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Culvert 175 <br />Time of Concentration (SCS) <br />Curve Number: 73 <br />Length of Flow: 560.70 fl <br />Average Land Slope: 4.13 % <br />Time of Concentration: 0.202 hrs, 12.1 mins <br />Graphical Peak Discharge <br />Project: New Horizon Mine By: JSS <br />Location: C175 Checked: <br />1. Data: <br />Tue Mar 15 16:41:27 2016 <br />Date: 03/15/16 <br />Date: <br />Drainage area: .................... A = 8.9069Acres <br />Runoff Curve Number: ............. CN = 73 <br />Time of Concentration: ........... Tc = 0.20 <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 = 622.19 <br />7. Runoff,Q.........................in = 0.3203 <br />8. Pond & swap adjustment factor .... Fp = 1.00 <br />9. Peak Discharge,gp...............cfs = 2.7734 <br />Culvert 176 <br />This 18" CMP conveys the flow from the Pond 018 East Ditch into Pond 018 beneath an <br />existing road. The design for this culvert is provided in the Pond 018 design located in <br />Attachment 2.05.3(3)-28. <br />Culvert 177 <br />This 18" HDPE pipe conveys the flow from Ditch C9 into Pond 013 and will provide a crossing <br />over Ditch C9. The design for this culvert is provided in the Pond 013 design located in <br />Attachment 2.05.3(3)-32. <br />Attachment 2.05.3(3)-1 Page 71 June 2016 (TR -73) <br />