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Coulson Ezcavating Company, Inc. - Booser Gravel Pit <br />Exhibit E -Reclamation Plan <br />e) No brush, roots, sad, frozen material, or other deleterious or unsuitable materials shall be <br />incorporated into the fill. Fill shall not be placed upon frozen material, <br />f) If moisture conditioning is required to meet the moisture content specification, the added <br />moisture shall be worked into the fill by harrowing or other means until a uniform <br />distribution of moisture is obtained, <br />g) Compacted soil liner fill shall be protected from desiccation and from freezing. The <br />finished soil liner will be covered as soon as practicable with water as shown in the <br />reclamation plan. If evidence of desiccation or frost damage is observed, the soil liner <br />will be reworked and retested as necessary to demonstrate that the compaction <br />specification is met, <br />h) Large rocks (greater than 2 inches) will be removed from the soil liner fill. Soil clads <br />larger than 4 inches will be broken up. <br />Construction Procedure <br />A detailed construction procedure is given here to develop the basis for the quality assurance plan <br />(Appendix 1) and provide the operators with a step by step schematic plan that will guarantee a <br />quality compacted liner. <br />After the entve 65 acres of the permit area have been mined, and approximately 215,914 yd' of <br />liner material (weathered Pierre shale) is excavated from the pit, approximately 130,605 yd3 of <br />overburden will be taken from the stockpile around the permit area and filled onto the slopes of <br />the petmi[ area at a 2: I ratio. Liner material will be stockpiled adjacent to the borrow area. In <br />order to maintain moisture content, the liner material stockpile will be watered periodically. <br />The next step is to install drain tile! horizontal pumping well that will keep the water table <br />sufficiently low so as to allow installation of the lifts on top of a completely dry substrate. The <br />drain file trench will be installed approximately 4 ft above the gravel and weathered shale contact. <br />The trench will extend down 1 ft into the weathered shale for a total depth of 4-ft (see Figure 1: <br />Exhibit E). The well will be constructed with 4 in. drain file that will be back filled with gravel. <br />The drain file will be tied in to pumps that will serve to de-water the pit during construction of the <br />compacted liner. Construction of the liner will not begin until the pit is completely dry. <br />A backhce will then be used to dig a trench or keyway into bedrock. Weathered shale will be <br />backfilled and compacted into the keyway in the same way as described below. A conceptual <br />cross section of the liner is given in Figure 2, Exhibit E. <br />The next step will be to spread the liner material over the area to be lined to a depth of 2 ft. A <br />sheep's foot roller will then compact the lift by making no less than four passes over the entire <br />surface. The moisture content of the soil will be tested just prior to compaction of the first lift. <br />ASTM Method D-4643 will be used to determine field moisture content (see Appendix I). It is <br />expected from earlier field moisture content measurements that field moisture conditions are 3~ <br />wetter than optimum. The lift will be allowed to dry to the point of optimal moisture before <br />compaction will begin. The field inspector will calculate the drying rate as the day progresses and <br />measure field moisture content. Water will be added or lifts will be allowed to dry as needed to <br />maintain optimal moisture content throughout the compaction process. The volume of water <br />needed to raise the moisture content by 1 % has been calculated to be about 7546 gallons for 2 <br />