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MINING PLAN (c stockpiled near an area that will be backfilled or will be placed as fill on quarry side slopes that are ready for final grading and topsoiling. As stated elsewhere, not all mined land can be reclaimed as the mining is completed. Some ]and must be left unreclaimed to provide access to other areas and for other uses. Where that must occur, sufficient soil will be stockpiled adjacent to those lands so it can be easily reclaimed when the need for using these lands ends. Where this stockpiling occurs the stockpiles will be seeded with the mixture shown in the Reclamation Plan, Exhibit E. The volume of salvageable soil on site has been estimated. These estimates are quite rough as soil characteristics can vary from the normal for a series. This can result in more or less soil than is calculated to be present based on the normal profile. The volumes presented here are based on a normal soil profile. The volume figures refer to topsoil only. The subsoil is not included in these volumes. In typical situations the topsoil portions constitutes about Ya of the total soil profile. Thus subsoil volumes, assuming the soils are fairly typical in thickness, will be about two to three times the topsoil volume. Soil Curecanti Variant (there will probab Nunn clay loam Existing stockpiles Roygorge Total Area 78.74 acres ly be about a 2~ 7.07 acres 25.53 acres Estimated Volume 168,740 cu yds (about 2150 cu yd/acre) reductiozt in volume after rock removal) 27,721 cu yds (about 3900 cu yd/acre) 3,000 cu yds (estimated) none to 3,200 cu yds (max=125 cu yd/ac) (salvage deeper pockets in limited area) Mlrilrig PCOCCSS (significant changes) The mining of this rock will be a comparatively simple process. The rock will be drilled, the holes filled with a blasting compound (probably ANFO), and the rock blasted. The drilling may be done in two lifts so as to minimize shock. The only difficulty in this mining process is the fact that the different sized rock materials must be produced. This will require careful control of the blasting pattern and intensity so the rock will fracture into pieces that will allow simple sorting to produce the various products. Past experience has shown this rock drills easily, even though very hard, and is brittle enough that it breaks easily. Therefore, any rocks that result from the blasting that are too large for any of the products needed can be broken into smaller pieces using impact. Once the rock is blasted it will be hauled via truck to the processing plant. It has been found that blasting alone can create a significant volume of rock sizes that are difficult to market. This material is stockpiled separate from the rest of the material that can be marketed as is. Every so often a portable crusher is brought into the site to crush the rock that is of an unusual size. This increases the resource recovery considerably. It was originally thought that most of the rock produced by blasting would be of proper sizes to meet the market needs, but the extreme hardness of this rock causes it to break into sizes that are not commonly used. Rather than waste the material (it is too large to use for backfill purposes in reclamation), it is crushed. When two areas are being operated at the same time (e.g. Area A and B) and the material mined must be kept separate for royalty calculation purposes. Clearly, either there must be two processing facilities or rock from each area processed in batches. It has not been determined which method will be used, but setting up two full fledged processing units would be capital intensive. A better option and one that will probably be used is to pre-process the rock from the most distant Table Mountain Quarry -Castle Concrete Company Exhibit D (Amendment 1) Page 6