FLOOD10397

• County: Statewide
• Basin: Statewide
• Title: Colorado Flood Proofing Manual
• Date: 10/1/1986
• Prepared By: CWCB
• Floodplain - Doc Type: Educational/Technical/Reference Information

TABLE OF CONTENTS

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LIST 0 F F IGU RES, , , . , , . , . , . , , , , . , , , , , . . , . . , , , , , , . , . , . , . , , . , . , , . , , . . , , , , . . , , , . , . . . . , , . , . . , , . , , , . , , . , . , . v

LIST OF TABLES",.".".",., _,..,.,."".."."."..".,..,....,."."..".,.,.,.",.,..".,...,.". vii

PREFACE.",."""".,.".".."",."",.""""...,..."."."."..".,.",."..,..",..,....,.,.... ix

ACKNOWLEDGEMENT"" ,.""", '.', .",...", ,., .."" ,., ..' .". ".. ,.. .."" ,..'.' ,..,." ,., .".. x

SUMMARy",.,..",. """"" , """ ",.,.."..,.,.,.,...".".".,......".....,..........",,',.,., xi
LINTRODUCTION

1,1 Concept of Floodproofing , , , , . , , . , , , , , , . , , . , . , , , , , , , , , , , , . , , , . . , , . , , , . , , , , , , , , , . . . , . . , , , , . , , . " ".,. 1
1.2 Classification of Floodproofing, , , , . . . . . . , , . . , . , , , . . , . , , . , . . . . . . . . . . , . , , . . . . , , , , , . . . . . . . , , , . , . . , , . , , , . 1

1,3 Types of Structures, , , , '" , '" ." ",., , " ,.. .., ... '" , , . ..., '.' ". , ,. '... . , , , , . ... ... .,. .. ,.,." " ,.. )

II. GLOSSARY".-,."."",.."",.",.".".".".,..,..,..,..",..",."",."..,."".."..,.",.,.", 8
IlLPHYSIOGRAPHIC CONSIDERATIONS FOR FLOODPROOFING ACTIVITIES

3,1 General."",...,."""""".""..,.,..",."".",...,."."",."....."..,....",."...,.,.". 13
3,2 Channel Cross Section and Slope. , , . , , . , , . , . . . , , . , , , , , , . , , , , . . , . , , , . . . . . . . , , , , . . . . . , , . . , , . , . . . , , . . .. 13

3,) Vegetation""",.".",."....,."",.,...,..,.,.",..".,...,.".....,....,.,......,.".,..,...,.. 13
).4 Soil Characteristics"."."""."""."...,....",."....".."".,..",...".,...,.".",..,..".. 14
),5 Erosion and Sedimentation.."."".....""",."..,..,..,..".,.." "...",..,...,.....,."...,'.. 14
),6 Debris""",."",.",.,...,."""",....,."",...,.,..,."",..".,..."".....,.,.....,.",..,. 15
IV, EXAMPLES OF FLOODPROOFED STRUCTURES................,............................... 19
V. NATURAL AND INHERENT METHODS OF FLOODPROOFING

5,1 General.""..,."""."", _ , ,.. , , , ,.. , ." " , ,., ,. , " ,., ,., ,., , ., , .. ,., ". ". , ,. ,.....'", ,. ,... ... 37
5.2 The Flood Plain...",.".,...,.."",."..".".".,...."..,.,..".,.",.,...".,........,.".,.,., 37
5,3 Natural Features. , , . , , , . , , , . . , . , , , , , . . . , , , , , . , . , , , , , , . , , . . . . . . , . , , . . , , . . . . . . , . , . . , .. , . . . . , , . , . . . , . ., 38
5.4 Development Features, , , , , . , , . . , , . , , , , , , , , . . , . , , , , . . , . , . , , . . , . . , . . . . . , , . . , . , . , . . . , . . . . . . . . . , , , . , . ,. 40
VI. WATER LOADINGS

6,1 General."""",.".".",.,..""..,..""".,..".".,.."....,..,..,..,.."......,......,....,.. 41
6,2 Hydrostatic Loads."..,.",., , . , , . , , , , . , , , , . , . , , , , , . , , . . , , , . . . , . . , . . , . . . . . , . . , , . , . . . , . . . . . . , . . , . , , .. 41
6,2,1 Types of Forces, , , , , , , , . . , , , , , , . . . . , , . , , , . , . . . , . , , , , , . , . . . , . , , . . , . , , . , , , , , , . . . . . . . . . , . , , , . . . , , .. 41
6,2,2 Application"".",..,...."",.",.""",..,.."",.,.."........"",.,..,..........,..,...,. 41
6.2,) Methodology""""""..,.."""".,.""".,..,.....".",.,."."",.,.."......"..,..". 42
6,3 Hydrodynamic Loads", , , , . . , , , , , , , , . , , . . . . , , , . . , . . , , , , , , . , . . . . . , . . , , . , , . , , . , . . . . . , . . . . . . . . , . . , . . , .. 46
6,3,1 General.,."""".".""",."",..,..,..",....".,.....,..".".",.,..".,........"..,..., 46
6,),2 Application""""".".."",.",.",.,..,.,.,.",.,....."."."."",.....,.,.,.,..,...,.... 46
6,),) Methodology""""..",."""".,.."..,..""""........".,.."."."....,."...,."..... 46
6,4 Impact Loads""".".""" """ ".........."",.".",."".,.....",.,........,....",..,.,.., 49
6.4 " General."."..."".",."..,."..,.,.,.",.".,.,.."..."..,.,.."....,.....".....,.,..,.... 49
6.4,2 Application,."..",.,.,.,.,."".".".""".,..,..".,.."...,.",....,.....,.....".."."" 49
6.4,3 Methodology,..",.,.,..,.",.,...,..".,.".....,.."",....,.,.,.."..,."..,.,...,.".",.,. 49
6.5 Erosion Forces,..,."."",.,."""."..",.,.",.,."..,......".,..,.",."..,...,......".",.., 50
6,5,' General""".""."",.".,.""..,.."""."".."",.."........"..,..,..,....,.".."..,. 50
6.5.2 Application"""..""""..,.."."...,.""" ",."."..",.......,.".......",...........,. 50
6,5,3 Methodology."",.",.,."."",.,..",.,..."".",."....,.....,.,...,.".."..,..,...".,.. 52
6,5,3,1 Structures at Ground Level...".. "",..""""".,.....",..,....."...,.,.",.,......,.,.. 52
6,5.3.2 Piers, Piles, Posts and Walls, ,., " ,., ,., ,., ". " " ., , ... , ., , , " .. , '" ...., , .., ,. , ..... ,.... ,.. 52

