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<br />A literature search on flooding in the San Migue'j RivH Basin <br />determined that a study is currently in progress under the juris- <br />diction of the Federal Insurance Administration (FIA) of the <br />Department of Housing and Urban Development. Th'is study is being <br />financed by federal and state funds under the control of the <br />Colorado Water Conservation Board, and is being conducted by MSM <br />Consultants, Inc., of Denver, Colorado. <br /> <br />The MSM flood plain study commences at the populated areas a'long <br />the San Miguel, (Section 15 as shown on drawing ,'44-2049 in the <br />Appendix of this report), and therefore could not provide any <br />water surface elevation information at the Club Ranch Ponds "each. <br />Although the flood study including hydraulic analyses has yet to <br />be completed in the Uravan area, a hydrologist with the Federal <br />Insurance Administration has approved the hydrologic portion of <br />the study. Correspondence with MSM has provided the peak flood <br />flows of the 10, 15, 100 and 500 yea r frequency events. To put <br />these frequencies in perspective, the Colorado State Department <br />of Highways uses the 100 year flood to size river crossings on <br />the Interstate System in urban areas. Therefore, Dravo re- <br />commends using the peak flood flows from the FIA source to ensure <br />compatibil ity with the soon-to-be released flood plain study. A <br />copy of the FIA letter of approval is in the Appendix of this <br />report. <br /> <br />3.2 Hydrology <br /> <br />3.2,1 Climate and Flood Characteristics <br /> <br />The San Miguel River Basin climate is typical of most of Colorado's <br /> <br />6 <br />