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Earth Moving <br /> Areas to be mined are prepared by removal of topsoil and overburden. Each preparation area <br /> may be 100 feet or more in front of the mining operation. Where it is found, surface topsoil <br /> material will be stripped separate from the underlying, deeper subsoil or overburden material. <br /> This topsoil layer contains most of the soils organic matter and will be stockpiled separately for <br /> use in reclamation. Once the surface layer has been removed, the rest of the overburden will be <br /> stripped and stockpiled separate from the surface layer. Due to the short time frame of the <br /> mining operation, it is anticipated that stockpiles will not remain through a growing season. <br /> Therefore, the stockpiles will not be seeded for stabilization. <br /> During mining and prior to reclamation, the mining face and walls will be a nearly vertical to <br /> '/2H:1 V slope (see Exhibit E, Mining Plan Map). Mining will progress down to the depth of <br /> quality aggregate material or about 10 feet below the surface. As the mining face progresses, pit <br /> sidewalls will behind the mining activities will be reclaimed. So that reclamation activities do <br /> not interfere with mining operations, pit sidewalls may extend 300 feet behind the active mining <br /> face without being reclaimed. The aggregate material will be recovered using equipment typical <br /> for sand and gravel mining operations. Earth moving equipment may include,but are not limited <br /> to dozers, loaders, scrapers, and excavators. The aggregate material from the pit will be <br /> temporarily stockpiled within the pit or transported directly for processing or off the site. During <br /> mining and reclamation activities, watering trucks for dust control will be used as needed. <br /> Setbacks from the mine pit top of slope to the proposed permit boundary or man-made structures <br /> not owned by the applicant will be 20 feet or greater. For setbacks adjacent to a man-made <br /> structure not owned by the applicant that are less than 20 feet, an agreement will obtained from <br /> the property owner or an engineering slope stability analysis will be performed. Setbacks from <br /> near vertical mining excavations to the permit boundary will be a minimum of 20 feet. <br /> Topsoil and overburden material excavated from the pit will be stockpiled and used for <br /> backfilling mine pit slopes and other reclamation activities. The non-marketable material <br /> stockpiles will be created adjacent to the areas that will be backfilled or on the pit floor. When <br /> sufficient material is available in the stockpile, the material will be backfilled into previously <br /> mined areas. <br /> The side slopes of the mine pit will be backfilled, graded to a minimum 3H:1 V slope, and seeded <br /> as mining progresses. Approximately 4,150 feet of pit side slopes will be created during mining. <br /> Since reclamation is anticipated to be concurrent with mining operations, the actual length of <br /> side slope requiring backfilling and grading at any point in time is expected to be far less than <br /> 4,150 feet. The majority of the pit depth is anticipated to be near 10 feet high. Once backfilling <br /> and final grading has been completed in an area, the top of the slope and the side slopes will be <br /> seeded as soon as practicable (based on first available seeding season). <br /> Since reclamation will take place concurrently with mining, large and long-term topsoil and <br /> overburden stockpiling is not anticipated. Topsoil and overburden stockpiles will be configured <br /> to have side-slopes no steeper than 2H:1 V. If the stockpiles are inactive for more than one <br /> growing season they will be seeded with the fast growing grass seed mixture in the table below. <br /> However, since the stockpile materials will continually be used for reclamation, the stockpiles <br /> Harmony Gardens Site <br /> DRMS Limited Impact 110 Permit Application Page 8 <br />