Swan Bay Entrance
View Large Image
View Large Image
Swan Bay is located within Lake Macquarie on the Central Coast of N.S.W. The project involved dredging of Swansea Channel in conjunction with the construction of the Groynes and Geotextile Containers has been designed to control the Tidal flows in the channel and to prevent erosion on Naru Point.
The project involves the dredging of 40,000m3 of sand from the Swansea channel, the construction of 4 Groynes and the filling and placement of approximately 750 lineal metres of sand filled Geotextile containers, some up to 26m long. The first activity was to dredge the material from the Swansea Channel and construct a temporary causeway to provide access to Spoil Island where approximately 70% of the works took place.
Once the causeway was completed, the construction of the southern rock groyne and placement of the sand filled Geotextile containers commenced. The first layer of Geotextile containers were placed underwater to form a stable platform for the top container which acts as a flow control device. Some of the sand material dredged to site was used to form a temporary platform around the area where the containers were placed, this allowed for placement in the design location without the effect of the strong tidal flows that occur in the Swansea Channel. Once placement was completed the temporary sand platform was removed and placed behind the structure to design levels. After certification of the works on Spoil Island the temporary sand causeway was removed by Long Arm Excavator and this material placed behind the structure built off Naru Point.