20
-15-
per diem on the completion of the catchwaters which would drain
the southern slopes of Tai-mo-shan. The estimated maintain-
able yield of the low level reservoirs is a little over 3 million
gallons per diem.
Filters.
77. The high level supply is passed through rapid gravity
filters capable of filtering 15 million gallons per diem, the
filtered water being discharged into the Shek-lai-pui service
reservoir holding 11.4 million gallons, the top water level of
which is 443.
78. The low level supply passes through slow sand filters
designed for a normal rate of filtration of 2.9 million gallons
per diem, a rate which has been considerably exceeded.
79. In his Report already referred to, Mr. Woodward
recommended that filters should be capable of dealing with
30% more than the average daily demand, and we agree with this
view.
80.
Distribution and Service Reservoirs.
Two 24-inch trunk mains convey the high level water
into Kowloon, feeding the Yau-ma-ti Service Reservoir which
holds 5† million gallons, the top water level being 215, and
another service reservoir now under construction north of
Kowloon-chai, which will contain 6 million gallons and will be
fed through a 21-inch branch, the top water level being 300.
81. Another site for a service reservoir has been
selected near Kowloon City, which would be fed by means of an
18-inch branch from the 21-inch main.
82. The Harbour pipe lines convey high level water
to the Garden Service Reservoir on the Island, the top water
level of which is approximately 240.
83. An 18-inch trunk main carries the low level water
feeding the Kowloon Tong Service Reservoir, which holds about
15
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