C/A
81
-11.
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