BMT Mooloolah River entrance contract delivery has been confirmed, with the international engineering consultancy appointed to progress the design, approvals and procurement needed for a long-term safety and navigation solution at the entrance to Mooloolaba Boat Harbour.

The Queensland Government appointed BMT following an independent review into persistent shoaling, navigation risks and access constraints at the Mooloolah River entrance on the Sunshine Coast.

The recommended long-term response involves a two-stage approach. The first proposed stage is a sand trap near Buddina Beach to intercept sand before it enters the navigation channel. The second involves deeper channel works intended to address shallow areas, including difficult coffee-rock material beneath the entrance.

BMT will now undertake the future design, approvals and procurement activities required to shape and advance the preferred solution. The value and duration of BMT’s consultancy contract have not been publicly disclosed.

BMT Mooloolah River entrance contract moves project into design

The BMT Mooloolah River entrance contract represents the next formal step after the completion of an independent technical review led by RPS Consulting with support from International Coastal Management.

The review examined short-term and long-term options for managing sand accumulation and improving the reliability of the harbour entrance.

Based on the review’s recommendations, the Queensland Government has moved to the design and approvals stage by appointing BMT to develop the long-term solution.

BMT’s announced responsibilities include:

• developing the design for the recommended harbour-entrance solution;
• progressing environmental and statutory approvals;
• supporting technical investigations and design development;
• preparing procurement documentation;
• assisting with the future selection of delivery contractors; and
• helping establish a deliverable long-term management strategy.

The appointment does not represent the award of the future construction or dredging contract. BMT is leading the professional-services phase required before major physical works can be procured.

Two-stage solution proposed for the harbour entrance

The independent review recommended a staged approach to improving access through the Mooloolah River entrance.

The proposed works include:

• a sand trap near the Buddina Beach side of the river entrance;
• deeper excavation of the navigation channel;
• removal or treatment of shallow coffee-rock material;
• continued management of sand accumulation;
• design development and environmental approvals;
• future procurement of construction and marine contractors; and
• ongoing dredging while permanent measures are progressed.

The sand trap is intended to intercept sediment moving towards the entrance before it accumulates within the main navigation channel.

The deeper-channel component is intended to improve navigable depth and address areas where shallow coffee rock restricts the ability to establish and maintain a safer entrance.

The final configuration, construction methodology, cost and delivery timeframe will depend on BMT’s design work, approval requirements and future procurement outcomes.

Why sand continues to accumulate at Mooloolaba Harbour

The Mooloolah River entrance is affected by coastal sediment movement and naturally occurring sand build-up, commonly described as shoaling.

Wave action, tides, currents, storms and seasonal coastal processes can move sand into and across the navigation channel.

As sand accumulates, the entrance can become shallower and more difficult to navigate, particularly during low tides, adverse weather or larger swell conditions.

Maritime Safety Queensland currently uses ongoing dredging to manage the channel and aims to maintain a design depth of at least 2.5 metres below Lowest Astronomical Tide. However, naturally changing conditions mean the actual entrance environment can vary and mariners remain responsible for assessing conditions before crossing.

Current dredging and navigation information is available through the Maritime Safety Queensland Mooloolaba dredging page.

Sand trap proposed near Buddina Beach

The first proposed stage involves creating a sand trap near Buddina Beach.

A sand trap is an engineered area intended to capture sediment before it migrates into a critical navigation channel or harbour entrance.

By concentrating sand within a defined collection area, maintenance dredging may be undertaken in a more controlled and predictable location.

The effectiveness of the proposed sand trap will depend on factors including:

• coastal sediment-transport patterns;
• wave and tidal behaviour;
• trap location and geometry;
• available dredging access;
• storm and cyclone conditions;
• environmental constraints;
• the rate at which the trap fills; and
• how dredged sand is transported, reused or placed.

BMT’s design process will need to determine the appropriate dimensions and operating strategy before the concept can proceed to construction procurement.

Channel-deepening works and shallow coffee rock

The second proposed stage involves deeper navigation-channel works.

A key technical challenge is shallow coffee rock located beneath parts of the entrance. Coffee rock is a naturally occurring cemented coastal material that can be substantially harder to remove than loose sand.

Where loose sediment can be dredged using conventional equipment, hardened or cemented material may require different excavation techniques, specialist plant or more intensive environmental controls.

The design will need to consider:

• the depth and extent of coffee-rock material;
• the required navigation-channel depth and width;
• marine excavation methodology;
• equipment access and operating conditions;
• management of excavated material;
• water-quality controls;
• noise, vibration and environmental impacts;
• interaction with existing breakwaters and infrastructure;
• ongoing dredging requirements; and
• safe access during construction.

The final engineering solution may be staged so that priority safety improvements can proceed while more complex excavation or approval requirements are resolved.

Safety remains central to the Mooloolah River project

The long-term safety review followed the fatal boating incident at the Mooloolah River bar in August 2025, when experienced commercial fisherman Robert “Smithy” Smith died after his vessel overturned while crossing the entrance.

The incident intensified calls from the boating community, fishing operators and local representatives for a more permanent response to the harbour entrance’s navigation risks.

Public reporting states that the vessel was carrying four passengers, who survived after the boat washed ashore.

The incident is an important part of the project’s context and should be reported respectfully. The engineering program is intended to reduce long-term navigation risks, but no harbour entrance can be made free of all weather, tide, vessel or operational hazards.

Mooloolaba Boat Harbour supports a major marine economy

The Mooloolah River entrance provides access to Mooloolaba Boat Harbour, a significant Sunshine Coast marine gateway.

