The Mechanical Division have been involved in designing the pipe installation method. They have pipe welders on-site to install the pipe which was spooled at the McConnell Dowell mechanical yard. The concrete pipe is lined with a steel pipe fitting which is welded to the inside. The Mechanical team have fabricated service brackets in the tunnel, which are used during the MTBM operation to hold all services inside the tunnel. The services brackets are specifically designed to keep services off the tunnel floor and are specially fabricated for every tunnel. They have also fabricated all the slurry pipes to transport slurry from the cutter head of the MTBM to the separation plant. Hunua 4 Section 11 (continued) Inside the tunnel showing the service brackets Lowering of the MTBM Amiria into a shaft
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