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<br />CONSISTENCY WITH PREVIOUS FLOODPLAIN STUDIES <br /> <br />WHEREAS, the detailed floodplain information for Plum Creek and East Plum Creek revises and <br />is, therefore, inconsistent with the detailed and approximate floodplain information for Plum Creek and <br />East Plum Creek contained in Resolutions No. 164,290,428,501, and 558; and <br /> <br />WHEREAS, all Letters of Map Amendments (LOMA's), Letters of Map Revisions Based on <br />Fill (LOMR-F's), and Letters of Map Revisions (LOMR's) approved by FEMA prior to August, 2004 <br />but not designated by the CWCB were based on floodplain information superseded by, and therefore <br />inconsistent with, the new report dated August, 2004 for Douglas County; and <br /> <br />COMPLIANCE WITH CWCB TECHNICAL STANDARDS <br /> <br />WHEREAS, said new report is based on hydrologic information developed as part ofFEMA's <br />Flood Insurance Study for Douglas County; and <br /> <br />WHEREAS, water surface elevations for the 10-,50-, 100-, and 500-year flood frequencies for <br />the studied stream reach were computed for said new report using the U.S. Army Corps of Engineers <br />HEC- RAS hydraulic model, Version 3.1.1; and <br /> <br />WHEREAS, floodway limits for the 100-year flood frequency assuming both a I-foot <br />maximum rise, as defined by FEMA, and a 0.5 foot maximum rise, as defined by UDFCD, were <br />computed for said new report using the U.S. Army Corps of Engineers HEC-RAS hydraulic model, <br />Version 3.1.1; and <br /> <br />WHEREAS, the detailed floodplain and floodway information for Plum Creek and East Plum <br />Creek in said new report meets the requirements listed under the Board's "Rules and Regulations for <br />Regulatory Floodplains in Colorado" (2 CCR 408-1); and <br /> <br />WHEREAS, Douglas County and the Urban Drainage and Flood Control District should <br />continue to regulate new development and construction in floodplain areas on a case-by-case basis <br />based on the infonnation presented in said new report, or based on the best available floodplain <br />infonnation that is accessible to the County and the District; and <br /> <br />DESIGNA TION. APPROVAL AND RESCISSION ACTION <br /> <br />NOW, THEREFORE, BE IT RESOLVED by the Colorado Water Conservation Board in <br />regular meeting assembled in Alamosa, Colorado, this 14th day of September, 2004 that it does hereby <br />designate and approve as detailed floodplain information the 100-year floodplain, I-ft floodway, and <br />0.5-ft floodway delineations for Plum Creek and East Plum Creek in Douglas County contained in said <br />new Flood Hazard Area Delineation dated August, 2004; and <br /> <br />3 <br />