Progressive natural sedimentation upstream of the River Tawe Barrage in Swansea results in a gradual loss of depth for the Marina located in the sheltered waters above the barrage.
Removal of the material is required every couple of years to restore safe navigation in the river.
Dredging is carried out in the winter months when impacts on the local environment and boat users are minimised. The preferred method of dredging used to date has been Water Injection Dredging (WID).
Van Oord’s purpose built WID vessel ‘Odin’ was working in the approaches to the upstream lock gates. The volume of sediment removed this year was approximately 12,000 m³. The works were carried out under a Marine Licence issued by National Resources Wales.
Dredging started of the 30th January and was successfully completed on 14th February. The work required very close co-operation between the various parties to ensure that the many vessels moored in the Marina could be moved out of the area to be dredged in a defined sequence.
All aspects of the work, including planning, licensing, surveys, contract documentation and on-site supervision were carried out by the Anthony D Bates Partnership (ADBP) LLP on behalf of City and County of Swansea.