
| UNKNOWN202648 | Substation-Adjacent | MT | Big Horn County | 115 kV | 100 MW | 1.1 yrs | 71.0 |
| UNKNOWN206858 | Substation-Adjacent | MT | Big Horn County | 115 kV | 100 MW | 1.1 yrs | 70.9 |
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 TAP205581 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.