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DEWATERING DATA (Meadows West only) <br />Description <br />Amount <br />Units <br />Area 100% of lake depth <br />25.02 <br />acres <br />maximum depth <br />25 <br />feet <br />length of W:1 slopes <br />4,500 <br />feet <br />Unit volume of water on %:1 slopes <br />156.25 <br />cft/Lft <br />Gallon conversion factor <br />7.48 <br />gal/cft <br />Transmissivity # <br />72,300 <br />gal/day <br />Pump rate minimum <br />6,000 <br />gpm <br />CALCULATED VOLUMES AND TIMES <br />Slope water volumes <br />% :1 slope capacity <br />5,259,275 <br />gal <br />100% depth <br />204,217,088 <br />gal <br />Total pumping volume <br />209,476,363 <br />gal <br />Pumping time <br />Dewater lake <br />24.24 <br />Days <br />Slope construction time <br />12.05 <br />Days <br />Recharge factor for inflow during sloping <br />time and Dewatering <br />0.30 <br />Days <br />TOTAL PUMPING TIME* <br />37.00 <br />Days <br />CALCULATION FACTORS <br />Explanation <br />Quantity <br />Units <br />Soil depth <br />8.00 <br />Inches <br />Lake bank sloping construction <br />41.68 <br />cy/Lft <br />Slurry wall installation cost <br />$3.00 <br />sq -ft <br />Slurry wall bond factor <br />20% <br />Bank slope construction time <br />267 <br />days <br />Weed control costs <br />$5.000.00 <br />Per year <br />EXHIBIT L <br />L.G. Everist, Inc. - Fort Lupton Sand and Gravel <br />TABLE Li <br />TABLE L2 <br />*NOTE: pumping time rounded to next full day <br />2 <br />RECLAMATION COSTS (cont) (revised 10122112) <br />M- 1999 -120 <br />