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road will be constructed at an approximately 2H:1 V slope. As required by Rule 4.03.1(3)(e), <br />• the fill should be constructed on stripped foundation surface. Since the ground surface at this <br />site is steeper than 3:1, a 10-foot keyway is required. The fill should utilize material obtained <br />from other road-cuts at the site. It should be clean of organic matter, and contain no coal- <br />related material. Compaction should be a minimum of 95 percent Standard Proctor <br />compaction (D-698, or AASHTO T-99) in maximum 12-inch lifts. Large particles that inhibit <br />proper lift development or compaction should be removed. Roads-cut in unconsolidated <br />material, as may be the case for some parts of the haul road, should be constructed at 2H:1 V <br />when possible. A vegetative cover should be placed immediately to stabilize fills and cut <br />slopes. Until fills and cut slopes can be stabilized using vegetation, other means such as a silt <br />fence may be used to control sediment. <br />The initial haul road on the east side of the coal mine waste bank is located in an area that <br />cannot be routed to the sediment pond. That is, runoff collected in the ditch can not be <br />routed to the sediment pond due to topographic constraints. A small area exemption from the <br />sediment control requirements is needed from the Division of Minerals and Geology, and best <br />management practices IBMP) should be used. For example, silt fences and revegetation will <br />• be used to capture sediment. Maintenance should be performed regularly to remove collected <br />sediment. Flows should be routed as necessary away from the road. <br />Haul roads will be surfaced with a minimum of six inches of crushed, durable rock material. <br />Surfaces will be graded to drain into adjacent drainage ditches, and will be maintained to avoid <br />ponding of water. <br />Haul roads will be reclaimed after their use for mining operations. All culverts will be removed, <br />and natural drainage patterns will be restored. Cut and fill locations wilt be recontoured to <br />match the surrounding topography. The road bed will be ripped and scarified as necessary <br />before the recontoured cut and fill slopes are revegetated. Terraces or other means wilt be <br />constructed to prevent excessive erosion. <br />C <br />95256/1424.RPT Coel Mine Waste Benk Daeipn for the Sanborn Creak Mine <br />October 1998 WESTEC, Inc. 9 <br />