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. Julv26.1950 According to the Pueblo Stftr Journal on July 26, 1950: "...St. Chades, Hue.fano River, and countless other streams draining from the Beulah-Rye erea were flooding their banks today though wete. had started to recede... High weters resulted principally from heavy reins along the upper resches of the St. Cherlee, the Huerfeno, and the Arkansas in western Pueblo County... In the Burnt Mill district, a light showsr Wes re_ ported with no hail, but one resident described the St. Charles as high as it has Bile. been since the 1921 flood. She said the weter Was flooding OVer banks onto the prairie in spite of ex_ ceptionally deep Channel..." . MlIvlB.195S The Pueblo Ster Journal of Mey 18, 1955, stated, "Rainfall of three to four inches in the Rye-Beuleh district~ sent the St. Charles River to flood stage Wednesday. Tha St. Charles races, bankfull, just below Righ~ay sa, eight miles east of Pueblo. A mile below this point, ths St. Charles empties in- to the Arkensas River." - . " rUTUR[fLOOOS This section of the report discvsses the Standard Proj- ect flood and the Intermediate Regional flood on the St. Charles River in the vicinity of Pueblo, and some of the hazerds of great floods. The Standard Project flood represents the reasonable up- per limits of expected flooding. floods of Intermediate Regional flood size may be e~pected to occur more often, but they will not be as SeVere as the infrequent Stendard Project flood. Large floods h~ve occurred in the past on the Arkansas River and its tributaries in the general geographical and phyeiog. r<!lphiClllregionofPueblo. Heevyetorms.simi1ertothoseceusing past floods, undoubtedly will recur in the Arkansas Rivar <!lnd St. Charles River watersheds to cause future floods of similar or greater size at Pueblo. In any determinetion of future floods which may occur on a given stream, it 1s desirable to consider all storms and floods that have occurred in the region on watersheds with similar topography, watershed cover, and physical character_ istics. Detarmination of Intermediate Reaionel flood The Intermediate Regional Flood is defined as having en average frequency of occurrence of Once in 100 years, although it may ~cur in any year end possibly evOn in successive years. This flood is calculated from statistical an<!llyses of streamflow records available for tho watershed under study and analyses of rainfall and runoff characteristics of other streams in the goneral region of the watershed. The Intermediate Rsgionai flood represents a major flood, although it ie less severe th<!ln the Stendard Project flood. The Intermediate Regional flood on the St. Charles River study reach was determined from statistical studies of re- 'linnel ann"al p~ak flows. Abc, the variable r"infall end runoff "