(8) The construction of three 50-ton reinforced concrete mooring blocks for the Marine Department.
(9) The dumping of a protective rubble mound to the Aberdeen Harbour water main,
8.21. Marine and land boring units carried out the following investigations:
(1) Marine Boring
152 boreholes totalling 3,778 feet were sunk at Tai Lam Chung, Silver Mine Bay, Tsuen Wan, Deep Bay, Cheung Sha Wan, Yau Ma Tei, Jordan Road, Kowloon Camber, Ma Tau Kok, Kai Tak, Ngau Tau Kok, Kwun Tong, Aberdeen, Kennedy Town, West Point and North Point.
Vane tests were carried out in connexion with the design of foundations for pumphouse and seawall at Jordan Road reclamation fronting K.M.L. 111.
(2) Sand Survey
A survey of the Colony's sand resources by the Sand Monopoly contractor continued. During the year deposits totalling over ten million cubic yards were located at Sai Kung Hoi, Tung Chung, Chu Lu Kok and North-east Lantau.
(3) Land Boring
130 boreholes totalling 1,866 feet were sunk at Kowloon Tong, Tsim Sha Tsui, Gascoigne Road, North Point, Mount Nicholson, Beaconsfield Arcade, Castle Peak Road, San Hui, Tai Lam Chung, Silver Mine Bay and Luk Keng.
8.22. During the year a new rotary boring rig was received and installed on the self-propelled barge and the old rig transferred to a new barge, thus enabling more and deeper bores to be made to give more accurate information of seabed conditions.
Surveys
8.23. The following surveys were carried out:
(1) Progress surveys in connexion with Naval Dockyard reclamation, Hung Hom reclamation stage IV, Stanley seawall, Central reclamation stages II and IV, Silver Mine Bay seawall, Kwun Tong reclamation Industrial Zone V sections C & D, reclamation off Jordan Road fronting K.M.L. 111, and Shek Kwu Chau seawall,
(2) Surveys for the siting of cattle piers at Kennedy Town, Cheung Sha Wan and Tai Lam Chung and a public pier at Repulse Bay.
(3) Tidal level observations at Sha Tau Kok, Silver Mine Bay, Tung Chung, Lam Tong Island, Shek Kwu Chau and Sham Chung.
(4) Current measurements at Lai Chi Kok Bay, Sulphur Channel and North Point off Tin Chiu Street.
(5) Setting out works and progress surveys in connexion with the construction of piers and landings at Kai Tak, Shek Kwu Chau, Sham Chung, Lai Chi Chong, Tsim Bei Tsui and Nam Sang Wai.
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Boring
(8) The construction of three 50-ton reinforced concrete mooring blocks
for the Marine Department.
(9) The dumping of a protective rubble mound to the Aberdeen Harbour
wate main,
8.21. Marine and land boring units carried out the following investigations:
(1) Marine Boring
152 boreholes totalling 3,778 feet were sunk at Tai Lam Chung, Silver Mine Bay, Tsuen Wan, Deep Bay, Cheung Sha Wan, Yau Ma Tei, Jordan Road, Kowloon Camber, Ma Tau Kok, Kai Tak, Ngau Tau Kok, Kwun Tong, Aberdeen, Kennedy Town, West Point and North Point.
Vane tests were carried out in connexion with the design of founda- tions for pumphouse and seawall at Jordan Road reclamation fronting K.M.L. 111.
(2) Sand Survey
A survey of the Colony's sand resources by the Sand Monopoly contractor continued. During the year deposits totalling over ten million cubic yards were located at Sai Kung Hoi, Tung Chung, Chu Lu Kok and North-east Lantau.
(3) Land Boring
130 boreholes totalling 1,866 feet were sunk at Kowloon Tong, Tsim Sha Tsui, Gascoigne Road, North Point, Mount Nicholson, Beaconsfield Arcade, Castle Peak Road. San Hui, Tai Lam Chung, Silver Mine Bay and Luk Keng.
8.22. During the year a new rotary boring rig was received and installed on the self-propelled barge and the old rig transferred to a new barge, thus enabling more and deeper bores to be made to give more accurage information of seabed conditions.
Surveys
8.23. The following surveys were carried out:
(1) Progress surveys in connexion with Naval Dockyard reclamation, Hung Hom reclamation stage IV, Stanley seawall, Central reclamation stages II and IV, Silver Mine Bay seawall, Kwun Tong reclamation Industrial Zone V sections C & D, reclamation off Jordan Road fronting K.M.L. 111, and Shek Kwu Chau seawall,
(2) Surveys for the siting of cattle piers at Kennedy Town, Cheung Sha
Wan and Tai Lam Chung and a public pier at Repulse Bay. (3) Tidal level observations at Sha Tau Kok, Silver Mine Bay, Tung
Chung, Lam Tong Island, Shek Kwu Chau and Sham Chung.
(4) Current measurements at Lai Chi Kok Bay, Sulphur Channel and
North Point off Tin Chiu Street.
(5) Setting out works and progress surveys in connexion with the con- struction of piers and landings at Kai Tak, Shek Kwu Chau, Sham Chung, Lai Chi Chong, Tsim Bei Tsui and Nam Sang Wai.
43
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