FLOOD02650

• County: La Plata
• Stream Name: Animas River
• Basin: San Juan/Dolores
• Title: Hydrology Addendum to FIS La Plata County Unincorporated Areas
• Date: 5/21/2002
• Prepared For: La Plata County
• Prepared By: Montgomery Watson
• Floodplain - Doc Type: Floodplain Report/Masterplan

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TABLE OF CONTENTS

Page

INTRODUCTION. . . . . . . . . . . , . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1

1.1 Purpose of Study.................................................1
1.2 Coordination. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1
1.3 Authority and Acknowledgments. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1

AREA STUDIED...........................................................2

2.1 Scope of Study................................................... 2
2.2 Community Description............................................2
2.3 Principal Flood Problems......................................... 5
2.4 Flood Protection Measures........................................7

ENGINEERING METHODS.................................................... 7

3.1 Hydrologic Analyses. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8
3.2 Hydraulic Analyses..... . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9

FLOOD PLAIN MANAGEMENT APPLICATIONS...................................12

4.1 Flood Boundaries............................................... .12
~ . 2 F1oodways. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13

INSURANCE APPLICATION................................................. 30

5.1 Reach Determinations............................................ 30
5.2 Flood Hazard Factors............................................ 30
5.3 Flood Insurance Zones........................................... 33
5.4 Flood Insurance Rate Map Description............................34

OTHER STUDIES......................................................... 34

LOCATION OF DATA...................................................... 34

BIBLIOGRAPHY AND REFERENCES.......................................... .35

REVISION DESCRIPTIONS................................................. 37

9.1 First Revision.................................................. 37
9.2 Second Revision............................................,.... 38

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