Bridge over Collie River


Latest news

Construction is on schedule as the 224-metre bridge over Collier River is nearing completion, with the final launch of the steel bridge beams expected in late September.

Once all bridge beams are launched, remaining works will be centred on finishing the concrete decks and the asphalt road surface on the deck. The bridge works will be completed with installation of bridge lighting, parapet panels, guardrails and the Possum Rope structures, which will then allow the Shires of Dardanup and Harvey to complete the approach roads. Coordination of construction activities in relation to the approach roads are currently underway with the respective Shires.

More information about the completion milestone for the bridge launch and the latest works will be made available in our next newsletter in October. Our July newsletter is available here.

Image: Treendale Bridge image thumbnail - September 2017.JPG


Project objective

The bridge will provide a much needed connection between the Treendale and Kingston subdivisions in Australind, Millbridge Private Estate and the Parkridge Estate in Eaton, linking both Shires.

Millbridge and Treendale are two of the fastest growing areas in Western Australia and connecting the two areas is critical to the road network and interconnectivity of the Shires of Dardanup and Harvey.

As well as providing a key social connection, the bridge will offer essential access for emergency service vehicles and connect the commercial precincts of the two subdivisions.



The new bridge will be located 3 km north-east of the Eaton Fair Shopping Centre and approximately 1.5 km south of the Treendale Shopping Centre in the Shire of Harvey.

The project comprises of the following main components:

  • Two lane steel/concrete composite bridge structure, 224 metres long and 14.4 metres wide including bridge lighting and a pedestrian walkway on the western side.
  • The Shire of Harvey will extend The Boulevard to connect to the bridge, and construct a fauna / recreational path under the bridge.
  • The Shire of Dardanup will extend Eaton Drive to connect to the bridge, and construct a fauna / recreational path under the bridge.
  • Possum rope structures on the right and left hand side of the main Collie River channel to facilitate the movement of possums along the watercourse subsequent to the bridge construction.

Minimal impacts are expected on the road network given the bridge is a new connection.



This new link will provide a direct connection and a third alternative route between the Shires, as well as:

  • Reduce the pressure on Forrest Highway and Old Coast Road and improve safety. (Old Coast Road's average daily traffic is currently close to full capacity).
  • Provide faster access for emergency service vehicles resulting in critical time savings.
  • Reduce travel time for private and commercial vehicles.
  • Reduce travel distance between the Millbridge and Treendale communities by approximately 10 km (residents currently travel via Forrest Highway).
  • Provide a link between the commercial precincts of the two subdivisions and Shires.
  • Improve road infrastructure to the growing light industrial area in Treendale.
  • Travel time and cost savings for road users travelling between Eaton and the Treendale shopping precinct.
  • An opportunity for improved bus services with shorter travelling times.
  • A direct pedestrian and cycling link.





An Environmental Management Plan has been developed to manage potential impacts on issues including Western Ringtail Possum, water quality, acid sulphate soils management, topsoil and weed management.


Further information

Community queries can be directed to:

Carolyn Walker, Community Relations Consultant

Phone: 138 138



Contracting or supplier enquiries

Phone: 138 138



Modified: 13 Oct 2017