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Vinci and Bachy JV shortlisted for NZ largest-ever wastewater tunnel

A Vinci Construction Grands Projets, HEB Construction and Solentache Bachy JV is one of four contruction contractors, short-listed earlier this year to build one of New Zealand’s most ambitious tunneling projects. 

The tunnel - The Central Interceptor - is a 4.5m diameter wastewater tunnel designed to help reduce combined wastewater/stormwater overflows to local waterways and the Waitematā Harbour, along with providing system resilience and additional network capacity for a growing Auckland.

With construction set to start in 2019, the NZ$1.2bn (£610M) Central Interceptor is one of New Zealand’s most ambitious tunnelling projects. Constructed at depths of up to 110m, the tunnel will run 13km between Western Springs and the Māngere Wastewater Treatment Plant.

Connecting to existing networks along the route, flows and overflows will be diverted into the tunnel before it crosses the Manukau Harbour below the seabed.

Watercare executive programme director for the Central Interceptor Shayne Cunis said: “We’re running a tight ship here. Keeping to schedule on this critical project is crucial for the industry. There is a lot at stake – these contractors and all interested parties need certainty and confidence in the process and timeframe.

“Our intention has always been to stick to our plan. We do what we say and the people of Auckland can take comfort that Watercare is delivering on its promises of improving Auckland’s infrastructure.”

Central Interceptor NZ

Central Interceptor NZ

The short-listed construction contractors will have an official tour of the tunnel route later this month.

The contractors’ proposals are due by 14 September, and the winning bid will be announced in February 2019.

Short-listed contractors are: CPB Contractors, Ghella-Abergeldie Harker Joint Venture, Pacific Networks, comprising McConnell Dowell, Fletcher Construction and Obayash, and the Vinci Construction Grands Projets, HEB Construction and Solentache Bachy JV.

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