Scour protection to Berth A and Berth B, for Transnet, 2023

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Marine Project

Scour protection to Berth A and Berth B, for Transnet, 2023

The Project Scope

During May and December 2023 Stefanutti Stocks’ Coastal Region undertook the scour protection to Berth A and Berth B, for Transnet, as the quay wall that berths cruise liners, had over time been undermined and scoured.

The project included dredging and placing the seabed to the design level. A double layer of A10 Geotextile was placed, followed by a 1 000mm layer of armour rock, that forms a barrier to stop future scouring from prop wash and side thrusters. The voids (250m3) below the quay wall were filled with concrete, and this was completed 11 meters beneath the water.

The works were completed using a 36m x 19m barge with an 80ton Long Reach Excavator (LRE) secured to it. To enable the underwater works to be completed the LRE was fitted with a dig system GPS, which together with post multi-beam surveys was the only way to “view” the works.

The armour rock was loaded into a 6m3 skip before being lowered into the water by a 135ton Crawler Crane.

During the contract Stefanutti Stocks teams worked two twelve hour shifts, Monday to Friday, as well as a shift on Saturday.

The project was successfully completed, in time for the MSC Splendida to be berthed on 22 November 2023, ready for the start of the Cruise Season.

Customer feedback

Stefanutti Stocks: Marine Contracting

excellence in execution