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Project: Pond 011 <br />Location: New Horizon Mine <br />Developed <br />By: B Langenfeld Date: 08/07709 <br />Checked: Date: <br />Curve Number: 80 <br />Length of Flow: 2231.07 ft <br />Average Land Slope: 2.03 % <br />Time of Concentration: 0.706 hrs, 42.4 mins <br />Graphical Peak Discharge <br />Basin 011A <br />Location: New Horizon Mine <br />Developed <br />1. Data: <br />Drainage area: .................... A = 25.5063 Acres <br />Runoff Curve Number: ............. CN = 80 <br />Time of Concentration: ........... Tc = 0.65 <br />Storm Type: ....................... =11 <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............ = 0.5000 <br />5. Compute la /P ....................... = 0.2500 <br />6. Unit peak discharge, qu ...... csm /in = 402.61 <br />7. Runoff ,Q .........................in = 0.5625 <br />8. Pond & swap adjustment factor .... Fp = 1.00 <br />9. Peak Discharge,gp ...............cfs = 9.0256 <br />Basin 011 B <br />Location: New Horizon Mine <br />Developed <br />1. Data: <br />Drainage area: .................... A = 101.9003 Acres <br />Runoff Curve Number: ............. CN = 80 <br />Time of Concentration: ........... Tc = 0.71 <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 = <br />3. Rainfall ,P(24 - hour) .............. in = 2.00 <br />X: \Western Fuels Nucla\Permit Revision 2009\Adequacy Response\Final Files \Comparison Documents\ATTACHMENT 2.05.3(3) -14 Pond <br />011- Comparison -22MAY 10. wpd <br />Attachment 2.05.3(3) -14 -3 <br />