The harbour supports:

• commercial fishing vessels;
• charter-boat operators;
• recreational boating;
• marine tourism businesses;
• boat maintenance and repair operations;
• marinas and vessel storage;
• marine rescue and emergency services;
• pilot and support vessels; and
• associated hospitality and waterfront businesses.

Access restrictions or hazardous entrance conditions can affect vessel movements, business operations and confidence among recreational and commercial users.

The government has therefore framed the project as both a safety initiative and an investment in regional economic activity.

Existing dredging will continue during design

Existing dredging programs are expected to continue while BMT develops the long-term solution.

Ongoing dredging remains necessary because design, approvals and procurement for permanent works may take considerable time.

Maintenance dredging may involve:

• hydrographic surveying;
• monitoring of channel depth;
• mobilisation of dredging equipment;
• removal or redistribution of accumulated sand;
• management of dredged material;
• temporary navigation controls;
• environmental monitoring; and
• publication of updated maritime safety information.

The continuation of dredging does not mean the long-term project has been delivered. It is an interim management measure intended to maintain access while the preferred permanent response is developed.

Approvals likely to be a major part of BMT’s scope

Marine and coastal engineering projects can require approvals across several environmental, planning and maritime jurisdictions.

Potential approval considerations may include:

• coastal-process impacts;
• marine plants and habitat;
• water quality and turbidity;
• fisheries and aquatic ecology;
• dredged-material management;
• beach and shoreline impacts;
• noise and construction disturbance;
• navigation safety;
• heritage and cultural values;
• Commonwealth environmental requirements; and
• State development and operational approvals.

Approval requirements will depend on the final design, construction footprint and proposed management of excavated sand and rock.

These processes may influence the timing and staging of future construction works.

Future procurement expected after design development

BMT’s procurement role is expected to support the future appointment of contractors capable of delivering the selected marine and coastal works.

Potential future packages may include:

• marine dredging;
• sand-trap excavation;
• coffee-rock excavation;
• hydrographic survey services;
• marine construction;
• temporary navigation management;
• environmental monitoring;
• coastal modelling;
• survey and geotechnical investigations;
• material transport or placement;
• marine plant hire;
• specialist diving and inspection services; and
• construction supervision and quality assurance.

No future construction contractor has been announced, and the availability, timing and structure of procurement packages remain subject to design and government decisions.

Businesses should monitor official Queensland Government procurement channels rather than assuming work packages are currently open.

Supply-chain opportunities from the BMT contract

The BMT Mooloolah River entrance contract may generate professional-services and investigation work before major construction begins.

Potential areas of industry participation may include:

• coastal engineering;
• marine engineering;
• hydrodynamic and sediment modelling;
• hydrographic surveying;
• bathymetric surveying;
• geotechnical drilling and investigation;
• environmental impact assessment;
• marine ecology studies;
• water-quality monitoring;
• planning and approvals support;
• stakeholder and community engagement;
• cost estimating;
• constructability reviews;
• procurement documentation;
• marine safety planning;
• risk assessment;
• technical drafting and modelling;
• project controls; and
• independent design review.

Future delivery phases may create additional demand for dredging contractors, marine plant operators, civil contractors, surveyors and environmental specialists.

These areas are indicative only and do not confirm that individual packages remain available.

Why BMT is suited to the marine engineering assignment

BMT is an international engineering and technical consultancy with experience across maritime infrastructure, ports, coastal systems, shipping and defence.

The company’s work commonly involves:

• coastal-process assessment;
• port and harbour planning;
• navigation studies;
• marine infrastructure design;
• environmental and technical assessment;
• hydrodynamic modelling;
• risk analysis; and
• project advisory services.

For the Mooloolah River assignment, the consultancy must translate the independent review recommendations into a technically feasible, approvable and procurable project.

This includes considering not only whether a concept can be engineered, but also whether it can be constructed, maintained and operated within the dynamic coastal environment.

No public project or contract value disclosed

The Queensland Government announcement does not disclose the value of BMT’s contract or a confirmed construction budget for the long-term harbour works.

The project should therefore not be assigned a speculative multimillion-dollar figure.

The correct wording is:

BMT has been appointed to undertake the design, approvals and procurement activities for long-term safety improvements at the Mooloolah River entrance.

Any future estimate should be clearly identified as a project estimate rather than the value of BMT’s consultancy contract.

Why the BMT Mooloolah River entrance contract matters

The BMT Mooloolah River entrance contract is significant because it moves the harbour-safety response from independent review into active project development.

The appointment provides a named engineering consultant responsible for advancing the technical solution and preparing the work for future delivery.

For Sunshine Coast businesses, the project has potential relevance across marine engineering, environmental services, surveying, dredging and specialist construction.

For harbour users, the appointment provides a defined pathway towards a longer-term response to sand accumulation and shallow navigation conditions.

The project also illustrates the importance of early engineering, approvals and procurement work. Major physical construction cannot begin until the preferred concept has been investigated, designed and assessed in sufficient detail.

Bowen Basin Index readers can follow additional marine, transport and Queensland infrastructure developments through the Project Watch ports and logistics category, the engineering category, the environmental approvals category and the broader Project Watch news hub.

BMT Mooloolah River entrance contract summary

BMT has been appointed by the Queensland Government to progress the design, approvals and procurement required for long-term improvements at the Mooloolah River entrance.

The preferred approach includes a sand trap near Buddina Beach and deeper navigation-channel works intended to improve safety and harbour accessibility.

Existing dredging will continue while the long-term solution is developed.

The value of BMT’s contract, the total project budget and the future construction timeframe have not been publicly disclosed.