When severe storms and flooding revealed weaknesses at numerous stream crossings in Johnson County, GBA worked closely with JCW to address the sites requiring immediate repair and to develop a comprehensive watershed approach toward managing these critical stream crossings. Aesthetics and accessibility became an important element with several of the crossings due to their location in many residential areas and along streamway parks. Due to this, bioengineering and stream geomorphology were important aspects of the project allowing the use of natural materials to restore and stabilize stream banks. These included geotextiles, fascine bundles of willows, other native shrubs, deep-rooting trees, and turf reinforced mattress for erosion control.
Improvements also included relocation of sanitary sewers, reconstruction of sanitary encasements, an aerial crossing and various vegetative and stone/concrete bank stabilizations. Along with these services GBA also provided design and bidding services as well as environmental permitting assistance.
