McConnell Dowell to complete new wastewater treatment plant upgrade in Auckland


22 January 2019

McConnell Dowell is pleased to announce that the McConnell Dowell-HEB Joint Venture has been awarded a contract by Watercare to upgrade the Pukekohe WWTP in South Auckland. This award follows the successful completion by the Joint Venture of New Zealand’s largest wastewater upgrade since 2000 at the Mangere wastewater treatment plant.  

Similar to the award-winning Mangere BNR WWTP upgrade, this contract includes construction of three reactors, a chemical dosing facility, pump station, inlet works, and associated interconnecting pipework. This upgrade at Pukekohe will allow Watercare to meet the demands of a growing population by doubling the capacity of the plant. It will also improve water quality into the Parker Lane Stream – a tributary of the Waikato River.

Stage A construction will commence immediately with works scheduled to be completed by mid-2020. Stage B the conversion of the existing reactors into continuously operating Bardenpho reactors to be completed in 2021.

The Joint Venture’s ability to transfer an experienced, proven, and available team from Mangere BNR to Pukekohe was a key factor in winning the contract.

Visit this link to learn more about this project,




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