FLOOD07945

• Designation Number: 563
• County: Grand
• Community: Hot Sulphur Springs
• Basin: Colorado Mainstem
• Title: Floodplain Information Report
• Date: 5/1/2002
• Prepared For: Hot Sulphur Springs and CWCB
• Prepared By: Montgomery Watson Harza
• Floodplain - Doc Type: Floodplain Report/Masterplan

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TABLE OF CONTENTS

PREFACE .,..,..'....,..,..,..,.,..".,...,..,..,..,..,..,..,.......,.....,..,..,...........,...,...........,.......,.....,.....,..,..,........,.2

TABLE OF CONTENTS ........,..,.,......,..,.......,..,..,.....,.....'.........,..,..,..,.....,..,..,..,..,..,..,..,........,........3

INTRODUCTION.,.....,..,.....,..,..,..,..".,..".,..,..,..,..,..,..,..,..,..,..,...,..,..,..,..,..,..,..,..,..,..,..,.....,..,..........4

Purpose and Scope ,..,.....,..,..,........,..,..,..,..,.....,...............,..,..,..,..,..,.....,..,..,...,.,...,..,..,.........4

Authorization ... ... ... ...,.. ....."..,.. ....., ....., ....., ... ... ...,.. ...,.. ...,.., ....., ... ... ... ... ...,.. ...,..,..,.. ...,.. ...,...4

STUDY AREA DESCRIPTION ,.,...,..,..,..,..,.....,...........,............,.....,.....,..,.....,.....,...,...........,........5

Community Description.,.., ...,..,..,.. ...,.. ...,..,..,.. .... ... ... ... ...,.., ....., ... ... ...,..,.. ...,..,..,.., ... ... ... ... ..5

Watershed Description,...,."..,..,..,..,..,..,..,..,..,..,............,..,..,.........,.....,..,..,..,..,..,.................5
Flooding Problems and Flooding History ..,.....,...,.....,..,...,..,..,..,..,..,.........,..,..,..,..,..,..,..,....5

Previous Studies.......,..,..,..,...,..,..,..,..,.....,..,.........,..,.....,...,..,..,..,......,........,..,..,..,.....,.......... 5
Community Response to the CWCB Designation and Approval Process ...........................5

Hydrologic Analysis.,..,.."."..,..,..,..,..,..,.."..,..,..,..,.., ...,.. ...,.., ....., ,..,..,..,..,..,..,..".. ...,..,.. ... ... ,6
Hydraulic Analysis,..,..,.........,..,..,..,..,..,.........,..,..,..,...,..,.....,.........,..,..,..,.....,............,........, 7

Floodplain Mapping.,..,...,..,..,..".,..,..,..,...,.....,..,.....,...,...............,..,........,............................ 7

FLOODPLAIN MANAGEMENT ."..,..,..,..,..,.....,..,..,............,..,..,..,.....,...,..,..,..,..,..,.....,..,.....,..,..,.8
Local Ordinance Requirements.,..,..,..,..,..,..,.....,.........,..,..,..,.....,...,..,..,..,..,...........,..,..,.......8

Flood Insurance,..,..,..,..,......,..,..,..,..,..,..,..,..................,..,..,..,.........,.....,.....,..,.....,..,..,..........8
Floodplain Management Alternatives ,.....,..................,..,............,..,..,..,........,......................8

APPENDIX ...,....,..,.....,..,..,..,..,....,..,..,..,..,..,..,..,..".....,..,..,..,..".,...,..,..,..,..,..,..,..,...,.,.........,..,.......1 0

Figure I, Study Area Location Map
Figure 2. Town of Hot Sulphur Springs
Memo concerning Community Response
Currently Effective FEMA Flood Hazard Boundary Map
Map of Heimbaugh Creek with Flow Worksheets of Cross Sections
CWCB Floodplain Information Warehouse print out for the Town of Hot Sulphur Springs
field Reconnaissance Report
CWCB Hydrology Worksheets
USGS Gage Station Peak Flow Analysis

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