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Source: Whangarei District Council

This page contains information about the contract being awarded to Broadspectrum (New Zealand Limited) to build the new Whau Valley Water Treatment Plant.

Updated: 13/02/2019 12:00 a.m.

​The contract for one of the largest Whangarei District Council civil engineering projects has been awarded to Broadspectrum (New Zealand) Limited. 

At a special Council meeting Whangarei District Council awarded the $26,977,568.29 plus GST contract to build the Whau Valley New Water Treatment Plant, to secure the urban water supply for decades to come. The new plant will be supplied with raw water from the existing Whau Valley Dam and the Hatea River.

Infrastructure General Manager Simon Weston said the new plant would increase the water supply from 15,000 cubic metres processed each day by the existing plant at 134 Whau Valley Road, to 22,000 cubic metres a day.  It would involve new filtration systems and the latest technology. 

“It will be modern, future-proofed, more robust and will provide greater resilience when it comes to water security. This is especially important considering the growth we are experiencing, and far greater challenges for those involved in the water supply business over the next few decades. 

“Council considered that future-proofing our drinking water system was of paramount importance, and the new plant will provide this for decades to come. 

“It has been a long and involved process to bring us the point where the contract can be awarded, and I want to thank everyone who has been involved from the original concept, through the investigation, land acquisition, designation, design and planning.”

Council also agreed to sell a piece of land (213 Whau Valley Road) which it had purchased in case it would be needed as site for the new plant. A better site at 270 Whau Valley Road was later selected and designated, so the 213 Whau Valley Road site will be offered for sale on the open market. The proceeds from the sale (which must be no less than market value) will be transferred to the Whau Valley New Water Treatment plant project. All necessary resource consents have also been granted by the Northland Regional Council.   

Meanwhile, the existing plant that has been providing water to Whangarei for more than 60 years will continue to operate until the new plant is up and running, after which a decision will be made about its future decommissioning.

“Earthworks will begin on the new site late in February and the build, including treatment processes and amenities building and extensions of pipeline along Whau Valley road to connect to the existing reservoir, should be completed by the end of 2020.