Twentyfirst Street Bridge upgrade
BMD, in partnership with Tonkin, delivered a design and construct solution for an upgraded Twentyfirst Street Bridge – restoring vital community connectivity and enhancing long-term flood resilience.
This new bridge replaces the original load-limited structure over Bookmark Creek, which was closed to the public after sustaining significant damage during the 2022/2023 River Murray Flooding event.
The design achieved a balanced solution that optimised engineering performance, prioritised user safety and delivered cost efficiencies, while also addressing water flow constraints and improving access for pedestrians and vehicles.
Project statistics
100%
of demolition works completed by local subcontractors
100%
of earthworks completed using local materials and subcontractors
100%
of drainage installation completed by local subcontractors
Over 20%
of the contract value spend on local subcontractor and suppliers, valued at $1.1 million
12
direct local subcontractors
20,000 tonnes
of materials sourced locally