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Location: Basin 5 <br />1. Runoff Curve Number (CN) <br />Cover description <br />Forest <br />Disturbed <br />CN (weighted): <br />Total Area: <br />2. Runoff <br />Return Period: <br />Rainfall, P: <br />Runoff, Q: <br />Runoff Volume: <br />Time of Concentration (Tc) <br />Peak Flow <br />Sump 5 will have approximate dimensions of 25' x 26' x 5' with a 2' tall berm on <br />the downhill side. The berm will have 2H:1V sideslopes. <br />Location: Basin 6 and Basin 7 are Evaluated Together since both drain to Sump 6 <br />Project: Yule Quarry <br />Location: Basin 6 <br />1. Runoff curve number (Cn) <br />Cover description <br />Forest <br />Disturbed Road <br />CN (weighted): 80 <br />80.5 <br />2.520 Acre <br />10 -Year <br />1.60 in <br />0.3515 in <br />0.0738 Acre -Ft <br />0.043 hrs, 2.6 min. <br />1.38 cfs <br />By: GL <br />CN Soil Group <br />79 C &D <br />87 D <br />CN Soil Type Area <br />79 C &D 2.16 Acres <br />87 C 0.150 Acres <br />2. Runoff <br />Frequency • 10 yr <br />Rainfall, P (24 -hour) .. : 1.6 in <br />Runoff, Q • 0.3215 in <br />Runoff Volume • 0.0619 Acre -Ft <br />Time of Concentration Tc = 0.03 <br />Storm Type = II <br />Pond and swamp areas spread <br />throughout watershed = 0.00 percent 0.0000 Acres <br />Peak flow cfs = 1.137 <br />Yule Quarry January 2013 26 <br />Area(Acre) <br />2.050 <br />0.470 <br />