Specifications include, but are not limited to: A) Bailing, Sump or Trench Pumping - For trench or structural excavations, and for small quantities of water, a sump or trench pump may be used to pump excess water from the low end of the excavations. When, as determined by the City representative, soil conditions are such that dewatering may readily be accomplished by ordinary bailing and use of trench pumps, well systems shall not be used. B) Well Systems - When required, the Contractor may utilize the following methods of dewatering: 1) Deep Pumped Wells Method - In locations where the water table is deep, pumped filtered wells may be used for lowering the water level or for controlling artesian pressures in aquifers beneath excavations. 2) Well Points Method - Well points are small-diameter wells with one or more slotted or screened sections of pipe attached to riser pipes that are connected through swing joints to header pipes. Special pump units lift the water with suction. Where a single row of well points is not enough to lower the water level adequately, then two (2) or more rows of well points shall be used as directed by the City representative.