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Culvert 156 <br />Time of Concentration (SCS) <br />Curve Number: 73 <br />Length of Flow: 1496.29 ft <br />Average Land Slope: 2.89 % <br />Time of Concentration: 0.528 hrs, 31.7 mins <br />Graphical Peak Discharge Tue Mar 15 14:27:54 2016 <br />Project: New Horizon Mine By: JSS Date: 03/15/16 <br />Location: C 156 Checked: Date: <br />1. Data: <br />Drainage area: .................... A = 21.0573Acres <br />Runoff Curve Number: ............. CN = 73 <br />Time of Concentration: ........... Tc = 0.53 <br />Storm Type: ....................... = II <br />Pond and swamp areas spread <br />throughout watershed ............... = 0.00 percent of A <br />0.0000 Acres <br />2. Frequency ........................yr = 25 <br />3. Rainfall,P(24-hour).............. in = 2.40 <br />4. Initial abstraction, Ia............ = 0.7397 <br />5. Compute Ia/P....................... = 0.3082 <br />6. Unit peak discharge, qu...... csm/in = 423.52 <br />7. Runoff,Q.........................in = 0.5144 <br />8. Pond & swap adjustment factor .... Fp = 1.00 <br />9. Peak Discharge,gp...............cfs = 7.1676 <br />Attachment 2.05.3(3)-1 Page 55 June 2016 (TR -73) <br />