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IV.C.9.a Railroad Loading Loop A railroad loading loop approximately 8,830 feet in length is <br />provided as shown on Map 103. The loop consists of a main line circuit with spurs provided for car and <br />locomotive storage, car and locomotive repair, and switching. Based on a 52-car unit coal train, the rail <br />track is level for a minimum distance of 3,200 feet on each side of the coal loading facility and has <br />straight length for 500 feet immediately before and after the coal loading facility. The curves on the rail <br />track do not exceed eight degrees on the main line and curves on spurs do not exceed 15 degrees. The <br />rail is 119 pounds, designed for Cooper E-74 loading and conforms to the requirements of the American <br />Railroad Engineers Association (AREA). The subgrade for the railroad was constructed from material <br />available along the railroad route. The ballast is a crusher-run rock and was constructed to a depth of 12 <br />inches below the ties with no subballast used. Standard 7"x9"x8'-6" railroad ties were used. Cuts for the <br />railroad have slopes of 2-1/2(h):1(v) except through areas of solid rock where slopes are 1/4(h):2(v). Fill <br />slopes are 2(h):2(v) unless othervvise noted on the maps. The existing ground on which fills were con- <br />structed was scarified, stepped, or, if in rock, keyed as required to increase the stability of the fill. <br />Upon completion of the site preparation or grading of a particular area in the railroad loop, all disturbed <br />areas which were not graveled, or othenrrise protected, were covered with the appropriate amount of <br />topsoil and revegetated. Rills or gullies which form in cut or fill slopes will be stabilized, regraded, <br />topsoiled, and revegetated as required. <br />A drainage control system (see Map 114) in and around the railroad loop consists of the following: <br />• (1) Diversion dikes and ditches which reroute runoff from undisturbed areas around disturbed <br />areas into natural drains. <br />(2) Interceptor ditches which collect runoff from disturbed areas and direct it into sedimentation <br />ponds. <br />(3) Sedimentation ponds which collect runoff from disturbed areas, hold the runoff a required <br />length of time (theoretical detention time) to allow settlement of solids and release the water <br />into the natural drains. <br />IV.C.9.b Office and Maintenance Facility The offices, warehouse and the locomotive and car <br />maintenance and storage building is located within the railroad loop. <br />The building is an insulated metal-sided building with built-up roofs. The architecture is compatible with <br />the surrounding terrain and the coal handling structures. The office-warehouse building houses offices <br />for operating and maintenance personnel, change rooms, locker rooms, and a spare parts warehouse <br />for the coal handling system. <br />The locomotive and car maintenance facility was designed around a preventive maintenance program. <br />The facility was designed to handle maintenance en ±he coal cars such as replacing wheelsets, draft <br />Mine Permit Renewal #3 (Rev. 8/99) IV-12 <br />.~ <br />