Rocky Point Valve Chamber Upgrade

From July until October 2025, construction work will be taking place adjacent to SH2 between the BP truck stop and the Horokiwi turnoff near Petone, to replace valves in the water main pipe which will make it more resilient to potential earthquake damage. 

Wellington Water in partnership with Brian Perry Civil will be installing seismically resilient pipe connections at two points in the pipeline which carries drinking water from Wainuiomata into Wellington City. 

All lanes on both sides of SH2 will remain open during the construction, however there is a single lane over-night closure for the safety barrier relocation works. There will be no speed reductions in place. Signage will be in place to alert drivers. 

This pipeline feeds drinking water reservoirs in Wellington City, so residents should not experience any outage of water due to these works. 
This project will be followed by work at the Ngauranga Gorge intersection to install further valves. This will start in March 2026 for a period of about 16 weeks to beginning of July. 

Work adjacent to SH2 between the truck stop and Horokiwi turnoff, is a part of Wellington Water and Greater Wellington Regional Council’s work to safeguard our water supplies in the event of a large earthquake.

The pipeline bringing water from Wainuiomata into Wellington City running along the side of SH2, has been assessed by engineers and found that it could be vulnerable to liquefaction or lateral movement during a major earthquake. 

These improvements will replace pipes connections to build resilience in such a way as to allow the pipes to remain intact and working as intended during and after an earthquake.