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<br />Table 4 <br />Estimated Lag Times <br /> <br />Sub- Estimated Lag Time (hrs) <br />watershed Kirpich Kerby USBR Stream H draulics SCSa <br /> V = 2 ft/sec V = 1 ft/sec <br />A 5.86 7.07 7.01 9.46 18.92 25.60 <br />B 3.38 5.06 4.68 5.46 10.91 13.990 <br />C 1.37 2,93 2,28 1.98 3.96 5,330 <br />D 1.66 3,29 2.60 1.67 3.34 7.070 <br />E 2.18 3.88 3.23 2,38 4.75 9,370 <br />F 2.77 4.49 3,97 4.22 8.45 11.400 <br />G 4.13 5,72 5.43 6.82 13.64 1 7.400 <br />H 4.78 6.24 5.83 7.26 14.52 18.15c <br />I 4.71 6.19 6,14 7.13 14.26 26.660 <br />J 0.76 2,05 1.25 0.62 1.23 2,72c <br />K 4.08 5.67 5.47 5.81 11.62 23.05d <br />L 2,68 4,39 3,56 3.17 6,34 10,IQc <br />M 3.93 5,54 5.20 6.29 12,58 14.48c <br />N 1.13 2.60 2.06 1.41 2,82 3.85c <br />0 3.86 5.49 5.12 6.25 12.50 14.204c <br />P 4,69 6.17 6.11 7.08 14.17 17.80c <br />Q 2.16 3.86 2.84 1.89 3,78 8.46c <br />R 2.96 4,67 4.18 3.96 7.92 10.98c <br />S 1.15 2.63 1.47 0.84 1.67 4.40c <br /> <br />a, Smaller values ofCN would result in larger values oftL, <br />b. Refers to CN =81; c. Refers to CN = 85; d, Refers to eN = 72 <br /> <br />2.5 SEQUENCE OF HYDROGRAPH COMPUTATIONS, COMBINING, AND <br />ROUTING <br /> <br />The sequence of computing surface runoff hydro graphs, combining hydrographs of different sub- <br />watersheds, and routing the combined hydro graphs through connecting stream channels is shown <br />in Table 5, This sequence is the same as used by the USACE in their hydrologic analysis. <br /> <br />Draft Letter Report <br />Independent Review of Hydrologic Analysis for Frenchman Creek <br />Contract No, DACW41-00-D-0026-0001 <br /> <br />Flood Plain Management Services Special Study <br />Holyoke. Colorado <br />June 18,2001 <br /> <br />Page 7 <br />