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<br />. <br /> <br />. <br /> <br />. <br /> <br />. <br /> <br />Agenda Item 4a,b,c,d <br />May 12, 1995 <br />Page Five <br /> <br />approximate information that was previously designated by the CWCB but which <br />does not meet the CWCB's current technical standards for approximate <br />information. That approximate information was reviewed. As was the case on the <br />White River, new analyses were performed by the CWCB. <br /> <br />Most of the reach within unincorporated Mesa County was not previously. For <br />approximately 20 of the 22 stream miles in Mesa County the CWCB performed <br />new analyses to delineate the flood boundaries. Near the downstream limit of <br />study, in the vicinity of the confluence with the Colorado River, there was existing <br />detailed information for approximately 2 stream miles. For approximately 1.5 <br />stream miles there was detailed information from a report prepared by the Corps <br />of Engineers. For the final 0.5 mile there is detailed information from the FEMA <br />study for unincorporated Mesa County. All of this detailed information was <br />previously designated by the eWCB. It was used to generate approximate <br />information for Volume III. <br /> <br />The designation of this report will make the most current and most technically <br />acceptable approximate floodplain information legally available to Delta County <br />and Mesa County. It will not conflict with the previous designation of detailed <br />information for Delta County, the City of Delta and Mesa County. It will, <br />however, supersede the previous designation of approximate information for Delta <br />County, for the Gunnison River only. <br /> <br />Item 4d <br /> <br />FPR 95-404 - Floodplain Information Report, Colorado River Mainstem from <br />Rifle to the Utah Stateline, Volume IV <br /> <br />Volume IV includes approximately 36 stream miles from Rifle to the upstream end <br />of DeBeque Canyon that have already been studied in detail by the Corps of <br />Engineers but which have not been designated by the CWCB. When it is <br />designated by the CWCB, that information will supersede the currently designated <br />detailed FEMA information for the City of Rifle. It will be consistent with the <br />currently designated detailed FEMA information for the Town of Parachute. That <br />detailed information from the Corps of Engineers was used to develop approximate <br />information for Volume IV. <br /> <br />There was no existing information, approximate or detailed, for the reach in <br />DeBeque Canyon (approximately 12 stream miles). It was studied by the CWCB <br />using new hydrologic and hydraulic analyses. Starting at the downstream end of <br />DeBeque Canyon is another reach of approximately 28 miles from Palisade to <br />Fruita that has been studied in detail by FEMA and which has been designated by <br />