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198. Periods when water was lost by overflow were:-
Reservoir Overflow Periods
ISLAND
Tytam Tuk 84 days between 19th July and 10th October, 1948.
Aberdeen Lower 118 days between 15th June and 10th October, 1948.
Pokfulam 29 days between 12th June and 14th June, 1948. 24th July and 1st August, 1948. 30th August and 1st Sept., 1948. 3rd Sept. and 6th Sept., 1948. 23rd Sept. and 2nd Oct., 1948.
MAINLAND
Kowloon Byewash 76 days between 28th July and 20th October, 1948.
Jubilee 52 days between 24th July and 20th October, 1948.
199. The leakage through the 30" washout valve at Jubilee Dam referred to in para. 193 of last year's report, was still not dealt with owing to the non-arrival of the replacement valve. The leakage did not increase during the year.
200. Damage through unknown causes to one of the 21" cross harbour water mains occurred. The concrete casing was broken, the steel pipe was dented and a number of the muntz metal covers on the expansion joints were found to have disintegrated. Arrangements to effect repairs were in hand.
201. Due to the large number of leaking joints on both 24″ Shing Mun trunk mains in Castle Peak Road between Taipo Road and Wong Uk all joints were electro-welded in conjunction with the resurfacing of the road by the Roads Office. This work was carried out by Messrs. J. P. Inglis & Sons at a cost of $14,400. No leaks have occurred since the work was completed in July 1948.
202. Pumping Raw Water:--During the year 1,965 million gallons of raw water were pumped out of a total consumption of about 11,160 million gallons. At Tytam Tuk Pumping Station serious deterioration had taken place in the boilers which were consequently operated at reduced steam pressure and reduced pumping capacity. Minimum repairs were carried out in view of impending changes.
203. Filtration and Treatment:-Some 11,147 million gallons of water were filtered at eleven filtration plants. During the year samples of water were examined regularly by the Government Pathologist and by the Government Chemist. Details of results are given in Table IV.
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198. Periods when water was lost by overflow were:-
Reservoir
Tytam Tuk
Aberdeen Lower
Pokfulam
Kowloon Byewash
Jubilee
Overflow Periods
ISLAND
84 days between 19th July and 10th October, 1948.
118 days between 15th June and 10th October, 1948.
29 days between 12th June and 14th June, 1948. 24th July and 1st August, 1948. 30th August and 1st Sept., 1948. 3rd Sept. and 6th Sept., 1948. 23rd Sept. and 2nd Oct., 1948.
MAINLAND
76 days between 28th July and 20th October, 1948.
52 days between 24th July and 20th October, 1948.
199. The leakage through the 30" washout valve at Jubilee Dam referred to in para. 193 of last year's report, was still not dealt with owing to the non-arrival of the replacement valve. The leakage did not increase during the year.
200. Damage through unknown causes to one of the 21" cross harbour water mains occurred. The concrete casing was broken, the steel pipe was dented and a number of the muntz metal covers on the expansion joints were found to have disintegrated. Arrangements to effect repairs were in hand.
201. Due to the large number of leaking joints on both 24′′ Shing Mun trunk mains in Castle Peak Road between Taipo Road and Wong Uk all joints were electro-welded in conjunction with the resurfacing of the road by the Roads Office. This work was carried out by Messrs. J. P. Inglis & Sons at a cost of $14,400. No leaks have occurred since the work was completed in July 1948.
202. Pumping Raw Water:--During the year 1,965 million gallons of raw water were pumped out of a total consumption of about 11,160 million gallons. At Tytam Tuk Pumping Station serious deterioration had taken place in the boilers which were consequently operated at reduced steam pressure and reduced pumping capacity. Minimum repairs were carried out in view of impending changes.
203. Filtration and Treatment:-Some 11,147 million gallons of water were filtered at eleven filtration plants. During the year samples of water were examined regularly by the Government Pathologist and by the Government Chemist. Details of results are given in Table IV.
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