One coastal adaptation project already underway is a carpark retreating project on the Esplanade at Seaford, opposite Tiller Drive, which addresses erosion issues impacting the existing clifftop infrastructure.
The project, which began on 14 June and is expected to be completed in early spring, involves:
- retreating infrastructure to allow for cliff erosion
- reduction and relocation of existing carpark, including new kerb and asphalt
- relocation of shared-use path
- relocation of fencing, lookout area, shower, and furniture
- planting of new vegetation.
The project follows community consultation in March and shoreline analysis undertaken in council’s Coastal Scoping Study, which provided evidence that retreat of infrastructure is a viable first option for the area to address the cliff’s long-term erosion.
The erosion over the past 60 years has been caused by waves at the cliff’s base, and groundwater discharge mid-slope, which have increased the steepness and instability of the cliffs, accelerating the erosion.
By retreating the infrastructure, cliff recession will continue and steep slopes can find an equilibrium (less steepness), so the council can maintain the natural and cultural values of this important coastal environment.
The project’s coastal location brings with it particular significance to local Traditional Owners, and council staff have been working with the Traditional Owner members of its First Nations People Advisory Group (FNPAG) to learn more about this significance.
Through this collaborative approach, shared understandings are developing regarding the cultural significance of the coastline and how to protect this as council upholds its responsibilities to also protect public amenities from the ongoing natural threat of coastal erosion.
The final design of the new shared path segment will play a storytelling role in the form of artwork stencilled into the concrete path, recognising the strong Kaurna heritage associated with the location.