Montana–Northwest
BPA ↔ Montana · AC transmission
The 500 kV path west from Colstrip through Garrison that carries Montana generation to the Pacific Northwest.
Operator readings
Compare each operator’s reading at its stated time. Scheduled transfers and metered physical flow measure different things.
- As BPA reports it
- 1,102 MW · Montana → BPA
Delayed publication · limit this way 1,600 MW · as of Nov 10, 12:00 AM PST
Last 30 days
Hourly readings, signed so that up is power leaving the market. Each series identifies whether it measures flow or a transfer schedule.
Above zero: BPA → Montana. Below: the reverse.
- Usual direction
- Montana → BPA in 100% of hours
0% out, 100% in, 0% idle across 705 hours
- Average
- 987 MW · Montana → BPA
- When busy
- 1,528 MW
95th percentile of hourly flow either way
- Peak BPA → Montana
- 0 MW
- Peak Montana → BPA
- 1,729 MW
- Direction changes
- 0
Hardware
Its terminals, placed from named HIFLD substations or other cited geospatial sources where available.
- Substation
- Colstrip, MT
45.8911, -106.6128 · 500 kV
- Substation
- Garrison, MT
46.5161, -112.8880 · 500 kV
Sources and method
Readings come from BPA interface readings. Each value is shown with its operator and source time; direction is normalized from that operator’s sign convention toward or away from BPA. A rating describes the equipment; an operator’s posted directional limit, when available, is a separate operating value. The map point identifies a sourced terminal or crossing where available, or a representative connection point; it does not trace the full route.