Port Road Drainage Upgrade
Stormwater upgrades to reduce flooding in one of Adelaide’s busiest road corridors.


In heavy rains, both Port and Woodville Roads in Adelaide’s western suburbs were prone to flooding. In a 1-in-100-year rainfall event, these major roads experienced knee-deep water, making them unusable and impacting on access to Queen Elizabeth Hospital, almost 4,000 homes, and a number of local businesses.

The Port Road Drainage Upgrade mitigates this flood risk by replacing the existing trunk mains in the Port Road central median with two parallel trunk mains between Old Port Road in Cheltenham and Park Street South in Woodville.


The project included the following works:

  • Replacement of the existing trunk main with two parallel stormwater pipes—900 m of 1650 mm diameter and 1.7 km of 1500 mm diameter. The new pipes were buried deeper than the existing trunk main
  • Installation of an irrigation pipeline carrying recycled water along the same alignment as the trunk main
  • Replacement of all side entry pits (SEPs) along the median and their associated laterals that connected them to the trunk main
  • Reconstruction of existing car parks
  • Identification and location of buried services along the alignment including relocation, where required
  • Irrigation for landscaping.

Key features

The project involved significant works in a busy transport corridor. Leed was careful in managing the impact upon road users, local residents and businesses, through judicious planning and staging of works, including weekend and night work.


The project involved major road crossings while maintaining traffic flows and working around major services.

The major road crossings included:

  • West Lakes Boulevard
  • Findon Road
  • Woodville Road.


Leed completed this project in September 2018 three months ahead of schedule, under budget and with an outstanding safety record.

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