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Culvert 135 <br />Time of Concentration (SCS) <br />Curve Number: 73 <br />Length of Flow: 2747.79 ft <br />Average Land Slope: 3.45 % <br />Time of Concentration: 0.787 hrs, 47.2 mins <br />Graphical Peak Discharge Tue Mar 15 10:46:47 2016 <br />Project: New Horizon Mine By: JSS Date: 03/15/16 <br />Location: C135 Checked: Date: <br />1. Data: <br />Drainage area: .................... A = 74.9279Acres <br />Runoff Curve Number: ............. CN = 73 <br />Time of Concentration: ........... Tc = 0.79 <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............ = 0.7397 <br />5. Compute Ia/P....................... = 0.3699 <br />6. Unit peak discharge, qu...... csm/in = 287.32 <br />7. Runoff,Q.........................in = 0.3203 <br />8. Pond & swap adjustment factor .... Fp = 1.00 <br />9. Peak Discharge,gp...............cfs = 10.7739 <br />The watershed area for this culvert has received Phase II bond release. This 18" HDPE pipe has <br />been installed by the landowner to cross an inlet ditch into Pond 007. This culvert has been <br />installed for the personal use of the landowner and is not designed to be part of the mining and <br />reclamation plan. <br />Attachment 2.05.3(3)-1 Page 46 June 2016 (TR -73) <br />