Huia water treatment plant replacement - Manuka Road, Waima

Planning is underway to build a water treatment plant and two storage reservoirs in Waima, west Auckland

Start–finish: 2016–2023
Location: Woodlands Park Road, Waima (Titirangi)
Status: Planning

Planning is underway to build a water treatment plant and two storage reservoirs in Waima, west Auckland. The treatment plant will replace an existing plant that was built in 1928 and is reaching the end of its operational life. The reservoirs will increase the volume of water stored locally, improving the resilience of the wider water network and accommodating daily demand fluctuations. 

As with the existing plant, the new plant will treat water from four dams in the Waitakere Ranges. The water produced by the plant will feed into Auckland’s metropolitan water supply network, meeting the needs of 300,000 Aucklanders (around 20 per cent of the city's water needs).

The primary objective of the project is to replace the ageing plant. In doing so, we will ensure the continued resilience of Auckland’s metropolitan water supply network. This network is served by five treatment plants, numerous reservoirs and pump stations, and a highly-connected network of pipes. It means that if one treatment plant has an operational issue, the other treatment plants can meet the city’s water needs. Huia Water Treatment Plant is a vital part of this network.

The new plant will offer more advanced treatment processes and will be easier to maintain than the current plant. It will be carefully laid out to ensure staff can access each treatment process safely and easily.

What’s happening now?

The land on which we plan to build is owned by Watercare and has been designated for water supply purposes since 1972. This means that subject to Auckland Council reviewing and commenting on our plan of works outline, we can build a water treatment plant and reservoirs at any time. This plan of works outline will show the proposed buildings and layout of the plant. However, we need to seek resource consent to carry out construction work eg: earthworks, stream works and vegetation removal.

The proposal is to spread the project over three sites to minimise the volume of earthworks and impact on vegetation. The new water treatment plant will be built on the corner of Woodlands Park Road and Manuka Road. A reservoir will be constructed on the opposite side of Woodlands Park Road, and a second reservoir on the existing site once the old plant is decommissioned.

The three building sites will require the removal of 3.5 hectares of bush. Splitting the project into three sites will ensure that no kauri trees need to be removed. There are no known kauri (from seedlings to mature trees) within any of the three building sites. Kauri trees located adjacent to two of the sites will be protected using appropriate protection measures.

The proposal involves the excavation of the three sites. To ensure the earthworks do not cause the spread of kauri dieback, kauri protection protocols (applicable at the time) will be implemented. All work on these sites will be subject to management plans and will be developed in conjunction with Council, and where appropriate, interest groups.

Update: In August 2019, we submitted our resource consent application to Auckland Council. Council received 497 submissions - eight were neutral, 20 were in support of the project and 469 opposed the application. The hearing of the application (by independent commissioners) is likely to take place in early 2020. All those who made submissions will be contacted by Council re: the proposed venue, time and details.

For more information on the application, click here or contact Auckland Council.

alt=" "

Have your say About the proposed plant Engaging with the community

alt=" "
The current Huia Water Treatment Plant was built in 1928.