FLOOD01635

• Designation Number: 558
• County: Douglas
• Community: Douglas County Unincorporated
• Title: Flood Hazard Area Delineation - Plum Creek Watershed
• Date: 11/1/2001
• Designation Date: 1/2/2002
• Prepared By: UDFCD, WRC Engineering
• Floodplain - Doc Type: Floodplain Report/Masterplan

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Table ill-8: CUHP Sub-Watershed Parameters for Southeast Section of Study Area (coutinued)
DETENTION DETENTION INITIAL FINAL I
CENTROID EXISTING FUTURE TIME OF STORAGE STORAGE INFlL TRA TION DECAY INFIL TRA TION
WATERSHED AREA LENGTH LENGTH IMPERV. IMPERV. SLOPE CONCEN. (PERVIOUS) (IMPERVIOUS) RATE COEFF. RATE
DESIGNATION (satiaTe miles) (miles) (mile~) % % (feet/foot) (minutes) (inches) (inches) (inches/hour) (] /second) (inches/hollr) I
50 0.119 0.636 0.246 2.00 15.00 0.044 OA 0.1 4.50 0.00[8 0.60
5[ 0.023 0.189 0.057 2.00 [5.00 0.020 OA 0.1 4.50 0.0018 0.60
52 0.045 0.530 0.208 2.00 15.00 0.027 OA 0.1 4.50 0.0018 0.60 I
53 0.051 0.341 0.152 2.00 15.00 Oml OA OJ 4.50 0.0018 0.60
54 0.036 OA17 0.170 2.00 18.15 0.020 OA 0.1 4.50 0.00[8 0.60
55 0.122 0.795 0.303 2.00 20.00 0.043 OA 0.1 4.50 0.0018 0.60 I
56 0.119 0.606 0.189 2.00 20.00 0.048 OA 0.1 4.50 0.0018 0.60
57 0.073 OA92 0.227 2.00 20.00 ' 0.050 OA 0.1 4.50 0.0018 0.60
58 0.112 0.625 0.189 2.00 20.00 0.041 OA 0.1 4.50 0.0018 0.60 I
59 0.115 0.663 0.208 2.00 20.00 0.047 OA 0.1 4.50 0.0018 0.60
60 0.066 0.398 0.152 2.00 20.00 0.036 OA 0.1 4.50 0.0018 0.60
61 0.070 0.682 0.284 2.00 20.00 0.038 OA 0.1 4.31 0.0018 0.59
62 0.151 0.814 OA17 2.00 20.00 0.041 OA 0.1 3.61 0.0018 0.54 I
63 0.158 0.682 0.398 2.00 20.00 0.053 OA OJ 4.50 0.0018 0.60
64 0.128 0.871 OA36 2.00 20.00 0.049 OA 0.1 4.29 0.0018 0.59
65 0.089 OA73 0.189 2.00 20.00 0.035 OA 0.1 4.50 0.0018 0.60 I
66 0.115 0.663 0.246 2.00 20.00 0.046 OA OJ 3.94 0.0018 0.56
67 0.102 0.530 0.227 2.00 20.00 0.046 0.4 0.1 3.00 0.0018 0.50
68 0.179 1.326 0.739 2.00 19.88 0.038 OA 0.1 4.50 0.00 18 0.60 I
69 0.069 0.530 0.265 2.00 20.00 0.048 OA 0.1 4.50 0.0018 0.60
70 0.164 1.061 0.511 2.00 20.00 0.039 OA 0.1 4.50 0.0018 0.60
71 0.086 0.691 0.303 2.00 18.22 0.033 OA 0.1 4.50 0.0018 0.60 I
72 0.131 0.758 0.341 2.00 20.00 0.032 OA 0.1 4.32 0.0018 0.59
73 0.160 1.061 0.511 2.00 20.00 0.029 OA 0.1 4.22 0.0018 0.58
74 0.122 0.568 0.265 2.00 20.00 0.045 OA OJ 3.94 0.0018 0.56 I
75 0.155 0.682 0.284 2.00 2.72 0.050 OA 0.1 4.50 0.0018 0.60
76 0.080 0.492 0.246 2.00 2.00 0.055 OA OJ 4.50 0.0018 0.60
77 0.180 0.966 0.511 5.56 14.87 0.017 OA 0.1 4.50 0.0018 0.60 I
78 0.217 0.871 0.303 2.00 3.14 0.054 OA 0.1 4.50 0.0018 0.60
79 0.178 0.777 0.360 2.00 2.99 0.054 OA OJ 4.50 0.0018 0.60
80 0.166 0.795 0.189 2.00 2.00 0.061 OA 0.1 4.37 0.0018 0.59
81 0.167 0.625 0.246 2.00 2.00 0.065 OA OJ 3.18 0.0018 0.51 I
82 0.093 0.644 0.322 2.00 2.85 0.046 OA 0.1 4.50 0.0018 0.60
83 0.044 0.568 0.265 2.00 4.30 0.027 OA 0.1 4.50 0.0018 0.60
84 0.137 0.909 OA73 2.00 2.00 0.060 OA 0.1 4A3 0.0018 0.60 I
85 0.097 0.720 0.303 2.00 2.00 0.053 OA 0.1 4.50 0.0018 0.60
86 0.086 0322 0.233 2.00 5.75 0.053 OA 0.1 4.50 0.0018 0.60
87 0.071 0.606 0.360 2.00 2.83 0.044 OA 0.1 4.50 0.0018 0.60 I
88 0.121 0.720 0.303 2.00 2.00 0.042 OA 0.1 4.50 0.0018 0.60
89 0.158 OA92 0.114 2.00 2.00 0.067 OA 0.1 4A9 0.0018 0.60
90 0.032 0.243 0.141 2.00 5.31 0.050 OA OJ 4.50 0.0018 0.60 I
91 0.237 0.909 0.284 2.08 2.11 0,054 OA 0.1 4.50 0.0018 0.60
92 0.010 0.679 0.430 3.57 5.00 0.039 OA 0.1 4.50 0.0018 0.60
93 0.135 0.682 0.322 4.05 4.73 0.039 OA 0.1 4.50 0.0018 0.60 I
94 0.159 0.852 0.379 2.01 3.44 0.037 OA 0.1 4.50 0.0018 0.60
95 0.085 0.682 0.322 2.00 2.36 0.040 OA 0.1 4.50 0.0018 0.60
96 0.027 0.398 0.189 2.00 2.00 0.042 OA 0.1 4.50 0.0018 0.60
97 0.127 0.739 0.341 2.00 2.00 0.058 0.4 0.1 4.50 0.0018 0.60 I
98 0.150 0.758 0.360 2.00 2.00 0.052 0.4 0.1 4.50 0.0018 0.60
111-[8 I