(3) The first half of the 6-million gallon service reservoir at Ngau Tau Kok and the 24-inch outlet main was completed, and work proceeded satisfactorily on the second half of the reservoir;
(4) The second half of the 20-million gallon capacity Lai Chi Kok Service Reservoir neared completion;
(5) Work started on the 72-million gallon High Level Service Reservoir No. 2 at Kau Wa Keng to complete the original plan for high level storage;
(6) The laying of 7,600 feet of 30-inch diameter steel pipes completed the trunk main supplying the Ngau Tau Kok Service Reservoir, and the laying of 4,000 feet of a total length of 18,000 feet of a second 30-inch diameter outlet main from the Lai Chi Kok Service Reservoir brought a supply of Tai Lam Chung water into the Sham Shui Po area.
(7) Contracts let included one for about 34,000 feet of catchwater and river protection works, and one for 5,200 feet of catchwater tunnel. Works completed included five miles of catchwater, one mile of tunnel and two miles of access roads. Preliminary work started on a further three and a half miles of catchwater.
(8) The pre-chlorination plant at Tai Lam Chung was brought into use in June 1958.
Deep Well Investigation—New Territories
314. Nine additional deep well bores were completed in the New Territories at Chuk Yuen, Tai Po, Fan Ling, Sheung Shui, Sek Kong, Ping Shan and Mai Po. Depths between 80 and 200 feet were reached, and only six of these yielded water and then only in limited quantities.
315. The results of the investigations over the past two years have confirmed that no large underground sources of water exist in the New Territories which could be tapped to augment the Colony's water supply. The programme of experimental bore holes was therefore concluded.
Salt Water Flushing Scheme
316. Work commenced on six separate schemes to substitute salt water for fresh water for flushing purposes. The schemes are concentrated in areas of new development, Housing Authority sites and resettlement estates; particulars of the individual schemes are as follows:
(1) Cheung Sha Wan
Work on a pumping station began at Cheung Sha Wan to pump to two separate service reservoirs at Piper's Hill and Tai Wo Ping. From the service reservoirs the flushing water will be distributed
55
(3) The first half of the 6-million gallon service reservoir at Ngau Tau Kok and the 24-inch outlet main was completed, and work proceeded satisfactorily on the second half of the reservoir;
(4) The second half of the 20-million gallon capacity Lai Chi Kok
Service Reservoir neared completion;
(5) Work started on the
on the 72-million gallon High Level Service Reservoir No. 2 at Kau Wa Keng to complete the original plan for high level storage;
(6) The laying of 7,600 feet of 30-inch diameter steel pipes completed the trunk main supplying the Ngau Tau Kok Service Reservoir, and the laying of 4,000 feet of a total length of 18,000 feet of a second 30-inch diameter outlet main from the Lai Chi Kok Service Reservoir brought a supply of Tai Lam Chung water into the Sham Shui Po area.
(7)
Contracts let included one for about 34,000 feet of catchwater and river protection works, and one for 5,200 feet of catchwater tunnel. Works completed included five miles of catchwater, one mile of tunnel and two miles of access roads. Preliminary work started on a further three and a half miles of catchwater. (8) The pre-chlorination plant at Tai Lam Chung was brought into
use in June 1958.
Deep Well Investigation—New Territories
314. Nine additional deep well bores were completed in the New Territories at Chuk Yuen, Tai Po, Fan Ling, Sheung Shui, Sek Kong, Ping Shan and Mai Po. Depths between 80 and 200 feet were reached, and only six of these yielded water and then only in limited quantities.
315. The results of the investigations over the past two years has confirmed that no large underground sources of water exist in the New Territories which could be tapped to augment the Colony's water supply. The programme of experimental bore holes was therefore concluded. Salt Water Flushing Scheme
316. Work commenced on six separate schemes to substitute salt water for fresh water for flushing purposes. The schemes are con- centrated in areas of new development, Housing Authority sites and resettlement estates; particulars of the individual schemes are as follows:
(1) Cheung Sha Wan
Work on a pumping station began at Cheung Sha Wan to pump to two separate service reservoirs at Piper's Hill and Tai Wo Ping. From the service reservoirs the flushing water will be distributed
55
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