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Roughly 200,000 tons of material is planned to be mined per year. The raw material will be sold <br /> as various products: crushed rock, chips, road base, concrete, and asphalt. A breakdown of the <br /> mined tonnages can be seen in Table D-1.A breakdown of the estimated areas is included in Table <br /> D-2. Both topsoil and overburden may be sold onsite on an as needed basis, however Graff <br /> commits to keeping enough material onsite to be able to reclaim the site. The amounts of topsoil <br /> and overburden sold are incidental commodities and are not therefore included in the table below <br /> or the annual tonnage sold from the site. <br /> Each pit serves as a sediment pond for the operations that take place in it. Pit dewatering will be <br /> conducted using a pump located at least two feet below the operating floor, in order to intercept <br /> water before it can pick up sediment from the pit. A gravel berm around the pump will also help <br /> ensure that the discharge from pit dewatering is clean. The West Pit will then pump to a discharge <br /> point on the west end of the property that drains to the Gunnison River.The East Pit will be pumped <br /> into the West Pit,as the West Pit will become a lake once it is mined out. This will allow the entire <br /> operation to use the same NPDES discharge points on the west side throughout the life of the <br /> operation. Further details may be found in Exhibit G. <br /> Clean water from dewatering will be used during mining in order to water trees and other <br /> vegetation around the pits that would otherwise be negatively affected by the lowered water table. <br /> The wash plant which will be used onsite will consist of a system to handle sediment from the <br /> washing operation. This system will consist of two settling ponds. Water will be pumped from the <br /> ponds to the plant. Removal of settled material will be conducted as necessary and the settled <br /> material will be dried and used for fill where necessary or placed on the bottom of the pit. <br /> Mining will progress through the areas numerically. The topsoil and overburden from a new area <br /> will be used to reclaim the previous are. This will reduce material moving as well as reduce the <br /> maximum area to be reclaimed. Any fines from the crushing/screening operation and removed <br /> from the settling pond will also be salvaged and used in the reclamation. A table of expected <br /> mining lives for each Pit is included in Table D-1. The life of each pit is based on the anticipated <br /> annual average tonnage. <br /> No explosives will be used in conjunction with the mining and reclamation operation. <br /> BRS&G Pit I Y (1-I ewa Ai .", \s,ncidlr,,-I <br /> March 2019 D-3 <br />