Ngauranga Gorge project

Wellington Water, on behalf of Greater Wellington Regional Council, will soon be working to install an earthquake resilient pipe connection at Nguaranga Gorge. This key pipeline brings water from Hutt Valley to Wellington City. Work is scheduled to start on 2 March and completed by 7 July.

Once the new pipe connection is installed, it will increase the pipeline’s ability to absorb differential movements during an earthquake, providing additional protection to the pipe. This is particularly crucial as this connection runs parallel to the Wellington Fault and could be vulnerable during a major earthquake.

During this work there will be periods when the SH2 slip lane from Hutt Road will be closed overnight (8pm till 6am). Please follow the indicated detour which takes traffic up the SH1 a short distance towards Porirua with a turnaround to direct traffic back towards the Ngauranga interchange. The bus stop will be closed for this period of work. Please follow signage and drive with caution while driving through this section.        

Road closures will take place between 8pm and 6am;
*    overnight between 2 and 18 March - to install additional guardrails at the work site
*    between 23 March and 8 April – there will be approximately 5 nights work within this timeframe to install
     long stabilisation piles which allow us to safely excavate the pipe. 

This work is likely to create some noise disturbance however we will endeavour to reduce this where possible.

Water shutdowns of the pipe are scheduled for 28 May and 11 June. These shutdowns will not impact the water supply as there is reliable local storage. These shutdowns will begin in the early hours of the morning and require temporary traffic management to allow us to operate the valves safely. No lane closures are required while the pipe connection installation is underway.  

There will be further improvement works at the Ngauranga Interchange in the coming months by multiple agencies and contractors. Information about these works will be communicated with you closer to when the scheduled works are starting.

If you have any questions about this project, please contact: 
Jonathan Eweg, Design Lead on 027688 1917.