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vehicle has been filled by loader the aggregate will either be <br /> carried to the crusher or stockpiled for future use. When <br /> gravel has been mined immediately inside the dewatering trench, <br /> the trench will be moved inward. <br /> 5. At this point the reclamation process can begin and continue <br /> concurrently with mining. When the inner dewatering trench is <br /> 1 completed, the outer bank of the first trench can be shaped, <br /> using the overburden stockpiled at the outer rim of the mining <br /> area. Once contours are shaped , topsoil is spread and the <br /> perimeter is planted. <br /> 6. Next the center area will be mined. <br /> 7. Reclamation will proceed in this center area with bulldozer <br /> filling the mined area with overburden where islands are to be <br /> created. The islands will be shaped, graded and planted. <br /> 8. Excess sand will be placed on lake banks below the proposed <br /> twater level. <br /> Earthmoving <br /> Bedrock in the area of the Nelson property is Pierre Shale of the <br /> Cretaceous age. It is covered by 5 to 20 feet of valley-fill <br /> imaterials of recent ages. These form the flood plain of Boulder <br /> ' Creek. See Figure 1 for a geological cross section of the site. <br /> Overburden in the proposed mining areas ranges from 1 to 5 <br /> feet. This overburden will be stripped and stockpiled separately <br /> for use in reclamation of the area. <br /> The remaining valley-fill material is primarily sand and gravel. <br /> D-3 <br />