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MINING PLAN <br /> As stated elsewhere, not all mined land in Stage 1 can be reclaimed as the mining is <br /> completed. Prior to mining the last section of Stage 1, some land must be left unreclaimed to <br /> provide access and other uses. Where that must occur, sufficient soil will be stockpiled adjacent to <br /> those lands so it can be easily reclaimed when the need for use ends. Where this stockpiling occurs <br /> the stockpiles will be seeded with the mixture shown in the Reclamation Plan, Exhibit E. <br /> The volume of salvageable soil on site has been estimated. These estimates are quite rough <br /> as soil characteristics can vary from the normal for a series. This can result in more or less soil <br /> than is calculated to be present based on the normal profile. The volumes presented here are based <br /> on a normal soil profile. The volume figures refer to topsoil only. The subsoil is not included in <br /> these volumes. In typical situations the topsoil portions constitutes about '1a of the total soil profile. <br /> Thus subsoil volumes, assuming the soils are fairly typical in thickness, will be about two to three <br /> times the topsoil volume. <br /> Soil Total Area Estimated Volume <br /> Curecanti Variant 21.7 acres 46,500 cu yds <br /> (there will probably be about a 25%a reduction in volume after rock removal) <br /> Nunn clay loam 1.9 acres 7,450 cu yds <br /> Existing stockpiles ------------ 3,000 cu yds (estimated) <br /> Roygorge 4.3 acres none to 500 cu yds <br /> Mining Process <br /> The mining of this rock will be a comparatively simple process. The rock will be drilled, <br /> the holes filled with a blasting compound (probably ANFO), and the rock blasted. The drilling will <br /> probably be done in two lifts so as to minimize shock and to help control the possibility of breaking <br /> through to the deposits underneath the quartzite. <br /> The only difficulty in this mining process is the fact that the different sized rock materials <br /> must be produced in the blasting process itself rather than the more usual route of crushing. This <br /> will require careful control of the blasting pattern and intensity so the rock will fracture into pieces <br /> that will allow simple sorting to produce the various products. The characteristics of this rock <br /> indicates that it drills easily, even though very hard, and is brittle enough that it breaks easily. <br /> Therefore, any rocks that result from the blasting that are too large for any of the products needed <br /> can be broken into smaller pieces using impact. <br /> Once the rock is blasted it will be hauled via truck to the sorting location which will <br /> probably be near the mining area. By keeping the sorting process near the mining area, any <br /> materials that result from the sorting process that cannot be used as a product can be easily used as <br /> a subsoil reconstruction in the reclamation process or to fill irregularities in the surface left after <br /> mining or as backfill of quarry side slopes. This process helps reduce the cost of hauling <br /> unmarketable materials back to the quarry from the stockpile area for use in reclamation. <br /> Processing and Haulage <br /> Processing of this material will involve minimal handling. No crushing is expected to occur <br /> as the rock is very hard resulting in a very high cost of crusher maintenance. The only processing <br /> Table Mountain Quarry - Castle Concrete Company Exhibit D Page D-6 <br />