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so long-term stockpiling of these materials is not anticipated. If overburden stockpiles are <br /> necessary, they will be located as berms along the perimeter of the mine or within the proposed <br /> mining phases for future reclamation purposes. <br /> Mining of the aggregate will progress down to the underlying sandstone claystone bedrock of the <br /> Browns Park formation. The bedrock material is rippable and, if necessary, may be excavated <br /> and used for reclamation. However, since reclamation will occur concurrently with mining, it is <br /> not anticipated that bedrock material will be stockpiled long-term prior to use. <br /> The active mining face will progress to the south. A portable crushing plant will process <br /> aggregate each year for 60 to 100 days. Each year the plant will be set up near the mining face. <br /> During mining and prior to reclamation, the phase walls will be a nearly vertical to %aH:IV slope. <br /> The aggregate material will be temporarily stockpiled or placed directly onto a conveyor system <br /> or haul truck units for transport to the customer area. <br /> In all phases the side slopes for the resultant lake will be constructed as the mining phases are <br /> excavated. Although the interior phase wall will remain disturbed and vertical until the phase is <br /> mined out, the exterior walls of the phase will be backfilled, graded to a 3H:IV slope, and seeded <br /> as mining progresses. Once backfilling and grading has been completed in an area, the top of the <br /> slope and the side slopes will be seeded as soon as practicable (based on first available seeding <br /> season). Additionally, areas on the pit floor not subject to traffic will be rough graded and seeded <br /> to reduce erosion. <br /> In order to gain an understanding of the extent of the mining operation, it is helpful to know the <br /> acres disturbed by different aspects of the mining operation. Each aspect is listed in the following <br /> table with associated disturbed area. The table illustrates a point in time where the mining <br /> disturbance will be at its maximum. This occurs during the mining in Phase 6. The mining <br /> disturbance will be at its greatest when Phase 6 has been mined out and prior to Phase 7. At this <br /> time, areas in Phases 1 and 2 to be reclaimed as wetland will be partially backfilled with process <br /> fines. Although reclamation along the exterior walls of Phase 6 will be in progress, the interior <br /> walls from Phases I through 6 will be at its greatest length. The asphalt plant, concrete plant, <br /> processing plant, and associated product stockpiles for each of these will be in place in the <br /> bottom of the mining pit. <br /> Disturbed Area <br /> Aspect Mining Operation Acres <br /> A Stripped overburden and topsoil in anticipation of mining 7 <br /> B Active mining face with 1/2H:1 V slope, 600 feet x 30 feet 0.4 <br /> C Interior wall with I/2H:1 V slope, 2100 feet x 30 feet 1.5 <br /> D Exterior wall being backfilled and graded to 3H:IV side slopes, <br /> 600 feet x 75 feet 1.1 <br /> E Top of slope and side slope above lake water level to be seeded, <br /> 600 feet x 60 feet 0.8 <br /> F Phase 3 — Phase 7 dewatering trenches, 4200 feet x 5 feet 0.5 <br /> River Valle,Resource <br /> DMG ll?Permit <br /> Page 6 <br />