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Culvert 179 <br /> Time of Concentration(SCS) <br /> Curve Number: 62 <br /> Length of Flow: 1095.97 ft <br /> Average Land Slope: 5.85 % <br /> Time of Concentration: 0.388 hrs, 23.3 mins <br /> Graphical Peak Discharge Thu Jun 09 09:05:10 2016 <br /> Project: New Horizon Mine By: JSS Date: 06/09/16 <br /> Location: C179 Checked: Date: <br /> Present <br /> 1. Data: <br /> Drainage area:....................A= 16.3349Acres <br /> Runoff Curve Number:.............CN=62 <br /> Time of Concentration:...........Tc=0.39 <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, la............ = 1.2258 <br /> 5. Compute la/P....................... = 0.6129 <br /> 6. Unit peak discharge, qu......csm/in=264.38 <br /> 7. Runoff,Q.........................in= 0.0868 <br /> 8. Pond& swap adjustment factor,...Fp = 1.00 <br /> 9. Peak Discharge,gp...............cfs=0.5859 <br /> Culvert 180 <br /> This 18" CMP conveys the flow from the Tailwater Ditch to the Postmining Channel below the <br /> Tailwater Ditch and will provide a crossing for the property owner. The design for this culvert is <br /> provided in the Pond 016 design located in Attachment 2.05.3(3)-36. <br /> Attachment 2.05.3(3)-1 Page 30 January 2019 (TR-88) <br />