IESO Seeks Input on RFP for 3rd Toronto Transmission Line
The Toronto Third Line will span 65 kilometers from the Bowmanville substation to an HVDC injection point at the Hearn substation. | IESO
Feb 1, 2026
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IESO is seeking stakeholder input on its first competitive transmission solicitation: a $1.5 billion HVDC line under Lake Ontario that will become the third major supply line for Toronto.
