DamBag™ uses environmentally friendly materials in its construction. This means that it can be used in any sensitive environment, especially in/or around watersheds. Our units have been buried or used above ground to dam off sections of rivers for construction projects. They can also be used to hold back lakes or seashore to allow work to be done on piers, docks, shorelines, etc. The materials being used are from the surrounding environment so once the bag is used for its purpose, just pull it up and the materials wind up back in the environment. Its a perfect scenario for the crews doing the work and for the project engineers.