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Trapezoidal Riprap Channel <br />Steep Slope Design - PADER Method <br />Design Bottom Manning's <br />Discharge Width ZLeft ZRight Slope n <br />(cfs) (ft) (~) <br />------------------------------------------------- <br />------------------------------------------------- <br />358.95 3.0 2.5:1 2.5:1 13.9 0.056 <br />Top Hydraulic Froude <br />Depth Velocity Width Radius Number <br />(ft) (fps} (ft) <br />----------------------------------------------- <br />----------------------------------------------- <br />2.76 13.16 16.8 1.528 1.82 <br />w/ Freeboard: 2.76 16.8 <br />----DMax---- ----D50---- ----D10---- <br />(ft) (in) (ft) (in) (ft) (in) <br />------------------------------------------ <br />1.56 18.75 1.25 15.00 0.42 5.00 <br />Runoff Peak <br />Volume Discharge <br />(ac-ft) (cfs) <br />----------------------------- <br />----------------------------- <br />IN/OUT 64.65 358.95 <br />J4, B1, 54 <br />REACH A - N4FN <br />Drainage Area from J4, B1, S4, SWS(s)1: 18.0 acres <br />Total Contributing Drainage Area: 499.9 acres <br />MATERIAL: Rock Riprap <br />Trapezoidal Riprap Channel <br />Steep Slope Design - PADER Method <br />Design Bottom Manning's <br />Discharge Width ZLeft ZRight Slope n <br />(cfs) (ft) (~) <br />-------------------------------------------- -- <br />389.99 3.0 2.5:1 2.5:1 12.5 0.055 <br />Top Hydraulic Froude <br />Depth Velocity Width Radius Number <br />(ft) (fps) (ft) <br />----------------------------------------------- <br />2.90 13.09 17.5 1.598 1.77 <br />w/ Freeboard: 2.90 17.5 <br />----DMax---- ---- <br />(ft) (in) (ft} <br />------------------- <br />1.56 18.75 1.25 <br />Runoff <br />Volume <br />(ac-f t) <br />D50---- ----D10---- <br />(in) (ftj (in) <br />-------- -- -- <br />15.00 0.42 5.00 <br />Peak <br />Discharge <br />(cfs) <br />