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results. Soil material volumes and recovery and stockpiling operations are summarized by Table 49A, Soil <br />Stockpile Summary. <br />The existing soil stockpile falls within the footprint of the active CRDA. As the active placement area <br />expands, the existing stockpile will need to be moved. TC has identified an area just off the existing <br />Refuse Haulroad that would be readily accessible and will result in a relatively short haul for both <br />stockpiling and replacement of the soil material, as shown on Figure EX26D-F1. The proposed new soil <br />stockpile will be located on TC owned lands and includes previously disturbed areas near the existing <br />Weather Station (access road) and reclaimed spoil areas to the northeast. Site preparation will be limited <br />to construction of a short access road segment from the existing Refuse Haulroad, minor grading of the <br />existing disturbed areas in the vicinity of the Weather Station, removal of soil and suitable cover material <br />from any portions of the reclaimed areas within the new stockpile area footprint which need to be <br />regraded, and minor grading of the southern portion of the stockpile area to establish a suitable stockpile <br />foundation. The proposed new stockpile area drains to existing designed CRDA drainage structures, <br />(RDA -5A and RDA -7) so no additional drainage design or structures will be needed. It is anticipated that <br />a berm, sediment control material, and/or wattles will be placed on the downgradient side of the new soil <br />stockpile to limit sediment transport from the stockpile area in order to minimize ditch maintenance <br />requirements, and that the Stockpile (except for a limited active placement area) will be reseeded with a <br />temporary cover mixture to control erosion and sediment loss. Soil material volumes and recovery and <br />stockpiling operations are summarized by Table 49A, Soil Stockpile Summary. <br />Similar to the planned soil handling operations described, TCC will also recover, stockpile, and replace suitable <br />cover materials to meet the applicable regulatory standard of 4 feet of suitable cover over the regraded coal refuse <br />materials. Engineering projections indicate that a maximum of approximately 253,500 cubic yards of soil material, <br />and 571,600 cubic yards of suitable cover material will need to be recovered and replaced during the life of the <br />CRDA Expansion. Soil and cover material handling operations are summarized by Table 49A, Soil Stockpile <br />Summary, and in Exhibit 26C. Both soil and cover material stockpiles will be placed, graded, and stabilized to <br />prevent loss or contamination of these materials, and to minimize erosion potential. Potential runon and runoff <br />from the piles will be controlled by a closed system of ditches and berms, and the piles will be stabilized by seeding <br />with a rapid -germinating temporary cover seed -mix (refer to Table 54, Cropland Seed Mix). Soil stockpiles will be <br />posted with identifying signage, which will be maintained so long as material remains in the stockpile(s). <br />Construction of the Coal Refuse Haulroad will proceed simultaneously with soil and cover removal operations for <br />the refuse toe bench. The proposed haulroad will be approximately 2,300 feet long, with a traveled surface <br />approximately 30 feet wide. Following soil material removal from the road alignment, the road footprint will be <br />scarified and cut/fill operations will establish the general road configuration, as shown in the design documentation <br />provided in Exhibit 26C, Coal Refuse Disposal Area Expansion Designs. Fills will be placed and compacted in <br />uniform lifts of 6-8 inches. The road surface will consist of approximately 6 -inches of well -graded aggregate base, <br />overlain by approximately 18 -inches of pit run road base materials, compacted to 95 percent of maximum dry <br />density. Road drainage will be addessed by designed ditches and culverts, sized to safely pass the runoff from the <br />10 -year, 24-hour storm event. Design documentation and the required P.E certification for road designs are <br />presented in Exhibit 26C, Coal Refuse Disposal Area Expansion. The Coal Refuse Haulroad will provide for <br />material haulage from the Coal Refuse Hopper(s) to the CRDA Expansion area. Haulage within the CRDA <br />Expansion area, including haulage on benches, will occur on temporary roads established within the CRDA <br />footprint and typically on established refuse fill areas. <br />Following soil material removal, construction will begin on both the perimeter drainage control ditches and the <br />CRDA toe drain. Because the CRDA Expansion will be constructed in phases, initial perimeter ditches will be <br />constructed as temporary ditches, designed to safely pass the runoff from the 10 -year, 24-hour storm event. <br />Permanent perimeter ditches have been designed and will be constructed to safely pass the peak flows from the <br />100 -year, 24-hour design storm event. In order to control flow velocities and facilitate vegetative reestablishment <br />in the permanent perimeter ditches, temporary rock check -dams may be constructed in these ditches in accordance <br />with the design parameters previously outlined for the existing CRDA. Because infiltration through the pile to the <br />CRDA Expansion foundation area would occur gradually over time, regardless of storm event, the toe drain has <br />PR14-10 2.05-97.4 04/28/16 <br />