Engineered Nature Crossings
Precast Arch Solutions
Background
Fauna and Flora Crossings for Environmentally Sensitive Areas
The Humes Bebo® Precast Concrete Arch system is increasingly being used across Australia for fauna and flora crossings. Its modular design supports fast, safe installation while reducing on-site disturbance, a major advantage in environmentally sensitive areas.
Available in every state and territory, the system can be tailored to suit a wide range of project requirements. With flexibility in span, finish, and site-specific detailing, it offers a practical solution for projects where environmental performance and constructability both matter.
These crossings also need to do more than provide structural performance. In many cases, they are part of a broader effort to protect habitat connections, support species movement, and reduce the impact of essential infrastructure on the surrounding landscape.
Key Challenge
Balancing Ecological Sensitivity with Construction Efficiency
Fauna and flora crossings require construction solutions that minimise environmental impact from the outset. Traditional in-situ methods can extend time on site, increase disruption, and create additional maintenance demands over the life of the asset.
Project teams needed a durable, low-maintenance system that could be installed quickly and efficiently while meeting strict environmental requirements. Reducing site activity, improving safety, and maintaining construction quality were all critical to success. In remote or environmentally constrained locations, these pressures can be even greater. Shorter installation windows and fewer on-site variables can make a significant difference to project delivery.
Delivering the Solution
Precast Arches Designed for Durability and Sustainability
Precast concrete provided a faster, safer, and more consistent solution compared to in-situ alternatives. The Humes Bebo Arch can be tailored in size and finish, with fittings incorporated during production for project-specific enhancements.
To support sustainability targets, Humes incorporates up to 50% supplementary cementitious materials (SCMs) including flyash and slag reducing embodied carbon while maintaining long-term durability. This approach ensures the Bebo Arch delivers strong environmental performance alongside efficient construction outcomes.
