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<br />000628 <br /> <br />.. <br /> <br />. <br /> <br />. <br /> <br />North Platte River includes 667 river miles of channel from North <br />Platte, Nebraska, to the headwaters, and the river elevation rises from <br />2750 MSL to 8000 MSL. The South Platte River includes 450 river miles <br />of channel from North Platte, Nebraska, to the headwaters; and the river <br />elevation rises from 2750 MSL to 12,500 MSL (Platte River Profiles, <br />U.S. Engineer Office, September 1931). <br /> <br />Because of the diverse topography and continental location, a wide <br />variety of climatic conditions exist. In general, average anrual <br />precipitation increases from about 10 inches in the western basin to <br />about 24 inches in the eastern part of the basin. The high mountains of <br />Colorado and Wyoming are exceptions as precipitation in these areas <br />averages as much as 40 inches mostly in the form of snowfall. The <br />plains portion of the basin receive~ precipitation in the form of <br />snowfall in the winter and shower and thunderstorms in the spring and <br />summer. The basin experiences many weather extremes. <br /> <br />c. Previous Investiqations <br /> <br />Platte River Basin studies include basin wide studies, project <br />development studies special project studies, special reports, and the <br />Platte River Management Joint Study. The following are basin-wide <br />studies: <br /> <br />1. Platte River basin studies, Lower 1951; South Platte, 1959; and <br />North Platte, 1957, Bureau of Reclamation. <br /> <br />2. Platte River Level B, 1973-1975, Missouri River Basin <br />Commission. <br /> <br />3. Missouri River Water Accounting System, 1983, Missouri Basin <br />States Association. <br /> <br />4. Upper Platte River Basin, September 1983; Fish and Wildlife <br />Service, U.S. Geological Survey, and Bureau of Reclamation. <br /> <br />Reclamation Project Planning Reports and Design and Construction Reports <br />are available for the North Platte Project, Kendrick Project, Kartes <br />Unit, Glendo Unit, Colorado-Big Thompson Project, Prairie Bend Unit, and <br />Narrows Unit. Some of these reports include Environmental Statements <br />with Endangered Species biological assessments and Fish and Wildlife <br />Coordination Act reports. Special Project Reports, such as Small Loans <br />and Rehabilitation and Betterment Programs, are available for Central <br />Nebraska Public Power and Irrigation District E-65, Elwood Reservoir <br />Project, and the North Platte Project. Reports also include numerous <br />Service reports on fish and wildlife resources in the basin (see August <br />30, 1988, memorandum from the Service State Supervisor at Cheyenne, <br />Wyoming, to the Platte River Coordinator, Grand Island, Nebraska). <br />Other special reports include: <br /> <br />3 <br />