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THE IMPROVEMENT OF RIVERS. 

 OHIO RIVER. 



Operating Force. At Lock No. i eight men arc employed, at wages from $35 to $75 per month. 



(*) Bear-trap: 52' long, 41.5' wide, 9.33' high. 

 Weir No. i: 212' long, 41.5' wide, 10' high. 

 Weir No. a: 215' long, 41.5' wide, 9' high. 





