WSP | Parsons Brinckerhoff is a design partner in the Well-Connected Alliance, which is building the $1.4 billion Waterview Connection – the largest roading project ever undertaken in New Zealand.

The Well-Connected Alliance will design, build and commission a new 3-mile (4.8-kilometer) six lane section of motorway that connects State Highway 20 (Southwestern Motorway) and State Highway 16 (the Northwestern Motorway). The Alliance will then operate and maintain this section of motorway for 10 years.

The Waterview Connection is the final link in Auckland’s Western Ring Route, which will be a strategic alternative to State Highway 1 and the Auckland Harbour Bridge for travel through and within the Auckland region. The Waterview Connection includes 1.5-mile (2.5-kilometer) twin tunnels under Auckland’s inner west suburbs; connections to the existing motorway network; six new road bridges; new and upgraded cycling and pedestrian infrastructure; new recreational facilities; community and environmental improvements.

The project features Australasia’s largest road tunnel, being constructed using a custom-built tunnel boring machine (TBM) called Alice. With a cutting diameter of 14.4m, it is the 10th largest machine of its kind ever built.

WSP | Parsons Brinckerhoff is providing design management; tunnel, fire and life safety, geotechnical and mechanical and electrical systems design services; and design support during construction. Parsons Brinckerhoff will continue as a partner for the operation and maintenance period.

Photo courtesy of Well-Connected Alliance.