MISO–Ontario
MISO ↔ Ontario · Market seam (every AC tie between two markets)
The Michigan–Ontario ties across the St. Clair and Detroit rivers and the separate Minnesota–Ontario 115 kV connection. IESO’s Michigan and Minnesota readings are combined for this market seam; its representative marker is on the Michigan border.
Operator readings
Compare each operator’s reading at its stated time. Scheduled transfers and metered physical flow measure different things.
- As MISO reports it
- 5 MW · MISO → Ontario
Update overdue · as of Nov 9, 10:00 PM CST
- As IESO reports it
- 377 MW · Ontario → MISO
Current reading · as of Nov 10, 8:00 PM CST
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: MISO → Ontario. Below: the reverse.
- Usual direction
- Ontario → MISO in 85% of hours
15% out, 85% in, 1% idle across 578 hours
- Average
- 517 MW · Ontario → MISO
- When busy
- 1,372 MW
95th percentile of hourly flow either way
- Peak MISO → Ontario
- 420 MW
- Peak Ontario → MISO
- 1,635 MW
- Direction changes
- 51
Sources and method
Readings come from MISO and IESO 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 MISO. 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.