Modification of Meander Pattern Using Wing Damsby Clifford W. Schleuter, US Army Corps of Engineers, St., Louis, MO, USA,
Abstract: A sharp river bend and a highway bridge together create potentially hazardous conditions for all down-bound barge tows on the Mississippi River at Lansing, Iowa. The tendency of the river upstream of this bend is a smooth, gentle meander pattern which is one-half wave length out of sync with the problem bend; i. e. , the thalweg is against the left bank when the river is forced into a sharp left turn. A plan was developed to remove one existing wing dam in this reach, and construct six new wing dams in two fields of three each. The result has been a shift of the meander pattern, an increased radius of curvature into the Lansing highway bridge and a reduction in dredging in this reach.
Subject Headings: Dams | Highway bridges | Infrastructure construction | Rivers and streams | Channel bends | High-rise buildings | Bending (structural) | Highway and road conditions | Mississippi River | Iowa
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