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• DITCH C-4 <br />Time of Concentration (SCS Method) <br />Curve Number: 81 <br />Length of Flow (ft): 4924.62 <br />Average Land Slope (percent): 7.8 <br />Time of Concentration (hrs): 0.66 <br />DITCH C-4 <br />Graphical Peak Discharge <br />Project: NUCLA MINE By: GL <br />Location: DITCH C-4 Checked: <br />• Present <br />1. Data: <br />Date: 02/16/06 <br />Date: <br /> <br />Drainage area :....................A = 99.2000 Acres <br />Runoff Curve Number :.............CN = 81 <br />Time of Concentration:...........Tc = 0.66 <br />Storm Type :....................... = II <br />Pond and swamp areas spread <br />throughout watershed ............... = 1.00 percent of A <br />0.9920 Acres <br />• <br />REVISED MARCH 2006 <br />Attachment 2.05.3(3)-1-13 <br />