McConnell Dowell is pleased to announce that Westland Milk Products has awarded McConnell Dowell the contract for the design and construction of the Westland Milk Ocean Outfall (Package 2) at Hokitika on the West Coast of New Zealand’s South Island.

The works consist of;

  • 800 m new trenchless pipeline using the Direct Pipe® system installing a 1.2m diameter steel pipe as the carrier pipe.
  • A 500NB HDPE product pipe.
  • A diffuser structure with a twin diffuser manifold.
  • Installation of the onshore de-aeration chamber.

The offshore pipeline is part of the overall scheme to re-direct the WMP waste flows from discharging into the Hokitika River to a more acceptable offshore location.

This project continues to build on McConnell Dowell’s extensive track record in the construction of major marine outfall pipelines in New Zealand. Our solution is to use trenchless tunnelling technology to minimise the risk of construction under the seabed with relatively unknown ground conditions, leveraging our experience from the recently completed Army Bay Outfall Pipeline where we successfully made use of the Direct Pipe® system.

McConnell Dowell Managing Director for New Zealand and the Pacific Islands, Fraser Wyllie says that “McConnell Dowell has a strong track record of delivering award-winning marine projects and particularly ocean outfalls in New Zealand, which have greatly contributed to improving water quality in our harbours and waterways. We look forward to doing this once again in the beautiful West Coast town of Hokitika.”

Construction will commence in January 2020, and completion is scheduled for January 2021.

To read more about the project click here