Alberta–British Columbia intertie
AESO ↔ British Columbia · AC transmission
The 500 kV line from Langdon, east of Calgary, to BC Hydro at Cranbrook, with two smaller 138 kV circuits beside it: Alberta's main tie to the rest of the Western Interconnection.
What it is carrying
Each operator's own reading, turned into a direction. Where both markets publish the tie, the two should agree.
- As AESO reports it
- 261 MW · AESO → British Columbia
as of Oct 10, 11:34 AM MDT
Last 30 days
Hourly flow, signed so that up is power leaving the market.
Above zero: AESO → British Columbia. Below: the reverse.
- Usual direction
- AESO → British Columbia in 82% of hours
82% out, 17% in, 2% idle across 721 hours
- Average
- 211 MW · AESO → British Columbia
- When busy
- 860 MW
95th percentile of hourly flow either way
- Peak AESO → British Columbia
- 959 MW
- Peak British Columbia → AESO
- 476 MW
- Direction changes
- 38
Hardware
Its terminals, placed from named HIFLD substations or other cited geospatial sources where available.
- Substation
- Langdon, Alberta
In Canada, outside HIFLD's coverage
- Substation
- Cranbrook, British Columbia
In Canada, outside HIFLD's coverage
Sources and method
Flow comes from AESO 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 AESO. 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.