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The trap is in average about 2km long and 2m deeper than the actual water depth and spans the whole of the 300m width of the navigation channel (Fig. 1). The geometry of the trap is aligned to zones of maximum sedimentation in the past. Therefore, it has a triangular geometry on the western side. By the end of 2010 a total amount of about 4 mill. m³ of fine sediments was removed from the trap and relocated in four maintenance campaigns to an area about 50 km downstream at Elbe-km 689.