Wainihinihi Tunnel Alignment Hokitika

Wainihinihi Tunnel Alignment Hokitika
Realignment of a 185m length, 3m x 3m tail race tunnel.
Power and electricity
Project rectified collapse of existing tunnel section.
“Overcoming the difficulties of a remote location.”

This project involved the realignment and new construction of a 3m x 3m x185m of tailrace tunnel due to a previous section of the existing tunnel collapsing.

The tunneling method was drill and blast and temporary support was provided by a variety of rock bolts, mesh, steel sets and timber support. Permanent in-situ concrete secondary lining was also installed following installation of ground support.

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