The Southern Gateway Alliance was formed by four alliance partners Leighton contractors, WA Limestone GHD and Mainroads back in late 2006 to construct and design Western Australia’s largest ever road project. The extension of the existing Kwinana Freeway, an additional 70km to effectively join the Old Coast Rd and the city of Perth. The project required 9 million cubic metres of material to be placed the construction of 19 bridges 16km of culvert and 50km of fencing. It has 6 major interchanges and 12 intersections.
Insight Survey involvement:
Client: Southern Gateway Alliance