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Strabag Secures Mid-Halton Outfall Tunnel Contract



Strabag announced that is has secured a $79 million (CA) contract to build the Mid-Halton Outfall Tunnel. The project centers on the excavation of two 60-m deep shafts and a 6.3-km rock-bored tunnel that is designed to carry treated effluent from the water treatment plant in Oakville into Lake Ontario.

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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 4.1 km and a 2.2-km reach will be built offshore, ending in a diffuser array beneath Lake Ontario.

A tunnel boring machine with an excavation diameter of 3.6 m will drill mainly through layers of shale and limestone. Construction is set to begin in July and is expected to be completed within 39 months.



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