Seaspan | Load-Out Pier Project
About the Project
As part of the Seaspan Shipyard Modernization Program, Seaspan constructed a 53.56 m long x 31.8 m wide concrete load-out pier covering 1,643 m2 (17,685 sq. ft. ) through the infilling of a caisson and sheet pile wall structure. Due to proposed changes to the construction and footprint of the load-out pier, Seaspan submitted an application to amend approved project permit (PP 2012-088).
Specific construction activities included:
- Construction of an approximately 32 m wide x 50 m long concrete load-out pier with a proposed footprint of approximately 1,720 m² (18,514 sq. ft.);
- Installing temporary four-sided sheetpile wall that extends approximately 3 m (10 ft.) beyond the perimeter of the final pier caisson footprint. The sheetpile wall enclosure will contain water and sediment during dredging activities;
- Installing timber piles within the sheetpile wall enclosure to densify the seabed directly beneath the caisson placement area, as well as extending 3 m (10 ft.) beyond the berth face to densify the temporary sheetpile enclosure;
- Once the timber piles have been driven to the desired depth, the piles will be cut at the seabed elevation using divers as required;
- A 1 m (3 ft.) thick mattress rock layer will be placed over the timber densification piles inside the sheetpile enclosure, with pre-cast concrete caissons sunk over the rock mattress followed by fill material; and
- Upon completion of the fill material placement and removal of the temporary sheet pile walls, rip-rap material will be placed along the side-slope area to retain the inner fill material and protect against wave-action.
For questions regarding this project permit, please contact the Planning Department at [email protected].