Ontario to Fast-Track 290-Kilometre Transmission Line Between Barrie and Sudbury

Ontario will accelerate approvals for a new 500-kilovolt transmission line running about 290 kilometres between the Hanmer transformer station in Greater Sudbury and the Essa transformer station near Barrie. The province designated the project a priority in February.

Hydro One expects to begin construction in 2029 and complete the line by 2032. The line is intended to meet rising electricity demand in northern Ontario, support northern industries, and strengthen the power grid. Electricity demand in the region is forecast to grow by 81 per cent by 2050, according to the province.

The Independent Electricity System Operator has projected demand increases ranging from 38 per cent to 98 per cent by 2050 depending on decarbonization and trade factors.

One will conduct a Class Environmental Assessment for Transmission Facilities that includes public and community input. The utility plans to issue a notice of commencement later this year and hold a second round of open houses to share route alternatives.

Environmental consultants will carry out field studies on vegetation, wildlife, water features, and other natural areas through 2026 and 2027. A preferred route is expected to be selected in 2027 after assessment of technical, socio-economic, and natural environment considerations.

Hydro One said the process will identify potential impacts and develop mitigation measures. A draft environmental study report will be released for public review and comment.

Northwatch project co-ordinator Brennain Lloyd said the organization has not yet studied the full corridor in detail but noted that the broad study area crosses largely undeveloped land. She said the Class Environmental Assessment generally has limited potential for public engagement to affect decisions.

Lloyd added that fast-tracking major infrastructure could reduce oversight. Peter Beckett, professor emeritus of reclamation, restoration and wetland ecology at Laurentian University, said new lines should follow existing corridors where possible instead of cutting through undisturbed forest.