Toronto Basement Flooding Protection Program

To help reduce the risk of flooding, the City of Toronto established a multi-year program to improve to the sewer system and overland drainage routes across the City. In 2012, the City of Toronto, requested that the lead design engineering firms retain T2 Utility Engineers to provide Subsurface Utility Engineering (SUE) services based on the quality of our previous SUE work for the City.

Each year since 2012, our professionals have completed more than 60km of subsurface utility investigations across residential and high traffic arterials roads. Our teams provide the utility infrastructure information critical for the design of the new wastewater system with reduced risk by locating and designating the existing underground utilities and other anomalies.

Over the course of the project, T2ue has provided comprehensive Subsurface Utility Engineering including designating, Ground Penetrating Radar, LiDAR chamber scans, test holes, and CCTV sewer investigations, all completed in accordance with the ASCE 38 Standard. Deliverables are provided in the MicroStation format, allowing the data to be easily integrated into the City’s documents.

The Basement Flooding Program has been conducted in phases. First are the preliminary design phases. Phase 4 is now being complete, with T2ue providing comprehensive SUE services for each of these phases. Following preliminary design, the City tenders each Phase for detailed design plans. The T2ue team has provided additional SUE services for these phases as well. Preliminary design phase 5 is anticipated to be released in 2022 identifying additional areas across the Greater Toronto Area that require drainage improvements.


Jacobs / WSP Canada / Parsons / Hatch / CIMA+ / TMIG

Project Owner:

City of Toronto







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