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<br />whether pollution of surface or subsurface water is occurring, the probability of <br />continued pollution, and the estimated cost of abating such pollution. <br />The inspection commenced with an introduction by the mine operator of the history <br />and an overview of the mining activities and reclamation conducted at the mine. The <br />Division described the three phases of bond release. <br />720 Pit Reclamation <br />The field portion of the inspection started at the center portion of the 720 pit. The <br />backfilled and highwall reduced slopes of the 720 pit were measured with an abney <br />level. The approximate location of the measurements are shown on the <br />map below. There were several areas that were not to the approved grade of 3.5:1 <br />(28.7%). The approximate location these slopes are marked on the map. <br />notch in <br />highwall <br />720 f it <br />3F- 3~ ~ locations are approximate <br />3~ Ditch B-2 N <br />~~ <br />.'a3% 1 <br />area of ditch <br />- ~ e <br />w ~ <br />6% to 8% grade <br />Settling cracks were noted along the west side of the 720 pit. Some of the cracks <br />were at lower side of the fill area and others were at the highwall reduction and <br />highwall fill interface. The thickness of backfill could be up to 200 ft. thick, so <br />consolidation and associated cracking could be expected to occur. The Division, to <br />be safe, thought it would be prudent for the operator to calculate a safety factor for <br />'~ ~ <br />0 <br />0 <br />r ~~ <br />.o <br />~, Section of B-1 <br />_ be removed <br />G <br />Pods of excess <br />overburden <br />J <br />Area down to <br />original gr, <br />should be <br />straightened <br />Marr Strip, Bond Release <br />2 <br />May 24, 1994 <br />