Harihari Hopper Power Project

One of the more satisfying projects we encountered in the past was a Hydro Scheme at Harihari in the South Island.

The actual development was to build a tunnel from the valley floor up to a lake near the top of the hill covered in Native forest, tunnels distance was approx. 1 km and 6m in diameter.

At the bottom of the tunnel a powerhouse was built in the bush and the water would come down the tunnel and through the turbine, being discharged in the local stream.  Once completed there was no way anyone would ever know it existed.

It is a lovely example of how we can harness sustainable energy with minimal impact on the environment.  There were 5 of these types of installations happening on the Coast.

Our involvement was to provide a Hopper that was weighed so product could be weighed and recorded as loads were removed from site, during construction.

As the tunnel was so small the digger could not turn around so the driver would drive in and pick up a bucket full of spoil, then back down the tunnel and dump the spoil in the hopper.

Indicator lights would tell the driver when the hopper was full enough for a truck load. These lights would also tell the driver when the hopper had been emptied by a truck. This would enable the site to be worked by one person. Great setup.

A neat job, with real smarts for the whole project.

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