Raising of Plover Cove Dams. Uprating and Extension of Sha Tin Treatment Works and Pumping Station and Tai Po Tau Pumping Station
10.78. At Plover Cove, investigation of the earth fill in the existing dams, the foundations of the spillway and the sites of the proposed borrow areas and saddle dam was completed. Tenders were called for the raising of the dams and spillway to increase the capacity of the reservoir from 37,378 to 51,778 million gallons.
10.79. At Sha Tin, work proceeded on the erection of the plant for increasing the capacity of the existing rapid gravity filters from 80 to 95 million gallons per day and a contract was being negotiated for the polyelectrolyte and carbon dosing plant. Proposals were made for a second stage increase of the filtration capacity to 130 million gallons per day by substituting anthracite for part of the sand filter media. The manufacture of the additional pumpsets associated with the increased filtration capacity continued, and contracts were let for the necessary control, instrumentation and electrical plant.
10.80. Adjacent to the existing Sha Tin treatment works, formation work was begun for a new treatment works to provide further filtration capacity of 65 m.g.d., and contracts for the plant for the filters and settlement tanks were awarded. Negotiations were in hand for the chemical plant contract. Design of the civil works, the pumping station extension and the associated pumping plant continued.
10.81. Tai Po Tau pumping station pumps to Sha Tin treatment works water from China, the River Indus and Plover Cove. Installation of additional pumps and associated works to increase the pumping output to 120 m.g.d. were all well advanced. Design work continued on an extension of the pumping station for additional pumping plant to an increased total output of 160 m.g.d. A contract was let for the additional intake and aqueduct works associated with the increased pumping capacity.
High Island Water Scheme
10.82. This scheme similar in concept to Plover Cove will include the building of large dams between High Island and the eastern part of the Sai Kung peninsula. The dams will extend to a height of approximately 200 feet above sea level and to a depth of 80 feet below sea level. Surface water will be collected from stream intakes,
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