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6.4.4(b) <br /> Earthmoving consists of topsoil and overburden handling, rhyolite mining and processing and <br /> will be performed in a variety of ways using multiple types of equipment. Recovered topsoil and <br /> overburden will be stored in site perimeter stormwater berms and within temporary stockpiles <br /> within the processing area. Any topsoil or overburden berm and any soils stockpiles will be <br /> seeded within 90 days of establishment (180 days if berms are built outside the growing season) <br /> with a reclamation rangeland seed mix or quick oats to prevent erosion. Stockpiles and berms <br /> will be constructed to 2.0H:1.0V slopes. Overburden stockpiles will not exceed 9 feet in height. <br /> Portable mining equipment such as loaders, dozers, trucks and excavators will be serviced on an <br /> as-needed basis. Upon reclamation, all portable equipment will be removed from the site. The <br /> following list is the best estimate of equipment and vehicles that will be used onsite throughout <br /> the mine life: <br /> 1 front end loader <br /> 1 bulldozer <br /> 1 4000-gallon water truck <br /> - Haul (dump)trucks (number will depend upon production needs) <br /> - 15- and 24-ton on-road haul trucks (number will depend upon production needs) <br /> A summary of fixed and portable installations that may exist on site at any given time is listed <br /> below. <br /> - Portable truck scales <br /> - Portable office trailer <br /> - Equipment parking and maintenance area <br /> - Overflow resource stockpiling area <br /> - Portable crusher and screening plant (may include washing) <br /> - Portable conveyors <br /> - Portable 10,000-gallon diesel fuel tank in secondary containment(110%of tank capacity) <br /> - Portable lights with a generator for emergency after hours maintenance support <br /> Siskin Pit <br /> January 2024 D-4 1111 Le%icki &Associates <br />