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compaction and sloping will be tracked in. Recontouring to a rough texture will support the <br /> establishment of broadcasted seeds and moisture retention. <br /> Stored topsoil and growth medium will be replaced evenly to a depth of 4-6 inches unless <br /> site conditions preclude this depth. Topsoil will also be left very rough. Soils will not be <br /> worked when wet to avoid mixing, loss of topsoil, and potential erosion issues. <br /> 6.3.2 Final Grading <br /> Final grading of the site is depicted in Figure 10. This figure shows the anticipated maximum <br /> slope gradient range for reclamation. The site will need to take on fill dirt for a source of a <br /> disposal area for clean dirt and to fill part of the pit, minimizing the size of the pond and <br /> reducing evaporation potential. <br /> The creation of a pond is planned for the site. Existing ephemeral draws and washes <br /> passing through the mine area will be reestablished or allowed to continue conveyance of <br /> ephemeral flows through the site. Details regarding surface water can be found in Exhibit C <br /> (Figure 4). <br /> 6.3.3 Seeding <br /> There are different types of seed mixes to support temporary and permanent stabilization <br /> and reclamation of the site. <br /> 6.3.3.1 Temporary Seed Mix <br /> Final seeding is best done in the late fall; therefore, if construction occurs in the summer, it <br /> may be desirable to apply a temporary seed mix to the area to help minimize erosion and <br /> provide some site stabilization. Temporary seed mixes are relatively inexpensive, and the <br /> large seeds germinate quickly. Two recommended varieties include: <br /> • Annual rye (Lolium multiflorum) <br /> • Regreen (a wheat and wheatgrass cross) <br /> Seeding can occur at a rate of around 20 lbs. per acre. <br /> 6.3.3.2 Long-Term/Permanent Seed Mix <br /> Seeding should occur in the late fall to avoid seeds from germinating in the summer or early <br /> fall, and then either desiccating or freezing. Drill seeding could be utilized on more level <br /> terrain, but broadcast seeding will likely be needed on steeper slopes. Drill seeding will be <br /> the preferred method where equipment access is feasible; seed will be placed in direct <br /> contact with the soil at an average depth of 0.5 inch. For drill seeding applications, small <br /> seeds shall be packaged separately to allow for separate application. The drill seeding rate <br /> is 18 lbs per acre and the broadcast seeding rate is 25 lbs per acre. <br /> Broadcast seeding will be employed in areas where drill seeding is not possible. Seed will <br /> be uniformly applied over the disturbed areas with manually operated cyclone-bucket <br /> spreaders or mechanical spreaders. The following seed mix is based on the surrounding <br /> pasture grass vegetation and likely long-term uses of the parcel. <br /> 21 <br />