Hunua 4 Watermain, Sections 1-10

This project saw John Holland and joint venture partner, Fulton Hogan, build the largest potable water transmission pipeline in New Zealand, through Auckland city, from Manukau to Onehunga, to ensure security of future water supply and to cater for population growth.

The project involved the construction of the largest potable water transmission pipeline in New Zealand. The 1,575mm – 1,965mm CLS pipeline stretched 28km from the Redoubt Reservoir complex in South East Auckland, through the suburbs of Southern Auckland and Onehunga before completion at Market Road in Epsom. The scope included a pipejacked tunnel under the Southern Motorway, three pipe bridges and installation & commissioning of mechanical and electrical control systems.