Rock Bag Filter Units – The Smart Choice For Environmental & Infrastructure Protection
Engineered for strength, simplicity, and sustainability—our Rock Bag Filter Units protect coastlines, bridges, underwater assets, and more.
Environmental
Rock Bag Filter Units offer versatile, sustainable protection for natural environments. Use them for riverbank stabilization, landslip control, mangrove preservation, sand nourishment, coastal erosion defense and other marine applications.
Infrastructure
Our Rock Bag Filter Units shield vital infrastructure—sea walls, bridge foundations, ports, pylons, undersea cables, dams, railways—from tidal erosion, storm surges, flash floods, and climate-driven damage.
Quick & Cost-Effective Deployment
Rock Bag Filter Units deliver long-lasting scour protection with minimal equipment and manpower. Whether on remote or complex sites, small teams can efficiently install hundreds of units daily—faster and more economical than concrete, gabions, or riprap.
World-Class Quality & Range
- Available in PE (for sub-surface) and HDPE (for above-ground and UV-exposed environments)
- Sizes from 0.5T to 12T
- Manufactured using virgin, high-grade materials with serial-number traceability
- Undergoes multi-layered testing: laboratory certified, batch-tested, and strict lifting-ring standards
- Proven durability, longevity, and consistent performance
Innovative Self-Autonomous Hook™
Our patent-pending Self-Autonomous Hook™, designed by Project Material Pty Ltd, automates rock bag release—ideal for hazardous or sub-surface projects.
- Safety: No manual or diver intervention required
- Reliability: Load-activated release; zero mechanical failure risk
- Efficiency: Simplifies installation, reduces labor and time
- Versatility: Seamlessly integrates with Coda Octopus 3-D sonar for precise underwater placement
Here is a sample video of Rock Bag Filter Units being deployed into a difficult access site.
Ready to Secure Your Project?
Contact us today for design guidance, technical data sheets, and deployment support—or ask about integration with Coda Octopus sonar system for underwater deployment with pinpoint accuracy.
OUR SERVICES
We collaborate with clients around the world for design, supply and deployment success !
Great Ocean Road
Great Oceans Road – In order to protect a large beach front retaining wall from potential collapse, rock bags were deployed as an armouring system to dissipate wave energy and reduce scouring. Storm surge and inclement weather had compromised the retaining wall which was a safety concern with local council. Rock bags were chosen for their ability to be filled and craned into position protecting the wall and local community.
Cape Conran Victoria
Along the magnificent far eastern coastline of Victoria lies the beautiful township of Cape Conran. Contractors selected Rock Bags to create an innovative wave barrier in conjunction with coffer dam to protect a work area from tides and wave action while dismantling and rebuilding a jetty. Rock bags were prefilled and transported to site for rapid deployment and craned directly onto the sea floor to create the wall structure.
Water Reservoir Victoria
After the devastating floods in 2022, the Bostock Water Reservoir in regional Victoria suffered a major failure on the spillway. Though collaboration with engineers and Barwon Water Authority a plan was executed to repair the massive scour hole that formed when flood waters undermined the concrete plates. Rock Bags along with concrete were used to fill and stabilise the structure.
Noosa Shire QLD
Noosa Shire Council implements rock bags to protect a collapsing creek bank and exposed infrastructure after flood waters severely damaged the area. The rock bags were filled at a local quarry, transported to site and craned into position with ease and efficiency. The council successfully mitigated any further damage from future floods by armouring the creek bank and protecting exposed water pipes from costly repair or replacement.
West Brisbane QLD
The Bremer River located in South East Queensland is a tributary river to the larger Brisbane River. It meanders through the Scenic Rim, Ipswich and towards Brisbane. The area is prone to flooding therefore also prone to erosion and damage to infrastructure. Rock Bags were cleverly placed up the embankment which suffered erosion from a series of flood events. The area is now fully stabilized by Rock Bags and nature has taken over by re-vegetating over the entire site.
Port Macquarie NSW
After huge seas battered the East Coast of NSW, local council chose Rock Bag Filter Units to stabilise, reinstate and protect exposed sand dunes and storm water infrastructure. Given the sensitive location, HDPE bags were chosen to ensure maximum longevity to UV exposure and abrasion resistance given the likely hood of waves breaking against the rock armouring system. In 2025 large waves battered the area again with no scour or damage to the area protected by Rock Bag Filter Units.
Spillway Extension Ghana
The Akosombo dam, located in the mountains of Ghana required a spillway extension to create hydraulic lift. The 50 year old design had never been tested previously however after recent heavy rains, the spillway was activated for the first time only to discover high velocity water released created gigantic scour holes undermining the spillway. As a “worlds first” design and installation, a large retaining wall system using 8 ton Rock Bag Filter Units was constructed under water with 20,000 cubic metres of back fill progressively staged from one side of the dam to the other. The project has drawn global attention for its novel design and rapid installation.
Central West NSW
Regular flooding in the central west areas of New South Wales saw local rivers scouring away embankments impacting local land whilst increased sediment flowed down stream. A number of sites required immediate remediation and Rock Bag Filter Units were the chosen armouring system for efficiency and safety. Our autonomous self release hook was utilsed on almost vertical embankments allowing the crane operator to place and release the rock bags with-out human intervention.
