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Road Techniques <br /> Ripping and Grading <br /> Existing berms on the outside of the roads shall be eliminated. The bermed material shall be <br /> removed to the inside edge of the roads. Material shall be placed preferentially, so that any <br /> existing ditches or depressions are filled first. The roads shall be graded so that the slope of <br /> the road is to the outside, rather than inside, portion of the roads. Material removed during <br /> the grading operation shall be filled on the inside portion of the roads, to facilitate drainage <br /> to the outside of the roads. An estimated 700 feet of the fan road will receive this treatment. <br /> Cut-Out Trenches <br /> Cut-out trenches will be excavated at selected locations along the upper 700 feet of this road. <br /> The trench locations will be marked in the field by the PROJECT MANAGER. It is estimated <br /> that seven (7) cut-out trenches will be constructed on this road. <br /> Rolling Dips <br /> Rolling dips will be constructed and paid for as described in Task 6, Surface Drainage: Rolling <br /> dips. The rolling dips shall be located in the field by the PROJECT MANAGER. Upon <br /> completion of the rolling dips, the road remnants will be ripped to a depth of twelve (12) <br /> inches. It is estimated that one (1) rolling dip will be constructed on the Mine 2 fan road. <br /> Task 4j - Coal Silo Area <br /> A backfill height of twenty (20) feet will be accomplished at the Coal Silo Area cut slope, <br /> located on the western portion of the Coal Silo bench below the Mine 1 area. Material for <br /> backfilling will be derived from three sources: 1) coal fines and other similar material which <br /> are spread out over the Coal Silo bench area, 2) from the southerly and easterly outslopes of <br /> the bench area, and 3) from the Mine 1 bench area outslope located immediately west and <br /> above the Coal Silo cut slope. Initially, the coal fines and similar materials will be excavated <br /> from the bench area and placed over and against the rubble fill placed during Task 2, <br /> Demolition. The coal fines and similar materials must be covered by a minimum of six (6) <br /> inches of additional materials to act as a growth medium. <br /> Additional fill material will be obtained from the Mine 1 bench outslope area, so that this area <br /> slopes to the top of the Coal Silo backfill at 1 H:1 V. Additional fill material may be obtained <br /> from the berm and outslope of the Coal Silo bench. Filled material will be compacted in six <br /> (6) foot lifts by sheep's foot roller. The excavated portion of the Coal Silo bench outslopes <br /> will be uniformly excavated such that no excavated slope exceeds 2H:1 V upon completion <br /> of the excavation. <br /> Upon completion of the task, the top of the fill will extend twenty (20) feet above the <br /> highwall bench remnant. This twenty (20) feet backfill height will be maintained for the <br /> length of the highwall, except where reduced by the PROJECT MANAGER. The highwall is <br /> estimated to be 200 feet in length. Upon completion, the outslope of the fill shall not exceed <br /> 2H:1 V. <br /> 18 <br />