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<br />DIVERSION DITCH D-1 BASIN 18 <br />Time of Concentration (SCS Method) <br />Curve Number: 79 <br />Length of Flow (ft): 1380 <br />Average Land Slope Q: 1.9 <br />Time of Concentration (hrs):.0.51 <br />08/07/1999 <br /> <br />• <br />Graphical Peak Discharge <br />Project: AMENDMENT By: GL <br />Location: DIVERSION D-1 Checked <br />Developed <br />1. Data: <br />Drainage area :....................A = 10.3000 Acres <br />Runoff Curve Number :.............CN = 79 <br />Time of Concentration:...........Tc = 0.51 <br />08/07/1999 <br />Date: 08/07/99 <br />Date: <br />Pond and swamp areas spread throughout watershed = 5.00 percent of A <br />0.5150 Acres <br />2. Frequency ........................yr = 10 <br />3. Rainfall,P(24-hour) ......... .....in = 2.00 <br />4. Initial abstraction, la....... ..... = 0.5316 <br />5. Compute la/P ................. ...... = 0.2658 <br />6. Unit peak discharge, qu. .....csm/in = 455.12 <br />7. Runoff,O ........................ .in = 0.5225 <br />8. Pond & swap adjustment factor,...Fp = 0.72 <br />9. Peak Discharge,gp ........ .......cfs = 2.7554 <br />(REVISED 12/00) <br />Attachment 2.05.3(3) -10-105 <br />