In Alberta Canada. Alberta Transportation identified two ditches. H614:02 north ditch and H894:04 east ditch that had experienced severe erosion. Both ditches service drainage needs for adjacent farmland that comprises hundreds of acres of land. The bed slopes on the two ditches averaged approximately 7%, which enabled the silty soils to easily erode even during modest storm events.
The ditches experienced erosion that created gullies in some areas that were as much as 2 meters deep. The site was inspected in detail in 2009 at which time it was determined that repairs to these ditches were badly needed. If left unattended, further erosion would occur that might increase risks to the environment and to public safety.
Alberta Transportation evaluated their options and chose Armormax as the best ESC Best Management Practice for mitigating further erosion damage to the ditches.
The ArmorMax system is comprised of a High Performance Turf Reinforcement Mat (HPTRM) and Percussion Driven Earth Anchors (PDEAs). The HPTRM is a 3-dimensional woven polypropylene geosynthetic and provides vegetation reinforcement to its root system. The PDAEs consist of a bullet-nosed anchor tip that is connected by stainless steel cable and anchor caps. They are driven up to 700mm into the soil by using a demolition style percussion hammer and drive steel.
ArmorMax® is Solution for Alberta, Canada Transportation case study