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<br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br /> <br />3 <br /> <br />report presents an estimate of the nature and extent of probable <br /> <br />future floods which can be reasonably expected along the studied <br />channels. <br /> <br />and Flood Control District or the Colorado Water Conservation <br />Board to determine whether or not the information in this report <br />has been amendedo <br /> <br />The IOO-year flood plain is shown on the Flood Hazard Area <br /> <br /> <br />Delineation Sheets, which illustrate the areas that would <br /> <br /> <br />be inundated by such an event. Flood profiles show the water <br /> <br /> <br />depths relative to the stream bed. The flood profiles and <br /> <br /> <br />flooded area data presented are based upon future, developed <br /> <br /> <br />conditions in the basin, as determined from current master <br /> <br /> <br />planning maps. Possible future improvements to control floods <br /> <br /> <br />are not a consideration of this report. <br /> <br />Acknowledgments <br /> <br /> <br />The report was prepared by Sellards & Grigg, Inc., Consulting <br /> <br /> <br />Engineers, Lakewood, Colorado, under contract with the Urban <br /> <br /> <br />Drainage and Flood Control District. <br /> <br />The information presented herein does not imply any State <br /> <br /> <br />action to zone or regulate the use of flood plains. The District <br /> <br /> <br />has the authority to regulate flood plains, but to date has <br /> <br /> <br />chasen to leave flood plain regulation responsibility with <br /> <br /> <br />local governments. The report provides a suitable basis for <br /> <br /> <br />the adoption of land use controls to guide flood plain manage- <br /> <br /> <br />ment. <br /> <br />The survey control, aerial photography, topographic mapping, <br /> <br /> <br />and the preparation of the base plan and profile sheets used <br /> <br /> <br />in this report were prepared by Bell Mapping Company, Denver, <br /> <br /> <br />Colorado, under a separate contract with the Urban Drainage <br /> <br /> <br />and Flood Control District. <br /> <br />II GENERAL BASIN DESCRIPTION <br /> <br />Flood water surface elevations and flood plain boundaries <br /> <br /> <br />are often revised by road and bridge construction, flood plain <br /> <br /> <br />development, flood control improvements, or natural processes. <br /> <br /> <br />Prior to utilization of this report for planning or design <br /> <br /> <br />purposes, the user is advised to contact the Urban Drainage <br /> <br />Dry Gulch was at one time a deep natural drainageway which <br /> <br /> <br />collected and conveyed runoff from a natural foothills watershed. <br /> <br /> <br />It has become a channel which must drain a highly urbanized <br /> <br /> <br />watershed, lying predominantly in the City of Lakewood, Colorado; <br /> <br /> <br />the remainder of the watershed lies in the City and County of <br /> <br /> <br />Denver. The overall basin contains approximately 3.7 square <br /> <br /> <br />miles. Dry Gulch and its major tributaries flow in an easterly <br /> <br /> <br />direction from near Youngfield Street to the confluence of Dry <br /> <br /> <br />Gulch with Lakewood Gulch near Perry Street, a basin length <br />