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October 19, 2017 <br />Page ES -3 <br />• Horizontal dewatering wells may be used to provide localized depressurization of the <br />slopes if specific pockets are observed to not be responding to the vertical wells. <br />Horizontal wells may not be very effective on the advancing highwall slopes, but can <br />provide pressure relief in the low wall and sidewalls. Horizontal wells can also be <br />difficult to construct at a sloping bench face. <br />Agapito Associates, Inc. <br />