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Runoff Curve Number and Runoff Tue Apr 20 15:01:48 <br />2010 <br />Project: Yule Quarry By: BL Date: 04/20/10 <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): 81.1 <br />Total Area: 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): 82.1 <br />Total Area: 2.607 Acre <br />2. Runoff <br />Return Period: <br />Rainfall, P: <br />Runoff, Q: <br />Runoff Volume: <br />Time of Concentration (Tc) <br />Peak Flow <br />10-Year <br />1.60 in <br />0.4048 in <br />0.0879 Acre-Ft <br />0.055 hrs, 3.3 min. <br />1.58 cfs <br />Sump 2 will have approximate dimensions of 28' x 27' x 5'. <br />Yule Quarry April 10 20