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Project Overview

Hydro One is making important upgrades to critical transmission infrastructure that serves Toronto’s central and east end areas.

The equipment being replaced was built in the 1960s and has reached its end of life. These upgrades will ensure a reliable, strong and modernized supply of power for Toronto Hydro customers.

Hydro One’s Leaside to Main project involves replacing two sections of aging underground cable and replacing overhead shield wire, which protects our equipment from lightning. In addition, our forestry team has some routine vegetation maintenance planned in the same area.

Scheduled to begin in February, work for this project will be staged over approximately one year.

We invite you to learn more about the work happening in your neighbourhood at one of our upcoming Community Open Houses in the new year. View meeting details here.

image of Transmission towers in a corridor strung with high-voltage powerlines


Public and Stakeholder Consultation
  • JAN2016
  • Class Environmental Assessment conducted, including public consultation

  • Jan2017
  • Final Environmental Study Report (ESR) filed with the Ministry of the Environment and Climate Change

  • JAN
  • Pre-construction Community Open Houses

  • FEB2018
  • Start of construction

A table with project documents

Project Approvals

Learn more about the work we have completed to ensure provincial approval for this project.

Learn More
A happy family in front of a house

Public Consultation

Learn about upcoming Open Houses and the Public Information Centres (PICs) we conducted to support this project.

Learn More
Maps and diagrams sit on top of a table

Maps and Diagrams

View maps and diagrams related to this project.

View Maps and Diagrams

Contact Us


For more information or to be added to the project contact list, please contact:


Dana Gardner
Community Relations
Hydro One Networks Inc.

Tel: 416-345-6799 or 1-877-345-6799

Fax: 416-345-6984