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2010 Annual Report <br />Front Range Aggregates, LLC <br />Parkdale Project <br />Permit # M-1997-054 <br />Mining Activity <br />In March of 2008, Front Range Aggregates (FRA) amended the Parkdale permit. The <br />primary modifications to the permit included an addition of 10 acres to the western <br />boundary of the old permit and the ability to mine to below the water table to bedrock. <br />Since that time, mining has proceeded above the water table to extend the mine to the <br />new western mining limits. The activity illustrated on the enclosed map represents <br />----mining-ab-ove-the water table. -Once-the-aggregate west of!he plant and -a6ove the` <br />water table has been exhausted, mining below the water table will commence. This is <br />anticipated to begin in 2 to 4 years. <br />Mined volumes are considerably less than the mine is permitted to produce due to <br />dramatic reduction in market demand. Hours and man power have been reduced to <br />accommodate these new market dynamics. <br />Ground Water <br />Since this mine produces washed products, some ground water is exposed on the mine <br />floor in the fresh water and settling ponds. In addition, annual precipitation in the area <br />can cause significant changes in the level of ground water. When necessary, water is <br />discharged to comply with the Substitute Water Supply Plan for this mine. Once mining <br />below the water table begins as described above, dewatering will be more constant. <br />Overburden and Top Soil Stockpiles <br />Overburden has been used to create perimeter safety berms on the expanded western <br />mining limit. Excess overburden is now being stockpiled in the disturbance area west of <br />the mine. In 2011, overburden stockpiling will occur in the northwest corner of the <br />disturbance area. Additional top soil stockpiles have been created in the western and <br />southern disturbance areas as noted on the enclosed map.