tion. forty-three per cent of the total mileage of The utility of this great river for the con- the United States. This railroad system has veyance of freight is greatly curtailed by the been developed along lines that are admir- fact that it is subject to heavy floods which ably adapted to meet… … Bear-trap dam; downstream view. TYPICAL EXCAVATOR AT WORK ON DRAINAGE CANAL. CONTROLLING WORKS OF DRAINAGE CANAL. JUNCTION OF EABTH MP ROCS 0VTS ON THE CBWAG0 DRAINAGE CANAL,
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