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
(C(mtlnued)

Floodplain Data FIoodwayData 1o-Year Data 5O-Year Data
100-Year FJoodplain 100-Year FJoodway Floodway FJoodway!' Floodway!' FJoodway
Cross Stream 100-Year Water Top Channel Water Top Width Width Channel Water Water
Sadion Thalweg Discharge Surface Width Velocity Surface Width Left Right Velocity Discharge Surface Discharge Surface
Number Station!' Elevation (<:Is) Elevation (ft) (ftIsec) Elevation (ft) (ft) (ft) (ftIsec) (cis) Elevation (cis) Elevation
LOWER DAD CLARK GULCH (WITH MCLELLAN FLOOD STORAGE)
1 8+95 5356.5 870 5358.9 354 4.6 5358.9 288 272 16 4.8 385 5358.6 700 5358.8
2 17+95 5362.4 870 5364.0 847 1.4 5364.5 522 510 12 2.1 385 5363.7 700 5363.9
45 25+30 5366.3 870 5368.1 394 7.0 5368.5 273 265 8 8.3 385 5367.8 700 5368.1
50 32+95 5370.8 870 5374.1 120 3.8 5374.3 83 39 44 3.8 385 5373.1 700 5373.8
552 34+90 5372.6 870 5375.0 56 7.8 FLOODWAY IN CHANNEL 385 5374.1 700 5374.8
55.3 35+60 5372.7 870 5376.5 52 5.7 . 385 5375.4 700 5376.1
61.4 36+00 5373.4 870 5376.7 50 6.5 . 385 5375.6 700 5376.4
61.5 36+22 5373.8 870 5376.9 46 7.4 . 385 5375.8 700 5376.6
66.6 37+20 5374.2 870 5378.5 107 4.0 5:;j78.4 90 25 65 4.0 385 5377.0 700 5378.0
67.7 38+00 5374.6 870 5378.9 75 6.3 FLooDWAY IN CHANNEL 385 5377.8 700 5378.5
67.8 38+15 5374.8 870 5379.4 77 4.8 . 385 5378.5 700 5379.1
70 39+40 5377.5 870 5380.4 86 6.0 ~80.4 75 23 52 6,0 385 5379.4 700 5380.1
80 44+50 5380.0 850 5384.3 100 5.1 5~84.6 42 24 18 5.3 385 5383.2 655 5383.9
85 49+60 5382.4 850 5386.9 69 5.4 ~87.3 55 32 23 4.9 385 5385.7 655 5386.4
90 53+60 5388.0 850 5391.4 67 8.2 ~91.4 40 20 20 8.9 385 5390.5 655 5391.1
100 55+87 5387.0 850 5392.5 97 1.6 5~92. 7 97 45 52 1.6 385 5391.2 655 5392.0
11 Stationing based on distance in feet upstream of confluence.
!! Measured from stationing line looking doWnstream.