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<br />1.3 Coordination <br /> <br />On October 13, 1983, Dames & Moore was instructed by FEMA to proceed' <br />with an existing data study for Ouray COunty, Colorado, using the <br />study data from the Ouray County FPI. <br /> <br />In preparing the OUray County FPI, the Colorado Water Conservation <br />Board and the U.S. Geological Survey (USGS) were contacted to obtain <br />flow records for the Uncompahgre River. Additional information <br />and data used in the FPI were provided by the Colorado State <br />Department of Highways, the National Oceanic and Atmospheric Admin- <br />istration, the U.S. Soil Conservation Service, the OUray Herald, <br />the Montrose Daily Press, and the Ouray County Plaindealer. <br /> <br />The final coordination meeting was held on August 14, 1984, and <br />was attended by repres~tatives of FEMA, the study contractor, the <br />city, and the county. No problems were raised at the meeting. <br /> <br />2.0 AREA STUDIED <br /> <br />2.1 Scope of Study <br /> <br />This Flood Insurance Study covers the unincorporated areas of OUray <br />COunty, Colorado. The area of study is shown on the Vicinity Map <br />(Figure 1). <br /> <br />Flooding caused by the Uncompahgre River was studied in detail <br />from COunty Road 24 upstream to the corporate limits of the City <br />of OUray, Colorado, a distance of approximately 12.5 miles. The <br />Uncompahgre River West Arm was studied in detail from its point of <br />divergence from the Uncompahgre River, downstream to the point <br />where it rejoins the main channel flow. <br /> <br />The areas studied by detailed methods were selected based on the <br />extent and validity of available hydrologic and hydraulic data. <br /> <br />Dallas and Pleasant Valley Creeks were studied by approximate <br />methods. Dallas Creek was studied from its confluence with the <br />Uncompahgre River to a point approximately 5.7 miles upstream. <br />Pleasant Valley Creek was studied for a distance approximately 3.9 <br />miles upstream from its confluence with Dallas Creek. Cascade <br />Creek was also studied by approximate methods from its confluence <br />with the Uncompahgre River to a point approximately 2,650 feet <br />upstream. <br /> <br />Approximate analyses were used to study those areas having a low <br />development potential or minimal flood hazards. <br /> <br />2 <br />