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<br /> <br />Time of Concentation - basins <br /> <br />----------- <br /> <br />Catchments Overland Flow Shallow Flow Channel outlet outlet <br />at the Divide Elevation Length Slope lor Elevation Length Slope V" l,r Elevation Length Slope V""""" t,,1wwI t" t" <br /> U1S D/S (ft) (ftlft) (min) VIS D/S (ft) (ftlft) (fps) (min) VIS D/S (ft) (ftlft) (fps) (min) (min) (hr) <br />NCC VIS (l) \2\47 \2100 300 0.\6 \5 \2\00 \1360 2000 0.37 9 4 \1360 9240 2\660 0.\0 \\ 33 5\ 0.85 <br />NCC Basin 4 8960 8940 300 0.Q7 21 8940 8360 1000 0.58 10 2 20 43 0.71 <br />Silver Creek 10929 10870 300 0.20 13 10870 10420 2000 0.23 8 4 10420 8920 13880 0.11 5 46 64 1.07 <br />Missouri Creek 10200 \0160 300 0.13 16 10\60 9800 2000 0.18 7 5 9800 8380 21320 0.Q7 4 89 109 1.82 <br />Fourmile Gulch 9290 9240 300 0.17 14 9240 9070 2000 0.D9 5 7 9070 8000 12035 0.09 5 42 63 1.05 <br />Gregory UlS (8) 9620 9560 300 0.20 13 9560 9350 1000 0.21 8 2 9350 8940 7440 0.06 6 20 36 0.60 <br />Gregory D/S (9) 9974 9960 300 0.05 24 9960 9520 2000 0.22 8 4 9520 8040 9200 0.16 6 26 55 0.91 <br />Chase VIS (5) 10081 9980 300 0.34 II 9980 9560 1000 0.42 10 2 9560 8660 13925 0.06 6 38 51 0.85 <br />Chase D/S (6) 8995 8993 100 0.02 14 8993 8940 100.0 0.05 3.60 5 8940 8870 3600 0.02 2.1 29 47 0.78 <br /> .. <br /> <br />n=.I5 short grass (Table 3-1, TR55) <br />2yr, 24-hr rain = 1.6 in <br /> <br />V,r (Figure 3-1 TR55) <br /> <br />V'lwmclfrom subentleal HEC-2, hankfull, Chase and Greg. D/S & NC UlS <br />remainder from SCS velocity curve, grassed waterway <br />