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SEDIMENT VOLUME - Pond K <br />A=RKLSCP <br />D <br />0.600 <br />R = rainfall factor <br />WIDTH <br />30.00 <br />K = soil erodibility factor - Work soil <br />FEET <br />0.37 <br />LS = combined length slope factor 1200'- 4% <br />0.020 <br />1.00 <br />C = cropping management factor <br />N <br />1.00 <br />P = erosion control practice factor <br />SIDE SLOPE <br />1.00 <br />A = sediment, tons/acre/year <br />SLOPE = X:1 <br />11.10 <br />THREE YEAR SEDIMENT VOLUME - ACRE FEET <br />0.101 <br />7.56 ACRES-115#/CF <br />TOTAL REQUIRED SEDIMENT POND CAPACITY — AF <br />0.486 <br />10 -YR <br />25 -YR <br />24 HR <br />24 HR <br />Event <br />Event <br />Pond K Drainage 4.47 <br />5.92 <br />Flow calculations for the site ditches and culverts are presented in following sections of this exhibit. <br />Pond K Emergency Spillway <br />Manning's Equation <br />Flow In a Trapezoidal Channel <br />DEPTH <br />D <br />0.600 <br />FEET <br />WIDTH <br />W <br />2.000 <br />FEET <br />Slope <br />S <br />0.020 <br />EXPRESS AS DECIMAL <br />Mannings "N" <br />N <br />0.030 <br />EXPRESS AS DECIMAL <br />SIDE SLOPE <br />X <br />2.000 <br />SLOPE = X:1 <br />AREA=(W'D)+(X'DA2)= <br />WETTED PERIMETER=(W)+2`[((X`D)A2+1)A2)A0.5] <br />R=AREAfWETTED PERIMETER <br />V=(1.49/N)-(RA.667)`(SA.5)= <br />Q=AXV= <br />Q REQUIRED - Peak Discharge <br />Riprap Sizing - Across top of Embankment - Pond K <br />D50 = Size of Riprap <br />D50 = ((V X SA. 17)/7.58))^2 <br />D50 = Diameter in feet <br />V = Velocity <br />S = Slope <br />D50 = 0.07 feet <br />0.8 inches <br />1.92 FEET A2 <br />4.68 FEET <br />0.41 <br />3.88 FT/SEC <br />7.44 CFS <br />5.92 CFS <br />None Required <br />TR -084 EXH. 8-164 11/13 <br />