n Operation, and One of the 15-Ton Hammers. could be dredged out tract would be _ shifted down to the next level into the new channel, level, by the “dry process,” that is to say, by méans of The water would then be cavated to the 50-foot level. steam shovels and trains of cars running over ordi-… … In one of the be the disposal Material in Gamboa Lake. accompanying of the enor- diagrams is mous amount PROPOSED EXCAVATION OF THE PANAMA CANAL BY FLOATING DREDGES,
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