Project Description

The Central Interceptor is a critical piece of Auckland’s future infrastructure, essential to ensuring water quality for generations to come. The main tunnel is 4.5m in diameter and 13km long, with two 2.5m diameter link tunnels. As subconsultants to Tonkin and Taylor and supporting a consortium of Fletcher Construction, McConnell Dowell and Obayashi, RBG were responsible for tender design of 17 shafts that ranged in diameter from 4.5m to 16m and in depth from 16m to 80m, and varied considerably in material, construction methodology and complexity. Along with Structural Engineering, Construction Engineering services, RBG produced 3D visualisations of construction methodology to support the bid.

Subsequently, RBG have been engaged by the successful tenderer (Ghella-Abergeldie) for construction engineering services to facilitate enabling works and the new build.