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SUBBASIN B1-3 <br /> <br /> <br />Composite Runoff Curve Number Calculator <br />Description <br />GRASSES <br />ROADS <br />FILL SLOPES <br />Total Area <br />Area (ac) <br />5.2600 <br />15.7800 <br />5.2600 <br />0.0000 <br />-----> 26.3000 <br />Curve Number <br />-------------- <br />71 <br />90 <br />50 <br />0 <br />78 <----- Weighted CN <br />