McConnell Dowell is pleased to announce that Auckland Council Healthy Waters will once again partner with McConnell Dowell to deliver their newest stormwater project in Tāmaki Makaurau, Auckland. 

The Corban Reserve Stormwater Upgrade Project is to install a new 713m stormwater pipeline under Border Road in West Auckland using a 2100m in diameter micro–Tunnel Boring Machine (m-TBM).

Once completed, the new pipeline will reduce flooding in the area, increase capacity within the network to allow for future growth, and protect and enhance both Opanuku and Waitaro streams. It will also prevent landfill gases and leachate entering the stormwater network, making it safer to maintain.

McConnell Dowell has a proud history constructing and delivering stormwater pipelines in New Zealand and around the world, using innovative trenchless methodologies. Earlier this year we successfully delivered the St Marys Bay Area Water Quality Improvement Project on time and on budget in partnership with Auckland Council Healthy Waters. The same team will now bring their expertise and winning strategies to this project to ensure that we once again deliver a successful outcome.

The micro-Tunnel Boring Machine (m-TBM) used on St Marys Bay will be upcycled for this project to tunnel from Imperial Place to Border Road. This is an environmentally complex build with residents, local schools, native wildlife and fauna, and park users all neighbouring the three worksites. The project team has carefully designed the methodology and construction programme to take into account the intricate ecological and man-made surroundings.

Work beginning early next year will include:

  • Piling works for both the inlet and outlet shafts
  • Excavation works for both shafts
  • Mid-chamber shaft and structure works
  • Tunnelling under Border Road
  • Inlet and outlet structure works
  • Waitaro Stream works

This project is expected to be completed in 2024.