In certain instances, dredging will become necessary in areas where environmentally harmful substances such as heavy metals and dioxins exist. In this respect, methods of dredging have been developed to ensure minimal adverse environmental impact when working under these conditions.

The Super Grab Bucket (SGB) Dredging Method provides a solution to remove dredged material whilst ensuring minimal water pollution when compared to other dredging methods. This method utilizes a specially designed bucket that minimizes leakage of turbid water. The bucket design is also such that over-dredging is avoided. As well as the reduced impact on the environment, this method is also cost effective in that in many instances the need to install a silt barricade or clean turbid water is minimized, thus saving costs in these respects.