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PUBLIC WORKS AND UTILITIES
years ago and are no longer adequate to serve the large blocks of flats now being built. To bring these systems up to modern standards a programme of works was begun a few years ago' involving duplication and replacement of existing sewers and the construction of large intercepting sewers work on this continues.
The intention is that, eventually, all sewage after having had at least preliminary treatment, will, where possible, discharge through submarine outfalls into the main tidal currents around the Colony. Dispersal by tidal current is first checked to ensure that the coast line is not contaminated, and observation of the six submarine outfalls now in use has shown this method to be satisfactory. Sewage, prior to discharge, is partially treated in screening plants at three of these outfalls-and similar facilities are planned for the others.
Sewerage systems are also being constructed in the new towns now being developed in the New Territories. A report on sewage treatment and disposal facilities for development centres in the northern New Territories has been prepared by consulting engineers and was under consideration at the end of the year.
Work was in progress on the decking of a length of the open nullah in Wong Nei Chong Road, the culverting of part of the nullah in Aberdeen and on the extension of Bowrington Canal through the new reclamation. With the exception of the training of the mouth of Kam Tin River, the Yuen Long flood control scheme is finished. The main stormwater culverts, damaged during the June 1966 rainstorm, have all been repaired.
PORT WORKS
Progress on port works projects was well maintained. On Hong Kong Island offices on the new government pier in the central district were completed and the pier opened for use. At Wan Chai two ferry piers, one single and one double berth, were completed. They will take the place of the present piers which will be displaced by reclamation. Work on the main seawall continued and 14 pump- houses were incorporated in it to cater for future requirements of private developers. In addition the existing police headquarters pumphouse was reprovisioned and an intake chamber for a salt- water supply system constructed. The supply of filling material
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