81. Contour Surveys and Levelling:- Contour surveys covered 2,717 acres with a chainage of 222,297 feet. The principal levelling undertaken was in King's Road, Yik Kwan Avenue, 4 acres in Blue Pool Road district, Kimberley Road and Chatham Road district, Kowloon Reservoir, Shatin, Fanling and Kam Tsin. The yearly computation of mean sea level was also undertaken.
DRAINAGE OFFICE.
Public Works Recurrent.
The
82. Maintenance of Sewers and Storm Water Drains:- The sewers and storm-water drainage systems of the Colony were maintained in a satisfactory condition throughout the year. Defective and missing fittings were replaced as necessary. Larceny of cast-iron surface fittings dropped very considerably. The septic tanks at Repulse and Deep Water Bays were desludged. The total number of choked Government sewers and storm-water drains cleared was 5,806, a monthly average of 484, as compared with a monthly average of 477 during 1947/48. Chokes and defects in private drainage systems were dealt with by property owners through the offices of the Urban Council and the Buildings Ordinance Office.
83. Maintenance of Anti-Malarial Works:- The previous year's work of clearing undergrowth, boulders and sand in the smaller nullahs was continued by departmental labour in various areas of the Colony, notably Mount Parker, Telegraph Bay, Island Road East of Shaukiwan and in the Kowloon Foothills. Repairs were carried out to the subsoil drainage of low-lying areas at Happy Valley and to the anti-malarial flushing tank at Mount Cameron.
84. Typhoon and Rainstorm Damage:- In Hong Kong, damage caused to nullahs at Mount Parker and Shaukiwan was repaired. Minor repairs were carried out to drainage channels in Pokfulam Village and to a storm-water drain in Pokfulam Road. On the Mainland, there was no serious damage but minor washouts occurred at Fukien Street and the Polo Ground at Boundary Street. These were made good and baffle walls built to check further erosion. A large proportion of the work consisted of clearing silt which had been washed into the nullahs from their respective catchments mainly owing to erosion due to tree-cutting during the occupation. All usable and clean sand deposits were removed by the Controller of Stores who sold the excavated materials for building purposes. The main nullahs cleared by this office were at Tong Shui Road, Sai Wan Ho and Shaukiwan on the Island and Boundary Street, Lo Lung Hang and Kai Tak on the Mainland.
85. Works Executed on Private Account:- The large amount of building work in progress in the Colony resulted in the work carried out under this head being greatly in excess of what had been anticipated. In addition to 376 sewer and storm-water connections being given, the following major works were under-
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81. Contour Surveys and Levelling:-Contour surveys covered 2,717 acres with a chainage of 222,297 feet. The principal levelling undertaken was in King's Road, Yik Kwan Avenue, 4 acres in Blue Pool Road district, Kimberley Road and Chatham Road district, Kowloon Reservoir, Shatin, Fanling and Kam Tsin. The yearly computation of mean sea level was also undertaken.
DRAINAGE OFFICE.
Public Works Recurrent.
The
82. Maintenance of Sewers and Storm Water Drains:-The sewers and storm-water drainage systems of the Colony were maintained in a satisfactory condition throughout the year. Defective and missing fittings were replaced as necessary. larceny of cast-iron surface fittings dropped very considerably. The septic tanks at Repulse and Deep Water Bays were desludged. The total number of choked Government sewers and storm-water drains cleared was 5806, a monthly average of 484, as compared with a monthly average of 477 during 1947/48. Chokes and defects in private drainage systems were dealt with by property owners through the offices of the Urban Council and the Buildings Ordinance Office.
83. Maintenance of Anti-Malarial Works:-The previous year's work of clearing undergrowth, boulders and sand in the smaller nullahs was continued by departmental labour in various areas of the Colony, notably Mount Parker, Telegraph Bay, Island Road East of Shaukiwan and in the Kowloon Foothills. Repairs were carried out to the subsoil drainage of low-lying areas at Happy Valley and to the anti-malarial flushing tank at Mount Cameron.
84. Typhoon and Rainstorm Damage:-In Hong Kong, damage caused to nullahs at Mount Parker and Shaukiwan was repaired.. Minor repairs were carried out to drainage channels in Pokfulam Village and to a storm-water drain in Pokfulam Road: On the Mainland, there was no serious damage but minor washouts occurred at Fukien Street and the Polo Ground at Boundary Street. These were made good and baffle walls built to check further erosion. A large proportion of the work consisted of clearing silt which had been washed into the nullahs from their respective catchments mainly owing to erosion due to tree-cutting during the occupation. All usable and clean sand deposits were removed by the Controller of Stores who sold the excavated materials for building purposes. The main nullahs cleared by this office were at Tong Shui Road, Sai Wan Ho and Shaukiwan on the Island and Boundary Street, Lo Lung Hang and Kai Tak on the Mainland.
85. Works Executed on Private Account:-The large amount of building work in progress in the Colony resulted in the work carried out under this head being greatly in excess of what had been anticipated. In addition to 376 sewer and storm-water connections being given, the following major works were under-
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