The Army Corps of Engineers made a bad call in not pushing more water downriver sooner this spring. They have too many competing idiots campaigning the ACE for their economic interests.
The ACE should have flood prevention as their #1 concern, and whether or not some barge can float up the Missouri river in August is utterly secondary. We now have trucks and trains to carry bulk freight if the river gets too low.
As soon as it stops snowing up river, the rains will come causing a biblical snow melt adding to the runoff.