full supply. During the period of extreme restriction, consumption averaged 60.5 million gallons per day.
8.10. Considerable damage was caused to installations during the heavy rainfalls of August and September, particularly on Lantau Island. The total expenditure on repairs amounted to $1 million. On 27th February a serious burst occurred in the Tai Lam Chung supply tunnel, above Sham Tseng village, disrupting the normal draw off of 50 m.g.d. from Tai Lam Chung reservoir and damaging a few squatter huts. A half mile long 30-in. dia. diversion main was completed within 11 days, bypassing the damaged section of tunnel and permitting the extraction of 25 m.g.d. from Tai Lam Chung reservoir. Repairs to the damaged tunnel portal were virtually complete by the end of the year and normal draw off resumed.
8.11. Normal overhaul and repainting of control gates, maintenance of catchwaters and treatment works and routine inspection and cleaning of service reservoirs, access roads and station surrounds continued. New fresh water service reservoirs at Conduit Road, Ham Tin, Kwai Chung North, Tai Po and salt water service reservoirs at Kennedy Town and Ha Lo Wai were commissioned.
Distribution Section
8.12. Work continued on extensions to serve new development, renewal of undersized or defective mains and alterations made necessary by road construction. Apart from mains laid on specific projects, approximately 34 miles of mains were laid in extensions to the fresh and salt water distribution systems.
Waste Detection Section
8.13. This Section was temporarily disbanded on 25th June due to the introduction of extreme water restrictions. The staff were seconded to the House Service or Supply sections to carry out Water Emergency duties. Systematic waste detection was reintroduced on 19th October; 206 areas were checked and a number of major leaks were discovered and repaired, resulting in a daily saving of over two and a quarter million gallons of water.
House Service Section
8.14. Two major changes in policy were made during the year. First, to permit, under certain conditions, the metering of individual properties
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full supply. During the period of extreme restriction, consumption averaged 60.5 million gallons per day.
8.10. Considerable damage was caused to installations during the heavy rainfalls of August and September, particularly on Lantau Island. The total expenditure on repairs amounted to $1 million. On 27th February a serious burst occurred in the Tai Lam Chung supply tunnel, above Sham Tseng village, disrupting the normal draw off of 50 m.g.d. from Tai Lam Chung reservoir and damaging a few squatter huts. A half mile long 30-in. dia. diversion main was completed within 11 days, bypassing the damaged section of tunnel and permitting the extraction of 25 m.g.d. from Tai Lam Chung reservoir. Repairs to the damaged tunnel portal were virtually complete by the end of the year and normal draw off resumed.
8.11. Normal overhaul and repainting of control gates, maintenance of catchwaters and treatment works and routine inspection and cleaning of service reservoirs, access roads and station surrounds continued. New fresh water service reservoirs at Conduit Road, Ham Tin, Kwai Chung North, Tai Po and salt water service reservoirs at Kennedy Town and Ha Lo Wai were commissioned.
Distribution Section
8.12. Work continued on extensions to serve new development, renewal of undersized or defective mains and alterations made necessary by road construction. Apart from mains laid on specific projects, approximately 34 miles of mains were laid in extensions to the fresh and salt water distribution systems.
Waste Detection Section
8.13. This Section was temporarily disbanded on 25th June due to the introduction of extreme water restrictions. The staff were seconded to the House Service or Supply sections to carry out Water Emergency duties. Systematic waste detection was reintroduced on 19th October; 206 areas were checked and a number of major leaks were discovered and repaired, resulting in a daily saving of over two and a quarter million gallons of water.
House Service Section
8.14. Two major changes in policy were made during the year. First, to permit, under certain conditions, the metering of individual properties
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18
18
Page
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