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so that the road sheds water as sheet flow over the edge of the bench. <br /> Grading of the road between the fan and substation location described above, and Mine 2 <br /> shall be accomplished. An estimated four hundred (400) feet of roadway will be graded to <br /> shed water toward the outslope of the road. Existing berms on the outside of the road shall <br /> be eliminated. The bermed material shall be removed to the inside edge of the road. Material <br /> shall be placed preferentially, so that any existing ditches or depressions are filled first. The <br /> road shall be graded so that the slope of the road is to the outside, 0.5% to 2%, rather than <br /> inside portion of the road. Material removed during the grading operation shall be filled on the <br /> inside portion of the road at slopes not steeper than 3H:1 V, to facilitate drainage to the <br /> outside of the road. The remaining road remnant shall be ripped to a depth of eighteen (18) <br /> inches where soil depth allows. One rolling dip will be constructed along this segment of <br /> road. The location will be marked in the field by the PROJECT MANAGER. The rolling dip will <br /> be constructed and paid for under Task 6, Surface Drainage: Rolling Dips. <br /> Task 4e - Mine 2 <br /> The Mine 2 entry has been sealed with a concrete block wall located an estimated seventy <br /> five (75) feet inside the inclined entry. A large half-round corrugated metal shrouding <br /> measuring fifteen (15) feet wide and nine (9) feet tall, protrudes from the entry onto the mine <br /> bench. The half-round corrugated metal shroud must be completely filled with earthen <br /> materials, or with rubbelized debris as described in Task 2, Demolition. The entry must be <br /> filled from the block wall to the outside edge of the shroud, and from floor to roof. Care must <br /> be exercised to ensure that no damage to the block wall occurs. <br /> At Mine 2, the ground slopes away from the entry at grades of up to 20 degrees. In order <br /> to ensure that the backfill is stable, the ground in front of the entry shall be excavated so that <br /> a flat foundation for the backfill is created. The bench shall be the width of the entry, and <br /> extend a minimum of twenty four (24) feet from the mine entry. The backfill shall be twelve <br /> (12) feet in height as measured from the base of the half round corrugated metal shroud. The <br /> backfill shall be compacted every six (6) feet using a sheep's foot roller. Upon completion, <br /> the outslope of the backfill shall not exceed 2H:1 V. <br /> A large foundation exists about seventy five (75) feet downslope from the Mine 2 entry, and <br /> parallel to the conveyor corridor. This foundation will be demolished under Task 2, <br /> Demolition, and either removed to the Mine 2 entry, or left in place. The foundation area will <br /> be backfilled. The estimated height of the backfill is twenty (20) feet, with an estimated <br /> width of fifteen (15) feet. Any debris or rubble to be disposed of at this site shall be covered <br /> by a minimum of four (4) feet of earthen materials during completion of this Task. The fill <br /> shall be compacted every five (5) feet with a sheep's foot roller. Upon completion, the <br /> outslope of the fill shall not exceed 1 .5H:1 V. <br /> Task 4f - Mine 2 Conveyor <br /> The Mine 2 conveyor corridor will be graded to create eight (8) water bars perpendicular to <br /> the slope of the conveyor corridor. These water bars shall be a minimum of eighteen (18) <br /> inches tall and six (6) feet wide at the base. The outslopes shall not exceed 2H:1 V. The <br /> water bars shall extend across the width of the conveyor corridor, which is estimated to be <br /> 15 <br />