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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f\oodpl.ain Ref<<~uce Data L2&_04.ltb.
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Table 2
Ralston Creek
Floodplain Data Table for 10-, SO-, and SOO-Year Discharges

Flooding Sonrce IO-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) (cfs) (NA VD 88) (cfs) (NA VD 88) (cfs) (NA VD 88)
232 467+ 13.83 5581.0 314 5584.9 3052 5589.3 8272 5592.2
233 470+38.34 5585.3 314 5588.0 3052 5591.8 8272 5594.5
234 473+72.06 5588.3 314 5591.9 3052 5596.1 8272 5598.0
235 476+85.0t 5587.5 314 5593.9 3052 5598.3 8272 5601.9
236 482+ 15.65 5597.0 314 5598.7 3052 5603.2 8272 5607.7
Quaker Street 236.5 Mult Ooen Mult Open Mult Open
237 483+83.01 5597.9 3t4 5600.5 3052 5607.2 8272 5613.2
238 489+91.94 5606.8 3t4 5610.4 3052 5614.3 8272 5617 .2
239 496+34.72 5617.0 314 5619.5 3052 5622.2 8272 5623.8
240 501+t6.3 5622.6 314 5624.7 3052 5628.6 8272 5630.4
240.5 505+08.86 5626.0 314 5628.8 3052 5633.4 8272 5636.0
241 509+58.16 5632.0 314 5634.6 3052 5638.t 8272 5640.0
242 513+50.66 5636.9 314 5639.1 3052 5642.t 8272 5644.0
243 516+79.31 5640.9 314 5643.3 3052 5645.8 8272 5647.6
244 517+36.86 5640.8 314 5644.0 3052 5647.0 8272 5649.7
245 5t8+49.93 5645.1 3t4 5649.1 3052 5652.3 8272 5653.1
246 519+40.81 5649.0 314 565t.l 3052 5654.0 8272 5655.2
246.5 522+38.49 5653.5 314 5655.7 3052 5658.2 8272 5659.8
247 524+91.32 5657.5 314 5659.6 3052 5662.6 8272 5664.6
248 525+84.05 5658.7 314 5660.6 3052 5663.8 8272 5665.6
Arvada-Blunn Reservoir Discharge 249 530+50.13 5662.0 10 5663.0 10 5664.7 10 5666.8
249.5 533+25.18 5665.6 10 5666.7 10 5666.5 10 5666.8

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