 By tonnage of transported material , Missouri is by far the largest user of the river accounting for 83 percent of river traffic , while Kansas has 12 percent , Nebraska three percent and Iowa two percent . Almost all of the barge traffic on the Missouri River ships sand and gravel dredged from the lower 500 miles ( 800 km ) of the river ; the remaining portion of the shipping channel now sees little to no use by commercial vessels . 
 By tonnage of transported material , Missouri <a href='drop_aux' title='1'><mark>is</mark></a>by far the largest user of the river accounting for 83 percent of river traffic , while Kansas <a href='got' title='2'><mark>has</mark></a> 12 percent , Nebraska three percent and Iowa two percent . Almost all of the barge traffic on the Missouri River ships sand and gravel dredged from the lower 500 miles ( 800 km ) of the river ; the remaining portion of the shipping channel now <a href='uninflect' title='3'><mark>sees</mark></a> little to no use by commercial vessels . 
By tonnage of transported material , Missouri by far da largest user of the river accounting for 83 percent of river traffic , while Kansas got 12 percent , Nebraska three percent and Iowa two percent . Almost alll of tdabarge traffic on thdaissouri River ships sand and gravel dredged from the lower 500 miles ( 800 km ) of thedaver ; the daaining portion of the shipping channel now see little to no use by commercial vessels .