Ground water removal is widely used for shallow depth excavations. Under favorable ground conditions, a well drilling system can be quickly installed and operationalized quickly. A typical well inspection system consists of small diameter wells (known as well points) connected via a header pipe to the suction side of a suitable well pump. The pump creates a vacuum in the header pipe to draw water from the ground. In long pipeline trenches, horizontal well spots can be established with special trenching machines. A typical dewatering kit is between 50 and 68 well points connected to a 150mm (6″) dewatering pump. Multiple pumps can be used or additional wellbore points can be added to increase water intake. During the piping process, the dewatering well points prior to pipeline installation removed and reinstalled. As galvanized steel spears are stronger and sturdy, we prefer to use steel pipe well point spears instead of plastic PVC.
