97. Intensive redevelopment of the City areas and further expansion of urban development coupled with infiltration of sub-soil water and the entry of too large a proportion of rainwater has overtaxed some of the older foul sewers and surveys were carried out with the view to effecting some relief.
98. Investigations have been made concerning the 'no W.C. area' in Kowloon which drains into the Yaumati Typhoon Shelter with a view to formulating a scheme to enable buildings in the area, estimated to house 100,000 persons, to abandon the conservancy system.
99. The intercepting sewer laid in the main Kai Tak nullah in 1949 improved the situation then obtaining. However the increased quantity of waste water from squatter areas now discharging into the nullah and the increased flow in the intercepting sewer have again brought about an offensive smell which carries a considerable distance. A scheme for a further extension of the intercepting sewer has been prepared and proposals formulated for works to effect a permanent cure.
ANTI-MALARIAL WORKS.
100. Channels and trained nullahs were maintained in a satisfactory condition; minor repairs in the Peak, Mt. Parker Valley, Deep Water Bay and Kowloon Tsai areas being carried out as necessary. The few complaints of mosquito breeding were dealt with without great trouble or expense.
101. Further nullah training was carried out near South Bay Road, Repulse Bay.
102. Gaugings were taken during the dry season in nullahs from which flushing supplies are taken in order that full use might be made of the flow available. The increase in the number of water closets coupled with water restrictions makes it difficult to ensure proper supplies during the dry season though it has not been found necessary to discourage the adoption of the water carriage system.
WORKS ON PRIVATE ACCOUNT.
103. Works under this head increased largely due to the construction by this office, with a view to adoption for future maintenance, of storm-water and foul sewers for private building estates; notably Jardine's Lookout, Kowloon Tsai, K.I.L. 1203 Soy Street and N.K.I.L. 3594, Boundary Street.
104. Over 5,000 feet of stormwater and foul sewers were laid, more than 600 sewer connexions were provided and a footbridge was erected over the Boundary Street nullah for the Military Authorities.
15