Yearly safety improvement on SH6 for NZTA – Nevis Bluff near Queenstown

 In association with Downer Edi Works and Opus International, we have scaled and blasted 2 rock features from the  230m high face: Epsilon VI and the Lower West Column for a total amount of 35 cubic meters.
These features that are regularly monitored by Opus, were highly fractured and threatened the road and traffic below.

Epsilon VI direct access on rigging
    
Setting up one of the three blast wirings at Epsilon VI.                          Click to enlarge

After the rock removal, we have drilled, installed, grouted and tested 10 rocks bolts (between 4.5 and 9 meters deep) at 100 meters high  on the West column. 

Also for reinforcement purpose, we then carried out a complete installation of a mesh on the Lower West Column, in a very overhanging zone. The location of anchors is carefully chosen to make sure the mesh fits well.

Click to enlarge

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We want to thank the road users for their patience that allowed the State Highway 6 to be safer between Cromwell and Queenstown.

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Quickly done, Well done!

Lindis Pass road is exposed to some rocks from bluffs near Camp Creek.

Lindis oct 09 (DAS)
Lindis oct 09 (DAS)

Once again, helicopter sluicing and scaling by abseiling means have successfully permitted us to get rid of a few truck loads of rocks overhanging SH4 near Lindis Pass.

We made in five days the work planned for ten, to the satisfaction of Opus consultants . Thanks to NZTA maintenance manager from Downer EDI Works and the road management team who did a very professional work.

Lindis2