Mandurah Bridge Replacement – Mandurah, Western Australia.


Perth, Western Australia



Main Roads Western Australia


BG&E Perth
Mandurah Bridge Replacement

The $51.8 million replacement of Mandurah Bridge is part of a scope of works which encompassed decommissioning of existing bridge, designing and constructing a new bridge, and the associated roadworks and public amenities and infrastructure.

The existing structure was deteriorating and required an upgrade to expand capacity to two traffic lanes in each direction, improved safety for pedestrians and cyclists via a with separate and wider facilities over the bridge.

BG&E provided bridge design, and civil and structural engineering services for replacement bridge, which runs over the Mandurah estuary and into the surrounding marina precinct.

Our solution included adopting a unique curved soffit cross section constant along the full length of the 243-metre long bridge, resulting in a cost-effective landmark structure with a strong aesthetic appeal.

The bridge comprises six spans with 42metre long internal spans and 37.6-metre long end spans. The post-tensioned superstructure is supported on elegant columns, that are constructed on piled foundations.

The new bridge includes lower-level wide shared paths which enable greatly improved pedestrian experiences, such as fishing platforms, public art and landscaping.

The new Mandurah Bridge has increased traffic capacity and provides the community with an iconic structure and improved amenities in the heart of Mandurah.