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• Average Land Slope (percent): 7.1 <br />Time of Concentration (hrs): 0.55 <br />CULVERT 112 <br />Graphical Peak Discharge <br />Project: NUCLA MINE <br />Location: CULVERT 112 <br />Present <br />1. Data: <br />By: GL Date: 02/20/06 <br />Checked: Date: <br />Drainage area :....................A = 114.6000 Acres <br />• Runoff Curve Number :.............CN = 78 <br />Time of Concentration:...........Tc = 0.55 <br />Storm Type :....................... = II <br />Pond and swamp areas spread <br />throughout watershed ............... = 1.00 percent of A <br />1.1460 Acres <br />2. Frequency ........................yr = 10 <br />3. Rainfall,P(24-hour) ..............in = 2.00 <br />4. Initial abstraction, Ia............ = 0.5641 <br />• REVISED MARCH 2006 <br />Attachment 2.05.3(3)-1-75 <br />