Boring begins on Coxwell Bypass Tunnel

The first stage of a major project for Toronto’s waterways has commenced with the launch of tunnel boring machines (TBM).

The Coxwell Bypass Tunnel is the first of three phases for the new 22 km Don River and Central Waterfront Wet Weather Flow System.

Construction began in 2018 with two of the five major shafts already complete and excavation well underway for the remaining three major shafts.

Toronto Mayor John Tory said the project will keep the city’s lake and waterfront both clean and safe for generations to come.

“The first stage of these projects is the Coxwell Bypass Tunnel, which will see improvements to the aquatic habitat for fish and other wildlife, support for the revitalisation efforts along the central waterfront and create greater opportunities for residents to enjoy water activities,” said Mr Tory.

“Once this work is complete, it will capture and store combined sewer overflows – a mix of rainwater and sewage – during significant rainfalls rather than overflowing into our waterways.”

The TBM is approximately 7 m in diameter and 115 m long and will install at least 20 m of tunnel per day.

It is anticipated that boring will finish by 2024.

Over the next 25 years, the City of Toronto’s Wet Weather Flow Master Plan (WWFMP) will work on five major projects valued at more than CA$3 million (US$2.28 million).

The five projects are the Don River and Central Waterfront Wet Weather Flow System; the Ashbridges Bay Landform Project/Site of Future High-Rate Treatment Facility; a new integrated pumping facility; a new outfall; and new ultraviolet disinfection wastewater treatment system.

For more information visit the City of Toronto website.

If you have news you would like featured in Trenchless International contact Managing Editor Chloe Jenkins at 

Show more

Related articles

Back to top button