Page:Municipal Handbook of Auckland 1922.djvu/175

 The service reservoirs, seven in number, are situated at Arch Hill, 232 feet above H.W.M.; Ponsonby, 232 feet above H.W.M.; Khyber Pass (two reservoirs), 310 feet above H.W.M.; Mount Eden (two reservoirs), 498 feet above H.W.M.; and Mount Hobson, 484 feet above H.W.M., having a total capacity of 15 million gallons. The gravitation mains are 25 miles in length, and consist of 7 miles of 27 inches diameter, 9½ miles of 24 inches, 2½ miles of 21 inches, 3 miles of 20 inches and 3 miles of 18 inches. The reticulation mains cover 158 miles and vary in diameter from 12 inches to 4 inches.

The capital invested in the undertaking is £715,211 12s 7d, and the gross revenue £73,534 1s 3d. The average ratio of management expenses to revenue is 16%. The capita consumption is 56 gallons, which compares very favourably with any city in Australasia.