2008-07-10_REVISION - M2004009 (7)

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6.4.5 Exhibit E - Reclamation Plan conditioned, stripped from the pit floor and placed in lifts surrounding the perimeter of the mined-out and backfilled pit areas. Clay volumes are given in Table 6.4.5-2. The clay liner geometry is shown on Exhibit F-Reclamation Plan Map, Sheet 1. Clay material will be compacted in 1 ft. lifts to 95% dry density and at or up to 2% greater than the optimum moisture content. Geotechnical analysis of liner borrow materials and an engineered liner design will be prepared prior to the construction of the liner, however the 100% bonding option is requested. Costs to construct the clay liners are given in Exhibit L- Reclamation Costs. Table 6.4.5-2. Clay Liner Volumes Mining Cell Volume [yd 3] Cell 2 A 45,146 Cell 2 C 42,741 Cell 4 35,180 Slope Grading Slope grading will occur following all mining and concurrent reclamation. Material from the pit floor will be pushed with dozers for final grade. Slopes will be graded to a minimum of 3H:1V. Slope grading volumes are given in Table 6.4.5-3 Table 6.4.5-3 - Slope Grading Summary Mining Cell Volume [yd'] Cell 2 A 44,713 Cell 2 C 42,331 Cell 4 34,842 Surface Soil Replacement Final surface soil (overburden) replacement will begin following slope grading. Surface soil will be replaced to a minimum depth of 0.5 ft. A total of 50,000 yd3 will be replaced over approximately 61 acres. Interior haul roads will be ripped, graded, and surface soiled in preparation for revegetation. Seeding and Fertilizing Currently, shortgrass prairie is the dominant plant species. At present, the area is grazed all year around. Cover in the pasture is sparse all year as a result of the continuous grazing of cattle. The proposed seeding areas are shown on Exhibit F - Reclamation Plan Map. The recommended seeding method is by drill and seeding rates assume this