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• CULVERTA-5 BASIN 8 <br />Time of Concentration (SCS Method) 08/07/1999 <br />Curve Number: 87 <br />Length of Flow (ft): 832.77 <br />Average Land Slope (): 7.9 <br />Time of Concentration (hrs): 0.13 <br />08/07/1999 <br />Graphical Peak Discharge <br />Project: AMENDMENT By: GL Date: 08/07/99 <br />Location: CULVERT A-5 Checked: Date: <br />Developed <br />1. Data: <br />Drainage area :............ <br />Runoff Curve Number: <br />Time of Concentration <br />Pond and swamp area <br />2. Frequency .................. <br />........A = 14.5000 Acres <br />.............CN = 87 <br />...........Tc = 0.13 <br />s spread throughout watershed = 5.00 percent of A <br />0.7250 Acres <br />......yr = 10 <br />3. Rainfall,P(24-hour) ..............in = 2.00 <br />4. Initial abstraction, la............ = 0.2989 <br />5. Compute la/P ....................... = 0.1494 <br />6. Unit peak discharge, qu......csm/in = 907.26 <br />7. Runoff,Q .........................in = 0.9056 <br />8. Pond & swap adjustment factor,...Fp = 0.75 <br />9. Peak Discharge,gp ...............cfs = 13.9618 <br />(REVISED 12/00) <br />Attachment 2.05.3(3)-1- 28 <br />