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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