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PUBLIC WORKS AND UTILITIES
a vaccine institute at Pok Fu Lam, and a new clinical building at Queen Mary Hospital, where work on another new building to house a mortuary, virus laboratory and clinical pathology service was also progressing. Also under construction were a polyclinic at Tsuen Wan, a block of senior departmental quarters at Tsuen Wan, police stations at Ngau Tau Kok and Shing Wo Road, Stage I of Hoi Sham Park at To Kwa Wan, a market at Wong Tai Sin, a columbarium at Wo Hop Shek cemetery and a beach building at Clear Water Bay beach. Several playgrounds, amenity areas, latrines, hawker bazaars and flood-lighting schemes were also in hand.
At the end of the year, design, working drawings and contract documents were in preparation for more than 200 projects including Stage IV of the Kai Tak Terminal Building modifications, the second stage of the multi-storey car park in Yau Ma Tei, a training school for the Preventive Service, a second block of government offices in Garden Road, a mental hospital and staff quarters at Lai Chi Kok, 12 police stations, a prison at Pik Uk, and a maximum security training centre. Design work was also in hand on an outdoor stadium at Ho Man Tin and the Hung Hom development complex which includes the new railway terminal building, an indoor stadium for 15,000 spectators and a multi-storey car park for 900 cars.
DRAINAGE
All the urban areas and the newly developing townships have been provided with waterborne sewerage systems, although in a few areas there are still some old buildings which are not yet connected to the public sewers. The hydraulic and physical conditions of exist- ing sewers were under constant observation. Sewers found to be unable to cope with the flow or structurally unsound due to ageing were enlarged or replaced. In accordance with these arrangements some of the pre-war sewers in Sham Shui Po, Lai Chi Kok and Wan Chai districts were relaid or enlarged.
The hydrological survey to investigate the dispersal characteristics of the waters of Tolo Harbour, Victoria Harbour and the associated tidal water past Tsuen Wan to Castle Peak was completed and the report finalised by the consulting engineers who were working in association with the staff of the Public Works Department. The report recommended the degree of treatment to be given to sewage from each sewerage district prior to discharge into the sea. It also covered the siting and design of submarine outfalls to carry the discharge into the main tidal currents. This is to achieve adequate dilution and dispersion to avoid pollution of the Colony's marine