Laserfiche WebLink
• equipment. The type and numbers of reclamation equipmenC are dependent on a number cf <br />factors, including quality and quantrty of spoil material [o be graded, distances spoil <br />must be moved, projected postm~ne contour configuration, and weather conditions. Type and <br />size of the coal processing facility are based upon the quality and quantity of coal <br />produced, the :ype of processing required, and the transportation facilities available [o <br />handle the finished product. Service facilities such as shops, office bu±lding s, <br />warehouses, bathhouses, ponder storage, electrical supply lines, and water lines that may <br />be constructed are designed to be in conformance with all applicable St a(e and Federal <br />safety regul ations.~ cable 721 lists [he major equipment currently planned for use a[ <br />Toast. <br />With the coal reserves defined and equipment chosen, i[ becomes the engineer's task [o <br />apply his technical ex per[ise t? the design of a facilities site plan, mining plan, ground <br />control plan, haulage road system, surface ua ter control plan, sediment control plan, <br />power distri button System, postmine contour canf iguratton, and a variety of inter-related <br />pr o; acts. the processing and supPOrt facilities are generally located at a site near the <br />center of the reserres in order to balance haulage distances. Factors such as [opog rape is <br />• relief, strength of foundation materials, adequacy of drainage and accessibility are <br />normally consider ed in the engineering design. The design of a mining plan is governed by <br />severai factors, including economic conslde rations, drainage patterns, relief, slope, and <br />geologic structures. Normal pit progression could begin a[ a "cropline" (outcropping) or <br />shallow area and progress toward the deeper coal. the advantage of [h i5 technique is a <br />loner production cost in early years. However, the cost of production becomes <br />progressively higher as the pits advance. At Toast, the geologic structure prevents [his <br />normal progression and pits must be oriented Somewhat perpendicular [o [he cropline. By <br />removing the overburden from cropline to recovery line in [he same pit, [he cost of <br />production is more constant over the life of the mine. the best techniques for <br />orientation of pits with respect to drainage patterns are to lay out a seq u=nee of pi [s <br />where the natural drainage is away from or parallel [o the pits. The techniques used at <br />Yoast to deal with [he relatively high relief, slopes, and geologic structure ui ll <br />discussed in the following section. A haulage road system is designed with roads of <br />appropriate width and grade to accommodate the rn[ended traffic. In mown [arnous terrain <br />wch as that found at Yoast, the construction of switchbacks is sometimes necessary to <br />maintain the flatest possible grade and minimize the area of dis[urba nc e. Safely berms <br />• will be utilized where required by steep side slopes. Surface water control plans <br />normally utilize ditches for overland diversion of surface water as well as pi[ sumps for <br />3 <br />