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DEMOLITION

Polaris Marine Group provides safe, efficient, and environmentally responsible marine demolition services across Australia. Whether it’s the full removal of obsolete wharves or the partial demolition of marine structures to enable upgrades, our experienced team delivers controlled outcomes in challenging tidal and nearshore environments. With our in-house marine fleet and civil crews, we offer an end-to-end demolition solution that minimises risk, cost, and delays.

End-to-End Marine Demolition Solutions

Demolition in the marine environment requires more than standard civil techniques. Polaris Marine Group combines marine access, piling expertise, structural dismantling, and material handling to ensure successful outcomes. Our demolition services are tightly integrated with logistics, environmental controls, and marine asset management, enabling us to tackle complex demolition programs with confidence. From early planning to final debris removal, we manage a full range of services that include structure assessment, safe dismantling and loadout procedures, crane operations, underwater cutting, and debris control. Every demolition program is tailored to suit the structure type, waterway conditions, and stakeholder requirements, ensuring each stage is executed safely and efficiently.

Project Summary

Key Achievements

Planning and Environmental Considerations

Effective demolition starts well before any structure is taken down. Our team supports clients in navigating the regulatory approvals process, developing risk assessments, and identifying environmentally sensitive areas. We assist with engineering assessments to evaluate structural stability, as well as considerations around heritage approvals where applicable. Our specialists coordinate environmental management plans and help classify waste materials to identify safe and compliant disposal options. This early involvement ensures sensitive areas are protected, and regulatory expectations are met without compromising progress.

Types of Marine Structures We Demolish

Polaris Marine Group provides demolition services across a wide range of marine infrastructure types. We manage the full or partial demolition of timber and concrete wharves, piers, jetties, and other waterfront structures. We also handle the dismantling of sheet pile and tubular pile walls, dolphins and fender systems, bridge piers and abutments, and even marina pontoons and access walkways. For projects involving derelict vessels or submerged hazards, our marine teams apply project-specific solutions designed to ensure safety, protect water quality, and deliver clean results.

Specialist Equipment and Capabilities

Polaris Marine Group owns and operates a fleet of specialised equipment designed to support complex demolition operations on and over water. Our fleet includes shallow draft barges for tight-access work, crane barges for heavy lifting, and long-reach machinery for dismantling structures safely from the water. We’re equipped with underwater oxy-arc cutting tools and pile extraction systems, giving us the flexibility to remove structures that extend below the waterline or are embedded in hard substrates. With experienced marine crews and equipment operators on staff, we manage all aspects of site setup, mobilisation, and delivery without relying on third-party contractors.

Integration With Marine Construction

Demolition is often the first stage of broader marine construction or upgrade programs. Polaris Marine Group excels in managing demolition works as part of a sequenced construction schedule. By integrating demolition, piling, and civil marine construction under one roof, we reduce delays between work stages and ensure consistency in methodology and project communication. This is particularly valuable for wharf upgrades, marina reconfigurations, vessel access improvements, and bridge expansions or replacements. Clients benefit from fewer subcontractors, faster turnarounds, and enhanced accountability across the project lifecycle.

Safety and Compliance

Demolition works in the marine environment present a unique set of risks. Our team maintains the highest standards of workplace health and safety, backed by accredited systems and rigorous training. We prepare site-specific demolition management plans and Safe Work Method Statements (SWMS) for every job. Lift studies, floating plant stability assessments, and detailed hazard management plans are completed prior to mobilisation. We also identify hazardous materials, such as asbestos or lead paint, and apply stringent control measures for debris containment and waterway protection. Our demolition crews work closely with regulators to ensure full compliance at all times.

Project Examples

Our demolition portfolio spans the full spectrum of marine structures. We’ve removed storm-damaged jetties and pontoons in challenging tidal zones. We’ve demolished ageing timber wharves as part of major harbour redevelopments. Our teams have completed underwater cutting and extraction of redundant bridge piers, and removed old marina infrastructure to make way for modern upgrades. We’ve handled the extraction of corroded steel piles and relocated submerged debris, often under time-sensitive or environmentally sensitive conditions. Each project is delivered by an experienced project team supported by in-house marine logistics and environmental specialists.

