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Manukau Interchange

This landmark project involved three major interchanges, connecting SH20 (South Western Motorway from Mt Roskill to Wiri) through Manukau City to SH1, providing critical links to both the North and South. The scope included extensive earthworks, pavement construction, engineering, and drainage works, spanning four and a half years and valued at approximately $210 million.

We played a key role in assisting with final account negotiations and managing the financial split between the Joint Venture (JV) partners.

Project Highlights

Cost: $210 million

Duration: June 2006 to January 2011

Key Features:

  • 920,000 cubic metres of earthworks
  • 68,000 square metres of pavement
  • 4.5 km in length
  • 3 interchanges
  • 12 bridges
  • 5 motorway crossings over local roads, streams, and the main North Island rail line

This project was instrumental in enhancing connectivity and streamlining traffic flow between SH20 and SH1, significantly benefiting the Manukau region and beyond.

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