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Maintenance Dredging

Port of Portland Sand Bypass Project

Port of Portland Limited (POPL) is located on the western side of Portland Bay to the north of Point Danger. The construction of breakwaters in the 1950’s has interrupted the south–to-north long shore transport of sand along the western foreshore of Portland Bay. Sand is accumulating on the south-eastern side and around the head of the Main Breakwater, resulting in a sediment deficit and erosion down-drift (north) of the port.

The ‘Sand By-passing and Smelter Obligations Deed’ (the Deed) enacted on 6 March 1996 requires POPL to by-pass a minimum of 150,000 m3 of sand every three years, with a minimum of 25,000 m3 every year. No more than 150,000 m3 of sand can be bypassed in any twelve month period under the conditions of the Coastal Management Act 1995 consent, granted on 29 April 2013.

The Department of Transport, Planning and Local Infrastructure (DTPLI) support the sand by-passing extraction and placement activities, including the sand volumes, as proposed in the Environmental Management Plan (EMP), recognising the commitment to reduce sand accumulations along the main breakwater.

Sand will be placed in the intertidal zone (not greater than 1.3 m depth at high tide) in the immediate vicinity of Andersons Point. Note that in previous campaigns sand placed in this area has been rapidly moved to the north by coastal processes.

Reference: Port of Portland Sand Bypass Project – Environmental Management Plan


For further information on this project, please contact:

David Shennan
Harbour Master
Port of Portland Pty Ltd

Telephone: (03) 5525 0981 / (03) 5525 0980
Mobile: 0439 209 120
Fax: 03 5521 7488

 

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