McConnell Dowell has announced construction on the new Ports of Auckland Outfall Upgrade Project will begin in late 2021.
The company was awarded the contract by Auckland Council in 2019 because of its extensive track record in marine outfall construction using trenches methodologies.
The project will construct the last and most challenging section of the Stanley Street catchment network to mitigate future flood risks.
Works will include culvert strengthening, excavation, chamber and outfall construction, and tunnelling to a maximum depth of 20 m.
The new outfall will increase the stormwater capacity and provide greater resilience to Auckland’s downtown infrastructure, particularly for the Britomart Railway Station.
A new 270 m inverted siphon pipeline will be installed using microtunnel boring machine (MTBM) with a diameter of 3 m.
The outfall alignment will run under Quay Street behind the Port of Auckland and the old stormwater culvert will also be repaired and reinstalled.
Once completed, the new outfall will improve the resilience of Auckland’s downtown infrastructure.
For more information visit the McConnell Dowell website.