Oct 19 1980

Deep Creek Water Scheme Pipeline

Background.
The Deep Creek Water Scheme was built during the depression of the 30s.
The Pipeline is 58 years old and 64 km long.
The intake is 675m above sea level.
The catchment is 5420 hectares; mainly tussock with some grassland.
The steel pipeline, lined with bitumen, was in a bad state of repair by the 80s and the leaks were constantly plugged with tapered wooden plugs until it resembled a porcupine.
The authorities were eventually persuaded to renew the worst section, this being done with the aid of a helicopter in 1992. It is a useful supplement to Dunedin’s water supply.
The Pipeline is made of bitumen-lined steel excepting the first 1.4 km which was replaced in 1992 with concrete pipes.
Water quality is variable and often discoloured.
Over the 58 years the yield has dropped from 11,000 cubic metres to 6,800 cubic metres a day.
The water goes to Booth Road Treatment Station and Sullivans Dam.
Replacing the rest of the pipeline is estimated at $20,000,000 and would increase the flow to 17,000 cubic metres a day.
– From a hand-written record in the President’s file and supplemented with other data.

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