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OXBOW MINING, LLC. ELK CREEK MINE <br /> POND D SUMMARY <br /> Runoff <br /> Runoff Volume (10-year, 24-hour) 1.70 ac-ft <br /> Active Pond Storage 0.57 ac-ft <br /> Sediment <br /> 3 Year Sediment Yield 0.49 ac-ft <br /> Pond Sediment Storage 0.49 ac-ft <br /> Sediment Storage Elevation 6,163.59 ft. <br /> Primary Spillway <br /> Type 12 inch cmp riser with 12 inch barrel <br /> Invert Elevation 6,167.5 ft. <br /> Emergency Spillway <br /> Type 12 inch cmp. <br /> Invert Elevation 6,169.5 ft. <br /> Peak Discharge <br /> Peak Discharge In (10-year, 24-hour) 28.3 cfs <br /> Peak Discharge Out (10-year, 24-hour) 5.2 cfs <br /> Peak Elevation 6,169.37 ft. <br /> Peak Settleable Conc. 0.01 ml/I <br /> Peak Discharge In (25-year, 24-hour) 40.4 cfs <br /> Peak Discharge Out (25-year, 24-hour) 7.44 cfs <br /> Peak Elevation 6,170.19 ft. <br /> Top of Embankment 6,171.30 ft. <br /> Freeboard 1.11 ft. <br /> Inlet Channel <br /> Peak Flow (Q) 28.29 cfs <br /> Bottom Width 10.0 ft. <br /> Side Slopes H:V 3:1 <br /> Slope 33% <br /> RipRap D50 12 in. <br /> RN-06 September 2013 <br /> CO' <br />