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twelve inches or less for minus six inch material and 36 inches or less for larger material. Each layer is <br />leveled and compacted before the next layer is placed. <br />Embankment sideslopes are designed and censtructed no steeper than 2H:1 V, except where <br />embankment material is a minimum 85 percent rock, in which case slopes shall be no steeper than <br />1.35H:1 V. <br />Steeper sideslopes may be used if it is determined that the slope is stable and has a minimum factor of <br />safety of 1.3. <br />When compaction and density in-place tests are performed, they are conducted in accordance with <br />standard and approved methods. The standard proctor dry density is determined by laboratory tests in <br />accordance with AA.S.H.T.O., Standard Method T-99. The test for density in-place may be conducted <br />using a nuclear density probe or other comparable methods. <br />Unless required to be a greater width for use by draglines, haulroads are typically a minimum sixty-six <br />feet in width from shoukter to shoulder. A typical haulroad section is shown in Figure 3.7-1. <br />Crowning (or super elevation) of the road is provided to insure that the runoff drains away from the <br />road. <br />Haulroads are sometimes used for dragline walkroads. When this occurs, the crown is removed and <br />then usually replaced after the dragline has moved through the area. Crowning is seasonal. During fair <br />weather, crowning is according to the criteria stated. When snow and ice become a problem, most of <br />the crown is removed to keep the haul trucks from sliding off the roads. <br /> <br />3-183 <br />Revision: m_ Q` <br />Approved: ~}~-1999 <br />