How to develop a low impact natural solution for a community?
The client (urban HOA) had a grass-lined storm water conveyance channel that was eroding away in the center and creeping up the banks. Several large willow trees had grown where the water came under a road and through a concrete box culvert, those trees inhibited water flow. But once water flowed around the trees, it accelerated quickly and eroded the soil in the channel.
Objective was to restore the original grade of the channel, prevent more channel erosion thereby slowing future downstream sedimentation into the onsite retention ponds, reducing the future need for expensive dredging projects. The client did not want the expense or aesthetics of a concrete-lined channel to solve their problem. The Flexamat armor is a permeable, flexible concrete grid mat that allows grasses to grow through the mat, creating a more eco-friendly, better functioning and more aesthetically-pleasing experience to the community and homeowners that back up to the channel.