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<br />Dam. <br /> <br />4.15 PLUM CREEK BASIN <br /> <br />Flood Historv. The following accounts illustrate flood potential in the Plum Creek basin. <br /> <br />Flood of September 1933, On 10 September 1933, a cloudburst occurred over the <br />South Platte Paver between Denver and the foothills, with the center over Plum Creek, <br />Little Dry and Big Dry Creek basins. Although information on tributary flows is limited, it <br />was estimate>d that the Plum Creek peak discharge below the confluence of the East and <br />West Branches was about 30,000 cubic feet per second attenuating to about 5,500 cubic <br />feet per second at the mouth. <br /> <br />Flood of 1 6-17 June 1965. The flood of June 1965 is without questions the most <br />disastrous flood event in terms of dollar damage that has ever occurred in the South Platte <br />basin. The Illood was the result of runoff from heavy intense rainfall occurring on the <br />evening of 115 June, centered over the high plains area of the Plum Creek and Cherry <br />Creek basins. Runoff from the Plum Creek area produced a major disaster not only the <br />tributary itsell, but also along the South Platte River through Denver, beginning at the point <br />where Plum Creek empties into the South Platte and extending downstream through <br />Denver and (In below through the rural area along the South Platte River. <br /> <br />4.16 ARKANSAS RIVER <br /> <br />Flood of 1864- The first flood on the Arkansas River for which detailed information <br />has been found occurred June 11, 1864, as a result of the general storm over eastern <br />Colorado. The early settlers agree that this flood reached a point near Third and Santa <br />Fe Avenues in Pueblo, and if, as seems probable, the street has been graded down since <br />1864, the flood of that year may have been nearly as high as the flood of 1921. During <br />the flood of 1!l21 all the streams in the valley were very high and overflowed their banks <br />for great distances. <br /> <br />Flood of 1867. A flood in May 1807 caused the removal of Fort Lyon to a place <br />17 miles farth,ar west. The rainfall record at Fort Lyon was as follows: May 24-26, 1.80 <br />inches; May 29, 1.00 inch; May 30, 1.15 inches; a total of 3.95 inches, as compared with <br />a normal rainfall of 2 inches for the entire month. This flood was probably caused chiefly <br /> <br />Colorado Flood <br />Hydrology Manual <br /> <br />4,22 <br /> <br />fRI'FT <br />