excavation being higher than anticipated and by restrictions on the supply of explosives.
8.40. A scheme was prepared for uprating the Yuen Long treatment works from two million to four million gallons per day and tenders were invited for the supply of the treatment plant.
8.41. A cross-country link main between Yuen Long treatment works and the Castle Peak treatment works site was being laid. This will deliver treated water to the new development at Castle Peak until the Castle Peak treatment works has been commissioned.
8.42. Laying of five miles of trunk main to supply treated water to Sha Tin and the new Chinese University at Ma Liu Shui was completed, requiring only final testing to be carried out.
8.43. A temporary pumping station was in course of erection at the Sha Tin treatment works to supplement existing pumping capacity prior to the uprating of the permanent pumping station.
8.44. Work was in hand on erosion control works comprising grading, turfing and channelling in the Lower Shing Mun catchment area.
8.45. Construction and maintenance of irrigation works in the New Territories continued. These included works carried out under the programme of minor irrigation works on behalf of D.A.F. and under the Plover Cove Scheme. One item was a 200 foot deep well which was sunk at Fung Yuen to receive an 8 inch submersible pump.
8.46. A contract was let for laying a cast iron sewer at Tai Mui Tuk to link up the existing drainage systems of the Plover Cove quarters and other buildings and to discharge outside the reservoir catchment area.
8.47. Preparations, including indenting for pipes, were in hand for the Sai Kung town water supply scheme, the construction of which is expected to commence later in the year.
8.48. With the improvement in the Colony's water supply system, the temporary Castle Peak flood pumping scheme, installed to pump river water to the Tai Lam Chung catchwater during the 1967 drought, was dismantled and the 21" diameter steel main removed for use elsewhere.
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