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Dredging proposed by the Port of Brisbane plans to remove 96.5 million m³ in Moreton Bay over 20 to 25 years, starting in 2028, to deepen, widen, and realign navigation channels, enhancing safety, efficiency, and capacity for larger ships under active environmental assessment on the current Australian coastline.
The dredging of approximately 96.5 million m³ in Moreton Bay is at the heart of the navigation channel improvement project of the Port of Brisbane, in Australia. The proposal, last updated on March 3, 2026, has an active EIS, meaning it is still undergoing an environmental impact study.
According to the government site CoordinatorGeneral, the plan aims to widen, deepen, and realign sections of the existing navigation channel to allow the safe and efficient passage of larger ships with greater draft. Construction is scheduled to begin in 2028, within a works program that may extend for 20 to 25 years.
Billion-dollar dredging targets deeper and wider channels in Moreton Bay
The Port of Brisbane project proposes a large-scale intervention in the navigation channels serving the terminal. The idea is to modify the current maritime route design to keep up with the increasing size of ships used in global trade.
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The dredging is expected to remove about 96.5 million cubic meters of material over two decades or more. This volume will be necessary to deepen, widen, and realign parts of the existing channel network.
According to the documentation, the goal is to increase the safety and efficiency of vessels crossing Moreton Bay towards the Port of Brisbane. The project does not aim to create a new port but to adapt an already strategic infrastructure to increasingly larger ships.
The reported investment is US$ 3.5 billion, with an expectation of 100 construction jobs and 40 operational jobs. The information was provided by the proponent and may still change during the environmental process.
Port of Brisbane is a central piece of Queensland’s economy
The Port of Brisbane is described in the documentation as one of the pillars of Queensland’s economy. It is the third largest container port in Australia and the largest multi-cargo port in the state.
The structure handles approximately 5,300 vessel movements per year. On average, about US$ 55 billion in international trade passes through the port annually.
The relevance also appears in the cargo handled. The port accounts for approximately 50% of Queensland’s agricultural exports and 95% of the state’s vehicles and containers.
These numbers help explain why dredging was put forward as a long-term planning project. If the global fleet grows in size and draft, the channel needs to be assessed to maintain competitiveness and safety.
Current channels total a maritime network of 96 km
The Port of Brisbane’s navigation channel network is about 96 km. It starts near the intersection of Caloundra and Bribie Island, heads south to the southern tip of Moreton Island, and then advances 16 km up the Brisbane River to Breakfast Creek.
This route is essential for connecting the port to the open sea. Any change in the channel needs to consider curves, depth, width, traffic, safety, and environmental conditions.
The project proposes not only deepening and widening but also partial realignments and increasing the radius in some curves. The intention is to reduce risks when entering and exiting the port.
In practice, the channel functions like a maritime highway. When ships get larger, the “highway” needs to be reviewed to avoid bottlenecks, riskier maneuvers, and loss of operational efficiency.
Work may last between 20 and 25 years
The environmental documentation estimates that the dredging necessary to support the project will be carried out over 20 to 25 years. This turns the proposal into a long-term construction program, not a one-off intervention.
The start of construction is scheduled for 2028, but the project still depends on the progress of the environmental impact study and regulatory decisions. Currently, the EIS is active and being prepared by the proponent.
The process formally began with the application submitted on August 23, 2024. Then, on September 12, 2024, there was the declaration of a coordinated project, and on September 19, 2024, the Australian Minister for the Environment and Water decided that the project is a “controlled action.”
This means that the proposal is still under evaluation and should not be treated as a fully approved project. The scale is large, but execution depends on the environmental path and the required technical analyses.
Dredged material will have reuse and disposal options
One of the sensitive points of the project is the destination of the material removed from the bottom. The Port of Brisbane is still investigating options for the placement of the dredged material, including alternatives in disposal areas and possible construction of recovery areas.
Among the potential sites mentioned are Juno Point Reclamation Dredge Material Placement Area, Fisherman Island Expansion DMPA, Central Moreton Bay DMPA, and Northern Deepwater DMPA.
The documentation states that a comprehensive analysis of options will be conducted in subsequent environmental studies to determine the most suitable location. There is also a forecast for beneficial reuse and disposal of the material.
Dredging does not end when the sediment leaves the channel. The destination of this material is a central part of the environmental impact, cost, and public acceptance of a maritime project of this magnitude.
Project states that Ramsar and Commonwealth waters will be excluded from dredging
The documentation states that no dredging will occur within the Ramsar wetland area of Moreton Bay or in Commonwealth waters. It also states that no material will be placed within the Ramsar or in Commonwealth waters.
This point is relevant because Moreton Bay has environmentally sensitive areas. Large-scale maritime works usually require special attention to habitats, sediments, turbidity, fauna, and water quality.
Even so, the project is still under environmental evaluation. The existence of restrictions and excluded areas does not eliminate the need to study the impacts of the intervention on the channels and the material disposal sites.
The environmental phase will be decisive in defining limits, conditions, and control measures. In a project of up to 25 years, impacts need to be assessed not only at the beginning but throughout the entire program.
Larger ships pressure port infrastructure
The growth in ship size is cited as one of the main reasons for the project. The global fleet has been moving towards larger vessels, with greater draft and higher cargo capacity.
At the Port of Brisbane, dredging in Moreton Bay seeks to prepare the navigation channels for larger ships, reducing limitations of depth, width, and curves. The proposal aims to increase maritime safety and maintain the terminal’s competitiveness in the face of the global fleet’s evolution.
For a port that acts as a link for export and import, keeping up with this trend can be essential. Otherwise, larger vessels may face limitations in accessing the terminal under certain conditions.
The project also cites population growth, increased trade, and greater vessel movement as factors supporting the need for planning. Dredging appears as a response to long-term logistical pressure.
The intention is to allow larger container ships and bulk carriers to transit through Moreton Bay more safely and efficiently under a wider variety of operational conditions.
Maritime safety and efficiency are at the center of the proposal
In addition to accommodating larger ships, the project seeks to reduce navigation risks. Partial realignments and increased radius in curves can facilitate maneuvers, especially at critical entry and exit points of the port.
Efficiency also matters. More suitable channels can reduce restrictions, improve predictability, and make port operations more competitive for shipowners, exporters, and importers.
In strategic ports, a few meters of depth or width can change the logic of the operation. The ability to accommodate larger vessels influences costs, scales, routes, and international competitiveness.
The challenge is to balance this economic demand with environmental requirements. Moreton Bay is not just a navigation corridor; it is also a coastal area with ecological and social significance.
Dredging in Brisbane shows a new scale of port works
The dredging proposal for the Port of Brisbane shows how global ports are being pressured to adapt to larger ships, more demanding logistics chains, and expanding international trade.
With an estimated investment of US$ 3.5 billion, a planned removal of 96.5 million m³, and a term of up to 25 years, the project has enough scale to transform navigation in Moreton Bay if approved and executed.
At the same time, the environmental process is still ongoing. The final dimensions of the channels, the material disposal areas, and the execution conditions will be defined as the project progresses.
In the end, Australia is preparing for one of the major port discussions of the coming years: expanding channels to accommodate larger ships without compromising sensitive areas of Moreton Bay.
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