FLOOD03385

• Designation Number: 312
• County: Arapahoe
• Community: Littleton
• Stream Name: Lower Dad Clark Gulch, and DFA 0068
• Basin: South Platte
• Title: Flood Hazard Area Delineation - Lower Dad Clark Gulch, and DFA 0068
• Date: 11/1/1990
• Designation Date: 3/1/1991
• Floodplain - Doc Type: Floodplain Report/Masterplan

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TABLE B-1
(Continued)

Floodplain Data Floodway Data 10- Year Data 50-Year Data
100-Year Floodplain 100-Year Floodway FIoodway Floodway!' Floodway!' Floodway
Cross Stream 100-Year Water Top Channel Water Top Width Width Channel Water Water
Section Thalweg Discharge Surface Width Velocity Surface Width Left Right Velocity Discharge Surface Discharge Surface
Number Station!! Elevation (cis) Elevation (It) (ltIsec) Elevation (It) (It) (It) (ltIsec) (cls) Elevation (cis) Elevation
RANGEVIEW GULCH (continued)
130 58+90 5429.4 390 5438.9 311 0.3 5438.9 245 148 97 0.3 140 5438.3 310 5438.7
135 63+15 5436.2 390 5438.9 128 1.4 5438.9 102 46 56 1.4 140 5438.3 310 5438.7
140 67+25 5452.1 260 5454.3 42 5.9 FLOODWAY IN CHANNEL 90 5453.6 180 5454.0
145 71+30 5460.4 190 5461.5 175 1.8, . 70 5461.1 140 5461.4
150 73+40 5460,5 190 5461.9 154 1.0 . 70 5461.4 140 5461.8
160 74+85 5468.1 190 5468.6 162 3.5 5468.6 124 13 111 3.7 70 5468.4 140 5468.5
170 75+20 5462.6 190 5468.8 188 0.5 5468.8 97 52 45 0.5 70 5468.5 140 5468.7
175 78+20 5469.5 100 5470,6 37 4.6 5470.6 32 18 14 4.7 40 5470.2 70 5470.4
180 82+60 5482.4 50 5483.3 57 2.6 FLOODWAY IN CHANNEL 20 5483.1 35 5483.2
185 84+80 5488.0 50 5489.1 30 3.0 . 20 5488.8 35 5489.0
E Stationing based on distance in feet upstream of confluence (Beginning station at confluence w~h Lee Gulch is 10+00)
!! Measured from stationing line looking downstream.
!! Total discharge is 950 cfs. Reduction due to overflow between cross sections 3.0 and 3.8.
~ Floodway based on no overflow between cross sections 3.0 and 3.8.