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Laboratory measurement of the shear strength parameters will be <br /> completed with in 90 days of this submittal. These values will be <br /> compared to those used in this design and an update will be <br /> submitted to MLRB. <br /> Geometry of the Waste *Bank <br /> Ten cross-sections, supplied by National King Coal, were used to <br /> model the geometry of the waste bank site. These sections extend <br /> from the west end of the existing pile, section 1, up the drainage <br /> at 100 ft increments to section 10. Figure 2 shows each of these 10 <br /> section with the 3h: ly fill slope superimposed on the existing <br /> geometry. As can be seen, a portion of the existing pile at section <br /> 1 exceeds the design slope an will require regrading. <br /> In order to use the desirable 3h: ly fill slope, the fill must <br /> extend across the valley floor. A 15 ft offset from the toe of the <br /> natural northeast hillside will be used for a channel and access <br /> road. The waste bank will begin at this location and extend upward <br /> at a 3h: ly slope until it intersects the natural ground. An example <br /> of this geometry is shown for section 5 in figure 1 The lateral <br /> extent of the existing waste pile is also shown on figure 3 . <br /> Earthwork volumes were computed using a computer routine which <br /> utilized the average end area method. Sections areas were computed <br /> using area by coordinates. Results of this analysis are shown in <br /> worksheets 1 and 2, in the appendix, for each of the cross <br /> sections. A total volume, as if the fill extended completely across <br /> the valley floor was initially computed. Then, a volume equal to <br /> that lost due to the 15 ft. offset was subtracted to arrive at the <br /> final volume for each reach. <br /> 4 <br />