Dredging at the Port of Brisbane has occurred since 1862 and is a vital part of operating a safe and efficient port.
The Port of Brisbane Pty Ltd is responsible for the maintenance of 90km of navigational shipping channel, stretching from the northern tip of Bribie Island, across Moreton Bay, and into the Brisbane River.
Dredging is highly regulated and is subject to strict State and Commonwealth legislation. Government agencies require all potential environmental effects to be investigated before any permits are granted.
Maintenance dredging is regularly carried out between Fisherman Islands and the Hamilton Reach of the Brisbane River to remove naturally deposited sediments that have accumulated within the shipping channel to ensure water depths are safe for shipping.
Periodically, larger capital dredging works occur to improve navigable access to the port or to acquire sand needed for future expansion and development activities. Trial dredging is often undertaken within our shipping channel to gather important baseline data on water ecology and chemistry and physical properties of the dredged material. The results will inform any potential risk and assist in developing management controls to prevent or minimise any environmental effects that might arise from capital dredging works.
We own a fleet of vessels to manage a wide range of dredging situations. The flagship of our dredging fleet is the TSHD Brisbane, which is the largest dredger of its type based in Australia.
We have a fleet of dredgers and support craft, including:
The Brisbane is a trailing suction hopper dredger and the main unit of our dredging fleet. Equipped with the latest state-of-the-art automation control and navigation systems, it is capable of performing capital and maintenance dredging in accordance with latest environmental standards. The Brisbane is used for maintenance and development dredging, and reclamation works in Brisbane, as well as an annual maintenance dredging campaign in north Queensland ports. The dredger is certified as an ocean-going dredger, and is available for contract work anywhere in Australia.
Dredging depth: 25m
Hopper capacity: 2,900 cubic metres
Discharge: pump ashore by bow coupling or bottom dump
Crew: 13 per two-week swings
The Ken Harvey is a clam bucket dredger used to dredge port berths and approaches, and usually employed in small-scale dredging operations.
Clam dredger with 3.25 cubic metre bucket
Attendant plant: workboat (Sea Lion), barges (Hercules and Samson), and anchor launch (Turtle).
The Jim Peel is a 15.8m survey vessel fitted with Reson Seabat 8125 Multibeam Echo Sounding System. This system is capable of high accuracy hydrographic survey for dredging, navigational channels and berth monitoring applications.
In addition to meeting our dredging requirements in Brisbane, the Brisbane spends up to five months of the year carrying out maintenance dredging contracts at Queensland ports. We have also completed a dredging contracts for the Port of Devonport in Tasmania and Newcastle in New South Wales.
The Alan M/Seahorse is a bed leveller dredger. This device consists of a bar pulled behind a work boat over the seabed to flatten peaks and valleys frequently left by dredging and other minor silt deposits.