Niagara Tunnel Facility Project

Sub-contract to Dufferin Construction Company. Work includes construction of 1000 m of new precast concrete acceleration & shore approach walls, demolition of the existing acceleration wall, excavation of a 90 m long x 20 m wide x 4.5 m deep intake channel by drilling and blasting, installation of an intake cofferdam, with interlocking SSP circular cells and a grout curtain and removal of the intake cofferdam.