FLOOD08569

• Designation Number: 574
• County: Jefferson
• Community: Arvada
• Stream Name: Ralston Creek and Leyden Creek
• Basin: South Platte
• Title: FHAD - Ralston Creek and Leyden Creek
• Date: 6/1/2004
• Prepared For: Douglas County, Arvada
• Prepared By: UDFCD
• Floodplain - Doc Type: Floodplain Report/Masterplan

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Aoodplain Refelmce Data 5_28_04.xls

Table 2
Ralston Creek
Floodplain Data Table for 10-, 50-, and 500- Year Discharges

Flooding Source lO-yr Floodplain Data SO-yr Floodplain Data SOO-yr Floodplain Data
Thalweg Elevation Discharge Flood Elevation Discharge Flood Elevation Discharge Flood Elevation
Identification Cross Section Station (NA VD 88) (crs) (NA VD 88) (crs) (NA VD 88) (crs) (NA VD 88)
134 93+39.9 5301.6 409t 5313.1 7932 5315.6 13200 5317.6
135 94+82.84 5303.8 4091 5313.0 7932 5315.4 13200 5317.5
136 101+45.3 5306.1 4091 5315.1 7932 5317.2 13200 5319.4
137 108+35.3 5309 .3 4091 5319.9 7932 5321.3 13200 5322.8
138 113+04.81 5312.7 4091 5322.8 7932 5325.5 13200 5327.3
139 t19+80.64 5317.4 4091 5328.2 7932 5330.0 13200 5331.6
t40 122+55.79 5320.0 409t 5328.7 7932 5330.2 13200 5331.1
Carr Street 140.5 Bridge Bridge Bridge
141 123+37.71 5320.7 4091 5329.6 7932 5334.8 13200 5336.8
142 125+98.96 5323.5 4091 5330.8 7932 5335.3 13200 5338.2
143 130+14.98 5324.4 4091 5333.2 7932 5335.4 13200 5338.3
t44 133+ 10.38 5326.0 4091 5335.3 7932 5337.3 13200 5339.6
145 139+09.27 5328.0 4091 5336.5 7932 5339.3 13200 5341.2
146 t42+73.45 5329.7 409t 5339.5 7932 5341.1 13200 5343.0
146.5 147+86.13 5334.0 2789 5342.5 5536 5343.7 9038 5344.6
147 153+t7. 5336.0 2789 5345.1 5536 5346.0 9038 5346.8
t48 154+48.27 5336.8 2789 5346.0 5536 5346.4 9038 5347.2
Garrison Street 148.5 Bridge Bridge Bridge
149 155+21.24 5337.2 2789 5347.0 5536 5348.1 9038 5348.7
t50 t56+l8.29 5337.9 2789 5346.4 5536 5348.8 9038 5349.6
150.5 t60+24.56 5337.6 2789 5348.7 5536 5350.t 9038 535t.0
151 164+47.66 5343.3 2789 5349.3 5536 5351.0 9038 5352.2
t52 168+72.67 5343.9 2789 5351.3 5536 5353.3 9038 5354.9
. 153 174+18.08 5346.1 2789 5353.7 5536 5355.8 9038 5358.2
154 176+17.96 5349.3 2789 5355.2 5536 5358.0 9038 5360.3
Brooks Drive 154.5 Culvert Culvert Culvert
t55 176+92.51 5349.6 2789 5357.3 5536 5359.3 9038 5360.2
155.5 180+33.21 5352.7 2789 5360.8 5536 5361.6 9038 5362.4
156 184+29.78 5355.2 2789 5363.2 5536 5364.2 9038 5365.1
157 185+49.t5 5355.6 2789 5362.3 5536 5364.3 9038 5365.t
West 6lst Avenue 157.5 Culvert Culvert Culvert
158 186+12.68 5356.2 2789 5365.3 5536 5364.7 9038 5365.5
159 t87+03.12 5356.8 2789 5366.0 5536 5366.0 9038 5366.6
160 190+53.1 5358.4 2789 5366.3 5536 5367.4 9038 5368.1
160.5 t95+29.34 5361.4 2789 5369.3 5536 5370.2 9038 5370.9
161 198+22.54 5362.6 2789 5371.5 5536 5372.5 9038 5373.1
162 199+40.78 5363.3 2789 5371.4 5536 5373.5 9038 5374.3
Rensselaer 162.5 Culvert Culvert Culvert
163 200+t4.95 5363.5 2789 5371.9 5536 5375.0 9038 5376.2
t64 204+25.69 5366.0 2789 5376.3 5536 5376.9 9038 5377.4

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