• 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

Resolve Group provided risk management support to Watercare to identify and analyse key procurement and delivery risks