from Tai Po Tau for storage in the Plover Cove Reservoir. Minor work only remained on the intakes and shafts which divert water from the streams in the catchment between Plover Cove and Tai Po Tau into the main tunnel. Work on the overflow spillway from Plover Cove Reservoir was nearing completion. An ecological report on the biological effects likely to accompany the transition in Plover Cove from marine to fresh water conditions was compiled as a result of investigations undertaken in this and the preceding year.
7.51. The construction of two dams at Lau Shui Heung and Hok Tau to provide storage for irrigation of a large cultivated area was commenced in October 1966. A tunnel will link the two reservoirs, surplus water being diverted by means of a drop shaft and tunnel into the Stage II tunnel system.
River Indus Flood Pumping Scheme
7.52. The remaining civil engineering works connected with this scheme were substantially completed. One of the three high lift pumps and three of the ten low lift pumps were installed and operational. A further five low lift pumps were in course of erection. The remaining two high lift and two low lift pumps which had been temporarily installed in the existing Muk Wu Pumping Station continued in operation there.
Shek Pik and Tung Chung Schemes
7.53. All work on the Tung Chung Scheme, devised to bring water from the north side of Lantau to Shek Pik Reservoir, was completed and the system brought into operation. The irrigation work associated with the scheme remains to be completed.
Water Supplies to Resite Areas
7.54. Work on providing a water supply to the Chai Wan, Mount Davis and Jordan Valley resite areas was almost completed. The requirements for the Sau Mau Ping resite area were reviewed in the light of the continued necessity for a supply to this area.
WATER QUALITY CONTROL SECTION
Senior Waterworks Chemist:
D. L. MAKER, A.R.I.C., P.A.I.W.E.
7.55. This Section is responsible for all matters concerning treatment and quality control of Water Authority supplies. A Central Laboratory
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