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FLOOD05505
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Last modified
1/25/2010 6:49:25 PM
Creation date
10/5/2006 1:36:42 AM
Metadata
Fields
Template:
Floodplain Documents
County
Gunnison
Community
Gunnison County
Stream Name
Gunnison River, Tomachi Creek
Basin
Gunnison
Title
Floodplain Information Report
Date
12/1/1976
Prepared For
Gunnison County
Prepared By
ECI
Contract/PO #
&&
Floodplain - Doc Type
Floodplain Report/Masterplan
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<br />II <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />II <br />~ <br /> <br />Therefore, upon official approval of this report by the <br /> <br /> <br />Colorado Water Conservation Board, the areas described as being in- <br /> <br />undated by the 100-year flood (Intermediate Regional Flood) 11 can be <br /> <br /> <br />designated as flood hazard areas and their use regulated accordingly by <br /> <br /> <br />the local agencies. <br /> <br />Purpose and Scope <br /> <br />The purpose of this report is to provide the City of Gunnison <br /> <br /> <br />and Gunnison County officials with a tool for planning purposes and to <br /> <br /> <br />regulate the land use of areas within the floodplain of Gunnison River <br /> <br />and Tomichi Creek in order to minimize flood damages and dangers to both <br /> <br /> <br />the property and human life. The report contains information on histor- <br /> <br /> <br />ical floods in the study reach, existing basin and channel parameters <br /> <br /> <br />influencing the flood hazard, and information related to the 10-, 50-, <br /> <br /> <br />100- and SOD-year frequency floods. <br /> <br />The report presents flooded area maps delineating the extent <br /> <br /> <br />of the 100-year flood, water surface profiles, and typical floodplain <br /> <br /> <br />cross sections showing the water surface elevations for the 10-, 50-, <br /> <br />100-, and SOD-year floods. Supplemental information depicting the <br /> <br /> <br />backup data and calculations for the hydrologic and hydraulic analysis <br /> <br /> <br />are presented in the Technical Addendum. This information is useful for <br /> <br /> <br />planning, designing and implementing land use activities within the <br /> <br /> <br />study area. <br /> <br />Acknowledgments <br /> <br />We wish to acknowledge the assistance and cooperation of the <br /> <br /> <br />agencies, firms, organizations and individuals listed on the following <br /> <br /> <br />page. Many city and county officials and private citizens provided much <br /> <br />information that was essential to the understanding of the flooding <br /> <br /> <br />problems in the study area. The efforts of all those who contributed to <br /> <br /> <br />this study are appreciated. <br /> <br />lIThe terms "Intermediate Regional Flood", "100-Year frequency flood" and <br />"one percent chance flood" can be used interchangeably as they are de- <br />fined by the same type of flood event (See Glossary). However, for <br />consistency, the term "100-year flood" will be used exclusively through- <br />out this report. <br /> <br />5 <br /> <br />r', <br /> <br />,- <br />
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