FLOOD10334 ‎(2)‎

• Designation Number: 588
• County: Arapahoe
• County: Jefferson
• Community: Littleton
• Stream Name: Massey Draw and SJCD (South)
• Title: FHAD - Massey Draw and SJCD ‎(South)‎
• Date: 12/1/2005
• Prepared For: Urban Drainage and Flood Control District, Jefferson County, Littleton
• Prepared By: Olsson Associates
• Floodplain - Doc Type: Floodplain Report/Masterplan

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Floodplain and floodway coincide

Thalweg 10-Year Floodplain 50- Year Floodplain 100-Year Floodplain Data 100-Year 0.5 ft EGL Floodway 100-Year 1.0 ft EGL Floodway 500-Year Floodplain
River
Section 10 Station Elevation Flow (cfs) W,S, Elev Flow (cfs) W.S. Elev Flow W.S. Top W.S. Top Oist. Left Oist. W.S. Top Dist. Left Dist. Flow (cfs) W.S. Elev
(ft) (cfs) Elev Width (ft) Elev Width (ft) (ft) Right (ft) Elev Width (ft) (ft) Right (ft)
17645 7645 5551.6 930 5559.2 2326 5561.7 2940 5562.3 87 5562.3 84 16 68 5562.3 60 14 46 3822 5563.0
17667 7667 5552,2 930 5558.9 2326 5560.6 2940 5561.6 47 5561.6 29 12 17 5561.6 29 12 17 3822 5562.9
17892 7892 5562.1 930 5568.5 2326 5569.9 2940 5570.5 206 5570.7 192 57 135 5571.4 100 54 46 3822 5571.1
17913 7913 5562.1 930 5568.8 2326 5570.6 2940 5571,2 222 5571.3 222 66 156 5571.9 222 66 156 3822 5571.8
18243 8243 5562.1 882 5568.9 2236 5570.7 2824 5571.4 463 5571.5 463 - - 5572.1 463 - - 3663 5572.1
18570 8570 5562.1 882 5568.8 2236 5570.4 2824 5571.0 103 5571.1 103 - - 5571.8 103 - - 3663 5571.5
18606 8606 5575.7 882 5579,0 2236 5580.6 2824 5581.2 95 5581,2 95 - - 5581,2 95 - - 3663 5581.8
19233 9233 5582.3 882 5584.9 2236 5586.4 2824 5586.9 129 5586.9 129 - - 5586.9 129 - - 3663 5587.6
19567 9567 5586.8 882 5590.0 2236 5592,0 2824 5592.6 71 5592.6 71 - - 5592.6 71 - - 3663 5593.4
19912 9912 5590.2 882 5595.5 2236 5597,7 2824 5598.2 110 5598.2 110 - - 5598.2 110 - - 3663 5598.9
20226 10226 5592,8 882 5598.1 2236 5600.2 2824 5600.8 139 5600.8 139 - - 5600.8 139 - - 3663 5601.6
20509 10509 5595.5 882 5599.4 2236 5601.3 2824 5601.9 91 5601.9 91 - - 5601.9 91 - - 3663 5602.6
20735 10735 5598.4 882 5601.8 2236 5603.4 2824 5604.0 98 5604.0 98 - - 5604.0 98 - - 3663 5604.7
20850 10850 5600.6 882 5604,1 2236 5605,8 2824 5606.4 86 5606.4 86 - - 5606.4 86 - - 3663 5607.1
20898 10898 5600.7 882 5605.7 2236 5607.7 2824 5608.4 66 5608.4 66 - - 5608.4 66 - - 3663 5609.3
20909 10909 5603.9 882 5608.0 2236 5610.1 2824 5610.8 66 5610.9 40 22 18 5610.9 40 22 18 3663 5611.9
21009 11009 5601.2 882 5616.5 2236 5617.6 2824 5617.9 487 5618.2 200 119 81 5618.4 170 99 71 3663 5618.3
