CITY of Stirling will investigate erosion of Trigg coastline after it received a State Government grant to identify risky coastal areas.
The City plans to match the $60,000 Department of Transport grant in the upcoming budget to asses wether underlying rock will protect West Coast Drive infrastructure from long-term erosion and rising sea levels.
Stirling engineering design manager Paul Giamov said the City was proposing detailed geophysical surveys of the rock north of Trigg Island.
“The basic presumption is that the existing proven rock provides a natural defence against erosion,” he said.
“The embayed beaches between the natural rock defences remain a potential hazard, as the extent of underlying rock along those stretches is unknown at this stage.
“This will enable the areas at risk to be determined, and will enable detailed designs and timetabling for the defensive works required to protect the critical infrastructure along West Coast Drive.”
The City proposed a coast hazard risk management plan at a May council meeting which identified Mettams Pool ‘risk’ area for erosion and budgeted $40,000 for defence works under West Coast Drive shared pathway to protect it.
“It is recommended that a detailed design is completed next financial year to address the current most critical risk at Mettams Pool, as well as further detailed geophysical ground investigations of at risk sections north of Trigg Island,” the report said.
Transport Minister Rita Saffioti said the Coastal Adaptation and Protection grants program would foster strong partnerships with local authorities and would provide coastal engineering guidance through the Department of Transport’s specialists.