Ausenco carried out the design for upgrading the existing Westridge dock to safely berth 100,000 DWT oil tankers.
This bulk petroleum dock is located in Burrard Inlet near Vancouver and previously had berthing capacity for 50,000 DWT vessels.
A major feature of the upgrade was the addition of new rubber fenders and fender piles to the existing dock to absorb the increased berthing energy without overloading the existing caisson structures.
A new steel piled shore mooring and a mooring dolphin with pipe piles and tension anchors were added to safely moor the tankers. Quick release hooks were installed on the new and existing dolphins and on the existing dock.
Also included in the design were catwalks to the new dolphin and shore mooring, and an underwater retaining wall to permit dredging in front of the existing caissons. A cathodic protection system was also added.
Construction works were completed without interruptions to the operation of the dock.
At a later stage, we inspected the main dock which is supported by 3 large sheet pile caissons, assessed its current condition and presented options on renovations to increase its serviceable life.
Recommendations and various concept designs, with cost estimates, were made regarding options for rehabilitating the structure, followed by a geotechnical investigation and basic engineering design of the structural renovations.