Laserfiche WebLink
SEDCAD+ RIPRAP CHANNEL DESIGN <br /> <br />PROSPECT POND EMERGENCY SPILLWAY <br />INPUT VALUES: <br />Shape TRAPEZOIDAL <br />Discharge 27.56 cfs <br />Slope 33.00 ~ <br />Sideslopes (L and R) 2.50:1 2.50:1 <br />Bottom Width 12.00 feet <br />RESULTS: <br />Steep Slope Design <br />~r <br />Notes• <br />1. This <br />reasons: <br />a. <br />b. <br />c. <br /> <br />Depth <br />Top Width <br />Velocity <br />Hydraulic Radius <br />Manning's n <br />Froude Number <br />D50 <br />Dmax <br />D10 <br />0.07 feet <br />12.37 feet <br />3.88 fps <br />0.07 feet <br />0.038 <br />2.55 <br />1.00 feet <br />1.25 feet (15.00 inches) <br />0.33 feet ( 4.00 inches) <br />riprap design is conservative due to the following <br />Peak discharge of 27.56 cfs will be passed through both <br />the principal spillway and the emergency spillway. <br />Maximum slope of 33$ only occurs on backside of dam and <br />not throughout the entire length of the spillway. <br />Actual bottom width to be constructed will be 15 feet. <br />2. Riprap not required for pond inlet due to non-erosive water <br />velocity. <br />3. All riprap and underlying filter rock will consist of angular, <br />broken rock. <br />4. Minimum riprap thickness will be 15 inches. <br />5. Underlying filter rock thickness will be a minimum of 7.5 <br />inches of 4 inch or smaller rock. <br />6. Actual as-built riprap parameters may exceed this minimum <br />design. <br />