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<br />FLOOD HISTORY <br /> <br />Since 1844 nineteen floods have occurred on the South Platte River <br /> <br />in the Denver reach. A tabulation of flood dates and the peak discharges <br /> <br />. <br /> <br />in the Denver reach is given below. <br /> Peak Discharge Peak Discharge <br />Date c.f..s. Date c.f.s. <br />May 1957 24,000* July 1912 12,000* <br />June 1949 8,850 June 1894 14,000* <br />May 1948 15,000* May 1885 20,000* <br />June 1947 5,670 May 1876 Not recorded <br /> or estimated <br />August 1945 5,720 May 1867 Not recorded <br /> or estimated <br />April-May 1942 10,700 June 1864 Not recorded <br /> or estimated <br />May 1935 12,300 May 1864 Not recorded <br /> or estimated <br />September 1933 22,000 May 1864 Not recorded <br /> or estimated <br />August 1933 15,000* 1844 100,000* <br />,Tune 1921 8,790 <br />*Estimated <br /> <br />URBAN GROWTH AND STORM RUNOFF <br /> <br />Figure 4 illustrAtes how trends in population growth for metropolitan <br /> <br />Denver will increAse urban land requirements, and how the volume of storm <br /> <br />runoff from the urbanized area is expected to increase. With increased <br /> <br />runoff from urbAn growth, floods'may occur in the future from rainfall <br /> <br />I - <br /> <br />quantities which under rural watershed conditions did not produce flood <br /> <br />stages in the river. These trends demonstrate that adequate allowances <br /> <br />must be made to prevent flood plain encroachments into areas of potential <br /> <br />future flooding. <br /> <br />6 <br />