Toronto Hydro-Electric System (Toronto Hydro) owns and operates an electricity distribution system, which delivers electricity to approximately 703,000 customers located in the city of Toronto. It is the largest municipal electricity distribution company in Canada and distributes approximately 19% of the electricity consumed in Ontario.

Toronto is a densely populated city of 2.5 million residents and is undergoing urban renewal. Toronto Hydro initiated a multi-year, capital program designed to keep up with the electricity demands of this growing metropolis.

Tetra Tech (Wardrop) is working with Toronto Hydro’s contractors on this program. These projects will improve service and reliability, reduce power outages, facilitate future growth, and enhance safety. Our staff provides design, permitting and construction services for a variety of electrical infrastructure projects.

To date, Tetra Tech has provided the following services:

• Design for upgrade of existing overhead switching to include remote operated SCADA Switches
• Design for replacement of failing direct buried primary cable, voltage conversion from 13.8 kV to 27.6 kV, replacement of transformers and pad-mounted switchgear upgrades, and modification of the distribution loop for reliability, efficiency and balance of loading
• Design for the relocation of existing overhead and underground facilities
• Reconstruction for full replacement and voltage conversion from 4 kV to 27.6 kV primary supply (overhead)
• Design for replacement of all existing high voltage cables (underground) in a 200-lot subdivision