Warkworth Wastewater Scheme

Warkworth Wastewater Scheme

The Warkworth and Snells-Algies wastewater infrastructure project involves:

  • construction of a new wastewater treatment plant at Snells Beach 
  • upgrading the ocean outfall which will discharge treated wastewater approximately 600 metres off the coast, to the south of Martins Bay into the Hauraki Channel, and 
  • a new pipeline, along with new pump stations to take wastewater from Warkworth to Snells Beach to increase the capacity of the wastewater network. 

This project will be completed in stages over five to six years. The first stage of the project comprises the Snells-Algies wastewater pipe and outfall construction, comprising 6.5 kilometres of wastewater pipe.

Key Dates

Sep 2019 Construction Commencement: Snells-Algies wastewater outfall
Mar 2021 Construction completion: Snells-Algies wastewater outfall
Sep 2021 Expected Construction Commencement: Pump Station
Nov 2021 Expected Construction Commencement: Wastewater Treatment Plant
Jul 2022 Expected Construction Commencement: Servicing Pipeline
Sep 2022 Expected Construction Commencement: Transfer Pipeline
2025 Expected Construction Completion


Successful Tenderer: Stage One - McConnell Dowell


Apr 2019 Watercare awarded the Design and Construction contract for Stage One of the project to McConnell Dowell.
Sep 2019 McConnell Dowell commenced construction on the Stage One of the project, the Snells-Algies Outfall Pipeline.
Mar 2021 McConnell Dowell completed construction on the Stage One of the project, the Snells-Algies Outfall Pipeline.
Jul 2022 Auckland Council granted resource consent for the wastewater transfer pipeline from the Lucy Moore Memorial Park Pump Station in Warkworth to the new Snells-Algies Wastewater Treatment Plant.
Estimated Total Cost
Water & Sewerage
Procurement approach
Unconfirmed |
New Zealand |
Media releases