Port River Expressway

The Port River Expressway is a four-lane expressway development to link between Eastern Parade and South Road with a stretch of more than six kilometres.

Tonkin Consulting was the lead design consultant for the Bardavcol/York Civil Joint Venture for Stage 1, designing the significant grade separated interchanges. The site had challenging conditions such as geotechnical and subgrade site conditions to be addressed.

Tonkin Consulting prepared the detailed pavement design for six kilometres of a multi-lane roadway to withstand the high percentage of heavy vehicle use. The pavement design solution incorporated the pre-loading of the weak subgrades and extensive replacement of the subgrade using mixing of site solids to manage the construction settlement and construction costs.


The project won a state and national award for environmental excellence as the expressway passed sections of previous landfills, wetlands and six of Adelaide’s major stormwater outfalls.

  • National Winner – Category 3 – Environmental Excellence (projects over $15 million) 2006
  • South Australian Winner - Category 3 – Environmental Excellence (projects over $15 million) 2006

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