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of traffic and the loads and weights of the vehicles. For the most part, only small embankments will be <br />. required and these will be built in single or double lifts. Density and moisture tests will not be necessary <br />since the anticipated traffic volume and load for "access roads" do not justify the tests. For the same <br />reason, it is not anticipated that structural or foundation analysis will be needed for any existing or future <br />access roads. <br />• <br />Typically, access roads are designed to accomodate the anticipated traffic use and normally do not <br />exceed a running surface width of 40 feet (refer to Figures 3.7-4 and 3.7-5). Actual widths may vary <br />depending upon the type of traffic anticipated. Should unusual conditions require that the running <br />surface width of a proposed access road be greater than 40 feet, Division approval will be requested. <br />Crowning and super elevation is provided as needed to ensure adequate road drainage and safety. If <br />crowning or super elevation are not used, the grade and location will be such that water will run off the <br />road surface. <br />3.7.3.3 Drainage <br />Access roads at the Trapper Mine are designed, constructed and maintained to provide adequate <br />drainage and safely pass the runoff from a ten-year, 24-hour event. <br />When possible, access roads are located to take advantage of sedimentation ponds. For the most part, <br />access road drainage provisions are very similar to haulroads (refer to 3.7.2.3). <br />Access roads do not cross ephemeral drainages of more than one square mile unless properly sized <br />culverts are provided. <br />3.7.3.4 Surfacing <br />Access roads at the Trapper Mine are surfaced as needed to withstand the volume and weight of the <br />anticipated traffic. Because the majority of access <br />3-172 <br />0 150 <br />61,T10 <br />