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in reestablishment of a balanced piezometric surface at approximately the <br />• same level which existed prior to mining. Any minor changes in the <br />piezometric surface which may occur are not expected to be significant since <br />the overall hydrologic balance within the groundwater basin will not be <br />effected. <br />The localized cone of depression resulting from mine drainage will result in <br />a shift in groundwater flow direction in areas surrounding the active <br />workings toward the mine. This localized shift in flow direction is a <br />natural consequence of underground mining operations and represents the <br />hydrologic systems mechanism for reestablishing a balanced piezometric <br />surface. Localized changes in groundwater flow patterns are not expected to <br />extend for any significant distance beyond the perimeter of Southfield's mine <br />workings. In addition, reestablishment of the piezometric surface as <br />discussed in the preceding section will also result jn reestablishment of <br />natural groundwater flow patterns similar to those which existed prior to <br />mining. <br />• It should be noted that natural groundwater flows will tend to be deflected <br />toward the underground mine workings under the influence of the cone of <br />depression. This deflection will result in continuity of downgradient flow <br />and some natural mitigation of reductions in downgradient groundwater flows <br />as flow lines converge around the active mine area to reestablish lateral <br />flow continuity at some point downgradient. <br />• <br />•° ~ L <br />C:1TM\8601VOL.2\NEC.PLN <br />09/30/944:30Pm WP51/cmc 2.05.6.44 Revised 9/30/94 <br />