162. In analyzing these figures it is evident that though by far the largest amount of development is taking place in Kowloon and New Kowloon, nevertheless the length of new drainage laid in the New Territories alone falls not far below that laid on the Island, thus showing that with land on the Island becoming scarce the tendency is for development to spread to the Mainland. The majority of work on the Island has been concentrated on the replacement of the existing old and defective drainage and in particular, the replacement of the sewers in Stubbs Road, Barker Road and along Pokfulam Road from Queen Mary Hospital to the Sandy Bay Outfall.
Resettlement and Housing Development
163. Extensions of the existing drainage serving the Housing Society's Healthy Village scheme on the Island and the resettlement areas of Li Cheng Uk and Shek Kip Mei in Kowloon, together with the new drainage systems required for the resettlement areas of Lo Fu Ngam, Tai Wan Hill and the Housing Authority scheme at Ma Tau Wei Road, have been considerable. In addition a large amount of forward planning was carried out on drainage work at proposed schemes for the Housing Authority and Resettlement Department.
Nullah Decking
164. A considerable programme of nullah decking was carried out during the year in order to remove traffic obstructions in the main roads and sanitary nuisances. To these ends the Tai On Street nullah on the Island and Soy Street, Nelson Street and Cooke Street nullahs, together with 800 feet at the outfall end of Tonkin Street nullah, in Kowloon were decked.
Disposal Works and Intercepting Sewers
165. The urban areas of the Colony have been divided into sewage disposal areas with the intention of draining the sewage by gravity, and in some cases by pumping, to nine focal points where screening or similar treatment will be given before the effluent is discharged to the waters of the Colony by deep sea outfalls. Of these nine areas, the scheme covering the Yaumati area was virtually complete with the exception of the screens. Sewage from this area is concentrated at Anchor Street, necessitating two pumping stations. At Anchor Street the
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