Hunua 4 Watermain

Watercare is planning to construct a new watermain to cater for population growth and to increase the security of the water supply.

The Hunua No. 4 Trunk Watermain (Hunua 4) will run for 30 kilometres from Redoubt North Reservoir in Manukau to Market Road in Epsom, connecting to the local water supply network along the way.

What is happening now?
Watercare has lodged Notices of Requirement with Auckland City Council and Manukau City Council, along with a package of Resource Consents with the Auckland Regional Council.

Once the councils have considered these applications they will be publicly notified.  This provides opportunity to make submissions on the proposed works and is expected to happen in May 2010.

While most of the construction work will take place between 2012 and 2016, work on the section that crosses the Manukau Harbour is being carried out now as part of the New Zealand Transport Agency’s Manukau Harbour Crossing (MHX) Project.

This involves installing a 700-metre-long section of pipeline under the the new bridge deck as well as laying sections of pipeline in Crawford Avenue and Onehunga Mall cul de sac.

The MHX Team will contact you directly if your property is along this route and you are likely to be directly affected by the works. For more information on the current construction work visit: www.nzta.govt.nz/projects/mhc


Above: Contractors install a section of watermain under the new Manukau Harbour Bridge.


Above: Contractors lay a section of pipe in Waterfront Road reserve in Mangere Bridge. This work is being undertaken now as part of the Manukau Harbour Crossing Project.

How will it be constructed?
Hunua 4 will be 1.3 to 1.9 metres in diameter. It will mostly be laid under the road though at times it will cross coastal streams, private property and rural land. Watercare is liaising with these private property owners.

For the majority of the route, open trenching methods will be used to lay the watermain. In sensitive areas – such as busy intersections and coastal areas – more specialised construction methods will be used, eg.tunnelling or pipe bridges.

Traffic around the construction site will be carefully managed to minimise disruption to motorists.

Timeline:

To date:
  • Engaged with the Auckland and Manukau city councils, the
    Auckland Regional Council, the Auckland International Airport, transport
    agencies and the local communities.
  • Commenced construction on the section that crosses the Manukau Harbour.
  • Lodged notices of requirement and resource consents.
2012 - 2016: 
  • Main construction programme.

 

 

 

 

 

For more information about the project, email the project team at hunua4@ghd.co.nz or phone Senior Environmental Planner Belinda Petersen on 09 539 7477.


Hunua 4 Newsletter Issue 1 (1037KB) New watermain to serve the Auckland region. Features route maps.