The project centres on the excavation of two 60m-deep shafts and a 6.3km rock-bored tunnel that is designed to carry treated effluent from the water treatment plant in Oakville into Lake Ontario.
Strabag first entered the Canadian market in 2005 and since then most of its contracts there have involved the construction of tunnels and shafts.
The Mid-Halton Outfall Tunnel will consist of two sections. The onshore section will run 4.1km and 2.2km reach will be built offshore, ending in a diffuser array beneath Lake Ontario.
A tunnel boring machine with an excavation diameter of 3.6m will drill mainly through layers of shale and limestone. Construction is set to begin this month and is expected to be completed within 39 months.