1983. - 158 р. Purpose and scope. This manual provides guidance for the planning, design, supervision, con- struction, and operation of dewatering and pressure relief systems and of seepage cutoffs for deep excava- tions for structures. It presents: description of various methods of dewatering and pressure reliefi techniques for determining groundwater conditions, characteris- tics of pervious aquifers, and dewatering require- ments; guidance for specifying requirements for de- watering and seepage control measures; guidance for determining the adequacy of designs and plans pre- pared by contractors; procedures for designing, install- ing, operating, and checking the performance of de- watering systems for various types of excavations; and descriptions and design of various types of cutoffs for controlling groundwater.
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