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• shown on Drawing No. MG-R-C-001. All hard, durable <br />sandstone will be utilized in the construction of the <br />underdrains and as riprap for perimeter drainage channels <br />for the refuse disposal facility. The remaining <br />stockpiled material will be utilized in reclamation of the <br />refuse pile and as fill material during reclamation of the <br />areas within the minesite. <br />I <br />i <br />i' - • <br />7.3 Pavement Section <br />The access road will be constructed using crushed, hard, <br />durable rock. Sandstone, excavated from the access road <br />area, will be utilized as base course material. The <br />typical surfacing section will consist of nine inches of <br />coarse crushed rock and six inches of fine crushed rock. <br />A typical section of the roadway is shown on Drawing No. <br />MG-R-C-004. The total thickness of the surfacing may vary <br />depending upon the subgrade material. <br />7.4 Drainage <br />As shown on Drawing MG-R-C-004, the access road will be <br />sloped to the inside drainage ditch at a 20 angle. All <br />surface drainage will flow into the inside ditch as shown <br />in the drawing. This ditch drains into the mine access <br />road drainage system, which ultimately flows into MBi. <br />• Ditch calculations are presented in Appendix A on page 3i. <br />-33- <br />