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<br />1.3 Coordination <br /> <br />AS a result of correspondence between the Regional Office of FEMA. <br />the Colorado Water Conservation Board, and the Town of Ridgway, it <br />was requested that a Flood Insurance Study be prepared for Ridgway. <br /> <br />2.0 AREA STUDIED <br /> <br />2.1 Scope of Study <br /> <br />This Flood Insurance Study covers the incorporated areas of the <br />Town of Ridgway, Ouray County, Colorado. The area of study is <br />shown on the Vicinity Map (Figure 1). <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 />Uncompahgre River was studied in detail for the lower limit at the <br />County Road Bridge, 1.8 miles downstream from the Town of Ridgway <br />which coincides with the southern edge upstream of the proposed <br />Ridgway storage reservoir of the Dallas Creek project. <br /> <br />Approximate analyses were used to study those areas having a low <br />development potential or minimal flood hazards. <br /> <br />2.2 Community Description <br /> <br />Ridgway is located in west-central Ouray County, in southwestern <br />Colorado and is bordered by unincorporated areas of Ouray County. <br />Ridgway lies in a broad valley at the intersectlons of U.S. Highway <br />550 and State Highway 62. Ridgway is 91 miles from Gunnison, 85 <br />miles from Grand Junction, 80 miles from Durango, and 108 miles <br />from Cortez. The town itself encompasses approximately 480 acres. <br /> <br />The U.S. Bureau of the Census indicates that the population of <br />Ridgway in 1980 was 369 (Reference 2) with a growth increase every <br /> <br />year. <br /> <br />Uncompahgre River is located in southwestern Colorado approximately <br />70 miles east of the western boundary of Colorado. The headwaters <br />rise on the northern slopes of the San Juan Mountains west of the <br />Continental Divide at elevations higher than 13,000 feet. The <br />river then flows northwesterly through Ouray, Montrose, and Delta <br />Counties for approximately 70 miles to its confluence with the <br />Gunnison River near the City of Delta. Uncompahgre River drains <br />approximately 1,100 square miles at its confluence with the Gunnison <br />River and contributes an annual average of approximately 200,000 <br />acre-feet of water to the Gunnison River. <br /> <br />The climate is characterized as semiarid, but rainfall and temper- <br />ature vary widely. Average annual precipitation ranges from <br /> <br />2 <br />