![]() ![]() Riprap is often used for stabilization of construction sites. For slopes steeper than 2:1, consider using materials other than riprap for erosion protection such as turf reinforcement matting over seed, open-cell articulated concrete mats, or other slope protection geogrid products/matrices. Riprap may be unstable on very steep slopes. Because of the “hard” look of riprap, its higher overall cost, the growing popularity of vegetated solutions using turf reinforcement matting and other products, and the difficulty in removing it after installation, contractors should ensure that the post-construction site design specifically includes riprap before using it during construction. As noted above, riprap is especially useful for armoring channel and ditch banks, lake shorelines, and for sediment trap berms and high-volume/velocity check dams. Riprap is useful in areas in which the powers of erosion outweigh the stabilization capacity of other erosion control practices such as vegetative control and mulching. due to equipment and handling costs) and does not provide some of the secondary benefits provided by vegetated practices (e.g., habitat enhancement). ![]() However, riprap is typically more expensive to install compared to vegetation (i.e. Compared to other erosion control practices, riprap is relatively simple to install and maintain. Although riprap is not often considered aesthetically pleasing, it can be one of the most effective methods of erosion prevention and is particularly desirable in areas where conditions prohibit establishment of vegetation (for example, areas where velocities are too great for vegetation to withstand). ![]() ![]() Riprap is also effective for protecting and stabilizing slopes, channels, streambanks, and shorelines.Īs discussed above, there are many applications where riprap is more desirable than other erosion control practices. Applicable areas on a site may include inlets and outlets of storm pipes and culverts, bridges, slopes drains, storm drains, and other areas where concentrated runoff may occur. Riprap is used to stabilize areas on a construction site with high erosive power by increasing surface roughness and slowing the velocity of runoff.
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