Q 74
(iv) RENEWALS AND IMPROVEMENTS FUND.
(a) Replacement of No. 1 and 2 Pumping Units at Tytam Tuk,
97. No. 1 and 2 pumping units at Tytam Tuk, each of which consisted of ram pumps driven by a Tangye steam engine and a Lancashire boiler, were built in 1904 and condemned by Board of Survey in 1938. Tenders were therefore invited for the disposal of this plant and the accepted tenders were: (1) for the boilers, $2,500.00, Messrs. Hong Kong and Whampoa Dock Co. and (2) for the engines and pumps, $11,600.00 Messrs. Sing Woo Co. The plant was dismantled departmentally and removed by the successful tenderers in May.
98. To replace the above, two 2-stage centrifugal Pulsometer pumps, each capable of raising 14 million gallons of water per 24 hours to the 400 level gauge basin at Tytam tunnel and driven by a 175 H.P. 350 Volt English electric motor, were ordered on Indent at a cost of £1,108-10-0. These units had not arrived in the Colony at the end of the year. Electric power was laid on to the pumping station by the Hong Kong Electric Co. and transformers installed by them to step down the voltage from 6,600 to 350 volts.
99. The station buildings were altered where necessary to accommodate the new plant, and plans prepared for the installation of the new pumping units and connecting piping.
(b) Aberdeen and Aplichau Supply.
100. The maximum daily consumption of water in Aberdeen and Aplichau having increased to about 200,000 gallons, and the existing slow sand filters being capable of filtering 100,000 gallons per day only at the normal rate of filtration, the provision of more filters became essential. The existing plant being old (it was built in 1896) and the site being unsuitable for extensions it was decided to build an entirely new plant on a different site, and abandon the old one.
101. The new scheme consists of:
(1) Four concrete slow sand filter beds with a cope level of 280.00 A.P.D. each capable of filtering 100,000 gallons per twenty-four hours near Aberdeen lower dam.
(2) An 8" pipe line about 240 feet long to supply the filters with raw water from the 18" Aberdeen to Elliot main.
(3) A covered concrete service reservoir with a capacity of about 400,000 gallons at a T.W.L. of 272.00 A.P.D. adjoining the filters.
(4) A 6" pipe line about 2,000 feet long to connect this service reservoir with the existing distribution system in Aberdeen.
(5) Quarters for the Chinese staff near the filters.
(6) A covered concrete balance tank with a capacity of about 160,000 gallons at a T.W.L. of 210.00 A.P.D. on Aplichau Island.
(7) A 4" pipe line about 1,000 feet long to connect this balance tank with the existing distribution system in Aplichau.
102. Contract No. 39 of 1939 amounting to $67,663.70 was let to Messrs. Hoo Cheong & Co. for the construction work in Items 1, 3, 5 and 6 above, and work was commenced on 28th August. Good progress was made and by the end of the year the work was about half completed.
103. The pipe laying in Items 2, 4 and 7 was carried out departmentally.
Q 74
(iv) RENEWALS AND IMPROVEMENTS FUND.
(a) Replacement of No. 1 and 2 Pumping Units at Tytam Tuk,
97. No. 1 and 2 pumping units at Tytam Tuk, each of which consisted of ram pumps driven by a Tangye steam engine and a Lancashire boiler, were built in 1904 and condemned by Board of Survey in 1938. Tenders were therefore invited for the disposal of this plant and the accepted tenders were: (1) for the boilers, $2,500.00, Messrs. Hong Kong and Whampoa Dock Co. and (2) for the engines and pumps, $11,600.00 Messrs. Sing Woo Co. The plant was dismantled departmentally and removed by the successful tenderers in May.
98. To replace the above, two 2-stage centrifugal Pulsometer pumps, each capable of raising 14 million gallons of water per 24 hours to the 400 level gauge basin at Tytam tunnel and driven by a 175 H.P. 350 Volt English electric motor, were ordered on Indent at a cost of £1,108-10-0. These units had not arrived in the Colony at the end of the year. Electric power was laid on to the pumping station by the Hong Kong Electric Co. and transformers installed by them to step down the voltage from 6,600 to 350 volts.
99. The station buildings were altered where necessary to accommodate the new plant, and plans prepared for the installation of the new pumping units and connecting piping.
(b) Aberdeen and Aplichau Supply.
100. The maximum daily consumption of water in Aberdeen and Aplichau having increased to about 200,000 gallons, and the existing slow sand filters being capable of filtering 100,000 gallons per day only at the normal rate of filtration, the provision of more filters became essential. The existing plant being old (it was built in 1896) and the site being unsuitable for extensions it was decided to build an entirely new plant on a different site, and abandon the old one.
101. The new scheme consists of:
ན
(1) Four concrete slow sand filter beds with a cope level of 280.00 A.P.D. each capable of filtering 100,000 gallons per twenty-four hours near Aberdeen lower dam.
(2) An 8" pipe line about 240 feet long to supply the filters with raw water from the 18" Aberdeen to Elliot main.
(3) A covered concrete service reservoir with a capacity of about 400,000 gallons at a T.W.L. of 272.00 A.P.D. adjoining the filters.
(4) A 6" pipe line about 2,000 feet long to connect this service reservoir with the existing distribution system in Aberdeen.
(5) Quarters for the Chinese staff near the filters.
(6) A covered concrete balance tank with a capacity of about 160,000 gallons at a T.W.L. of 210.00 A.P.D. on Aplichau Island.
(7) A 4" pipe line about 1,000 feet long to connect this balance tank with the existing distribution system in Aplichau.
102. Contract No. 39 of 1939 amounting to $67,663.70 was let to Messrs. Hoo Cheong & Co. for the construction work in Items 1, 3, 5 and 6 above, and work was commenced on 28th August. Good progress was made and by the end of the year the work was about half completed.
103. The pipe laying in Items 2, 4 and 7 was carried out departmentally.
No comments yet.
Private notes are available after approval.