Redoubt Road reservoir expansion project

Construction of an additional water storage reservoir at the existing Redoubt reservoir complex.
Start-finish: October 2021 - 2024
Location: Redoubt Road and Mill Road, Manukau
Status: Completed

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The project

Tamaki Makaurau is predicted to grow by 700,00 to 1 million people over the next thirty years, and with it the demand for water will increase. While we are actively working on bringing on water sources to make Auckland’s water supply more resilient, we also need to increase our treated water storage capacity. The Redoubt Road reservoir site currently has two large reservoirs holding 120 million litres. The addition of a third reservoir, able to hold 45 million litres, will help future-proof Auckland’s water supply and cater for the region’s growth. The expansion project currently involves the construction and connection of a new reservoir and the establishment of an access road off Mill Road. The project was completed in two stages:
 
  • Stage One - Oct 2021-mid 2022
    Earthworks to establish an additional access road off Mill Road, Manukau (see red line on map below)

  • Stage Two - mid 2022-2024
    Construction of additional water storage reservoir (green shaded box on the map below)

map of redoubt road reservoir expansion project

What is the latest
 
 
 

March 2024 - The third reservoir is in service and feeding the network

Holding up to the equivalent of 18 Olympic-sized swimming pools of water, it gives us greater flexibility in operating the site and more security over Auckland’s water supply. It will also play a major role in supporting the city’s projected population growth.

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December 2023

The third reservoir structure is undergoing comprehensive testing to ensure water tightness and quality standards. This process is critical to ensure we can deliver on our commitment of providing safe, reliable water to Auckland. While we get the reservoir ready to bring into service, work is continuing across the site including the completion of external stair access into the reservoir, site drainage, backfilling, and preparing to de-mobilise from site by mid-year. The expectation is that the reservoir should be fully commissioned by mid-March. Once it is up and running it will hold 45 million litres.

Constructing the third reservoir


Since things kicked off in November, our team and contractor have moved more than 200,000 tonnes of clay material. The majority of that has been redistributed to fill zones across the site, and 50,000 tonnes is being reused at Te Motu a Hiaroa / Puketutu. This reuse approach helps us reduce our carbon footprint while respecting our Te Ao Maori value of what is given by the land should be returned to the land / He taonga nō te whenua, me hoki anō ki te whenua.


What you're watching is the enabling works - the moving and shifting earthwork stage of the project. With more than 80 per cent of Auckland’s daily treated water supply passing through the site each day, this is an important part of the water infrastructure network.


The design walkthrough video lets you explore the site and shows the enabling earthworks being undertaken by our construction partner, Fulton Hogan.

Any questions?

If you have any questions regarding this project, please contact us at [email protected]

Newsletters

Redoubt Road Reservoir project newsletter December 2022
Redoubt Road Reservoir project overview May 2022
 

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We take our commitment to our customers seriously. We know that our infrastructure projects can at times be disruptive, so our team always tries their best to mitigate any potential issues and respond promptly to complaints. We want to make sure that we are continually improving how we deliver our projects to better benefit Auckland’s communities. Please let us know what we did well and where we can do better. Click the button below.

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