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<br />SUBBASIN B1-6 <br /> <br />Composite Runoff Curve Number Calculator <br />Description Area (ac) Curve Number <br />------------ ----------- -------------- <br />WOODED 45.780D 66 <br />GRASSES 13.0800 71 <br />ROADS 6.5400 90 <br />Total Area -----> 65.4000 69 <----- Weighted CN <br />