Wellpoint systems are used to lower groundwater levels to provide stable working conditions in excavations. Wellpoint systems are particularly suited for shallow foundations, utility and trench work dewatering. A wellpoint system consists of a series of closely spaced small diameter shallow wells. The wellpoints are connected to a common header pipe and are pumped with a high efficiency vacuum dewatering pump. For drawdowns in excess of 15-feet, further stages of wellpoints are required and installed at successively lower levels as excavation proceeds.

Deep well dewatering systems are used to lower groundwater levels to provide stable working conditions in excavations. A deep well system comprises of an array of drilled or jetted wells, each fitted with an electric submersible pump. This technique is particularly suited to deeper excavations or where artesian groundwater pressures threaten base stability. The system is reliable and the wide spacing of the wells reduces access restrictions to a minimum.