the main dam commenced. At the same time the Port Works Office completed the construction of the reinforced concrete jetty required for off-loading stones.
259. Mr. G. B. Gifford Hull, C.B.E., who was appointed by the Consulting Engineers as their Chief Resident Engineer arrived in October, and he was followed later by 2 other engineers appointed in the United Kingdom.
260. The greater part of the excavation for the foundations of the dam was completed by the end of the year. Bore holes were drilled to test the water tightness of the underlying strata and tests carried out revealed very good rock. A quarry was opened up and a large amount of other preliminary work completed.
261. With regard to the remainder of the scheme the following major orders were placed:
(i) Filtration plant, 10 million gall/day.
(ii) Pumping units 10 million gall/day.
(iii) Approx. 55,000 ft. of 30" diameter steel pipes together with smaller quantities of cast iron and steel pipes of lesser diameter.
A total of approximately 26,000 ft. of 30" dia. steel pipes was delivered.
262. Extensive surveys were completed to determine the pipe line and tunnel alignments and also the sites for the filter house, pumping station and service reservoirs. Trial and bore holes to determine rock level at the various sites were completed. Anti-malaria work by the Medical Department and afforestation work in the catchment areas by the Forestry Department were continued.
Miscellaneous Work.
263. The boring gangs were fully occupied mainly on site investigation for the Tai Lam Chung Scheme but bores were also drilled in connexion with the proposed new runway at Kai Tak and at Ping Chau Island, Mirs Bay, where investigations are in hand with a view to improving the water supply.
57
the main dam commenced. At the same time the Port Works Office completed the construction of the reinforced concrete jetty required for off-loading stones.
259. Mr. G. B. Gifford Hull, C.B.E., who was appointed by the Consulting Engineers as their Chief Resident Engineer arrived in October, and he was followed later by 2 other engineers appointed in the United Kingdom.
260. The greater part of the excavation for the foundations of the dam was completed by the end of the year. Bore holes were drilled to test the water tightness of the underlying strata and tests carried out revealed very good rock. A quarry was opened up and a large amount of other preliminary work com- pleted.
261. With regard to the remainder of the scheme the follow- ing major orders were placed:
(i) Filtration plant, 10 million gall/day.
(ii) Pumping units 10 million gall/day.
(iii) Approx. 55,000 ft. of 30" diameter steel pipes to- gether with smaller quantities of cast iron and steel pipes of lesser diameter.
A total of approximately 26,000 ft. of 30" dia. steel pipes was delivered.
262. Extensive surveys were completed to determine the pipe line and tunnel alignments and also the sites for the filter house, pumping station and service reservoirs. Trial and bore holes to determine rock level at the various sites were com- pleted. Anti-malaria work by the Medical Department and afforestation work in the catchment areas by the Forestry De- partment were continued.
Miscellaneous Work.
263. The boring gangs were fully occupied mainly on site investigation for the Tai Lam Chung Scheme but bores were also drilled in connexion with the proposed new runway at Kai Tak and at Ping Chau Island, Mirs Bay, where investigations are in hand with a view to improving the water supply.
57
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