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Location: Basin 5 <br />1. Runoff Curve Number (CN) <br />Cover description CN Soil Group Area(Acre) <br />Forest 79 C &D 2.050 <br />Disturbed 87 D 0.470 <br />CN (weighted): <br />Total Area: <br />80.5 <br />2.520 Acre <br />2. Runoff <br />Return Period: 10 -Year <br />Rainfall, P: 1.60 in <br />Runoff, Q: 0.3515 in <br />Runoff Volume: 0.0738 Acre -Ft <br />Time of Concentration (Tc) 0.043 hrs, 2.6 min. <br />Peak Flow 1.38 cfs <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 <br />Project: Yule Quarry By: GL <br />Location: Basin 6 <br />1. Runoff curve number (Cn) <br />Cover description CN Soil Type Area <br />Forest 79 C &D 0.880 Acres <br />Disturbed Road 87 C 0.070 Acres <br />CN (weighted): 80 <br />2. Runoff <br />Frequency • 10 yr <br />Rainfall, P (24 -hour) .. : 1.6 in <br />Runoff, Q • 0.3236 in <br />Runoff Volume 0.0256 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 = 0.4677 <br />Sump 6 will have approximate area of 200 square feet with a depth of 5.0 feet. A 2' <br />tall berm will be placed on the downhill side. The berm will have 2H:1V sideslopes. <br />Yule Quarry April 2012 26 <br />