were also taken from consumers premises and public standpipes, 99.69% of 1,814 samples taken from taps connected directly to water mains, and 96.9% of 1,038 samples taken from taps fed via private storage tanks being free from coliform organisms. These results indicated that the purity of supply was markedly better than target standards recommended by the World Health Organization.
CONSULTANTS LIAISON UNIT
Senior Engineers:
N. T. WHITWORTH, B.Sc. Tech., C.Eng., M.I.C.E., M.I.Mun.E., M.I.W.E.
General
S. K. KWEI, B.Sc. (Eng.), C.Eng., M.I.C.E.
10.75 The Unit is responsible for liaising with the consulting engineers engaged on water supply schemes, other than desalting. Expenditure during the year amounted to over $70 million.
High Island Water Scheme
10.76 Site investigation for the dams and tunnels was completed and the large scale trials to obtain design data for the dams were satisfactorily concluded.
10.77 Contracts for 7 miles of access roads were substantially completed. Contracts amounting to $300 million were awarded for, and work commenced on, the eastern and western tunnels and intakes. Construction of the eastern part of the tunnel system is supervised by resident staff of the consulting engineers and the western part by engineers of the Waterworks Office.
10.78 Work was well advanced on the construction of staff quarters, police posts and similar associated works.
Raising of Plover Cove Dams. Uprating and Extension of Sha Tin Treatment Works and Pumping Station and Tai Po Tau Pumping Station
10.79 Raising of the dams and associated works required to increase the capacity of Plover Cove Reservoir from 37,378 million gallons to 51,778 million gallons continued substantially on schedule. Work is expected to be completed early in 1973.
Page 149
Page 149