Dredging alternative possible on Mississippi?

GUTTENBERG, Iowa – The Army Corps has proposed an experimental system to use currents in the Mississippi River itself to catch sediment before it piles up in the navigation channel. The idea is to reduce some of the need for dredging. The Corps asked for public comments by September19 for possible environmental effects.  Queries. The pilot study would be in Pool 10 behind the Corps’ Dam at Guttenberg, specifically at McMillan Island near Glen Haven on the Wisconsin side. The Corps wants to learn the feasibility of channel management through what’s called “passive bedload sediment collection.” Sediment would be intercepted as it passes over the system.