Q 75
(c) Pokfulam Water Supply.
104. Up to the present the whole of the Pokfulam area including the Dairy Farm has been supplied with unfiltered water from the raw water conduit from Pokfulam reservoir to West Point filters and a scheme has been prepared to convert the supply to filtered water.
105. This scheme consists of pumping water from Pokfulam reservoir to a new slow sand filter plant on a site above and to the west of the reservoir. From the filters the water gravitates into the service reservoir, to which the distribution system is connected. A connection will be made to Queen Mary Hospital tank to provide a standby supply for the hospital in case of failure of the supply from Pokfulam Road pumping station.
106. The various parts of the scheme are:
(1) Four concrete slow sand filter beds with a cope level of 719.25′ A.P.D. and a total filtering capacity of 400,000 gallons per twenty-four hours.
(2) A covered concrete service reservoir with a T.W.L. of 710.75′ A.P.D. and a capacity of 272,000 gallons adjoining the filters.
(3) A brick pump house below Pokfulam reservoir.
(4) Two pumping units in the pump house, each consisting of a "Harland" multi-stage centrifugal pump capable of delivering 120,000 gallons per twenty-four hours to the filters and driven by an 11 H.P. 350 volt "Harland" electric motor. Provision has been made for the installation of a third pumping unit at a later date.
(5) A 6″ pipe line about 1,200 feet long to connect the pumps, filters and Pokfulam reservoir.
(6) A 5″ and 4″ distribution main from the service reservoir about 4,000 feet in length.
107. The pumping units were ordered on Indent at a cost of £384-16-0 but had not been delivered by the end of the year.
108. Contract No. 55 of 1939 for $49,721.37 was let to Messrs. Cheong Hing Co. for the construction work in Items 1-3 above. Work was commenced on 1st December 1939 and good progress was made by the end of the year.
(d) New Waterworks Depot, Kowloon.
109. A new site was allotted near the Railway Bridge at Waterloo Road but nothing was done beyond the preparation of sketch plans.
IV. PUBLIC WORKS EXTRAORDINARY.
110. The costs of works carried out under the above head were charged direct to the respective votes.
(a) Buildings.
111. The fixing of new or alteration of existing inside services and connection to the mains were carried out for the following buildings: - Central Government Store; New Sub-station, Wanchai Gap; Ellis Kadoorie School; Government Civil Hospital, Alterations for Infant Welfare Centre; Latrine, Electric Road; and Prisons, Alterations.