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scrapers, and excavators. The aggregate material from the pit will be temporarily stockpiled <br /> within the pit or transported directly to the processing facility. During mining and reclamation <br /> 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 25 feet or greater. Setbacks from near vertical mining <br /> excavations to the permit boundary will be a minimum of twice the adjacent pit depth, but never <br /> less than 25 feet, to mitigate stability risks. <br /> Topsoil and overburden material excavated from the pit will be stockpiled separately and used <br /> for 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. When sufficient material <br /> is available in the stockpile, the material will be backfilled into previously 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 15,000 feet of pit side slopes will be created during <br /> mining. Since reclamation is anticipated to be concurrent with mining operations, the actual <br /> length of side slope requiring backfilling and grading at any point in time is expected to be far <br /> less than 15,000 feet. Since the pit depth is estimated to be about 10 feet, the typical side slope is <br /> expected to be 10 feet high. Once backfilling and final grading has been completed in an area, <br /> the top of the slope and the side slopes will be seeded as soon as practicable (based on first <br /> 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 /> will likely be disturbed on a frequent basis and seeding the stockpiles may not be practical during <br /> the course of the operation. If stockpile seeding is not used, surface roughening will be <br /> maintained to limit wind and water erosion. <br /> Stockpile Grass Seed Mixture <br /> Grass Species Rate <br /> (lbs PLS/acre) <br /> Intermediate Wheatgrass 5.0 <br /> Blue Grama 1.0 <br /> Triticale (sterile hybrid of wheat and rye) 1.25 <br /> Rates are for broadcast seeding. <br /> In order to gain an understanding of the extent of the mining operation, it is helpful to know the <br /> acres disturbed by different aspects of the mining operation. Each aspect is listed in the <br /> following table with associated disturbed area. The table illustrates a point in time where the <br /> Lary Two Pit <br /> DRMS 112 Permit Application Page 7 <br />