FLOOD01734

• Designation Number: 563
• County: Grand
• Community: Hot Sulphur Springs
• Title: Flood Hazard Boundary Map - Hot Sulphur Springs, Grand County, CO
• Date: 10/1/1975
• Designation Date: 5/2/2002
• Floodplain - Doc Type: Floodplain Report/Masterplan

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PREFACE

This Floodplain Information Report (FIR) is part of a program by the Colorado Water Conservation
Board (CWCB) to make approximate floodplain maps prepared by the Federal Emergency
Management Agency (FEMA) easier for local governments to use. This CWCB report provides
limited engineering information to support the approximate delineations on the FEMA maps, and it
provides floodplain management information to guide the local governments in the use ofthe maps.

The official floodplain information for the Town of Hot Sulphur Springs is the Flood Hazard
Boundary Map (FHBM), dated October 17, 1975. The FHBM was prepared by Federal Insurance
Administration (now FEMA) and contains only approximate floodplain delineations. The
approximate floodplains do not include any engineering information to describe the basis of the
approximate floodplain mapping. In addition, since the map was developed, the Town limits have
expanded and new floodplain delineations need to be added to the map, The initial purpose of this
report, therefore, is to provide the town with limited supporting information for the approximate
floodplain delineations, This FIR includes a description of available hydrologic information for
major flooding sources within or adjacent to the town. In addition, the FIR gives the town some
basic information about floodplain management and it provides some alternatives that could be
considered in formulating and implementing floodplain management objectives_

A second function of this report is to assure that the FHBM meets the basic technical requirements
for designation and approval by the CWCR Without the inclusion of basic engineering
information, the approximate floodplain delineations shown on the Town of Hot Sulphur Springs
Flood Hazard Boundary Maps (FHBMs) cannot qualifY for CWCB designation. Colorado statutes
require that local governments obtain from the CWCB the designation and approval of floodplain
information for its use in regulatory purposes, This FIR provides a means for the FHBMs to meet
that statutory objective. As new and more detailed floodplain information becomes available, the
approximate floodplain areas shown on the FHBM panels will become superseded_ The CWCB
will designate and approve new information, and rescind old information as appropriate. As part of
this study, Heimbaugh Creek was analyzed and a 100 year floodplain was estimated using the
regional regression analysis.

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