In April of 1988, the Virginia Department of Transportation installed the Geoweb cellular confinement system over the affected area which included embankment slopes as steep as 1:1. The Geoweb system confines the selected infill material within an open threedimensional cellular system while having minimal effects on natural subsurface drainage.
Virginia dOT slope protection, Collinsville, Virginia
Prior to 1988, the sandy clay embankments along Route 220 near Collinsville, Virginia were subject to severe erosion and loss of vegetative cover, particularly after heavy rainfalls. The problems were most severe on embankments with steep slopes. These problems persisted despite numerous attempts to stabilize the soil and control surface erosion.