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• configuration and grade, riprap or other erosion control materials (if required) aze placed <br />to limit erosion and control flow velocities. Culvert installation involves excavation to <br />competent material; placement of bedding material; culvert installation; placement and <br />compaction of fill and cover material around and over the culvert; and placement of <br />appropriate headwall and outlet protection, where required. On completion of road <br />construction, associated cut slopes and embankment outslopes aze seeded and mulched to <br />stabilize the slopes and minimize erosion potential. <br /> <br />All roads are designed and constructed to prevent ponding of water on the road surface. <br />This typically involves establishing a smooth graded surface that slopes back into the <br />hillside so that any surface runoff flows to the designed road drainage ditches. Because <br />they are used on a regular basis, haul and access roads aze typically surfaced with from <br />two to six inches of gravel, or crushed road-base material. Light-use roads are typically <br />surfaced with either suitable granular material or a thin (0-2 inches) layer of gravel or <br />crushed road-base material. <br />Design and construction of haul roads is certified by a qualified Registered Professional <br />Engineer, consistent with applicable provisions of Rule 4.03.1(1)(d)(i). If conditions or <br />materials are encountered, during the course of road construction, which aze significantly <br />different than those assumed and used in the road design, the engineer supervising road <br />construction activities will determine whether or not additional design analyses and/or <br />specific construction measures are warranted to assure road stability. Road maintenance <br />normally involves periodic grading, watering to control dust, placement of additional <br />surfacing material, clean-out of road ditches and culverts, and repair of any significant <br />erosion or damage. On completion of mining, any roads not required to support ongoing <br />or anticipated future operations and not approved as permanent roads to support <br />postmining land uses will be removed and reclaimed, as described in Section 2.05.4 of <br />the Mining and Reclamation Plan document. <br />This design report was prepared by Jerry Nettleton as the Project Engineer, the road <br />stability analyses were completed by John Pellicer, Registered Professional Engineer, and <br />the overall report hasheen reviewed and certified by Thomas E. Leidich, Registered <br />Jerry ri <br />Project <br />imt. <br />Ri <br />Jo Pellicer <br />R gistered Professi <br />P.E. No. 31222 <br /> <br />r1 <br />U <br />rThomas E. Leidich <br />Registered Professional <br />P.E. No. 31459 <br />TR-43 <br />v.,.._ ~ ~ <br />~s~~h~Al EC;,~`'\~ <br />September 2003 <br />