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EXHIBIT D - NIINING PLAN NARRATIVE (CONTINUED) <br /> A summary of how each area will be mined is as follows: <br /> Area 1 - This area will be wet mined, and backfilled with sand spoils from this area and other <br /> mining areas of the property. There will be no import of material for backfilling from <br /> out of the permit area. Approximately 8,000 cubic yards of topsoiUoverburden will <br /> be stored and temporarily revegetated in the 25' setback area along the east side of <br /> this area and the south side of Area 2B for later permanent revegetation. No mining <br /> into the water table will be undertaken, until a temporary augmentation plan has been <br /> approved. <br /> Area 2A - The slurry wall has been installed in the areas shown on the accompanying maps. The <br /> South Platte River Channel improvements are still to be installed. The present plan <br /> calls for removal of the existing berm along the southern portion of this area, <br /> installation of two riprap trenches, and installation of a grade control structure. The <br /> slurry wall along the River has been installed behind (east and south) of where the <br /> riprap trenches and grade control structures will be installed. The exact location and <br /> alignment of the South Platte River Channel improvements are conceptually shown <br /> on the MINING PLAN MAP, EXHIBIT C-2, but the actual alignment was <br /> determined by final engineering and approval of UD&FCD. No mining will occur <br /> north and west of the riprap trenches and other channel improvements. <br /> Area 2B - The slurry wall has also been installed in this area as shown on the accompanying <br /> map. Approximately 8,000 cubic yards of topsoil/overburden will be stored and <br /> temporarily revegetated in the 25' setback area with the stored material from Area 1. <br /> This topsoiUoverburden storage will remain until the end of mining to act as a <br /> permanent reserve for revegetation. However, as much as possible, <br /> topsoil/overburden will be immediately used in previously mined areas to build the <br /> required slopes of the reservoir and for revegetation of the banks/periphery areas. <br /> Topsoil/overburden may also be temporarily stored on the future berm along the <br /> South Platte River outside of the South Platte River floodway, and/or in other 25' <br /> periphery setback areas. <br /> Area 2C - Approximately 55,OOOt cubic yards will be stored along the south 25' setback of that <br /> area to potentially revegetate the entire 34f acres of Area 2C, although this area will <br /> be filled with sand spoils as much as possible. This topsoiUoverburden storage areas <br /> will remain to the end of mining to act as a permanent reserve for revegetation. No <br /> mining into the water table will be undertaken, until a temporary augmentation plan <br /> has been approved. <br /> Page 4, EXHBIT D <br />