Department of Transport coastal infrastructure general manager Steve Jenkins said the annual sand replenishment at Dawesville was finished, with the second largest amount of sand moved in one campaign recorded.
Similar work has begun at the Mandurah Ocean Entrance.
Mr Jenkins said movement of sand from a deposit on the southern side at both locations to the beach on the northern side ensured erosion of the beaches to the north was limited and nearby navigation channels were maintained.
�At Dawesville, a total volume of 114,000 cubic metres of sediment was mechanically moved from a sand trap on the southern side of Dawesville Channel to the north to continue the natural movement of sand along the coast,� he said.
�The annual bypassing at Dawesville, which finished last month, allows people continued access and enjoyment of the beaches to the north at Avalon and Falcon, at the same time as ensuring the navigational safety of the channel.�
Mr Jenkins said bypassing at the Mandurah Ocean Entrance would continue until reaching the larger than usual target volume of 180,000 cubic metres.
�The Department works closely with the City of Mandurah on this jointly funded project,� he said.
�Together, the Dawesville and Mandurah bypassing projects represent a $2.9 million investment in coastal management, ensuring the safe navigation of the Peel Harvey Estuary and protection of Mandurah beaches.