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NewFields <br /> Newmont <br /> VLF/OSA Closure Study <br /> Squaw Gulch OSA Stormwater Diversion Channel <br /> Watershed Characteristics and Lag Time Calculation <br /> 10.8(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 /> Water-shed Area(mil) I(ft) CN tt S tP(hr) tP(min) la(in.) <br /> Southl 0.1674 5,620 67.84 28.1% 4.74 0.34 20.2 0.948 <br /> ECOSA West1 0.0965 1 3,425 1 70.70 20.1% 1 4.14 0.25 14.9 0.829 <br /> Reach Data <br /> Reach Lerath k4ax Hew. hUrL Elev Slope i Wkkh INanning`s n Side Slope <br /> 00 00 (ft/ft) W-10 <br /> Ch. 2 3,764 10,476 10,194 0.075 12 0.078 2.5 <br />