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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Floodplain Reference Data 5_28_04.xls

Table 2
Ralston Creek
Floodplain Data Table for 10-, SO-, and SOO-Year Discharges

Flooding Sonrce lO-yr Floodplain Data SO-yr Floodptain Data SOO-yr Floodptain Data
Thalweg Elevation Discharge Flood Elevation Discharge Flood Elevation Discharge Flood Elevation
Identification Cross Section Station (NA VD 88) (cfs) (NA VD 88) (cfs) (NA VD 88) (cIs) (NA VD 88)
t65 209+72.36 5369.0 2789 5379.1 5536 5380.2 9038 5381.0
166 216+58.19 5373.8 2789 5382.1 5536 5383.5 9038 5384.3
167 222+22.18 5376.0 2789 5382.9 5536 5384.3 9038 5385.3
168 224+51.48 5377 .5 2189 5385.0 5536 5386.3 9038 5387.4
Miller Street 168.5 Bridge Bridge Bridge
169 225+59.49 5378.3 2789 5387.1 5536 5387.9 9038 5389.5
170 226+74.96 5378.4 2789 5386.7 5536 5389.5 9038 5390.6
17l 231+89.62 5382.0 2789 5389.7 5536 5391.3 9038 5392.4
172 235+34.22 5384.0 2789 5389.7 5536 5391.2 9038 5392.4
173 239+63.88 5388.0 2789 5393.9 5536 5396.6 9038 5397.1
t74 243+03.82 5389.9 2789 5398.7 5536 5399.9 9038 5400.7
Oak Street 174.5 Culvert CulverJ Culvert
175 243+80.17 5390.t 2789 5400.0 5536 5401.8 9038 5402.5
176 248+07.65 5394.2 2789 5401.3 5536 5403.3 9038 5404.2
177 250+92.67 5395.5 2789 5404.4 5536 5406.1 9038 5407.0
178 254+80.72 5398.0 2789 5406.9 5536 5408.1 9038 5408.9
West 68th Avenue 178.5 Bridge Bridge Bridge
179 255+57.t 5399.0 2789 5407.2 5536 5408.7 9038 5409.5
180 258+67.08 5404.0 2789 5411.3 5536 5412.5 9038 5413.1
180.5 262+ 18.63 5404.9 2789 5412.7 5536 5413.6 9038 5414.3
181 266+32.1 5414.0 2789 54t6.7 5536 54t8.t 9038 5418.7
182 272+ t6.49 5415.7 2789 5420.3 5536 5421.5 9038 5422.5
183 276+t8.79 5417.7 2028 5421.7 3762 5422.6 8125 5424.7
t83.5 278+63.56 5419.4 2028 5423.4 3762 5425.0 8125 5428.5
t84 279+25.67 5420.0 2028 5424.4 3762 5426.2 8t25 5430.3
Sinuns Street 184.5 Bridge Bridge Bridge
185 280+02.t8 5420.0 2028 5426.3 3762 5429.4 8t25 5433.0
186 283+93.25 5421.9 2028 5426.6 3762 5430.0 8t25 5433.5
187 287+52.75 5424.0 2028 5429.5 3762 5430.8 8125 5433.9
188 290+82.77 5426.6 0 2028 5432.5 3762 5433.8 8125 5435.4
189 294+ 12.27 5429.2 2028 5434.7 3762 5435.9 8125 5437.7
190 294+74.03 5429.6 2028 5436.5 3762 5438.0 8125 5439.7
19t 294+87.6 5430.8 2028 5436.5 3762 5438.0 8t25 5439.8
t92 298+04.3 5433.8 2028 5441.5 3762 5442.0 8125 5443.0
193 303+86.81 5441.2 2028 5446.3 3762 5446.8 8125 5448.0
194 308+t9.18 5443.7 2028 5450.0 3762 5451.6 8125 5453.1
Ward Road 194.5 Bridge Bridge Bridge
195 309+ 17.56 5443.6 2028 5451.3 3762 5453.0 8125 5454.1
196 315+58.43 5448.6 2028 5455.4 3762 5456.3 8125 5457.7
197 321+85.17 5454.0 2028 5459.8 3762 5461.0 8125 5463.0

15

6121J2004