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Runoff Curve Number and Runoff Tue Apr 20 15:01:48 <br />2010 <br />Project: Yule Quarry <br />Location: Basin 1 <br />1. Runoff Curve Number (CN) <br />Cover description CN Soil Group Area(Acre) <br />Forest 79 C &D 2.000 <br />Mined Land, Disturbed (Poor) 87 C 0.710 <br />CN (weighted): <br />Total Area: <br />81.1 <br />2.710 Acre <br />2. Runoff <br />Return Period: 10 -Year <br />Rainfall, P: 1.60 in <br />Runoff, Q: 0.3710 in <br />Runoff Volume: 0.0838 Acre -Ft <br />Time of Concentration (Tc) 0.05 hrs, 3 min. <br />Peak Flow 1.49 cfs <br />Sump 1 will have approximate dimensions of 25' x 30' x 5'. <br />Location: Basin 2 <br />1. Runoff Curve Number (CN) <br />Cover description CN Soil Group Area(Acre) <br />Forest 79 C &D 1.600 <br />Disturbed 87 D 1.007 <br />CN (weighted): <br />Total Area: <br />82.1 <br />2.607 Acre <br />2. Runoff <br />Return Period: 10 -Year <br />Rainfall, P: 1.60 in <br />Runoff, Q: 0.4048 in <br />Runoff Volume: 0.0879 Acre -Ft <br />Time of Concentration (Tc) 0.055 hrs, 3.3 min. <br />Peak Flow 1.58 cfs <br />Sump 2 will have approximate dimensions of 28' x 27' x 5'. <br />Yule Quarry April 2012 24 <br />By: BL Date: 04/20/10 <br />