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<br />. <br /> <br />.) <br /> <br />. <br /> <br />DRAFT SOUTH PLAITE RIVER TRIBUTARIES HYDROLOGY REPORT <br /> <br />FOUR MILE CREEK, HORSE CREEK, WEST CREEK, AND TROUT CREEK <br /> <br />Table 2 <br />6-Bour Rainf2ll11 Depths and Distribution <br /> <br />MINUTES 1o-YEAR 25-YEAR 50-YEAR 10o-YEAR SOU-YEAR ; MINUTES 10-YEAR 25-YEAR 50-YEAR 10o-YEAR SOo-YEAR <br />0 0.00 0.00 0.00 0.00 0.00 185 1.18 1.48 1.62 1.17 2.21 <br />5 0.02 0.02 0.02 0.02 0.03 190 1.20 1.50 1.65 1.80 2.25 <br />10 0.02 0.03 0.03 0.04 0.05 , 195 1.22 1.52 1.67 1.83 2.28 <br /> ) <br />15 0.03 0.04 0.04 0.05 0.06 i 200 1.24 1.54 1.70 1.85 2.32 <br />20 0.04 0.05 0.06 0.07 0.08 ; 205 1.25 1.57 1.72 1.88 2.35 <br />25 0.05 0.06 0.07 0.08 0.10 210 1.27 1.59 1.75 1.91 2.38 <br />30 0.06 0.08 0.09 0.10 0.12 215 1.29 1.61 1.77 1.93 2.42 <br />35 0.07 0.09 0.10 0.11 0.14 , 220 1.30 1.63 1.79 1.96 2.45 <br /> , <br />40 0.08 0.11 0.12 0.13 0.16 ; 225 1.32 1.65 1.81 1.98 2.47 <br />45 0.10 0.12 0.13 0.14 0.18 t 230 1.33 1.66 1.83 2.00 2.50 <br />50 0.11 0.14 0.15 0.16 0.20 i 235 1.35 1.68 1.85 2.02 2.52 <br />55 0.12 0.15 '0.17 0.19 0.23 240 1.36 1.70 1.87 2.04 2.55 <br />60 0.14 0.17 0.19 0.20 0.26 245 1.38 1.72 1.89 2.06 2.58 <br />65 0.15 0.19 0.20 0.22 0.28 250 1.39 1.74 1.91 2.09 2.61 <br />70 0.16 0.20 0.22 0.25 0.31 255 1.40 1.76 1.93 2.11 2.63 <br />75 0.18 0.22 0.25 0.27 0.34 260 1.41 1.77 1.94 2.12 2.65 <br />80 0.20 0.24 0.27 0.29 0.37 265 1.43 1.78 1.96 2.14 2.68 <br />85 0.21 0.26 0.29 0.32 0.40 ; 270 1.44 1.80 1.98 2.16 2.70 <br />90 0.23 0.29 0.32 0.35 0.43 275 1.45 1.81 2.00 2.18 2.72 <br />95 0.25 0.31 0.35 0.38 0.47 280 1.46 1.83 2.01 2.19 2.74 <br />100 0.27 0.34 0.37 0.41 0.51 285 1.47 1.84 2.02 2.21 2.76 <br />105 0.30 0.38 0.41 0.45 0.56 290 1.48 1.85 2.04 2.23 2.78 <br />110 0.33 0.41 0.45 0.49 0.61 295 1.49 1.87 2.06 2.24 2.80 <br />115 0.38 0.48 0.53 0.58 0.72 300 1.51 1.88 2.07 2.26 2.82 <br />120 0.46 0.58 0.64 0.70 0.87 305 1.52 1.90 2.09 2.28 2.84 <br />125 0.58 0.72 0.79 0.86 1.08 310 1.53 1.91 2.10 2.29 2.86 <br />130 0.68 0.85 0.93 1.02 1.27 315 1.54 1.92 2.11 2.30 2.88 <br />135 0.78 0.98 1.08 1.18 1.47 ) 320 1.55 1.93 2.13 2.32 2.90 <br />140 0.88 1.10 1.21 1.33 1.66 325 1.56 1.95 2.14 2.34 2.92 <br />145 0.97 1.21 1.33 1.45 1.82 330 1.57 1.96 2.15 2.35 2.94 <br />150 1.00 1.25 1.38 1.51 1.88 335 1.58 1.97 2.17 2.36 2.96 <br />155 1.04 1.30 1.43 1.56 1.94 340 1.58 1.98 2.18 2.38 2.97 <br />160 1.06 1.32 1.46 1.59 1.99 345 1.59 1.99 2.19 2.39 2.98 <br />165 1.09 1.36 1.50 1.63 2.04 350 1.60 2.00 2.20 2.40 2.99 <br />170 1.12 1.40 1.54 1.68 2.09 355 1.60 2.00 2.20 2.40 3.00 <br />175 1.14 1.42 1.56 1.70 2.13 360 1.60 2.00 2.20 2.40 3.00 <br />180 1.16 1.45 1.59 1.74 2.17 <br /> <br />2.2 Sub-Basins <br /> <br />Individual sub-basin delineations were made based on the watershed topography and the <br />stream network. Figure 2 illustrates the sub-basins locations. The sub-basin IDs <br />beginning with a "T' indicate Trout Creek sub-basins, "W" indicates West Creek sub- <br />basins, "F" represents Four Mile Creek Sub-basins and "H" represents Horse Creek sub- <br />basins. <br /> <br />To model basin runoff, the SCS procl::dure within HEC-HMS was used to calculate peak <br />discharges. The sub-basin characteristics are illustrated in Table 3. These characteristics <br /> <br /> <br />Page 7 <br />