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• DITCH C-3 BASIN 23 <br />Time of Concentration (SCS Method) <br />Curve Number: 85 <br />Length of Flow (ft): 888.74 <br />Average Land Slope (): 4.5 <br />Time of Concentration (hrs): 0.19 <br />• <br />Graphical Peak Discharge <br />Project: AMENDMENT <br />Location: DITCH C-3 <br />Developed <br />1. Data: <br />Drainage area :................ <br />Runoff Curve Number <br />08/07/1999 <br />08/07/1999 <br />By: GL <br />Checked: <br />Date: 08/07/99 <br />Date: <br />.A = 1.8500 Acres <br />.....CN = 85 <br />Time of Concentration:...........Tc = 0.19 <br />Pond and swamp areas spread throughout watershed. = 5.00 percent of A <br />0.0925 Acres <br />2. Frequency ........................yr = 10 <br />3. Rainfall,P(24-hour) ..............in = 2.00 <br />4. Initial abstraction, la............ = 0.3529 <br />5. Compute la/P ....................... = 0.1765 <br />6. Unit peak discharge, qu......csm/in = 777.98 <br />7. Runoff,Q .........................in = 0.7951 <br />8. Pond & swap adjustment factor,...Fp = 0.80 <br />9. Peak Discharge,gp ...............cfs = 1.4305 <br />. (REVISED(4-30-02) Attachment 2.05.3(3)-1- 10 <br />