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MINING PLAN <br /> moist sand which would result in essentially no or very little sand recovery being possible. In effect, <br /> at some point along a west to east line across the reservoir site, possible sand recovery will decline to <br /> essentially zero. Based on water table depths derived from monitoring wells it appears that point is <br /> about 100 feet east of the upper water zone extraction wells. It might extend somewhat further east, , <br /> but that does not appear likely due to decreasing water table depth and increasing soil depth. © <br /> The actual�amount of il to be removed cannot be determined as that is regulated by the j <br /> point at which comparatively clean sand is encountered. In the western portions of the Little Johnson <br /> area that depth is probably no more than a few feet, but as the extraction moves eastward this depth f <br /> is likely to increase to several feet. As described in the soil information, it is likely that some of the <br /> fines that accumulated on the bottom of the reservoir, over time, worked their way down into the <br /> underlying sand thereby contaminating it and rendering it difficult to wash into a marketable product. <br /> Once again, it is not known how deep this infiltration (illuviation) actually extended but it <br /> undoubtedly occurred to some extent.- <br /> Stockpiling of the soil will occur in the southwestern corner of the Little Johnson area(see <br /> Exhibit LJ C-4). It is likely that silt fencing will be needed along the east side of the stockpile area to <br /> prevent sediment from entering the wetlands east of the stockpile. This stockpile location was <br /> selected and designated at the request of the landowner. to anticipate possiMe ffiture uses of d <br /> reservoir. Stockpiling at this location provides for a versatile future <br /> use of the soil in the event the final reclamation must change before the reclamation described in <br /> Exhibit E is implemented. During the soil and overburden removal it is important to monitor the <br /> underlying material as it is exposed to watch for a rapid moistening of the exposed material. In <br /> effect, soil removal depth is ultimately regulated by the same criteria that regulates the mining: when <br /> moist material is encountered removal must stop. <br /> The wide zone between the expected mining limit and the affected land boundary is intended <br /> to provide locations for temporary soil stockpiling(before moving the soil to the stockpile area) and <br /> for equipment access to the eastern portions of the mining area. <br /> Protection for the stockpiled topsoil is required. The stockpiles should have side slopes not <br /> steeper than 2:1 (the less steep the better). After stockpiling is completed and the piles have been <br /> graded, the following seed mixture will be spread on the soil. Although weed growth is likely to be <br /> abundant and provide excellent protection, it is desirable to have some of the species that will be <br /> used in the final revegetation also growing on the soil stockpiles. This will build an additional seed <br /> bank in the soil that can add to the success of the final revegetation. <br /> Daniels Sand Pit Amendment (2008) Exhibit D Page 13 of 28 <br />