CO129-533-4 Hong Kong Water Supply Scheme 28-1-1931 - 20-1-1932 — Page 81

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45.

4.6.

47.

40.

be such as to put the structure into the class of high dams

of which relatively few have been constructed, and in which

the problens of design are of a much more onerous and

responsible nature than those involved in ordinary dass, of which those already constructed in the Colony are typical.

In addition to the main dam a subsidiary dam

would be required to close the gap at Pineapple Pass.

The direct catchment area to the reservoir would

be 2,900 acres, and we estimate the maintainable yield of

the reservoir to be 9-25 M.G.D., so that upon its completion an additional 6*25 M.G.D. will become available.

Should a period of dry weather set in before the

dam is completed there would be no difficulty in impounding sufficient water to make good the deficiencies in the

present sources of supply.

The total estimated requirements for Hong Kong and Kowloon in 1945 amount to 26°10 M.G.D., and on the completion of the Shing Mun Reservoir the resources will

be 25'10, so that no further extensions should be required

until about that date if the assumed annual increments of

demand are not exceeded.

45.

It is for the future extensions of this scheme

thắt we have considered it desirɛble to modify Mr. Henderson'

proposals. In doing so, we had before us the latest informa- tion with regard to Gin Drinkers Bay which was not then avail- able to him, and were impressed with the necessity for the