Sessional_Paper_1937 — Page 93

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99. At present there is no organisation for the systematic descaling of mains nor for detection and elimination of waste in the distribution system.

100. It is proposed to prepare a programme for dealing with these matters in due course.

Pumping Capacity-Mid-Level" and "Peak".

101. There are three pumps at the Pokfulam Road Pumping Station and the maximum output of two of them-the third should be kept in reserve-is approximate- ly 950,000 gallons per day. The heavy pumping duty at this station occurs in the dry season when the maximum daily requirements from here are:--200,000 gallons to "The Peak", 400,000 to the 750 ft. tank and 500,000 to West Point, making a probable "peak" total of 1,100,000 gallons per day. As two pumps cannot deal with this amount, the reserve pump has to be brought into use to make up the deficiency. With the addition of a supply of 100,000 gallons to the Queen Mary Hospital three pumps will be required at the same time, leaving no reserve pump for emergency.

102. The capacity of the Bowen Road Pumps which feed the Eastern end of the "Mid-level" zone is now utilized to its practical limit.

103. The Eastern Pumping Plant has been designed to deliver about 200,000 gallons per day from three of its four pumps, leaving one in reserve, of which quantity 70,000 gallons are available for the "Peak". This amount can be utilized to augment the Peak Supplies and is additional to the amount of 200,000 gallons re- quired from Pokfulam Road Pumping Station.

Proposed Extensions.

104. It is therefore recommended that in order to provide reasonable reserve of pumping the capacity of the pumps for supplying the Mid-level" and "Peak" areas be increased.

105. As the Extension of Pokfulam Road Pumping Station would involve considerable structural difficulty and as the water resources of the Western Source from which supplies have to be drawn, are limited, the proposed increase should be provided from the Mainland resources through a new rising main by means of pumps installed at the Albany Service Reservoir and delivering water to the pro- posed new tank at Peak Road. (para. 85).

106. The above change in source of supply would involve little alteration to the distribution system of the "Mid-level" zone. It would provide ample reserve of pumps for the Peak and Queen Mary Hospital supplies and would allow of the extension of the latter to the Pokfulam residential area whose supply at present, being of unfiltered water, is very unsatisfactory.

107. The provision of a filtered water supply for the Pokfulam area could be made at very small cost, extensions and reorganisation of the present distribution system with a new balance tank of 100,000 gallons capacity at the further extremity of the area, only, being required. The provision of this supply for the Pokfulam area is therefore recommended.

108. Alterations to the distribution system involving new principal mains would be required in the Eastern district consequent upon the future development in this area.

Distribution Areas-Kowloon.

109. The difference of level in Kowloon being very small the distribution areas are organised on a geographical basis. These are governed generally by the level of the filters for the two sources of supply i.e. Kowloon Waterworks and Shing Mun