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• • EXHIBIT E (Cont'd) <br />1 <br /> <br />1 <br /> <br />be decreased to approximately 2 to 1 by pushing the overburden stock- <br />piles along the west side of the pit back into the pit in the same <br />manner that is planned for the other sides. The Fox Hills formation <br />will be covered with overburden to the greatest extent possible. <br />After the slopes are established in each phase soil material <br />will be respread. In Phase O the soil is expected to average 9 <br />inches. Allowing for the irregularities of spreading, a depth of <br />~6 to 12~inches would not be unusual. In Phases 1 and 2 we estimate <br />an average thickness of 12 inches with a spreading variation from <br />\ /// <br />9 to 15 inches. It should be noted that the SCS estimates a uniform <br />18 inches of soil that it describes as brown cobbly, sandy loam <br />that is 50% to 75`~ cobble. The report does not make an estimate <br />of the percentages of sand. So we can only observe that of the <br />1 original 18 inches, something between 4 1/2 and 9 inches is sand <br />and loam. Under normally careful conditions of extraction and <br />respreading of this 18 inches of soil, it would appear reasonable <br />to expect approximately a 20jo loss of materials. Therefore, the <br />average soil thicknesses as detailed above appear to be attainable <br />1 with the material designated as soil by the SCS. <br />The overburden and soils in the area are very gravelly and <br />1 <br />sandy with some clay infilling. In general, it is expected that <br />the backfill materials will be porous and permeable. Normal rain- <br />. falls are not expected to ~cumulate.in this depressed area in <br />- ~ -~ <br />quantities large enough to create a standing water condition. <br />However, it is possible that unusually heavy rainfalls or run offs <br /> <br />13 (Revised) <br /> <br />