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State Reg. <br />2.05.2(1) <br />2.05.3(1) <br />size for topsoil handling equipment. Overburden borings, <br />indicating type and amount of rock, as well as expected <br />production rates are examined in sizing blasthole drills and <br />pit tractors. Quantities of coal and rate of production are <br />the major determining factors in sizing loaders and haulage <br />equipment. The type and numbers of reclamation equipment are <br />dependent on a number of factors including quality and quantity <br />of spoil material to be graded, distances spoil must be moved, <br />projected postmine contour configuration, weather conditions, <br />etc. <br />Type and size of the coal processing facilities are determined <br />by the quality and quantity of coal produced, the type of <br />processing required, and the transportation facilities <br />available to handle the finished product. Service facilities <br />such as shops, office buildings, warehouses, bathhouses, powder <br />storage, electrical supply lines, water lines, etc. are all <br />designed using accepted engineering practices in the mining <br />industry and in conformance with all applicable state and <br />federal safety regulations. Table 12-1 lists all of the major <br />equipment currently in use at Seneca II. <br />With the coal reserve defined and equipment chosen, it becomes <br />the engineer's task to apply his technical expertise to the <br />design of a facilities site plan, pit progression layout and <br />ground control plan, haulage road system, surface water control <br />plan, sediment control plan, power distribution system, <br />postmine topography configuration and a variety of interrelated <br />projects. The processing and support facilities are generally <br />located at a site near the center of the resource area in order <br />to balance haulage distances. Factors such as topographic <br />relief, strength of foundation materials, adequacy of drainage, <br />accessibility, etc. are normally considered in the engineering <br />design. <br />The design of a pit progression plan is governed by several <br />factors including economic considerations, drainage patterns, <br />12-4 Revised 8/27/86 <br />• <br />• <br />• <br />