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Burloak Water Purification Plant - Intake Tunnel Dean Construction Co Ltd was retained by C&M MacNally Engineering Corp for the installation of the offshore raw water intake pipeline and intermediate riser shaft for the intake tunnel. The marine work consisted of:Drilling a 3.5 m Ø shaft through bedrock and installation of a vertical riser to connect the intake tunnel with the lakebed intake pipeline. Drilling and blasting from a Jack-up barge a marine trench 1060m long and 4m wide x 4m deep to accomodate the installation of 1.8m dia concrete intake pipe. Fabrication and installation of a reinforced intake structure.All in water activities were assisted by accurate global positioning systems and a Clamvision computer software specialized in marine plant positioning for underwater excavation. The work was carried out under very strict environmental control and monitoring of: water turbidity, disruption of fish habitat, in water work window, blasting impact on aquatic life , etc.
All blasting activities were performed inside an air bubbling curtain in order provide underwater blast protection and to reduce the impact on aquatic life.
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