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• <br />• <br />• <br />ONE YEAR SEDIMENT VOLUME -ACRE FEET 0.421 <br />311.87 ACRES - 115 #JCF <br />TOTAL REQUIRED SEDIMENT POND CAPACITY -- AF 3.66 <br />Pond C Emergency Spillway <br />Manning's Equation <br />Flow In a Trapezoidal Channel <br />DEPTH D 0.70 <br />WIDTH W 10.0 <br />Slope S 0.02 <br />Mannings 'TI" N 0.03 <br />SIDE SLOPE X 2.0 <br />AREA=(WD)+(X*D^2)= <br />WETTED PERIMETER=~+2*[((X•D)^2+ D^2)^0.5] <br />R=AREA/WETTED PERIMETER <br />V=(1.49/N)•(R^.667)*(S^.5)= <br />Q=AXV= <br />Q REQUIRED -Peak Dischazge <br />Riprap Sizing -Across top of Embankment -Pond C <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 = 0.12-Feet 1.4-inches None Required <br />PR-03 EXH-8 -11 - <br />FEET <br />FEET <br />EXPRESS AS DECIMAL <br />EXPRESS AS DECIMAL <br />SLOPE = X:1 <br />7.98 FEET^2 <br />13.13 FEET <br />0.61 <br />5.04 FT/SEC <br />40.22 CFS <br />39.96 CFS <br />5/99 <br />