ENG-1977 — Page 204

PUBLIC WORKS AND UTILITIES

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of a sewage screening plant and 0.9 of a hectare for the construction of a road. On the waterfront at Western, one hectare was reclaimed for the construction of roads, a wholesale market and cargo handling uses. At Lei Yue Mun Bay, 1.3 hectares was reclaimed for possible future use for a mass transit railway depot. At Mount Butler, 1.4 hectares was formed for government staff quarters and, at Chai Wan, three hectares was formed for a swimming pool.

In the New Territories, reclamation continued in Tai Po Hoi for the first stage. of the Tai Po Industrial Estate and some 21 hectares was formed. Reclamation for the second stage also began. Some 1.1 hectares of land was formed for the Police Cadet School at Tai Po. At Sek Kong Village, 1.6 hectares was formed for married soldiers' quarters and, on Lantau, 0.8 of a hectare was formed for the Shek Pik maximum security prison. At Tuen Mun New Town, construction of Pillar Point Road from Pillar Point to Siu Lang Shui was completed. Consultants also were appointed to in- vestigate the feasibility of developing Junk Bay to provide additional land for both industry and housing.

Drainage and Anti-pollution Projects

Sewage from the urban areas is collected by a separate system of sewers and, in most cases, is discharged into the sea via submarine outfalls after preliminary treatment to remove offensive and visible solids. The construction of submarine outfalls at Kwai Chung, Chai Wan and Repulse Bay was in progress, and the laying of new sewers was started in Ap Lei Chau, Hung Hom, Kwai Chung and Yuen Long.

Experimental work to assess the suitability of various sewage treatment methods was completed at the Shek Wu Hui pilot sewage treatment plant. Additional experi- ments on a high-rate biological filter were being carried out. The construction of new sewage treatment works at Tai Po, Yuen Long, Aberdeen and Repulse Bay continued. Consulting engineers continued with the design of Stage I sewage treatment and dis- posal works for North-West Kowloon. At Sha Tin, the interim sewage treatment works to serve the new town was completed and commissioned and, at the end of the year, civil engineering works for the permanent sewage treatment works were about to start.

Monitoring of water quality in local waters continued to obtain long-term data for the design for new facilities for sewage treatment and disposal, and to establish pollu- tion levels and trends. A data report summarising all monitoring results to the end of 1976 was prepared. A technical report discussing the monitoring results summarised in the previous data report also was prepared.

River training works at Tung Chung and duplication of stormwater drains in Kwun Tong Road were started while extension of arterial drains in the Western reclamation continued. Other works completed during the year included extension of stormwater drains in Chai Wan and Tong Mi Road reclamation, repair works at Shing Mun River and drainage improvement works at Ma Hang, Stanley.

About 950,000 tonnes of solid wastes were treated at the five controlled tipping sites at Sai Tso Wan, Ngau Chi Wan, Gin Drinkers Bay, Ma Tso Lung and Shuen Wan. Planning of replacement tips at Junk Bay, Ma Tau Tong and Siu Lang Shui was in progress. Construction of the refuse incinerator at Kwai Chung continued, and the design of Hong Kong's first full-scale refuse composting plant at Chai Wan was com-