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Dewatering – On Schedule, On Time, On Budget


With the construction of two residential towers in the Yorkville area of downtown Toronto, an Aquatech client was responsible for constructing a five-level underground parking structure. This amounted to nearly 7 metres metres below the watertable in the Thorncliffe Aquifer. Endeavouring to maintain an aggressive project schedule, dewatering was initiated in numerous phases as the shoring and excavation contractors, along with the entire project team, worked in close collaboration. Utilizing a dual stage vacuum wellpoint system installed around the perimeter of the site allowed the team to lower the phreatic surface to construct the raft slab foundation system and parking structure. This was, in fact, the largest concrete poured raft slab foundation in Canada, and the work was ultimately delivered ahead of schedule thanks to the excellent site coordination and groundwater control.