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media as well as slope backfill material during reclamation. <br />Overburden will be stripped prior to the commencement of mining in a particulaz mining area. <br />It should be noted that Phase 1 has no overburden. However, there will be an abundance of <br />overburden in Phases 4 & 5. Overburden will be used as backfill for the lake slopes. Details <br />of topsoil and overburden stripping are shown in the Mine Area table. <br />Mine Plan <br />Prior to mining, the pit will need to be dewatered. This will be accomplished by installing a <br />perimeter dewatering trench. The trenches will lead to a sump as shown in Map C-2. Water <br />will be allowed to pass through a gravel berm prior to entering the sump. This will act to filter <br />out a portion of the sediment. All discharge will pass through a sediment control pond in order <br />to allow sediment to settle. The sediment control pond will be monitored for build up. If a <br />substantial amount of sediment has accumulated, the pond will be cleaned. The sediment <br />cleaned from the pond will be placed as fill in the area currently being mined. <br />An existing depression onsite will be used as a settling pond, This depression was created by <br />the landowner many years ago as a stock watering pond. Due to the extremely porous nature <br />of the native gravel, the discharge water is expected to seep into the river rather than <br />discharge. However arip-rap lined spillway will be installed in the existing pond. <br />As mining progresses through the phases, the pumping arrangement will continually change. <br />The locations of the pumps and ditches are approximate as shown on the mine plan map. It is <br />expected that dewatering of a pit will require approximately 1000 gallons per minute pumping <br />capacity. During initial dewatering, the pumping demand maybe up to three times the stable <br />pumping rate or 3000 gallons per minute. <br />Once the pit has been dewatered, mining will begin. Primarily, front-end loaders will be used <br />to mine the raw gravel. The slopes of the pit will be mined to 3H:1 V slopes. While mining in <br />the center of the pits a much steeper highwall will be maintained. This highwall will be laid <br />back as it approaches the mining limits. Some dozer pushing or ripping may also be used. The <br />loader will directly load to a primary crusher or into trucks which will deliver the material to <br />the crusher. The road alignments shown on Map C-2 and F aze the approximate final location. <br />Current roads as seen in Map C-1 will be utilized until realignment is necessary. <br />If any "reportable quantity" of hazardous material or waste is released into the environment, <br />the operator will notify staff of the Colorado Division of Minerals and Geology as well as all <br />other appropriate local, state and federal agencies. This is more completely described by an <br />excerpt from the February 8, 2002 DMG memorandum regarding Minerals Program <br />Notification of Toxic or Hazazdous Materials Spills at Mine Sites." <br />"A reportable spill is a spill of any toxic or hazardous substance (including spills of petroleum <br />products) within the permit area reportable to any Division of the Colorado Department of <br />11/7/2005 Page D-4 <br />