Having taken over the responsibility of maintenance of Services maritime structures, a start was made on major repairs to the Naval Dockyard quay wall.
5.47. The new 800-cu. yd. self-propelled grab hopper dredger removed 150,000 cu. yds. of spoil, mostly from the Western Dangerous Goods Anchorage and the Kwun Tong Nullah outfall. Since this new dredger has been in commission, the two older dredgers have been operated alternately using only one crew. The total quantity of spoil removal over the year from nullahs, sewer outfalls and pier approaches amounted to 67,000 cu. yds. These two old dredgers also assisted the Marine Department by dredging around harbour moorings to enable these to be lifted for maintenance purposes.
5.48. The Division's divers carried out underwater inspections of seawalls, piers, pumphouses and pipelines, including underwater blasting of a rock outcrop in Silvermine Bay. A total of 480 hours was spent underwater.
Boring and Surveys
5.49. 243 marine boreholes totalling 6,134 ft. were sunk at various sites in the Colony waters.
5.50. Hydrographic and shoreline surveys were carried out at Castle Peak Bay in connection with the proposed New Town Development. Echo sounding surveys were made for proposed watermains crossing Lamma Channel and Rambler Channel, the existing cross-harbour gas main reserve and the Hung Hom sewer outfall. Surveys were carried out for checking the progress made on reclamation, for measuring underwater work and for investigating sites of proposed works. Topographical surveys of four sites were also undertaken.
ROADS AND DRAINAGE DIVISIONS
Chief Engineers:
Hong Kong Island: H. D. STEAD, M.Sc., D.I.C., A.M.I.C.E. (to 12.7.67.)
A. T. ARMSTRONG-WRIGHT, F.E.D.I., A.M.I.C.E. (from 13.7.67.)
Kowloon: G. A. G. SAPSTEAD, A.M.I.C.E.
New Territories: F. E. SHORT, A.M.I.C.E. (Acting)
C. W. H. DALLAS, A.M.I.C.E. (Acting)
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