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The Cyclopedia of New Zealand [Otago & Southland Provincial Districts]

The Shag Point Coal Mine

The Shag Point Coal Mine . The mine is opened up to a depth of 405 feet, from which drives have been extended 1050 feet under the sea. Six seams varying in thickness from two feet six inches to eight feet have already been discovered and large quantities of coal are regularly shipped to the colonial markets. The machinery is worked from two large Galloway boilers, built page 452 by Sparrow, of Dunedin. Each boiler is about forty horse-power and is worked to a pressure of sixty pounds to the square inch, with a nominal capacity of 120 pounds. The winding engines are of thirty horsepower, and the engine is a double cylinder horizontal. At the bottom of the pit there is a Grange double direct acting engine of forty horse-power. At 140 feet below the surface there is one of Tangye's special pumps, which will throw to the surface 10,000 gallons of water per hour. The mine is regularly worked for two shifts of eight hours per day.