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well as the portable plant site can be placed below the existing grade within the mining <br />boundary. <br />Topsoil Handling Plan <br />As stated previously the topsoil will be stripped to expose the aggregate product <br />underlying the topsoil. The topsoil will be stripped using scrapers and stockpiled in the <br />topsoil stockpile as depicted in Exhibit C. The volume of topsoil is approximately 25,700 <br />cubic yards. The depth of the topsoil is approximately six inches over the majority of the <br />mining area. The topsoil will be stripped and stockpiled during Phase 1A - 1C. The <br />height of the topsoil stockpile will be approximately 15 feet. <br />Mine Phasing <br />Broken Arrow Investments, LLC anticipates mining and reclaiming the Derr Pit Project <br />site in approximately 15 - 18 years. It is anticipated that Broken Arrow Investments, LLC <br />would mine to a depth of 3 - 6 feet in Phase 1A - 1C of the mining plan encompassing <br />a total of 27.98 acres of the mining limits and groundwater would not be exposed. <br />Phases 2 - 7 would be mined to a depth of 70 - 90 feet with each phase being 4.84 - <br />6.00 acres. However, it is possible that due to demand fluctuations, mining could <br />progress slower than anticipated and additional time may be required for mining and <br />reclamation of the site. After the initial 27.98 acres is mined to a depth of 3 - 6 feet the <br />mining operations will continue to expand as needed from the southeast comer in order <br />of the phases shown on the Mining Plan until mining is completed. <br />The mining will progress in each phase beginning at the outer edge of the phase where <br />material will be moved toward the interior of the phase such that a 3H:1 V mining slope <br />can be established on the exterior of the phase. The mining slope will be established for <br />the entire perimeter of the phase in 3 to 6 feet intervals. In Phases 2-7 a dewatering <br />trench around the perimeter will be placed at the toe of the 3H:1 V mining slope. As the <br />phase is mined deeper the dewatering trench will be lowered and moved laterally along <br />the 3H:1 V mining slope toward the center of that phase. Once the interior footprint <br />becomes small enough where the 3H:1 V mining slopes from three to four sides are <br />encroaching upon the portable plant and haul roads another phase will be opened to <br />continue mining. <br />Dewatering <br />Dewatering trenches will be placed along the perimeter of each mining area in Phases <br />2-7. The dewatering trench around the perimeter of the phase being mined will be <br />placed at the toe of the 3H:1 V mining slope. As the phase is mined deeper the <br />dewatering trench will be lowered and moved laterally along the 3H:1 V mining slope <br />toward the center of that phase. Once the interior area becomes small enough where <br />the 3HA V mining slopes from three to four sides are encroaching upon the portable <br />plant and haul roads another phase will be opened to continue mining. The slung wall is <br />anticipated to be installed prior to Phase 2 being mined, and it is expected minimal <br />dewatering will be required in the subsequent phases due to the slurry wall cutting off <br />groundwater infiltration into the pit. <br />Derr Pit Project <br />J&T Consulting, Inc. DRMS 112 Permit <br />0.1