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<br />in the study are the incorporated Towns of Bow Mar, <br />Cherry Hills Village, Columbine Valley, Deer Trail, <br />Glendale, Greenwood Village, Sheridan, and the Cities <br />of Aurora, Englewood, and Littleton. The area of the <br />study is shown on the Vicinity Map (Figure 1). <br /> <br />. <br /> <br />The county lies within the South Platte River Basin, <br />with headwaters extEmding into the Rocky Hountains <br />to elevations of 14,000 feet. The waters of the South <br />Platte River have been appropriated for municipal <br />and irrigation usage. The South Platte River in Arapahoe <br />County flows from south to north along the western <br />edge of the county. <br /> <br />,~ <br /> <br />In addition to the South Platte River, 21 tributary <br />streams are included in this study, all generally <br />flowing from south to north into the South Platte River. <br />The tributary streams studied in detail include Big Dry <br />Creek, Little Dry Creek, Cottonwood Creek, Cherry Creek, <br />Piney Creek, Sand Creek, Coal Creek, Murphy Creek, Box <br />Elder Creek near Watkins, Comanche and Little Comanche <br />Creeks near Strasburg, and West Bijou Creek near Byers. <br /> <br />The tributary streams studied using approximate methods <br />include the upper reaches of Piney Creek and Coal <br />Creek, Lone Tree Creek, Senac Creek, 1-05-4412 Creek, <br />West Box Elder Creek, Box Elder Creek, Kiowa Creek, <br />Wolf Creek, ComanchE: Creek, Little Comanche Creek, <br />West Bijou Creek, Middle Bijou Creek, East Bijou Creek, <br />Muddy Creek, and Deer Trail Creek. No development <br />pressures are foreseen on these streams for the next <br />5 years. <br /> <br />On the South Platte River, just upstream of the City <br />of Littleton, the U.S. Army Corps of EngineE!rS is com- <br />pleting construction of the Chatfield Dam. The primary <br />purpose of the dam is flood control and recreation. The <br />dam is now operational for flood control purposes and, <br />therefore, flood hazards downstream are based on the <br />dam's operation. <br /> <br />~ <br /> <br />All of the defined streams were chosen with consideration <br />given to existing hazards and forecasted development <br />and construction in the next 5 years (through 1980). <br /> <br />.. <br /> <br />3 <br /> <br />........, <br /> <br />I <br />..{jj <br />