Erosion Control Products 6" Concrete Rip Rap 3" Recycled Concrete Rock 1-1/2" Recycled Concrete Rock Modified #67 Recycled Concrete 6" recycled concrete rip rap provides erosion controls for embankments, trails, road shoulders, small reservoirs and swales. Site access, tracking Pads, swales and embankments. Stabilization rock for extreme ground water areas. Stabilization rock for extreme ground water areas. Recycled Concrete Coverage Table