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 NEWS: Please click here for construction update.

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.

Our team began construction in March 2018 and work will continue to be staged over approximately one year. View the latest construction updates on the project

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

Timeline: 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

  • MARCH2018
  • Start of construction

Project Approvals

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

Project Approvals
Public Consultation

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

Public Consultation
Maps & Diagrams

View maps and diagrams related to this project.

Maps & Diagrams
Construction Updates

Get the latest updates as construction progresses for the project.

Construction Updates

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