Castle Peak
5.12. The construction of the causeway across Castle Peak Bay at San Hui and the associated 1,700-foot-long main drainage channel were substantially completed. Most of the piles for the reinforced concrete bridge spanning the channel were also driven.
MISCELLANEOUS
5.13. A manual of 'Technical Instruction' and a set of 'Regulations' for Surveying Assistants (Engineering) were completed in draft and circulated to other sub-departments for comments.
DRAINAGE OFFICE
Chief Engineer:
T. K. HUM, M.Eng.(McGill), A.M.I.C.E., M.E.I.C.(Canada)
GENERAL
6.01. To cope with the expanding needs of the Colony 59 miles of new stormwater drains and sewers were added to the drainage systems.
6.02. The year saw a start on an examination of the problem of overloading of the sewerage system in the heavily built up areas.
6.03. The following table shows the works carried out during the year:
Island Kowloon & New Kowloon New Territories Total New drains laid (length in feet) 61,623 181,167 69,047 311,837 Defective drains replaced (length in feet) 7,160 4,239 1,809 13,208 Connexions provided (Nos.) 1,048 2,833 234 4,115 Chokes cleared (Nos.) 7,296 6,378 181 13,855 Sand cleared from culverts and nullahs (cubic yards) ... 4,171 80,290 93,153 8,692SEWERAGE AND SEWAGE DISPOSAL
6.04. The Sewer Duplication Section was formed during the year with the task of investigating the existing sewerage systems and designing the improvements necessary to transport and treat the increased