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Culvert 180 <br />Time of Concentration (SCS) <br />Curve Number: 62 <br />Length of Flow: 2152.51 ft <br />Average Land Slope: 5.00 % <br />Time of Concentration: 0.720 hrs, 43.2 mins <br />Graphical Peak Discharge <br />Project: New Horizon Mine By: JSS <br />Location: C180 Checked: <br />Present <br />1. Data: <br />Wed Jun 08 14:56:17 2016 <br />Date: 06/08/16 <br />Date: <br />Drainage area: .................... A = 75.5755Acres <br />Runoff Curve Number: ............. CN = 62 <br />Time of Concentration: ........... Tc = 0.72 <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 = 10 <br />3. Rainfall,P(24-hour).............. in = 2.00 <br />4. Initial abstraction, Ia............ = 1.2258 <br />5. Compute Ia/P....................... = 0.6129 <br />6. Unit peak discharge, qu...... csm/in = 190.99 <br />7. Runoff,Q.........................in = 0.0868 <br />8. Pond & swap adjustment factor .... Fp = 1.00 <br />9. Peak Discharge,gp...............cfs = 1.9582 <br />The watershed area for this culvert has received Phase II bond release. This 8" PVC pipe has <br />been installed by the landowner to cross Krill Draw. This culvert has been installed for the <br />personal use of the landowner and is not designed to be part of the mining and reclamation plan. <br />Attachment 2.05.3(3)-1 Page 74 June 2016 (TR -73) <br />