Construction on New Zealand’s largest transport infrastructure project is about to celebrate a significant milestone with the cutover of the Huia 2 watermain in Mt Eden.
After months of ongoing disruptive work, the final stage of this complex relocation is poised for completion.
Due to its size and water capacity, the Huia 2 watermain is an important pipe for the local area water supply. As part of the CRL project, two portions of this pipe needed to be relocated. At Covid-19 Alert Level 3, the cutover can commence and this critical utility relocation is now underway.
The cutover is literally when the existing and new pipes are welded together after a stringent process of testing, draining, cleaning and finally joining. Once this is complete, the new pipe will carry the water and the old pipe is redundant.
The cutover is not only a milestone due to the complexity of the work but it also marks the completion of a significant body of disruptive work, which has spanned several months.
The first portion of the pipe is a 150.0m section located in Fenton Street.
The location of the yet to be built, Fenton/Ngahura Street pedestrian bridge and the realignment of the North Auckland Rail Line meant that the pipe interfered with the substantial groundworks required for these structures and therefore needed to be moved.
The second portion is a 180.0m section of pipe located on Nikau Street, between Ruru and Korari Street.
Construction of the concrete trough that will contain the CRL tracks needs to commence and the Huia 2 relocation enables this work to proceed. The move will place the new sections of the pipe underneath the new station building and the concrete trough housing the realigned track.
The Huia 2 is considered a critical piece of infrastructure and runs approximately 15 kilometers from the initiation point at the Huia Treatment Plant in Titirangi, to the Khyber Pass reservoirs. At 1.3metres diameter, the watermain is on the larger size of the treated water pipes in Auckland.
Completion of the new Huia 2 watermain will ensure that Watercare Services Limited can continue to provide uninterrupted, high-quality water to the local area and enable the work on the City Rail Link project to proceed. We are looking forward to celebrating this fantastic milestone!
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