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<br />Boulder Creek, and St. Vrain Creek. <br />. Flood of 1921. Heavy rainfall over much of the upper <br />South Platte River basin caused flooding in Weld County in early <br />June. Between Brighton and Orchard, the wooden bridges were <br />impassable; two were destroyed and the approaches to the others <br />were destroyed for a distance of several hundred yards. At Fort <br />Morgan, the water surface crest was comparable to that of the <br />flood of 1894. The discharge of this flood at Kersey and at <br />Balzac was the largest ever recorded at that location except for <br />the flood of May 1973 and the flood of June 1965, respectively. <br />Flood of 1935. Rains of cloudburst intensity over the <br />basins of the plains tributaries to the South Platte River east <br />of Denver occurred on 30-31 May following the wettest May in <br />Co lorado in 48 years. I t was reported that a "veri tab Ie wall of <br />water" appeared on Bijou Creek about 4 miles upstream from its <br />confluence with the South Platte River. The flood crest reached <br />Fort Morgan on 31 May and was reported to be 10 feet above flood <br />stage having a discharge of 84,300 cubic feet per second. <br />Although the flood crest attenuated rapidly downstream from Fort <br />Morgan, the floodwater reached the Union Pacific Railroad grade <br />near Crook, Colorado. <br />Flood of 1938. Heavy rainfall during the period from 30 <br />August to 4 September over much of the upper South Platte River <br />basin caused flooding on many of the mountain streams tributary <br />to the South Platte as well as the South Platte itself. <br /> <br />4 <br />