Repair of Shared Users Path Concrete Boardwalk, Beach Street, Huskisson, City of Shoalhaven

City Services intend to repair the damaged shared user path (SUP) boardwalk that suffered undermining of founding soils during the multiple storm events during June to August 2022. The structure inspection found that the existing concrete piers require re-construction, whilst the concrete planks and bearers are suitable for reuse.The proposed activity is to reconstruct the SUP boardwalk using the existing concrete permatrak planks, supported on suitably designed driven H5 treated hardwood timber piles. The piles would be founded nominally two metres into the weathered bedrock layer and cantilever out of the ground to the underside of the permatrak bearers. The pile locations would match the existing pier design locations to support the permatrack bearers in the same location.
The existing permatrack concrete planks and bearers would be carefully removed and stacked for re-use, utilising manual labour and small excavator / bobcat or similar.