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thickness. Rock will be placed in a manner that will ensure proper placement in the <br />embankment, so that voids, pockets, and bridging will be reduced to a minimum. The final <br />layer of the embankment will meet the requirements of 4.03.2(3 )(d)(iv). <br />Each layer of the embankment will be completed, leveled, end compacted before the <br />succeeding layer is placed. Embankment materiel will be leveled es placed and kept <br />smooth. Compaction will be performed to the extend necessary to ensure stability. <br />Material will be placed in an embankment under moisture content conditions which will <br />permit compaction and ensure proper soil cohesion. <br />Embankment slopes will not be steeper then 1. Sh:ty, except that if the embankment <br />material is a minimum of 85 percent rock, slopes will not be steeper than [.35h:1v if it <br />has been demonstrated to the Division that embankment stability will result. <br />The minimum safety factor for all embankments will be 7.25, or such higher factor as the <br />Division may specify. A lower safety factor may be approved if geotechnical analysis <br />demonstrates that it will not result in significant environmental harm or harm to the <br />public health end safety. <br />Erosion Control. Temporary erosion control measures will be implemented during <br />embankment construction to control sedimentation and minimize erosion until permanent <br />control measures can be established. Immediately upon completion, measures will be taken <br />to stabilize all embankments with a vegetation cover or other means as approved by the <br />Division to minimize erosion. Where a vegetation cover is used, consideration will be <br />given to providing an appropriate growth medium. <br />Topsoil. Topsoil and other materials as determined under 4.06.2 will be removed from the <br />design roadbed, shoulders, end surfaces where associated structures will be placed, and <br />will be stored in accordance with 4.06.3. <br />Drainage. Each access road will be designed, constructed, or reconstructed, and <br />maintained to have adequate drainage, using structures, such as, but not limited to <br />ditches, cross drains, ditch relief drains, culverts and bridges. The water-control <br />• system will be designed to safely pass peek runoff from a 10-year, 24-hour precipitation <br />event or a greater event if required by the Division. <br />11 <br />