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Alpine will only mine beyond the reclamation limits shown on Map F if it can meet the following <br />condition: <br />Sufficient material is stockpiled on site to backfill the disturbed area to the reclamation topography. <br />The deficiency for backfilling at any time cannot exceed 10,000 cubic yards, as this is covered in the <br />proposed reclamation bond. <br />This will prevent Alpine from creating a situation where there is insufficient fill and bond available to <br />reclaim the operation. Alpine will demonstrate this material balance in each annual report to DRMS. <br />The processing area will initially be mined to the 3H:1 V slopes shown in the reclamation conditions, <br />and will remain that way most of the mine life. Expected mining depth of all pits is approximately 32 <br />feet. Once mining and reclamation is complete in the rest of the pit, the remainder of the processing <br />area will be mined out to the 1 H:1 V slope shown in the mining extents. The processing area will then <br />be backfilled and reclaimed according to Exhibit E. <br />Mining will take place over a set of 16 phases spread across the property. The layout of the phases can <br />be seen on Map C - 2. A breakdown of the acreage of each phase can be seen in Table D - 2. <br />Topsoil and Overburden <br />Topsoil and overburden make up the top three feet of material at the SSG site, with the topsoil being <br />the top 12 inches. Since Alpine Aggregates will be performing reclamation as they mine, most <br />overburden and topsoil will be placed in its final location immediately. Topsoil and overburden that <br />needs to be stockpiled will be stored in the processing area, Phase 1A or any of the other visual <br />screening berms. Visual screening berms can be seen on Map C -2. The processing area berm will be <br />roughly eight to ten feet high and have 2H:1 V side slopes.. All of the visual screening berms will have <br />2H:1 V side slopes, and will be irrigated initially to establish vegetation. <br />The Phase 1 A visual screening berm will be created by the stripping of the Phase 1 A mining area. <br />Subsequent berms will be constructed prior to mining in the adjacent mining area. <br />Steamboat Sand and Gravel Pit, April 2012 D - <br />