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Time of Concentration (SCS Method) <br />Cutve Number: 87 <br />Length of Flow (ft}: 1554 <br />Average Land Slope Q: 5.00 <br />Time of Concentration (hrs): 0.2? <br />Graphical Peak Discharge <br />Project: Cugnini Pit By: Ben Miller Date: 05/21/03 <br />1. <br />Drainage azea :..................:.A = 1285766.8524 Sq Ft <br />Runoff Curve Number :.............CN = 87 <br />Time of Concentration:...........Tc = 0.27 <br />Pond and swamp azeas spread <br />throughout watershed ............... =10.00 percent of A <br />128576.6852 Sq Ft <br />2. Frequency ........................yr = 100 <br />3. Rainfall,P(24-hour) ..............in = 3.20 <br />4. Initial abstraction, Ia............ = 0.2989 <br />5. Compute Ia/P ....................... = 0.0934 <br />6. Unit peak discharge, qu......csm/in = 713.41 <br />7. Runoff,Q .........................in = 1.9149 <br />8. Pond & swap adjustment factor,...Fp = I.00 <br />9, Peak Dischazge,gp ...............cfs = 63.0049 <br />Vegetated Channel Design <br />Project: Cugnini Gravel pit By: Ben Miller Date: 06/30!03 <br />Channel Type: Trapezoidal, Equal Side Slopes <br />1. Channel Geometric Properties <br />Dimensions : Left Side Slope ................................... = 5.00:1 <br />Right Side Slope .................................. = 5.00:1 <br />Base Dimension ...................................: 22.29 <br />2. Design Parameters <br />Mannings coefficient,n ..........................................: 0.025 <br />Bed Slope,s (°!o} .................................................: 2.000 <br />3. Design details <br />Discharge .......................................................: b3.00 cfs <br />Depth of Flow ...................................................: 0.51 feet <br />Velocity ........................................................: 5.00 fps <br />Channel Lining ..................................................: Mixed Grasses <br />FTPP11hAY(I n lIO ~PP} <br />Grouted Rip Rap Channel Design <br />Project: Cugnini Gravel pit By: Ben Miller Date: 06!30/03 <br />Channel Type: Triangular, Equal Side Slopes <br />Cue ini 12103 ~ S <br />