21033 11033 5601.6 882 5616.6 2236 5617.8 2824 5618.2 942 5618.4 132 96 36 5618.6 132 96 36 3663 5618.5
21174 11174 5603.5 848 5616.6 2185 5617.8 2752 5618.2 517 5618.4 70 46 24 5618.5 50 36 14 3555 5618.6
21356 11356 5606.6 848 5616.6 2185 5617.9 2752 5618.2 574 5618.5 100 37 63 5618.7 60 17 43 3555 5618.6
21539 11539 5608.7 848 5616,6 2185 5617,9 2752 5618.3 233 5618.6 132 99 33 5618.9 80 49 31 3555 5618,7
21641 11641 5610.0 848 5616.6 2185 5617.7 2752 5618.1 112 5618.5 112 55 56 5619.0 80 47 34 3555 5618.3
21760 11760 5612,3 848 5616.6 2185 5617.9 2752 5618.3 84 5618.5 70 19 51 5618.9 60 19 41 3555 5618.6
21876 11876 5615,6 848 5618.9 2185 5620.9 2752 5621,5 150 5621.5 50 5 45 5621.5 50 5 45 3555 5622.3
22001 12001 5629.3 848 5626.0 2185 5627.0 2752 5627,3 223 5627.5 161 -55 216 5627.7 151 -55 206 3555 5627.6
22522 12522 5628.8 848 5633.6 2185 5634.7 2752 5635.1 245 5635.3 122 35 87 5635.5 98 35 63 3555 5635.4
22967 12967 5631.6 848 5640.3 2185 5641.5 2752 5641.8 197 5642.0 132 98 34 5642.2 106 72 34 3555 5642.1
23486 13486 5644,8 848 5650.1 2185 5651,5 2752 5651. 9 172 5652.0 80 65 15 5652.1 70 60 10 3555 5652.4
23548 13548 5647.9 848 5651.4 2185 5653.3 2752 5653.9 166 5653.9 64 38 26 5653.9 64 38 26 3555 5654.7
23809 13809 5652.2 848 5655.8 2185 5659.6 2752 5661,3 403 5661.3 403 - - 5661.3 403 - - 3555 5661.2
23840 13840 5653.2 848 5657.6 2185 5662.3 2752 5664.1 499 5664.1 499 - - 5664.1 499 - - 3555 5666.0
23950 13950 5655,8 787 5658.4 2040 5662.2 2632 5664,1 343 5664.1 343 - - 5664.1 343 - - 3300 5666.0
24396 14396 5660.5 787 5662.7 2040 5663.3 2632 5664.5 385 5664.5 385 - - 5664.5 385 - - 3300 5666.2
24883 14883 5666.9 787 5668.2 2040 5669.2 2632 5669.4 148 5669.4 148 - - 5669.4 148 - - 3300 5669.8
25145 15145 5670.0 787 5672.0 2040 5672.9 2632 5673.3 269 5673.3 269 - - 5673.3 269 - - 3300 5673.7
25462 15462 5673.6 787 5675.2 2040 5676,1 2632 5676.3 304 5676.3 304 - - 5676,3 304 - - 3300 5676.6
25706 15706 5676.5 787 5678.3 2040 5679.2 2632 5679.5 207 5679.5 207 - - 5679.5 207 - - 3300 5679,7
25994 15994 5679.3 787 5681.4 2040 5682.3 2632 5682.7 270 . 5682.7 270 - - 5682.7 270 - - , 3300 5683.0
26214 16214 5682.0 787 5683.5 2040 5684.0 2632 5684,3 312 5684.3 312 - - 5684.3 312 - - 3300 5684.5
26346 16346 5684,3 285 5684,9 1033 5685.5 1389 5685.7 315 5685.7 315 - - 5685.7 315 - - 1848 5685.9
26525 16525 5687.4 285 5688.1 1033 5688.8 1389 5689.0 173 5689.0 173 - - 5689.0 173 - - 1848 5689.3

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Table 6. Massey Draw Floodplain and Floodway Data