Warroo Bridge Replacement
Abergeldie, in collaboration with Transport for NSW, successfully delivered the new Warroo Bridge. This three-span, 56.65-metre-long pretensioned concrete super-T bridge provides a stronger, safer and more resilient crossing over the Lachlan River on Warroo Bridge Road, 46 km west of Forbes and 55 km south-east of Condobolin.
As the only major crossing linking Lachlan Valley Way and Henry Parkes Way, the new bridge provides improved access for wide vehicles and increased load capacity for heavy vehicles. Designed for strength and durability, it delivers a smoother and safer journey while supporting long-term regional connectivity.
Scope of works
The scope of works included:
- Protection of existing services.
- Bulk earthworks, including excavation and site preparation for bridge foundations and approaches.
- Construction of piers and rock platforms within the waterway on both riverbanks.
- Construction of abutments, wingwalls, and approach slabs.
- Construction of the new reinforced concrete bridge with driven steel tubular piles, reinforced concrete columns, headstocks, and abutments supporting precast super-T girders.
- Reinstatement works, including removal of all temporary working platforms from the waterway.
Innovation and complexity
The regional location of the project presented challenges for procurement, site access, and flood risk management. From the outset, meticulous planning ensured materials were sourced efficiently, and the team actively fostered strong, collaborative relationships with local subcontractors and suppliers. Given the bridge’s location in a flood-prone area, the team carefully considered how to maintain safe, reliable access throughout construction. To manage flood risk and minimise potential delays, the team implemented elevated temporary access systems, allowing crews to safely access the bridge structure at all times. Materials and equipment were stored on elevated ground above the high‑flood level, significantly reducing disruption during flood events. This approach supported efficient delivery while strengthening connections with the Forbes community and surrounding areas, leaving a positive legacy.
Reducing waste through innovative material reuse
The team prioritised sustainability through the reuse of materials on site. Temporary rock platforms constructed within the river were designed for reuse as permanent scour protection for the bridge. In total, approximately 2,300 tonnes of rock was reused, significantly reducing waste, avoiding landfill and minimising the need for additional imported materials.
The project also donated surplus construction materials to local farmers, benefiting the community while further reducing environmental impact.
Future-proofing the road network in regional NSW
The new Warroo Bridge is a key investment in safer, more reliable infrastructure for the Central West. The bridge offers wider lanes and improved road approaches, enhancing safety and accessibility for road users.
With improved durability and reduced long-term maintenance requirements, the completed bridge will provide lasting benefits for the community while strengthening connectivity and resilience across the broader regional road network.