6,5,3,) Fill Embankments."",."" _ . , . , , , , . , . . . , , , . . , . , , . , , , . , , , , , . , . . , , , , , , , . , , . . . , , , . . . , , , . , - . . , 54
6,6 Embankment Stability, , , , , . . , . , , , . , . , , , , , . , . , , , , , , , , , , , , . , , . . , . . , . . , ,'. , , . , , . , , , , . . . . , , , . , , . , . . . . , , " 54
6.7 Discussion,.,..""..,."..,.."",.,."".,....".,.,.,.....", _,. , " , ...,. , ,.. ,., ,..' . , ..,. , ,..... 56
VII. DESIGN CRITERIA FOR STRUCTURES

7,1 General."....""""",.".",.""..,.."..,.""",.,.."..,.,..",."",...",..."..,.."..,.. 5 7
7,2 Elevated Structures,."" ,. " , , , " ,. . , ,. , ., "., ... , .. ". "..' ,_, ,., ,.. ,., ." "., ...... .. .....' , "" ., 57
7.2,' On Fill., , . , , , ". , ,. , .. " , ,.,.,. , ... , " , .' , ...,., ,., ". ..,., , ,.,., ,., , .. , '" , ..,. , .. ...,.' ,.,. ,., 57
7,2,2 On Stilts, , ", , ,. , " , '" " . " '" , " , , , , ,., , ., "., ." ,. , ,., ., , ,..., , " ,., ,.. . .' ... ,.. ,., ,. ... ".., 58
7,2,2,1 Posts and Piles.""",.".".".".."",.."".."",..,....,.....,..,.,......."......,." 58
7.2,2,2 Piers"..""",...",."""",.",."",."."",...,.,.",.""""".,."...."..,.."." 61
7,2 Waterproofed Structures. " .. , ",.. "... .,., " , , . , , , , , " , ,. , " , " , , ,. , ,. , " ".,.. ......., ,.. , .. ,.. .. 62

7,),1 General"""""..""""..".,."",."".""".,..,.",."....",."".,."..,.".",.,..,. 62
7,3,1 Anchorage",.",.,.""",.,..,..."."""",."..".,."."......,.,...,.,....."",..,.,.", 63
7,3,3 Waterproofing."""""..""""",.,.""""..".".".",.,..".,..,....".........",..., 65
7.4 Levees ,. , , , , , , , , ,', , , , , , , , , , , . , , , , , , , , , . , , . , , , , , . , , , , . . , . , , , . , . , , , . . , . , , , , , , , , . . . . . . , , , , . , , . , , . , . , .. 68
7,5 Floodwalls",..".".""""."'."""'.....,."'.,..,......,.,...,."'."."......"""."...,., 70
VIII. CLOSURE OF OPENINGS

8,1 Introduction""",.",.""""."..,.."."",.,....,...,..""...,..".,..",....,..,..,.,.,..... 71
8,2 Material for Shields" , . . , . , , . . , , . . , . , , . . . , . , , , , , . , . . . . , , , , , , , , , , , . , , , , . , . , , . . , , . . . . , . . , . , . . . . , . . . . .. 71
8,3 Installation of Shields, , "., ,. , ,., , , ",., ,. , , . , , ,., ,.. ,.,., .., .'.. " " , "., , ,. .'.' ...",. , '" . " ,.. ,. 71
8.4 Illustration of Closure Types, . , , , . , , , , . , , . . , , . , , . . , , , , . . , . . . , . , . . . , , , . . , . , , , , , , . , . . ;', . . , . , . . , . . , , . , ., 72

IX. INTERNAL FLOODING

9,' Introduction."".,.,..""..".""".,."..""".,."...".."",.,.""""".,."".....".".. 81
9,2 Implementation Considerations,.".,..".",., " , , . , ... , .. ". " , " ,.. ,., , ,. ".. .. ,.., ,., ,., " , ,..,.. 81

9.3 Insurance Considerations"..",.".,.", ",.., ,."",.""",.",.,....",.',..'"""..,..'."..,., 82

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