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• f <br /> The monitoring points as proposed by the Hucka report for <br /> monitoring any subsidence which may occur wi l 1 be installed' <br /> as the underground workings are advanced . When the workings <br /> are within 500 feet of the proposed monitoring points along <br /> the line of maximum subsidence , that point and the points <br /> along : the line perpendicular to the line of maximum <br /> subsidence at that point will be installed . if subsidence <br /> is recorded on the last point set before the mine is within <br /> 500 feet of that point , the next point and the points <br /> perpendicular to the 1 i ne of maximum subsidence at that <br /> point wi 1 1 be installed . Ea•_tsi de wi 1 1 monitor subsidence <br /> every three months . <br /> Subsidence monitoring results show no adverse impacts have <br /> developed due to the underground mining operation . <br /> Baseline monitoring of all monuments has been completed . <br /> The mini✓ is developed in about 650 feet . Monument No. 1 is <br /> the crnly nomument requiring monitoring until the mine is <br /> further developed. <br /> Surface wa.ter has been nomitor•ed on a quarterly basis. No <br /> changes in water quality or field parameters have been <br /> noted. <br /> r <br /> i <br /> Revised 4/89 <br /> 117 Revised 5:'87 <br />