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City of Mission Hills, Kansas, and the Army Corps of Engineers

Working under a joint venture-held MATOC with the Kansas City District of the U.S. Army Corps of Engineers, WRS is providing engineering design for construction and bid documents to address active bank erosion and resulting instability along the left descending bank of Brush Creek between State Line Road and Ward Parkway. Shawnee Mission Parkway — a major thoroughfare carrying heavy traffic volumes daily — parallels Brush Creek at the top of bank along the project reach and is being threatened by the erosion.

The proposed design — developed by WRS at a concept lever under previous subcontract — includes using longitudinal peaked stone toe protection and rock vanes to protect the left bank against erosion. To ensure long-term stability, WRS developed a 2-D model to analyze the flow patterns and erosive forces along the reach and a 1-D hydraulic model for the required FEMA no-rise certification. In addition to the streambank stability improvements, the project team developed stream-management and training solutions to improve natural sediment transport through the State Line Road bridge.