Rehabilitating Three Different Trunk Sewers under One Contract

As part of Toronto Water’s proactive asset management program, numerous sewers are planned to be rehabilitated using trenchless technologies. The City of Toronto opted to bundle projects to include two or more site locations. These bundled projects included rehabilitation of sanitary trunk sewers (STS) of a variety of pipe sizes and materials, each with unique project site challenges. Due to individual site constraints, the bundled projects would be delivered over multiple years, sequentially. This paper discusses each of the bundled projects of Mendota STS, Queensway STS, and Long Branch STS, which was tendered in fall 2019 with anticipated completion at the end of 2021. This project experienced unanticipated benefits and challenges due to the COVID-19 pandemic and extreme weather events, such as lower traffic and transit volumes and material shortages. Construction began in 2020 and was completed in 2022.