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Aqua Rock Bags®

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Aqua Rock Bags®

The AquaRockBag® is a robust, long-lasting revetment system designed for use around bridges, structures, shorelines, rivers, and estuarine environments.

Developed from over 25 years of Salix’s soil bioengineering expertise, AquaRockBags combine graded rock infill with high-performance, UV-stable nets to deliver flexible, sustainable, and ecologically beneficial erosion protection.

Key Benefits

  • Durable & Proven Performance: AquaRockBag nets are the most robust available for both freshwater and saline conditions, offering exceptional UV resistance and anti-abrasion properties.

  • Sustainable Alternative: A practical and eco-friendly replacement for concrete, gabions, blockstone, or riprap systems.

  • Hydraulic & Ecological Function: The smaller graded rock within each bag dissipates water energy, slows flow velocity, and creates interstitial spaces that trap sediment and provide habitat for invertebrates, supporting natural vegetation establishment over time.

  • Versatile Application: Can be used independently or combined with Salix vegetated systems above water level to create integrated bioengineering solutions for scour and erosion control.

  • Installation Efficiency: Pre-filled units offer rapid installation, significant labour savings (up to 90% compared to gabions), and can be deployed in flowing or submerged conditions.

  • Safe & Flexible: The system naturally contours to uneven ground surfaces, avoids on-site fabrication, and enhances health and safety during installation.

By working with natural processes rather than against them, AquaRockBags deliver a low-carbon, habitat-friendly solution for asset protection, combining engineered reliability with long-term biodiversity gains and resilient watercourse management.

 

 

Related Projects

AquaRockBags for Emergency and Temporary Work

Salix supplied over 500 pre-filled AquaRockBags to Jackson Civil Engineering for emergency flood protection and as a foundation for repair works in Matlock.
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River Towy, Bank Erosion, Carmarthen

Salix restored 90 metres of collapsed riverbank along the River Towy in Carmarthen using Aqua Rock Bags and brushwood to provide long-term erosion protection, habitat creation, and natural slope stabilisation despite limited site access.
+ More

Yearl Weir

Following severe flooding in West Cumbria, Salix reinstated eroded riverbanks on the River Derwent near Yearl Weir using AquaRockBags and live rootwads. The bioengineered solution provided durable erosion protection, restored habitats, and safeguarded key infrastructure with low-carbon, environmentally sensitive design.
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Irlam Wharf

Canal Bank Remediation, Irlam Wharf

Salix collaborated with Marshall Construction to deliver a value-engineered, bio-engineered remediation of 400 metres of eroded canal bank on the Manchester Ship Canal, providing long-term slope stability, environmental enhancement, and cost savings through on-site innovation and efficient project management.
+ More

Root & In-River Causeway Installation at Calverley, Leeds

Salix collaborated with Bam Nuttall to stabilise the severely eroded Calverley Riverbank in Leeds through the installation of Root-Wads, Aqua Rock Bags, and bespoke backwater features.
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Silverthorne Sheet Piling

Salix built a 60-year sheet piled wall with a reinforced concrete capping beam at Silverthorne Lane, Bristol, replacing a failed timber wall and overcoming complex tie-ins, access, and ground challenges while ensuring full environmental compliance.
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Restoring Saltmarsh Habitats to Prevent Erosion

Salix restored 600 m of eroding saltmarsh at West Thurrock using brushwood fascines and native plug plants to retain sediment, reduce erosion, and re-establish diverse vegetation, enhancing habitat for fish, invertebrates, and birds while improving SSSI status and providing natural flood protection.
+ More

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