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Raw gravel material is loaded into a portable crusher/screen plant where various sizes of product <br /> will be created and sorted into separate size-dependent stockpiles. Maximum processing is <br /> approximately 3,000 tons per day. The crushing operation and processed stockpile locations <br /> may change during the mine's life as mining proceeds across the mining area. Stockpiles include <br /> gravel reserves for the Southway Construction Company as well as Alamosa County. <br /> Normal groundwater levels are known to be greater than 100 feet below the current pit floor. No <br /> water will be encountered in the operation. However, in the unlikely event that water is <br /> encountered during mining, excavation will immediately stop and the area will be backfilled with <br /> at least 2 feet of overburden to cover the exposed water. No pit dewatering will take place, as the <br /> groundwater table is below the bottom of the pit elevation shown on Maps C-1 and C-2. <br /> Mining activities are expected to occur approximately 6 to 8 months per year and processing <br /> operations will occur concurrently and include screening and crushing of gravel. Mining of the <br /> deposit will occur to the limits shown on Map C-2. Expected annual average production is <br /> 100,000 tons. Actual production rates will fluctuate based on market conditions. Raw material <br /> will be processed and sold as various products: crushed rock, chips, road base, concrete, and <br /> asphalt. "Naturals" or sandy fines from the screening operation will be mixed into overburden <br /> and are expected to make up approximately 10% of the raw material mined. <br /> Used asphalt pavement and concrete rubble is also imported and stockpiled on site to be used for <br /> future crushing and stockpiling for use as a recycled material in new construction. Additionally, <br /> imported concrete and asphalt may be used in the base layers of backfilling and will be <br /> thoroughly covered with overburden and topsoil as per the reclamation plan. Occasionally, soil <br /> that is determined to be free of debris and is certified inert is brought to the site and stockpiled <br /> for use during reclamation. Stockpiles of road base material and crushed rock used by Alamosa <br /> County are stored in piles in the southern mined extent of the site. <br /> Topsoil and overburden from newly disturbed areas will be used to reclaim mined out areas; <br /> therefore, total site disturbance will be minimized as reclamation will occur concurrent with <br /> mining. This will reduce material moving as well as reduce the maximum area to be reclaimed. <br /> The maximum disturbance is discussed in Exhibit L. The expected mining life is discussed <br /> below. <br /> King Pit <br /> February 2018 D-2 <br />