Eden Breakwater Wharf extension - construction

Site investigations

Prior to construction commencing site investigations were undertaken to determine the project’s engineering requirements. This included:

  • topographic survey and installation of survey controls
  • load capacity assessment by plate load testing
  • condition assessment of the Breakwater Wharf – thickness testing of sheet pile steel by divers to check for accelerated low water corrosion
  • geophysical surveys - side scan sonar, magnetometer and resistivity
  • sediment sampling and analysis – vibrocoring from a floating barge with diver support crew
  • geotechnical boreholes drilled from a jack-up barge.

Dredging

Heron Constructions has now completed dredging and the fabrication and installation of scour protection mattresses which will protect the existing and proposed wharf extension from the turbulence created by cruise ship propulsion systems.

Approximately 210,000m³ of material was dredged from Snug Cove and disposed of at the disposal ground, approximately six nautical miles off the coast. A significant amount of debris was also recovered from the seabed and disposed of at an accredited waste facility.

Marine structures

Waterway Constructions has now started work on Stage Two of the project, which involves:

  • extending the existing wharf by approximately 110m
  • installing three mooring dolphins and two breasting dolphins
  • installing three onshore mooring bollards on the existing wharf
  • upgrading existing services such as lighting, power, potable water and emergency fire-fighting water
  • installing navigation aids.

Piling is scheduled to commence in April 2018 and is expected to take up to eight months to complete, weather permitting. 126 steel piles will be driven into the seabed to create the foundations for the new wharf extension and dolphins. Piling rigs and other equipment that will be used will be located on the existing wharf and on barges adjacent to the wharf in Snug Cove.

Piling and related work activities will be undertaken during normal construction hours of 7am to 6pm Monday to Friday and from 8am to 1pm Saturday. Piling will not be continuous throughout the work day and there will be a scheduled respite period of one hour between 12 pm and 2 pm Monday to Friday. There will also be non-scheduled respite periods such as when moving barges, positioning piling rigs, and preparing and lifting piles and equipment into place.

Currently, works on the marine structures are scheduled to be completed in mid 2019, weather permitting.

Wharf closure

The carpark behind the Gotcha Bait factory and all of the Breakwater Wharf area will become a construction site and will be closed to the public from August 2017 until project completion. This is to ensure the safety of the public and the contractors while they work.

The carpark behind the Gotcha Bait factory and all of the Breakwater Wharf area will become a construction site and will be closed to the public from August 2017 until project completion.

Access to Shelly Beach

Shelly Beach is a popular spot for locals and visitors and will continue to be accessible during construction. The existing marked footpath that runs behind the Gotcha Bait factory will provide pedestrian access to the beach.