PUBLIC WORKS AND UTILITIES
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observations are used to assess dispersal patterns to ensure that the coast line is not contaminated. Observation of the submarine outfalls now in use has shown this method of disposal to be satisfactory. At three submarine outfalls, sewage is partly treated in screening plants prior to discharge. Four submarine outfalls with similar facilities, to serve sewerage districts at Lai Chi Kok, Sham Shui Po, Wan Chai East and Wan Chai West, are now being planned.
Sewerage systems are also being constructed in the new towns now being developed in the New Territories. Following considera- tion of a report prepared by consulting engineers on sewage treat- ment and disposal facilities for development centres in the northern New Territories, it has been decided to undertake hydrological surveys of Tolo Harbour and of Victoria Harbour with its associated tidal streams past Tsuen Wan and Castle Peak, to determine their capacity to accept sewage without causing con- tamination of the coast. Arrangements were made to commence the design of a pilot sewage treatment works at Shek Wu Hui. In addition to improving the sanitary conditions in the area, this project will provide information on the use of various forms of treatment suitable to conditions prevalent in Hong Kong which will form the basis for the planning of treatment works in the future.
On Hong Kong Island work was in progress on the extension of stormwater culverts in conjunction with the Wan Chai reclamation project. The last section of the Albany nullah between Helena May Institute and Kennedy Road was culverted to facilitate construction of the new road, Cotton Tree Drive, as part of the Garden Road complex. Improvements to existing sewerage systems were continued at Tai Hang, Wan Chai, Central district, Western district on Hong Kong Island and Tai Kok Tsui, Sham Shui Po and Lai Chi Kok on Kowloon whilst improvements for other areas were being planned. Extensions to main stormwater culverts across Cheung Sha Wan reclamation were completed.
PORT WORKS
On Hong Kong Island the construction of the main seawall for the Wan Chai reclamation scheme continued and a cargo-handling basin was completed at the eastern end of it to cater for the ever- increasing demand for cargo loading and unloading areas. The