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Last modified
1/25/2010 7:08:53 PM
Creation date
10/5/2006 2:13:52 AM
Metadata
Fields
Template:
Floodplain Documents
County
Mesa
Community
Riverside
Stream Name
Colorado River
Basin
Colorado Mainstem
Title
Section 205 Reconnaissance Report for Flood Control
Date
11/1/1991
Prepared For
Mesa County
Prepared By
US Army Corps of Engineers
Floodplain - Doc Type
Floodplain Report/Masterplan
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<br />. TABLE 4 ~ <br />DAMAGE ANALYSIS SUMMARY - WITHOUT PROJECT <br /> ($l,OOO) <br />Damage Category Flood plain <br /> 10-yr 50-yr 100-yr 500-yr <br />Residential <br />Structures l26 416 679 l,l50 <br />Contents 82 299 494 775 <br />Commercial/Industrial <br />Structures 1 2 13 29 <br />Contents 0 0 8 24 <br />Miscellaneous -21. 169 297 488 <br />Total 262 886 l,491 2,466 <br /> <br />. <br /> <br />. <br /> <br />9. Plan Formulation. <br /> <br />Plan Formulation consisted of evaluating all available <br />measures and then combining the most promising into several <br />alternative flood control plans. <br /> <br />a. Flood Control Measures Considered. - Nonstructural <br />measures considered to alleviate flood damages included zoning, <br />flood warning, emergency floodfight, and flood proofing (both by <br />ring levees and raising structures). Structural measures <br />considered included channel enlargement, diversions, upstream <br />storage, banks ide and setback levees, and floodwalls. <br /> <br />(1) Nonstructural. - Zoning, flood warning, and <br />emergency measures represent the existing conditions of living <br />with the flood threat. The City of Grand Junction already <br />participates in the Federal Flood Insurance Program. It was from <br />this base that local interests requested Federal assistance in <br />investigating other measures to alleviate the flood potential. <br />Accordingly, these measures (already in place) are considered <br />inadequate by the sponsors. <br /> <br />Flood warning and emergency actions have been implemented <br />historically. Snowmelt flood potential can be forecast fairly <br />accurately 1 to 2 months in advance of the peak runoff. However, <br />the problem is in identifying extended periods of warm weather or <br />heavy rains accelerating snowmelt and producing unusually high <br />runoff. This type of problem occurred in 1983 and 1984, which <br />led to flooding along the Colorado River despite the existence of <br /> <br />9 <br />
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