this height before the rains set-in.
The following Questions suggest themselves with reference to the proposed works as those upon which it would be of importance to obtain a professional opinion.
1. The best means of making the bed of the Reservoir watertight should it be found necessary to adopt artificial measures, whether by the use of Concrete, Cement or Puddle? 2. In the event of solid rock being met with in part of the Puddle Trench, the depth to which it would be advisable to cut out the rock to form a Bed for the Puddle or Concrete backing? 3. The best means of making good ground under the permanent Bye wash, it being necessary to excavate to a depth of 15 feet above the bed of the reservoir to lay the waste Culvert and form the temporary Waste Weir?
To
Milton
Surveyor General
22nd August-1866.
Page 401
Approximate Estimate for forming Reservoir at Pokfulam calculated to Impound 100,000,000 Gallons.
Excavation to average depth of 20 feet below natural surface230,000 cubic yards@ 10¢23,000 Excavation for Puddle Trench34,000 cubic Yards@ 60¢ Excavations for Concrete Trench at toe of Bank533 cubic yards@ 20¢ Do for Culvert431- H Syphon well 1644 cubic yards@ 1001644 6500 166. bo Wo 2207. 328 33981 80 66. bo 0. for foundation of Valve well335 cubic yards@ 20¢ 2370 cubic yards@ 20¢474 for Bye Culvert Concrete against the Puddle30,400 cubic feet@ 7¢2655 Do in Toe Trench Do under Bank22,500 cubic feet@ 7¢1575 " for Culvert & wells on slope115,200 cubic feet@ so¢13,440 30,000 cubic feet@ 7¢2100 To under paving of Bye Channel9,000 cubic feet@ 7¢630 Do behind walls of Bye Channel4,800 cubic feet@ 7¢ Puddle in Trench and Bank175,200 cubic feet@ ...... Gry Chunam to sides of Puddle Picked material in Paving on Slope81,000 cubic feet@ 24¢3264 Bank39,000 cubic yards@ 10¢3,900 8,000 sup. feet@ 350044,000 Do Bye Channel Outlet-Culvert 5'x3'ovo sup feet@ sop4,500 280 feet run@ 24102,800 Culvert under Bye Wash 6'x4'400 feet run@ $156,000Horward. §.
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