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 1o-Year Data 5O-Year Data
100-Year Floodplain 100-Year Floodway Floodway Floodway!' FIoodway!' 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 (cfs) Elevation (ft) (fVsec) Elevation (ft) (ft) (ft) (fVsec) (cfs) Elevation (cfs) Elevation
JACKASS GULCH (continued)
125 80+60 5543.0 450 5544.4 125 5.0 FLOODWAY NOT DEFINED 180 5544.1 330 5544.3
130 88+05 5555.0 450 5556.5 124 5.0 . 180 5556.1 330 5556.3
135 95+60 5564.5 450 5565.7 165 5.0 . 180 5565.3 330 5565.5
11 Stationing based on distance in feet upstream of confluence.
!! Measured from stationing line looking downstream.
! Total discharge for the lower reach is 1500 cfs. For cross sections 30, 40, 50, 50, and 65, 260 cfs is in storm sewer system and 1240 cfs flows overland.