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iii i~~~i-~titiiiiii~~ <br />SENECA II WEST MINE <br />POND 006 PHASE IV SUMMARY <br />Run-off Volume (10-year, 24-hour) 22.32 ac-ft <br />Peak Discharge (25-year, 24-hour) 165.9 cfs <br />Sediment Volume (1 year) 6.21 ac-ft <br />Outlet Works <br />Principal Spillway: 24" CMP Riser with 24" culvert <br />Top of Riser 7071.5 ft <br />Base of Riser 7065.2 ft <br />Emergency Spillway: Trapezoidal Channel <br />Bottom Width 15 ft <br />Side Slopes 3H:1 V <br />Invert 7075.5 <br />Peak Water Elevations <br />] 0-year, 24-hour 7075.4 ft <br />25-year, 24-hour 7077.9 ft <br />Top of Embankment 7080.0 ft <br />Freeboard 2.1 ft <br />Sediment Storage (1.5 ft below principal spillway invert) 8.70 ac-ft <br />Years Storage 1.4 years <br />Peak Settleable Concentration (10-year, 24-hour) 0.02 mUl <br />