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drainage pathways maintained and transitioned throughout the site as mining progresses. In <br /> addition to controlling stormwater from the bench above in reclamation, the berm will serve to <br /> catch rock material from above as well as provide safety control for heavy mining equipment <br /> completing reclamation. Therefore, each benches' stormwater and safety berm will be <br /> constructed to a LOH:1.OV slope to half wheel height of the largest piece of equipment on site as <br /> per MSHA regulations. Figure 3 and Figure 4 shows these berms along the mining benches. <br /> 6.4.4(d) <br /> Blasting and mining will occur in 25-foot lifts, —50-foot-wide, along 500-foot lateral extents. <br /> The final blasts along the mining extent will be excavated and promptly backfilled to create a <br /> 2.01-1:1.OV slope. Therefore, the maximum active highwall during mining will be 25 feet tall and <br /> —500 feet long (Figure 3). See Rule 6.5 —Geotechnical Stability Exhibit. Once a bench is <br /> reclaimed, it is no longer considered a highwall. Therefore, as mine maps include `tall' post- <br /> mined slopes, they are graded and reclaimed to 2.OH:1.OV and thus not considered a highwall. <br /> The elevation of each bench will dictate its lateral extents with higher elevation benches being <br /> smaller than lower elevation benches. In higher elevation initial mining areas, an entire bench <br /> may be mined at once while lower elevation benches may be mined in stages. Following higher <br /> elevation mining, lower elevation mining areas (which are inherently larger within a phase) will <br /> be developed in approximately 20-acre portions. Where possible, the overlying gravel will be <br /> mined by front-end loader into trucks for transport to the onsite crusher and screening plant. <br /> 6.4.4(e) <br /> Mining will be completed based on market conditions over five phases. Mining will begin with <br /> initial opening and the creation of the site processing area as Phase 1, followed by mining Phases <br /> 2-5. Phases may be mined out of numerical order. Exhibit C maps detail the mine plan by <br /> projected phase and F-1 features the Reclamation plan. <br /> The mining schedule is planned to minimize disturbance by reclaiming mined-out areas as new <br /> mining phases become active. Note: if large contracts are awarded to the site, production could <br /> increase and reduce the life of the quarry. Conversely, if contracts are less than anticipated, the <br /> life of the quarry could be extended. <br /> Young Ranch Resource <br /> December 2021 D-I 1 Lewicki & Associates <br />