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• DITCH C-5 BASIN 17 POND 010 SUBWATERSHEDS SW3 AND SW4 <br />Time of Concentration (SCS Method) 08/07/1999 <br />Curve Number: 85 <br />Length of Flow (ft): 3679.09 <br />Average Land Slope (): 4.78 <br />Time of Concentration (hrs): 0.58 <br />08/07/1999 <br />• <br />Graphical Peak Discharge <br />Project: AMENDMENT By: GL Date: 08/07/99 <br />Location: DITCH C-5 Checked: Date: <br />Developed <br />1. Data: <br />Drainage area :....................A = 168.1000 Acres <br />Runoff Curve Number :.............CN = 85 <br />Time of Concentration:...........Tc = 0.58 <br />Pond and swamp areas spread throughout watershed = 5.00 percent of A <br /> 8.4050 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 = 458.81 <br />7. Runoff,Q .................... .....in = 0.7951 <br />8. Pond & swap adjustm ent factor,...Fp = 0.72 <br />9. Peak Discharge,gp .... ...........cfs = 68.9903 <br />• (REVISED(4-30-02) Attachment 2.05.3(3)-1- 12 <br />