|Bendway Weir History, Theory, and Design|
The Bendway Weir concept was first conceived in January 1988 by Mr. Thomas J. Pokrefke Jr. at the U.S. Army Engineer Waterways Experiment Station for use in a physical movable-bed model of a 32 km (20 mile) reach of the middle Mississippi River (Derrick, et. al 1994). The model was built in response to a number of severe bendway environmental and navigation problems, including: excessive maintenance dredging costs, constricted navigation channel, high velocities, detrimental high-flow current patterns, inadequate navigation channel widths in the crossing downstream of the bend, and the need to preserve Least Tern (Federally protected seabird) nesting areas. A modified version of Mr. Pokrefke's first plan was used to construct the first two sets of weirs in two bends of the Mississippi River.
|Bendway Weir Model Observation.|
|Bendway Model With Weirs (Flow is parallel to the outer bank).|
Coastal and Hydraulics Laboratory - Engineer Research and Development Center
Waterways Experiment Station - Vicksburg, Mississippi