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<br />I, <br /> <br />~~ <br /> <br />. <br /> <br />. <br /> <br />For Immediate Release <br /> <br />.I' <br /> <br />Project Status <br /> <br />March 2, 1978 <br /> <br />Floodplain Information Report <br />Uncompahgre River and Gunnison River <br />. in Delta County, Colorado <br /> <br />Background <br /> <br />State law charges,the Colorado Water Conservation Board (CWCB) <br />to "designate" and "approve" all flood hazard area studies before <br />local governments can legally regulate floodplains in their juris- <br />diction. Under the law, accurate floodplain information for desig- <br />nated and, approved storm or floodway runoff channels is then made <br />available to county and municipal governments. The local governments <br />can then establish their own zoning regulations to control land use . <br />in.thefloodplain with the objective of lessening or avoiding the <br />haiards to. persons and damage to property. <br /> <br />There are presently no definitive floodplain studies of the <br />Uncompahgre and Gunnison Rivers in Delta County except for large <br />scale floodprone area maps prepared using approximate methods by the <br />U.S. Geological Survey and the Delta County Planning Department. <br />Delta County is presently experiencing rapid growth and accurate <br />knowledge of the 100-year floodplain elevations and boundaries is <br />necessary for effective floodplain management practices. <br /> <br />Project Description <br /> <br />The objective of the study is to determine the 10-, 50-, 100-, <br />and 500-year frequency flood elevations along the Uncompahgre River <br />and Gunnison River in the vicinity of Delta, Colorado. The floodplain <br />shall be delineated by the Sacramento District of the U.S. Army <br />Corps of Engineers on maps furnished by the County, in cooperation <br />with the CWCB. The CWCB shall document the study by publishing a <br />floodplain information report. <br /> <br />The study reach along the Uncompahgre River begins at its con- <br />fluence with the Gunnison River and extends approximately 7 miles <br />upstream to the Delta-Montrose County line. The drainage basin of <br />the Uncompahgre River at Delta is approximately 1,129 square miles. <br /> <br />The study reach along the Gunnison River begins about 5 miles <br />below Delta near the confluence with Roubideau Creek and extends <br />upstream approximately 13 miles to a point approximately 1 mile above <br />Austin, Colorado. The drainage.basin of the Gunnison River at Delta <br />is over 5,300 square miles. <br /> <br />Detailed topographic maps, on a scale of 1" = 200' and 2' <br />contour intervals, are available of the entire study reach. The <br />