Sand bypassing is undertaken to address siltation within the two channels. The project is considered successful both at addressing erosion on the nearby beaches and providing continued safe navigation through the channels.
Beach renourishment
Method: Sand bypass/backpass
Sand source: Same sediment compartment
Sand volume (m2): 85,000/year (Dawesville), 100,000/year (Mandurah)
Sand placement: Visible beach
Frequency of renourishment: Yearly
Date of first renourishment: 1995
Approach
Beach renourishment
Geographic context
Open coast
Organisation responsible
WA Department for Planning and Infrastructure
Primary objective
Safe navigation
Coastal hazard
Erosion
Asset vulnerable
Built
Date of completion
Ongoing
Cost ($AUD)
$1.58 million
Source of project funding
State government Local government
Project approvals needed
State, Local