FLOOD08394 - Laserfiche WebLink

Home Browse Search

. and August 23. The mean annual maximum and minimum temperatures at Pueblo are 68.0 and 37.3 degrees Fahrenheit, respectively. . 10. WIND. Wind data within the aubbasin are available for Pueblo WeatlU!:r Bureau Airport and Colorado Springs Weather Bureau Airport. Both stations have the highest mean hourly speed in April. Pueblo Weather Bureau Airport has the lowest in October and COlorado Springs Weather Bureau Airport has the lowest in Auguat. The mountains and valleys locally affect the true circulation pattern. The fastest mile recorded at Pueblo Weather Bureau Airport was 80 miles per hour. This was from the west and occurred in January 1950. Fastest mile dsta are not available for Colorado Springs. . . 11. EVAPORATION. Evaporation records for the subbasin are rather sparse. There are only three stations with records and they are not complete for the year. Average total class "A" land pan evaporation at John Martin Dam is 60.94 inches for the period May through November. For the same period, the average total class "A" land pan evaporation at Pueblo City Reservoir is 57.24 inches. With a pan coefficient of 70 percent, the result- ing lake evaporation for the period May through November at John Martin Dam would be 42.66 inches. That at Pueblo City Reservoir would be 40.07 inches. . 12. RUNOFF RECORDS. There are five existing stream-gaging stations on the Arkansas River between Pueblo and John Martin Dams and 25 existing stations on tributaries that enter the river in that reach. Table 1 lists period of record, average annual discharge, and peak flow data for 17 pertinent stations. Locations of these stations are shown on Plate 2. . . 13. FLOODS OF RECORD. Historical records include refer- ences to many floods in the Arkansas River valley above John Martin Reservoir. The earliest known flood in the area occurred in lB26, long before permanent settlement in the valley. An employee of the Hudson Bay Company, who spent s considerable amount of time in the vicinity of the site of old Fort Lyon, reported that in 1826 a flood covered the bottomlsnd nesr the present town of Las Animas to a depth of about 15 feet. The next year of notable flood was 1844. The occurrence of this flood is known largely through reporta of early travelers and trappers. Snowmelt was reported as the probable cause of the 1844 flood. Other historical floods are discussed in the following paragraphs. 14. FLOOD OF 1859. A wagon train in the late 1850's probably 1859. reported a flood near the present location of Lamar. The river spread to a width of 2 or 3 miles. The wagon . . It 4 .