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• Six inches of topsoil was salvaged from undisturbed portions of the <br />RSRDA borrow area. It is estimated about one-half of the borrow <br />area has been previously disturbed by light use roads, the upper <br />diversion ditch and a prior borrow project, therefore it will be <br />assumed that an average of three inches of topsoil was recovered <br />from the entire area. The topsoil was stockpiled in a small area <br />below the borrow area. Reclamation of the borrow area involved <br />grading the borrow area to bend into the surrounding contours and <br />redistribution of the topsoil. The south diversion ditch was graded to <br />approximate original contours. <br />Cover material for the top of the RSRDA will be obtained from the <br />lower operations area of the Roadside South Portals. Approximately <br />4,500 cubic yards is required to cover the top of the pile with the <br />required 18 inches of non-toxic cover. Thus, 1,500 cubic yards of <br />plant grown media and 3,000 cubic yards of subsoil are required. <br />New page 11 of Appendix 9-7 shows the location of the proposed <br />borrow area boundaries and the volume of available material that <br />has the quality characteristics of topsoil and subsoil. The volume of <br />available material is much greater than the required volume. The <br />• Operator will perform additional soil sampling to refine and confirm <br />these boundaries prior to initiation of borrow activities. <br />Grading of the portal bench after sealing the portals will begin with <br />installation of the french drain shown on Exhibit 6C. The french drain <br />system has three branches. Two of the branches will intercept <br />seepage from the portal seals. The third branch is designed to <br />intercept water from the hillside southwest of the conveyor entry. <br />This third leg extends above the level of the portal entries to intercept <br />seepage along the existing hillside. The next reclamation step <br />involves grading concrete and cinderblock remaining from demolition <br />of the shop-office complex into the portal highwall. Sufficient <br />amounts of dirt will be mixed with this material to eliminate voids and <br />promote stability of the fill. Material will be cut from the west end of <br />the portal bench and dozed into the highwall. Topsoil was not <br />salvaged for this area, therefore the best available material from the <br />cut areas will be used for the final cover. An estimated 3 - 4 soil <br />samples taken while moving dirt in this area should identify the best <br />available material. <br />• 14-7 (Rev. 5/03) <br />