Auckland wastewater contractors shortlisted 15 Mar 2018

A shortlist of four construction contractors has been selected for the NZ$1.2 billion central interceptor construction contract of the Watercare sewer project in Auckland, New Zealand.

The short-listed construction contractors have been named as;

• CPB Contractors
• Ghella-Abergeldie Harker Joint Venture
• Pacific Networks, comprising McConnell Dowell, Fletcher Construction and Obayashi
• Vinci Joint Venture, comprising Vinci Construction Grands Projets, HEB Construction and Solentache Bachy.

“All four groups have demonstrated that they have the ability and experience to deliver this project to the required standard, while adding significant value to the project;” said Shayne Cunis, Executive Programme Director for the Central Interceptor.

Central Interceptor alignment in Auckland

“We are looking forward to working with them on the next stage of the process and remain committed to meeting our timeframes for delivery of the Central Interceptor for the people of Auckland.”

Design and technical documentation will be released in March, and the Request for Proposal will be issued to the short-listed contractors in May.

The 13km long x 4.5m diameter tunnel is designed to help reduce combined wastewater and stormwater overflows to local waterways and the Waitemata Harbour due to a growing population in Auckland. It is expected to reduce overflows by 80%.

The tunnel will run from Western Springs to Mangere Wastewater Treatment Plant at a depth of between 22m and 110m, connecting existing networks along the route via link sewers and will include 17 shafts at 16 locations. It will then cross 15m below the seabed at Manukau Harbour where it will replace an older deteriorating pipeline and provide scope for future development.