ACHIEVEMENTS
Location
Saint John, New Brunswick
Client
Port Saint John
Delivery
2020 2021
Contract type
Lump sum, in consortium
Assignment
Perform dredging. Construct and install eight con- crete caissons.
Challenges
Work in very deep water, with some of the world s highest tides, a strong current and difficult weather conditions.
Conduct underwater blasting.
Avoid contaminating water in the harbour when blasting, dredging and moving debris.
Solutions
Build most of the floating caissons, with a portion of them on a submersible barge.
Use 513,000 tonnes of granular material to build two berms and stabilize the caissons.
Implement several environmental impact mitiga- tion measures, including a bubble-curtain system.
Modernizing the terminals at a growing port
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