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mine plan will be updated through the Technical Revision process. Since the Miner forsees <br /> this as a possibility, the slope stability analysis was conducted at the worst case scenario of a <br /> 1.5 to 1 mine slope. <br /> (c) All water diversions and impoundments; <br /> Storm water will be discharged per a CDPHE discharge permit. There are no planned <br /> diversions or impoundments of existing water bodies. A wash cycle for the aggregate <br /> processing area will be established using the freshwater pond as a source and the silt pond for <br /> return flow,with natural groundwater filtration between the source pond and the return pond. <br /> Any water consumed will be provided by the existing water rights associated with the property <br /> and/or a groundwater well with associated substitute water supply plan (see Exhibit G). <br /> (d) The size of area(s) to be worked at any one time. <br /> Each phase is approximately 25-30 acres in size. The Operator will mine multiple phases <br /> concurrently in order to obtain a range of material for production. In addition to mining,the <br /> Operator,will begin reclaiming slopes as mining is finished in each stage. Since multiple <br /> phases will be being worked at any one time,the approximate size of the areas to be worked <br /> at any one time will range from 25 acres to 120 acres and will depend on market conditions. <br /> (e) An approximate timetable to describe the mining operation. The timetable is for the <br /> purpose of establishing the relationship between mining and reclamation during the <br /> different phases of a mining operation. <br /> The Operator anticipates that mining will commence as soon as all permits are in place. The <br /> Operator anticipates extracting approximately 2,000,000 tons of aggregate in a typical year, up <br /> to 3,000,000 tons at peak capacity. Production rate will vary based on market demands. <br /> Section 20—Gravel Mine—MLRB 112 Permit Amendment <br /> Exhibit D-4 <br />