Department of Infrastructure, Transport, Regional Development, Communications and the Arts

Port Augusta to Perth (WA) – Great Eastern Highway – Walgoolan to Southern Cross and Coates Gully

Funding Program:Roads of Strategic Importance
Status:Under construction
Transport Mode:Road
Expected Start/Finish:Late 2021 - Mid 2023
Estimated Project Cost:$40,500,000
Australian Government Contribution:$32,400,000
Local Council/Shire:Shire of Northam,Shire of Westonia,Shire of Yilgarn
Corridor:Perth - Adelaide

Project Description

The project will upgrade three sections, including:

  • Walgoolan Southern Cross: Replace Bridge 0629 offline, and realign the road approaches
  • Walgoolan Southern Cross: Widen Bridge 0630A online, and widen the existing road approaches
  • Coates Gully Section: Replace Bridge 0605, 0606 and 0607, widen and improve geometry of the existing road approaches, and provide the formation for overtaking lanes.


  • Improved road safety for all road users
  • Improved freight productivity


The Australian Government has committed $32.4 million towards the $40.5 million project.


Construction started in September 2021 and is expected to be completed in mid 2023.

Disclaimer: The material contained in this site is made available on the understanding that the Department is not thereby engaged in rendering professional advice for a particular purpose. Before relying on the material in any important matter, users should carefully evaluate the accuracy, completeness and relevance of the information for their purposes and should obtain appropriate professional advice relevant to their particular circumstances.

Project details last updated: 2/08/2022