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6.4.5 Exhibit E - Reclamation Plan <br />Attachment A and is based on methods given in the USBR Design Standards No. <br />13, Embankment Dams Chapter 7. <br />The native water table surrounding the proposed pit boundaries is approximately <br />4-9 feet below existing ground surface. The liner has been designed to withstand <br />the hydrostatic pressure exerted against the liner wall due to groundwater, even <br />with the absence of water in the pond. Constructing the liner with the specified <br />thickness and compaction will accomplish this objective. Depression of the <br />surrounding water table will be accomplished through keeping the dewatering <br />gap open during construction. The liner will be constructed to meet the following <br />specifications: <br />a) The liner soil will contain a minimum of 50 percent material passing the <br />No. 200 sieve on a dry weight basis; <br />b) The liner soil will have a plasticity index between 10 and 35; <br />c) The percentage of gravel, defined as material retained on the No. 4 sieve, <br />will not exceed 10 percent; <br />d) The liner soil will be compacted to a minimum of 95 percent maximum dry <br />density as determined by the Standard Proctor (ASTM D698); <br />e) No brush, roots, sod, frozen material, or other deleterious or unsuitable <br />materials shall be incorporated into the fill. Fill shall not be placed upon <br />frozen material; <br />f) If moisture conditioning is required to meet the moisture content <br />specification, the added moisture shall be worked into the fill by harrowing <br />or other means until a uniform distribution of moisture is obtained; <br />g) Compacted soil liner fill shall be protected from desiccation and from <br />freezing. The finished soil liner will be covered as soon as practicable with <br />water as shown in the reclamation plan. If evidence of desiccation or frost <br />damage is observed, the soil liner will be reworked and retested as <br />necessary to demonstrate that the compaction specification is met, <br />h) Large rocks (greater than 2 inches) will be removed from the soil liner fill. <br />Soil clods larger than 4 inches will be broken up. <br />Construction Specification <br />A detailed construction procedure is given here to develop the basis for quality <br />assurance and provide the operators with a step by step schematic plan that will <br />guarantee a quality compacted liner. <br />Weathered shale Borrow Material Preparation and moisture Conditioning <br />Maintaining the proper moisture content will be critical to ensure adequate <br />compaction. It is highly recommended that the specified moisture content be <br />achieved prior to removing the shale from the pit floor. An area of pit floor shall <br />be disked, watered, then allowed to sit for a period until moisture content