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• <br />Spillway Pond B <br />Pond B Emergency Spillway <br />Manning's Equation <br />Flow In a Trapezoidal Channel <br />DEPTH D 0.50 FEET <br />WIDTH W 10.0 FEET <br />Slope S 0.02 EXPRESS AS DECIMAL <br />Mannings "N" N 0.03 EXPRESS AS DECIMAL <br />SIDE SLOPE X 2.0 SLOPE = X:1 <br />• <br />• <br />AREA=(W'D)+(X'D2)= <br />WETTED PERIMETER=(VV)+2*I((}C•D)=+DZ)'~j <br />R=AREAIWETI'ED PERIMETER <br />Q=AXV= <br />Q REQUIRED -Peak Discharge <br />Sediment Pond B <br />Riprap Sizing -Across top of Embankment <br />D50 =Size of Riprap <br />D50 = ((V X S^.17)/7.58))^2 <br />D50 =Diameter in feet <br />V =Velocity <br />_ S =Slope <br />D50 = 0.08 feet 0.94 inches None Required <br />PR-03 <br />EXH-8 -8 - <br />5.50 Feet <br />12.24 Feet <br />0.45 <br />4.12 FUSec <br />22.67 CFS <br />21.64 CFS <br />5/99 <br />