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• 2.05.3 <br />The majority of this road segment is designed at a 8% to 10% grade. To the <br />extent possible it is located along a ridge to provide the most stable <br />foundation possible. This haul road encroaches on ephemeral drainage C <br />at three separate locations. This ephemeral stream drains a watershed of <br />less than one-half square mile so the restrictions of rule 4.03.1(2)(b) do not <br />apply. <br />Design and Construction <br />For the construction of all of the roads on site, all vegetation material and <br />topsoil will be removed from the design road bed, shoulders, and surfaces <br />where associated structures will be placed. Topsoil will be placed in one of <br />the topsoil stockpiles located on site. No vegetation material or topsoil will <br />be placed beneath or in any haul road embankment. <br />The following embankment specification applies to road sections not within <br />the disturbed area in accordance with Rule 4.05.2(4). In the placement of <br />• embankment for the haul road, materials will be spread in layers <br />approximately 12 inches deep, and such lifts made uniformly over long <br />stretches and for the full width of the embankment. Each lift will be <br />moistened or dried to a uniform moisture content suitable for maximum <br />compaction. Hauling equipment will be routed both ways over the fill and <br />routing varied sufficiently to achieve uniform compaction. Compaction will <br />be carried to the edge of the fills so that the final slopes are firm. A <br />sheepsfoot roller or other suitable equipment may be required to achieve <br />compaction. Compaction of each lift will continue until the unit dry weight of <br />the lift reaches a value not less than 90% of maximum unit dry weight <br />attained in a laboratory compaction test in accordance with the specifications <br />of ASTM D 698, Method D. <br />Where the embankment is placed against the existing slopes, the slopes will <br />be benched and scarified down to a firm dense base as the new fill is being <br />placed. Material so loosened will be mixed with the new fill and the resultant <br />mix blended firmly into the slope. <br />When rock or rocky material is used for embankment, placement shall be in <br />layers not exceeding the maximum size of the rock present, and in no case <br />shall lifts exceed 30 inches in depth. Rock layers shall be compacted by <br />PR-07 2.05 - 20 - 2/03 <br />/~ P~RoV~ <br />S~/11o3 <br />