• Central Interceptor
  • Central Interceptor

The Challenge:

In older parts of central Auckland, wastewater and stormwater flow into a combined network of pipes. When it rains heavily, stormwater can overwhelm these pipes. This means that wastewater overflows with stormwater into our creeks and streams. Watercare wants everyone to be able to enjoy clean waterways and open spaces.


The Outcome:

  • The Central Interceptor is a $1.2 billion wastewater tunnel designed to reduce overflows and help make Auckland’s waterways cleaner,
  • It will be the longest tunnel in NZ once completed, at 14.7km,
  • With a 4.5m diameter, it will take six years to drill. Work began in August 2019,
  • The tunnel will run underground from Grey Lynn to the Māngere Wastewater Treatment Plant with several link sewers and shafts along the route for collecting and transferring wastewater.

Our Involvement:

Resolve Group provided specialist risk management support to Watercare’s project team to identify and analyse key procurement and delivery risks. This included the facilitation of risk workshops, the anlaysis of findings and the compilation of the risk register for reporting to the project governance board. In meeting the needs of this project we drew on our specialist risk expertise, particularly in relation to tunnel projects within the Auckland region.