The South Australian Government has committed $43 million in funding towards replacing the iconic Granite Island Causeway.
A condition assessment has identified that the existing Causeway was approaching the end of its useful life and a feasibility study into the potential upgrade options determined that retaining and refurbishing the entire existing structure was not viable.
The new causeway is being constructed next to the existing structure and will continue to deliver and enhance social and economic benefits to the region, and provide a long-term solution that is environmentally sensitive.
A progressive system of piling and deck installation will be implemented and it is expected that piling works will take place during a two hour time slot, twice per week. Two piles will be driven in each time slot, dependent on marine activity and weather, while marine observers monitor for whale activity.
Works have been undertaken on the existing structure to maintain safety and accessibility while the new causeway is being constructed.
The new causeway is expected to be operational for late 2021, weather permitting, while the existing Causeway will be decommissioned after the new Causeway has been constructed. Decommissioning is expected to be completed in the second half of 2022.
The project is being delivered by the South Australian Government and head contractors McConnell Dowell Constructions and will support 43 full time equivalent jobs per year, over the life of the project.