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~ twelve inches or less for minus six inch material and 36 inches or less for <br />• larger material. Each layer is leveled and compacted before the next layer is <br />placed. <br />Embankment sideslopes are designed and constructed at 1V>2H. <br />Steeper sideslopes may be used if it is determined that the slope is stable and <br />has a factor of safety of 1.25 or greater. <br />When compaction and density in-place tests are performed, they are conducted in <br />accordance with standard and approved methods. The standard proctor dry density <br />is determined by laboratory tests in accordance with A.A.S.H.T.O., Standard <br />Method T-99. The test for density in-place may be conducted using a nuclear den- <br />sity probe or other comparable methods. <br /> Unless required to be 100 feet in width for use by the draglines, haulroads are <br /> approximately sixty feet in width from shoulder to shoulder. Cut and fill sec- <br />,~ lions are designed according to Figures 3.7-1 and 3.7-2. A typical haul road <br /> section is shown in Figure 3.7-3A. <br />Crowning (or super elevation) of the road is provided to insure that the runoff <br />drains away from the road. The roads are crowned or elevated according to the <br />following minimum criteria: <br />Crown - 1/4 inch per linear foot. <br />Super Elevation - 1/4 inch per linear foot, <br />Haulroads are sometimes used for a dragline walkroad, k'hen this occurs, the <br />crown is removed and then later replaced after the dragline has moved through the <br />area. Crowning is seasonal. During fair weather, crowning is according to the <br />criteria stated. However, when snow and ice become a problem, most of the crown <br />is removed to keep the haul trucks from sliding off the roads, <br /> <br />3-163 <br />REVISED FEB 13 '87 <br />