FLOOD00802

• Designation Number: 355
• County: Weld
• Community: Greeley
• Stream Name: Cache La Poudre
• Title: Floodplain and Floodway Analysis
• Date: 1/1/1994
• Designation Date: 3/1/1994
• Floodplain - Doc Type: Floodplain Report/Masterplan

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IR [R? ~ [DJ G [[ !J-D 11 [DJ [R A LD lLJ CON [F ((]) [R? 1M] A If I] co) ~

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DISCHARGE-F"REOUENCY

STAGE-DISCHARGE

12

sv..ce: AT lIPSTREAt.l FACE OF BRIDGE
.....~...EXISTlNG
-- N[}Y CONSTRUCTION

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46.39

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46.35

DESIGN

OIClO - 10.700 crs

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I~ 2..3.3 , 10 2' $0 100
RECURRENCE INTERVAL IN YEARS

46;J.,

ElEVATION OF
1l-lALwEG .~625. 7
6 7 a . $I' 10 II
Q DISCHARGE IN 1000 CFS

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TYPICAL RIPRAP DETAIL

Upper riprop reference line (IJRL)
Riprop Thickness (l) - 21 in.
Riprop size (D ~ ) ~~ 9 in.
Excavated channel width - 123
iNet ch<lnnel w;dth -

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1'15 It.

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6" of Embankment /"

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(Dro;noge Closs A)
lower ri ro
re erence lne

Excavation'

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Oroinoge keo 1875 Sq. t.li.
CHANNE~ DESCRIPTION
Bottom Ir.Ioter'Ki - Cohesive aI Non Cohesive III
Bottom ilIatet"ioI Size - Cloy m Silt 0 Sand III CrevellZl
Cobbles 0 Other 0
Stream form - StroiQht l!ll Meandering 0 Broided 0
t.knni1'l9S "n" 'Of Design - Channel .045 Overbank .05
Debris - Brush a Trcc'.S/Logs G Ice C Other 0
CO..PARISION OF HYDRAULICS"
V.locrty rr..board Wox. Bockwt:Jf.r
~;:'~'C:::::::::::::Hg..:::::::::::~::::::::::::f:7.:::::::::: :1::::::::::::::::8:/::::::::::: ~:
"AT PROPOSED BRIDGE: ~OCATlON DURING DESIGN DISCHARGE

203

CO....ENTS

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