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NewFietds <br /> Newmont <br /> VLF/OSA Closure Study <br /> Schist Island Pit Closure Stormwater Bench Channels <br /> Watershed Characteristics and Lag Time Calculation <br /> 10.81(S + 1)0.7 <br /> tp 1900yO.5 <br /> tp Lag Time (hr.) <br /> I Length to Divide (ft) <br /> y Avg. Watershed Slope (%) <br /> CN Composite Curve Number <br /> S 1000/CN-10 (in.) <br /> la Initial Abstraction (0.2*S) <br /> Input Values <br /> Lag Time and Watershed Characteristics <br /> Watershed Area (mil) t M CN y 5 tp (hr) tp (min) la (in.) <br /> SCHIST 1 0.0301 984 71.00 1L7% 4.08 0.11 6.9 0.817 <br />