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Evening Post, Issue 29, 4 February 1935, Page 10

the reservoir remains quite watertight.

During the work under compressed air, very great care was taken of the men's shelter, only speciaTz-selected men tinder 40 years of age were allowed in the air locks and all decompressing was controlled automatically to prevent men in their hurry to go off shift reducing the pressure too rapidly. A total of 32,000 shifts was worked under pressures up to 351b per square inch with a total of 96 cases of caisson disease, or "bends," including many very slight ones. The total capacity of the reservoir is 3,000,000,000 gallons. Three: thousand millions, which divided into a cost, of over £1,350,000 gives £450 per million gallons stored. It is interesting, to compare this with- the, Morefon. dam at Wainui-o-mata where :an • expenditure slightly over £53,000 gave a storage capacity of 107,000,000 gallons equalling £498 per million stored, or Karori where £29,000 stored 62J million or a per million cost of £465. The Public Works Departments-reservoir at Manorburn, Central Otago, where £45,000 stored over .eleven thousand million gallons, or only about £4 per million stored can in comparison be regarded as phenomenally fayo.urable.