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Exhibit F2 displays the extent of pit floor areas as mining elevations are lowered.The North Pit can be <br /> mined to near river level with continuous drainage.The South Pit can be mined to-45 feet with <br /> gravity drainage but beyond that, either deeper piping or pumping will be required.TBD. <br /> o R TF <br /> i6F 7 <br /> zrTt s s .. <br /> Q <br /> IL <br /> -19 <br /> Q � <br /> � o <br /> i� <br /> � > <br /> ` T <br /> t4 <br /> N <br /> o <br /> 0 <br /> . o t <br /> p.a <br /> W <br /> au CO 1 <br /> =. ILL ci o cn <br /> ILLCL <br /> LU <br /> O <br />