TRANSPORTATION OF THE DEBRIS 203 



as to permit the construction of bins for the temporary deposit 

 of the dredged materials when removed from the scows. These 

 bins are so constructed that railroad cars running on standard- 

 gauge tracks may pass underneath them; thus the debris from 

 the bins may be automatically dumped into the cars to be sent 

 to their final destination. Fig. 71 represents one of these for unload- 

 ing barges as used along the Mississippi River in connection with 

 the sand and gravel industry. It was taken from Engineering 

 Record, January 5, 1907. 



