Lenexa, Kansas
Client:City of Lenexa
This project, designed by George Butler Associates and Terra Technologies for the Johnson County Stormwater Management Advisory Council (SMAC) involved both stream bank stabilization and channel improvements for the purposes of reducing flooding and damage. The project, which involved approximately 1,000 linear feet of channel, required a public participation program and preliminary engineering study during which three alternatives involving various methods of biotechnical engineering were recommended.
Because the stream flowed through a subdivision, upstream urbanization increased both flow volume and velocity through this particular reach of the stream. Bank sloughing, undermining of trees and other structures and general loss of bank material had become a problem. In addition, several of the homes along the reach were within the 100-year floodplain. An additional challenge was the desire for an environmentally sound solution that minimized the visual impact of the project on the area. Using various biotechnical engineering solutions, a plan was designed that will withstand the current velocities and flood volumes experienced through the reach while adding to the aesthetic value of the area. The design also incorporates a small flood wall to remove the affected homes from the flood plain area. Construction was completed in the spring of 2002.
This project was recognized by the Kansas City Chapter of the American Public Works Association as the 2002 Mid-Size Environmental Project of the Year.
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