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(in spoil). In general, these roads will be constructed and <br />• . maintained consistant with the guidelines listed under 4.03.1 <br />~ Haulroads, 2 CCR 407-2. All roads will be constructed at a <br />minimum width of 30 ft with drainage ditches and safety berms <br />wherever possible. <br />The proposed permit area will require 3 haul roads <br />outside the active pit areas. These will be the 2 main haul roads <br />from each pit to the crusher area (Figure 2) and the access road to <br />the property which is in place (Appendix L, Exhibit 1L). These roads <br />will be constructed as haulroads, 4.03.1-2 CCR 407-2, because they <br />will be used to transport coal. Under the specification of a haulroad, <br />the roads will have an overall grade less than 10 percent, with no <br />areas in excess of 15 percent. The roads will follow the natural <br />topography as much as possible, so cut and fill areas will be minimal. <br />Before the road is constructed, topsoil will be removed and stock- <br />piled for redistribution when the road is reclaimed. <br /> The BLM right of way coal haul road has drainage <br /> ditches, four culverts, and a cattle guard strategically placed <br /> to drain the road (appendix L, Exhibit 1L). The 24-inch culvert in <br /> Bush Draw drains approximately 354 acres of flat-lying terrain, which <br /> requires passage of up to about 48 cfs for the 10-year precipitation <br /> event. Consequently, the culvert may be slightly undersized. As <br /> a worst case, up to 40 acres of flat lying terrain is drained by <br /> roadside ditches. Using the CN=84, approximately 24 cfs/inch <br /> runoff must be carried by these ditches, resulting in a required <br /> capacity of (.48) (24)=11.5 cfs for the 10-year precipitation event. <br /> The drainage ditches illustrated in Figure 2 are more than <br /> adequate to carry this flow at grades of approximately 2 percent <br /> and represent minimum cross sections for roadside ditches. Wyoming <br /> Fuel requests that this existing road and drainage system be <br /> approved as is, since most of its approximate 2-mile leng*_h is <br /> elevated over flat lar.3 and has drained adequately in the past. <br />• If drainage problems develop, Wyoming Fuel will mitigate them as <br /> required. <br />-3z <br />