Q 71
filled and increased leakage over previous figures was observed. In order to check this a row of interlocking steel sheet piles was driven to hard ground but as these measures did not reduce the leakage the following operations were carried out. Eight holes were bored of a total footage of 359 feet of which thirty-nine were in hard and 320 were in soft. Fluorescein dye was experimented with in all holes but no trace of dye was found in other bore holes or externally. Three of these holes were grouted at a pressure of twenty pounds per square inch with a mix of a water/cement ratio of 0.66 and took seven, sixteen and seventeen cubic feet of grout respectively. The remaining holes were plugged but not grouted. Ten and a half tons of cinder dust were deposited in the reservoir on the water face of the adjacent embankment. None of these measures were satisfactory in reducing the leakage which reached a maximum of 6,750 gallons per minute in September. Accordingly instructions were received from the Consulting Engineers in December to proceed with the construction of a concrete cut-off wall across the gap. Plans and specifications were prepared and tenders had been called for at the end of the year.
76. The remedial measures carried out at Yaumati service reservoir last year have proved effective, no further leakage having occurred.
77. At the end of the year there were in use:- 95.2 miles of mains (Details in Appendix XI), 120 public standpipes, 170 pedestal hydrants, 360 single underground street fire hydrants and 112 private fire services.
78. The following repairs were carried out to the general distribution system:- 2,354 to outside services, 208 to mains and 113 to valves.
79. The flush system was installed at the Water Works Bungalow, Taipo Road, a 7″ diameter sewer being laid and a reinforced concrete septic tank constructed in the valley below the Shek Li Pui Access Road.
(C) NEW TERRITORIES.
Village Supplies.
TAIPO.
80. The total quantity of water supplied during the year was 41.69 million gallons as compared with 43.22 million gallons last year, equivalent to an average consumption of 114,000 gallons per day. There were sixteen public standpipes and twenty-three fire hydrants in use at the close of the year.
FANLING.
81. The total quantity of water supplied during the year was 13.03 million gallons compared with 14.68 million gallons last year, equivalent to an average consumption of 36,000 gallons per day. There were two fire hydrants in use at the close of the year.
UN LONG,
82. The total quantity of water supplied during the year was 28.11 million gallons as compared with 20.34 million gallons last year, equivalent to an average consumption of 77,000 gallons per day. There were six public standpipes and twelve fire hydrants in use at the close of the year.
Q 71
filled and increased leakage over previous figures was observed. In order to check this a row of interlocking steel sheet piles was driven to hard ground but as these measures did not reduce the leakage the following operations were carried out. Eight holes were bored of a total footage of 359 feet of which thirty-nine were in hard and 320 were in soft. Fluorescein dye was experimented with in all holes but no trace of dye was found in other bore holes or externally. Three of these holes were grouted at a pressure of twenty pounds per square inch with a mix of a water/cement ratio of .66 and took seven, sixteen and seventeen cubic feet of grout respectively. The remaining holes were plugged but not grouted. Ten and a half tons of cinder dust were deposited in the reservoir on the water face of the adjacent embankment. None of these measures were satisfactory in reducing the leakage which reached a maximum of 6,750 gallons per minute in September. Accordingly instructions were received from the Consulting Engineers in December to proceed with the construction of a concrete cut off wall across the gap. Plans and specifications were prepared and tenders had been called for at the end of the year.
76. The remedial measures carried out at Yaumati service reservoir last year have proved effective, no further leakage having occurred.
77. At the end of the year there were in use:-95.2 miles of mains (Details in Appendix XI), 120 public standpipes, 170 pedestal hydrants, 360 single under- ground street fire hydrants and 112 private fire services.
78. The following repairs were carried out to the general distribution system:- 2,354 to outside services, 208 to mains and 113 to valves.
79. The flush system was installed at the Water Works Bungalow, Taipo Road, a 7′′ diameter sewer being laid and a reinforced concrete septic tank constructed in the valley below the Shek Li Pui Access Road.
(C) NEW TERRITORIES.
Village Supplies.
TAIPO.
80. The total quantity of water supplied during the year was 41.69 million gallons as compared with 43.22 million gallons last year, equivalent to an average consumption of 114,000 gallons per day. There were sixteen public stand pipes and twenty-three fire hydrants in use at the close of the year.
FANLING.
81. The total quantity of water supplied during the year was 13.03 million gallons compared with 14.68 million gallons last year, equivalent to an average consumption of 36,000 gallons per day. There were two fire hydrants in use at the close of the year.
UN LONG,
82. The total quantity of water supplied during the year was 28.11 million gallons as compared with 20.34 million gallons last year, equivalent to an average consumption of 77,000 gallons per day. There were six public standpipes and twelve fire hydrants in use at the close of the year.
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