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area likely has only 10 years or less of gravel and sand reserves. <br /> ii. Approximately 123 acres will be disturbed during the amended mining operation.Approximately 20- <br /> 25 acres will be exposed at any one time. <br /> iii. The mining operation in the amendment area is not proposed to be phased. <br /> f) Please see exhibit C3. <br /> i. The estimated thickness of gravel-bearing zones varies from between 0 and 15 feet thick at the Koskie <br /> site. No high wall mining is anticipated. <br /> ii. The gravel deposits proposed to be mined are stream channel deposits associated with Lone Tree <br /> Creek, an ephemeral stream that is located approximately 'h mile to the east of the Koskie site. <br /> Therefore, the thickness of overburden to be removed during gravel extraction is expected to be <br /> minimal. Minimal stockpiling of overburden is anticipated. Mined soils unsuitable for construction <br /> use will be separated from the mined gravels and may be stockpiled at the site. These soil stockpiles <br /> will be utilized for excavation backfill and site reclamation. <br /> g) The primary commodities to be mined are gravel and sand.The gravel and sand extracted from the Koskie site <br /> will be utilized by Weld County Public Works Department for repair and maintenance of local County roads <br /> and other County construction projects.This is a County-operated gravel pit;no commercial gravel and sand <br /> sales are anticipated.No secondary commodities are anticipated to be extracted or produced at the Koskie site. <br /> h) Soils and mined materials unsuitable for road construction may be stockpiled at the site. These soil stockpiles <br /> may be utilized for excavation backfill and site reclamation on County-operated projects. <br /> i) No explosives will be used at the site. <br /> j) Weld County Road 120 extends east-west along the north edge of the Koskie site(see Exhibit C2). The gravel <br /> excavation and processing areas will be accessed from that county road.No improvements are anticipated to <br /> County Road 120 for this operation.One mining road is proposed and is shown on exhibit C3,included in the <br /> mining area. <br /> C\Users\hbalzano\Desktop\Koskie\Koskie Amendment Application Exhibits 04-29-20 doc <br /> 4/29/2020 <br />