NEW POWER SCHEME
BUILDING LARGE TUNNEL TWENTY-FIVE- FEET IN HEIGHT Construction operations on the site of the Karapiro hydro-electric power scheme are now in full swing, and one of the two shafts being sunk through solid rock has about reached the level when a start on the diversion tunnel can be made. This .tunnel, which trill carry the flow of the Waikato River when the coffer dams are built, will be 1000 ft. in length, and it will be necessary to burrow it "through rock to a width of 27ft. and the same height. When concreted it will be about 25ft. by 2oft. Railway tunnels are usually not more than about loft, in height, so the size of a tunnel designed to carry ' the flow of the river whether in flood or not will be appreciated.
Excavation on the site of the dam has also been started, but the workers are not yet down to formation of the access road from the main highway to Rotorua has been completed, but all the surface has not yet b°en metalled. It will be a public road, so that it will soon be possible to inspect the progress of operations now employing about 150 men, who will eventually be increased to about 500.
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Bibliographic details
New Zealand Herald, Volume LXXVII, Issue 23769, 24 September 1940, Page 6
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210NEW POWER SCHEME New Zealand Herald, Volume LXXVII, Issue 23769, 24 September 1940, Page 6
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