Northern Intertie
BPA ↔ British Columbia · AC transmission
BPA’s Northern Intertie combines the western Custer–Ingledow 500 kV circuits with the eastern Boundary–Nelway 230 kV connection and the normally open Boundary–Waneta 230 kV line. The marker is at Custer; the reading covers the full path.
Operator readings
Compare each operator’s reading at its stated time. Scheduled transfers and metered physical flow measure different things.
- As BPA reports it
- 683 MW · BPA → British Columbia
Current reading · limit this way 2,000 MW · as of Nov 10, 3:40 PM 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 → British Columbia. Below: the reverse.
- Usual direction
- British Columbia → BPA in 89% of hours
10% out, 89% in, 1% idle across 721 hours
- Average
- 887 MW · British Columbia → BPA
- When busy
- 1,943 MW
95th percentile of hourly flow either way
- Peak BPA → British Columbia
- 1,180 MW
- Peak British Columbia → BPA
- 2,243 MW
- Direction changes
- 27
Hardware
Its terminals, placed from named HIFLD substations or other cited geospatial sources where available.
- Substation
- Ingledow, British Columbia
In Canada, outside HIFLD's coverage
- Substation
- Custer, WA
48.9043, -122.6254 · 500 kV
- Substation
- Boundary, WA
48.9814, -117.3584 · 230 kV
- Substation
- Nelway, British Columbia
In Canada, outside HIFLD's coverage
- Substation
- Waneta (normally open), British Columbia
In Canada, outside HIFLD's coverage
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.