Charlottetown Wave Attenuator

THE PROBLEM

The Charlottetown Yacht Club wanted to anchor a floating precast concrete wave attenuator in front of their newly relocated yacht club to provide shelter against wave action. The problem with using normal concrete or steel ballast moorings was that the water was too shallow and would pose a threat to navigational traffic. The harbour bottom was also too soft to support the weight of ballast moorings which would probably either settle over time or move out of position. The problem was further complicated by the underlying soil conditions which were comprised of over 50 feet of very soft marine silt.

THE SOLUTION

The MacLean-Dixie Helical Mooring System was chosen for its ability to provide the necessary anchor capacity in extremely poor soils and also not pose a navigation hazard. The helical anchors were deeply installed into the marine silt and the installation torque was monitored until the anchor was embedded into good load bearing soil in order to achieve the desired capacity. The drive extensions were disconnected by divers and a mooring termination attached that would allow a 360 degree swivel movement of the mooring system. The MacLean-Dixie Helical Mooring System proved to be the ideal solution to provide mooring anchors for the floating concrete wave attenuator.