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6.4.5 Exhibit E - Reclamation Plan <br />3) Compact the backfill area that serves as the pipe subgrade to 95% dry <br />density. <br />4) Construct inlet wingwall as shown in the inlet detail of Exhibit F, Sheet 2 <br />5) Lay pipe and backfill concurrently to finished grade. <br />6) Construct pipe outlet riprap protection as shown in Exhibit F, Sheet 2. <br />Clay Liner Construction <br />Construction of the clay liners will occur following all mining and concurrent <br />reclamation activities for each lined cell. Clay material will be moisture <br />conditioned, stripped from the pit floor and placed in lifts surrounding the <br />perimeter of the mined-out and backfilled pit areas. Clay volumes are given in <br />Table 6.4.5-2. The clay liner geometry is shown on Exhibit F-Reclamation Plan <br />Map, Sheet 2. Clay material will be compacted in 1 ft. lifts to 95% dry density and <br />at or up to 2% greater than the optimum moisture content. Geotechnical analysis <br />of liner borrow materials and an engineered liner design has been prepared for <br />construction of the liner. That geotechnical report is being submitted with this <br />revised mine and reclamation plan and the DRMS should reduce the reclamation <br />bonding for the liner appropriately. Costs to construct the clay liners are given in <br />Exhibit L- Reclamation Costs. <br />Table 6.4.5-2. Clay Liner Volumes <br />Mining Cell Volume d <br />Cell 1 100,000 <br />Cell 2 A 45,146 <br />Cell 2 C 42,741 <br />Cell 4 35,180 <br />Surface Soil Replacement <br />Final surface soil (overburden) replacement will begin following backfilling, clay- <br />liner construction and all rough-grading on each appropriate cell. Surface soil will <br />be replaced to a minimum depth of 0.5 ft. A total of 50,000 yd3 will be replaced <br />over approximately 61 acres. <br />Interior haul roads will be ripped, graded, and surface soiled in preparation for <br />revegetation. <br />Seeding and Fertilizing <br />Currently, shortgrass prairie is the dominant plant species. At present, the area is <br />grazed all year around. Cover in the pasture is sparse all year as a result of the <br />continuous grazing of cattle. <br />The proposed seeding areas are shown on Exhibit F - Reclamation Plan Map. <br />The recommended seeding method is by drill and seeding rates assume this