Why Choose Polaris Marine Group for Demolition

With a reputation built on reliability and capability, Polaris Marine Group is a trusted partner for marine demolition works. Our clients include Tier 1 contractors, government agencies, and asset owners who require certainty of outcome in sensitive marine environments. We offer a full-service marine team that combines demolition, piling, towage, logistics, and civil capability under one roof. With in-house equipment and crews, we maintain control over every phase of the job and avoid the delays associated with subcontracting. Our proven track record includes projects for both public and private clients, backed by a strong focus on sustainability and regulatory compliance. With depots in Sydney, Newcastle, and Brisbane, we offer rapid mobilisation and a consistent, high-quality service across the east coast. From ageing infrastructure removal to major site clearances, Polaris Marine Group delivers the professionalism and capability needed for complex demolition projects. Contact us to discuss your next marine demolition requirement. We’ll work with you to deliver a safe, compliant, and efficient solution, on time and on budget.

PROJECTS

SEE US IN ACTION

Manton Dam

Polaris Marine Constructions were engaged by Exact Contracting to provide a modular crane barge service at the Dam wall at Manton Dam to deliver the replacement of internal valving and upgrades to the infrastructure of the Intake tower.

Nelligen Bridge Marine Support and Demolition Contract

Polaris Marine Group played a key role in the Nelligen Bridge project, providing overwater support for construction before demolishing the 7-span, 5,000-tonne bridge. The in-house demolition was incident-free, using a suspended work deck with geotextile and drainage to capture debris. Materials were processed on-site and recycled. This project highlighted Polaris Marine’s expertise in complex marine demolition within sensitive waterways.

Seabed Services Pipe Line Deployment

Deploy 3 service pipe lines on the sea floor between Garden Island and Fort Dennison and cover with precast grout mattresses.

Fort Denison – Ferry Wharf

This project included wharf demolition, sea wall remediation, pile installation, concrete works, and the installation of a new pontoon with electrical connections.

Circular Quay – Western Promenade – Soffit Concrete Repairs

This project involved concrete remediation works, including hydro-blasting, shotcrete application, bar reinforcement, protective coatings, and concrete cutting, with site set-up, exclusion zones, and sound curtain installation to ensure safety and minimal disruption.

Manly Boat Shed – Pontoon & Jetty Replacement

This project involved constructing a pontoon, gangway, and timber jetty, including piling, demolition, and electrical connections, to deliver a durable marine access solution.
SEE MORE POLARIS PROJECTS

TESTIMONIALS

HEAR FROM SOME
OF OUR CLIENTS

★★★★★ 5/5
“Polaris are awesome to work with, they make landscaping jobs with tricky access a breeze.”

Johnny L - Distinct Landscapes

★★★★★ 5/5
“The attention to detail provided by PMC during the project could not be faulted. Execution, safety, onsite management and the finished product were at a very high standard. Communication throughout the project from PMC Supervisors and Project Manager were regular and accurate. This enabled Thales to understand daily activities, problems and overall progression at every stage. Ultimately, the professionalism shown by PMC through all aspects of the project, enabled for a successful end product to the Commonwealth. I can’t thank Dane and the PMC team enough for the way the project was ran, start to finish.”

Jake Duncombe, Project Manager

★★★★★ 5/5
“Polaris were an exceptional contractor to work with throughout this project. They were fluent in communication, timely, reliable, nailed the quality of work and went out of their way to be flexible with Thales needs. They have a positive and healthy working relationship with Thales.”

Owen Gardner, Project Manager

★★★★★ 5/5
“I have had the pleasure of working with Polaris for the last couple of years, particularly with transporting vehicles for events, deliveries, and contractors. Their Team is professional and reliable, from their Operational Team, Cookie & Jay, to their Skippers and deckhands are incredibly efficient, even under tight event schedules. What really stands out is their attention to detail and commitment to customer satisfaction. Such as accommodating last-minute changes, they always go the extra mile to make sure everything runs smoothly, giving us peace of mind. Over the years we have built a great relationship/partnership with Polaris and we look forward to continuing to work with them for years to come.”

Keighley O, Sydney Harbour Trust

GET IN CONTACT

If you need to tow it, show it, build it, push it, deliver it, lift it or salvage it over water; please complete this form and one of our team will be in touch.

Gate 2, James Craig Rd, Rozelle NSW 2039

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Phone: +61 2 9563 8333
Emergency Phone: +61 (0) 418 231 916

[email protected]

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Gate 2, James Craig Rd, Rozelle NSW 2039
[email protected]
Phone: +61 2 9563 8333
Emergency Phone +61 (0) 418 231 916
CERTIFICATION
BIMCO Certified
Certifications