But should this dredging cease for a period of ten to twenty years, authorities states that the Whang-would no longer be safe for the Dig vessels one now sees skimming up, its narrow channel.
The Conservancy. has smaller working at. various sin the viver, One is capable of lifting 150 tons of mud an hour, and three large grab dredgers of the same capacity together with a small grab dredger carrying 60 tons an hour are other equipment for the work. The value of the grab dredgers, one of which is. working fat present off the Bund Gardens, is principally "in their ability to close to the shore, or elsewhere without causing obstruction, The bucket dredgers, on the contrary, must have @ wide berth for operations.
"This dredging work is the central motive of the Board. Underlying all its plans is the encompassing aim, "to get a smooth continuous channel of uniform depth." 'Three million tons of mud a year are dredged from the Whangpoo, about half of which stupendous quar tity is taken from just off shore. 'The idea' can be clearly seen. If the course of the river is keep straight along. the shore, the tide itself will help in carrying the residue of mud along, and so do it own deepening. The principle has ome mx YANGTZErOO MUILT BY
Text read from the printed page and cleaned; old type leaves the occasional error.