38
4th Section.
5th Section.
Available Supplies.
Gravity Section
Low Level Section
Gin Drinkers' Bay
Reservoir
Estimated Cost
4th. Section. Access Road, Tai Wai Village to tunnel mouth, Low Level Dams Nos. 5 &6, catchwaters draining the Eastern slopes of Needle Hill and Grassy Hill, Pumping Station at Tai Wai Village and rising or pumping mains to tunnel mouth and third trunk main to Kowloon etc.
5th. Section (very doubtful). Reservoir in Gin Drinkers' Bay, pumping station and pumping mains to conduit between tunnels.
The 1st Section will produce an average of nearly three million gallons a day in the driest known years, whilst with the 2nd Section added the average available supply will rise to 7 million gallons a day.
The 3rd. Section will add another 1 million gallons a day, making 11 million gallons a day in all, which is the limit of the gravity section of the Scheme.
The 4th. Section or development of the low level areas will make a further 6 million gallons a day available, or a total for the whole scheme, both gravity and pumping, of approx. 17 million gallons per day in the driest known period.
The Gin Drinkers' Bay Reservoir is too problematical to be included in the Scheme, but, should such a Reservoir be possible, about 5 million gallons per day might be expected from it.
The foundations of the proposed dams have not yet been thor. oughly explored, so that it is impossible to give an accurate estimate of cost, but the following is a rough estimate based on current prices:-
1st. Section
£3,500,000 $4,750,000
Sir,
DOWNING STREET.
13 JUNE, 1924.
I have the honour to acknowledge the receipt of your
despatch No. 163 of the 16th April, on the subject of the Shing Mun
Valley Waterworks Scheme, and to confirm my telegrain of the 29th
of May, in which I informed you that I approved of the first part of
the scheme being proceeded with.
2. I am advised that it would not be wise to adopt the
complete scheme without first obtaining the best technical advice, and that in view of the magnitude of the scheme it is desirable that a
consulting engineer should be sent out from this country to report on it.
I should be glad to learn your views on this suggestion.
2nd. 3rd. 1th.
"
+
$2,000,000
+1
$6,500,000
$16,750,000
Procedure
Work
in hand
Lay-out Plan
As prices are steadily rising, it is most probable that the above figure will be exceeded.
It is proposed to proceed with the work in the different sections as the water is required, and the First Section is now in hand.
The 1st. Section of the Access Road from Tsun Wan to Pineapple Pass about two miles in length is now under construction, while tenders have been called for the North and South Tunnels and South Conduit. Further Contracts for Pipers' Hill Service Reservoir and the Raw Water Reception Reservoir will be let before the end of the
year.
The accompanying small scale General Lay-out Plan shows the General Outline of the Scheme, whilst the Consumption Graph attached indicates the abnormal rise in consumption during the last ten years.
R. M. Henderson.
A. M. Inst. C. E.
Engineer. 8. 4. 1924.
GOVERNOR,
SIR, R. E STUBBS, K. C. MG.
&c., &c., &c.
I have etc.
(Sd.) J. 11. Thomas.
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