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1 <br />' <br /> III. AREAS iv11NED AND RECLAI(VIED IN ?000 <br /> <br /> 3.01 Central Quarry <br />' The Central Quarry was mined on all sides and the floor during 2000. By December 2000, <br /> mining in Central Quarry was substantially complete. Final highwalls were completed on <br /> Bench C and Bench D along the entire east, north, and west walls to approximate elevations <br />' of 6370 ft and 6330 ft, respectively. And final highwalls were completed above Bench B at <br /> the north end to an approximate elevation of 6410 fr. The geometry of the slope consists of <br /> 40 ft highwalls with 30 ft benches for Benches B and C, and a 40 ft highwall above Bench D. <br /> <br /> The Central Quarry Floor was lowered by mining to Bench D at El. 6330 ft. Relatively high <br /> specific gravity rock due to localized iron mineralization continued to be encountered in this <br /> mined area. <br /> 3.02 North Quarry <br />' D <br />2 <br />00 <br />i <br />i <br /> ur <br />ng <br />, min <br />0 <br />ng was completed within the north and west sections of the North Quarry. <br /> Final highwalls were completed on the north side on Benches 8, 7, 6, 5, and on the west side <br />' on Bench 4 to approximate elevations 6775 fr, 6730 ft, 6690 ft, 6650 ft, and 6615 ft, <br /> respectively. Mining continues within the central and eastern parts of the in North Quarry on <br /> Benches 4, 3, and 2. Mining has generally continued in a sequence of 40 fr highwalls with <br /> benches equal to or greater than 40 ft. <br /> During 2000, reclamation occurred in the North Quarry, Partial reclamation occurred on <br /> Benches 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, and 13, and included placement of compacted backfill <br />' lifts of topsoil, covering 8.60 acres. In areas where backfill material was placed for [he full <br /> height of the wall, backfill was sloped to meet the edges of each bench to make the overall <br />' slope smooth. <br /> <br /> <br /> <br /> <br /> <br />' G:\PROJECTS\'_0?00 Morrison Quarry\OpBf'_000\reponQ000 georechmcal adderNum doc <br />