Foreshore seagrass relocation project
Whyalla City Council will undertake a one-day Foreshore Seagrass Relocation Project on Wednesday, 11 February, aimed at improving coastal protection, reducing windblown sand, and improving the beach experience for residents and visitors.
The project involves relocating beach-cast seagrass wrack that has accumulated between the disabled beach access point and the marina breakwater at the Whyalla Foreshore.
The wrack will be harvested using an excavator and dump truck and strategically relocated onto the frontal dunes adjacent to the Caravan Park, progressing back towards the Foreshore and Whyalla Waves Café. Once placed, the seagrass will be shaped into neat piles and compacted.
Project Manager Sam Bourne said the project makes practical use of a natural material to address ongoing coastal challenges.
“Beach sand at the Foreshore is highly susceptible to erosion from strong winds, and using seagrass wrack in this way is an effective, natural method to help stabilise the sand,” Mr Bourne said.
"The relocated seagrass will also assist in forming a more erosion-resistant foredune, providing long-term protection for foreshore infrastructure from tides and storm surges, while improving dune fertility.
“While some wrack will be relocated, we will ensure sufficient seagrass remains on the beach to continue providing essential habitat and environmental functions,” he said.
In addition to environmental and erosion control benefits, the project is expected to improve the swimming experience for beach users, who will be able to access the water more easily, particularly at high tide.
While some residents have called for the material to be removed from the beach, Mr Bourne said council is not permitted to remove it, so can only relocate it to assist with sand management / control.
Residents and visitors may notice a temporary “smell of the sea” from the newly placed seagrass piles. However, this is a natural occurrence and is expected to dissipate within a couple of days.
Works will be carried out by local contractor Whyalla Earthworks. Pedestrians are asked to maintain safe distances from the worksite and operating machinery, with trained spotters onsite to manage pedestrian safety throughout the duration of the works