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Rifle Gravel Pit #1 January 2021 (Amendment to File No M-2020-008) <br /> 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 11. This figure shows the anticipated maximum <br /> slope gradient range for reclamation as depicted in the Typical Section. The site will need to <br /> take on fill dirt for a source of a disposal area for clean dirt and to fill part of the pit, <br /> minimizing the size of the pond and 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. Sheets C7 and C8 in the updated project drawings (Attachment <br /> A) provide specific information regarding the reclamation plans, final reclaimed pit pond <br /> footprint, typical section of the reclaimed pit, estimate of revegetation areas, including the <br /> types of vegetation. <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. Sheet C8 (Attachment A) provides detailed information <br /> regarding the various types of seed mixes proposed including form and application rate. <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. Sheet C8 (Attachment A) provides detailed <br /> information regarding the various types of seed mixes proposed including form (shrub, <br /> bunch, sod, etc.) and application rate. <br /> 6.3.4 Fertilization <br /> The proposed grass mixes will require little to no fertilization. <br /> 6.3.5 Revegetation <br /> When final landform is achieved, the surface will be stabilized by vegetation to reduce <br /> further soil erosion from wind or water, provide forage and cover, prevent dust as required <br /> by State Statute, and reduce visual impacts. A uniform vegetative cover will be established <br /> 25 <br />