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<br />IJ'" <br />~ t 1 .... <br />V~ <br /> <br />. <br /> <br />2 <br /> <br />South Platte River, Sear Creek, Clear Creek, St. Vraln Creek, and <br />the Big Thompson and Cache La Poudre Rivers. These streams head <br />along the Continental DIvide. Tributaries that drain lower eleva- <br />tions are Plum, Cherry, Boxelder, Kiowa, BIJou, Badger, and Beaver <br />Creeks from the south; Lonetree, Crow, Wildcat, Pawnee, Cedar, and <br />Lodgepole Creeks from the north. <br /> <br />Elevations of the South Platte River drainage area range from about <br />2,800 feet near the mouth of the South Platte River to 14,000 feet <br />on the ContInental DivIde. <br /> <br />Since the turn of the century, Irrigation diversions and ImportatIons <br />of water have greatly altered the flow of the South Platte River. <br />There are ~5 diversIons from the river between Kersey, Colorado, and <br />the Colorado-Nebraska State line, and 16 systems that Import water <br />Into the South Platte River Basin. During the period from 1952 to <br />1963, streamflow records for the South Platte River at the Narrows <br />Dam site show a maxImum dIscharge of 14,200 second-feet and a minimum <br />discharge of 43 second-feet. The high floods of.1965 far exceeded <br />these amounts when Plum Creek and BIJou Creek alone exceeded 150,000 <br />and 446,000 second-feet, respectIvely. <br /> <br />Soils of the.valley range from sandy loams to dark sllty-clay loams. <br />... ThIs materIal overlies older stream-deposited sand and gravel. <br /> <br />The clImate In the vIcinity of the proposed Harrows ReservoIr Is <br />characterized by low relative humidIty, light raInfall, warm summers, <br />cold winters, considerable wind, and large varIations In annual <br />precipItation. Over a 72-year perIod of record, the average annual <br />precipItatIon at Fort Morgan was 12.9 Inches. The average frost-free <br />season Is about ISO days, with the last killing frost In the sprIng <br />occurrIng about Hay I and the first kIllIng frost In the fall about <br />October 1. <br /> <br />The project area.ls readIly accessIble. An Interstate hIghway, <br />U. S. highways, state hIghways, and a network of townshIp and <br />county roads serve the area. <br /> <br />Agriculture Is the principal Industry of the project area. Prin- <br />cipal crops are sugar beets, alfalfa, corn, beans, potatoes, and <br />small graIns. DaIry and beef cattle are the principal livestock <br />raised on the farms. <br /> <br />The total populatIon of Logan, Horgan, SedgwIck, and WashIngton <br />CountIes In 1960 was 52,361. It represents an Increase of about <br /> <br />. <br />