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Project:Lyons Quarry BS Date: 227/2016 <br /> Subject-Scour Analysis Date: <br /> Task:Launching Toe Geometry <br /> Job#: No: <br /> Analysis based on guidance in Hydraulic Design of Flood Control Channel EM1110-2-1601,by the U.S.Army Corps of Engineers,1994 and <br /> Riprap Thickness(ft) 3.5 <br /> Scour Depth(ft) 21 <br /> Launching Slope(horizontal/vertical) 2 <br /> Computed Slope Length(ft) 47 <br /> Computed Volume of Riprap(ft') 164 <br /> Riprap Launching Increase Factor 2 <br /> Increased Launch Volume of Riprap(ft3) 247 <br /> Launching Toe Ratio to Riprap Thickness 2.5 <br /> Thickness of Luanchmg Toe(ft) 9 <br /> Length of Launching Toe(ft) 29 <br /> d <br />