This construction has been completed and the following information is provided for archival purposes.
This site was last updated December 11, 2012
Construction Start Date : April 2009
Revised Expected Completion Date: March 2013
Built in the late sixties and early seventies, the Mid-Toronto Interceptor (MTI) is an existing tunnel system stretching from High Park to the Ashbridges Bay Treatment Plant. The MTI collects sewer flows from across Toronto including from local municipal combined sewers, flows diverted from two other interceptors (High Level Interceptor HLI - and Low Level Interceptor LLI) as well as sludge from the Humber Treatment Plant. The MTI drains to the Ashbridges Bay Treatment Plant where the sewage is treated.
Flows are controlled by sluice gates (which act like valves) throughout the system. Gates are located in underground chambers along the MTI and along branches connecting to the HLI and LLI. Most chambers have above-ground control panels (enclosed in locked grey cabinets).
It is the intent of this project to refurbish some of the original sluice gates and associated equipment and locally automate the operation of the gates. This will improve and simplify the running of the system. Mechanical and electrical upgrades and retrofitting will take place in eleven of the chambers on the MTI system. Instrumentation located both underground and in the above-ground panels will be installed, repaired or replaced.
Chamber upgrades began in April 2009. Construction crews will typically be on-site most days in compliance with noise by-laws, and sites will be cleared nightly. Work at some sites will take place at night to reduce traffic delays.
The eleven chambers involved in this project are shown on the map below.
- West side of Parkside Drive, 200m south of Bloor Street West
- North side of Harrison Street, West of Roxton Road
- East side of Strachan Avenue, North of King Street West
- East side of Spadina Avenue, South of Dundas Street West
- East side of Simcoe Street, North of Adelaide Street West
- Front Street West, East of Simcoe Street
- East side of Victoria Street, South of Gerrard Street East
- Scott Street at Front Street East
- South side of Rosedale Valley Road, West of Sherbourne Street bridge
- East side of Hiawatha Road, South of Gerrard Street East
- East side of Rhodes Avenue, 110m south of Gerrard Street East
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Kirk Allan, P.Eng.
Senior Project Engineer
City of Toronto