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Tributaries. Jimmy Camp Creek is typically sandy. Hat. and wide. Above its confluence with FOuntain Creek, just south of the city of F'ountain, the drainage area is approximately 66 square miles. The Security Creek, Widefield Creek, and Windmill Gulch drainage basins are adjacent to each other and drain the areas north and east of the Security-Widefield conwunity. Windmill Gulch drains into Security Creek, which in turn drains into Widefield Creek. Above its confluence with Fountain Creek, the drainage area for Widefield Creek is approximately 15 square miles. Within the region. precipitation varies considerably because of elevations, major wind currents, and local geographical features. Winter storms. typically from the northwest. tend to lose their moisture on the western side of the Rocky Mountains. The major precipitation comes through late spring snows, influenced by south- easterly winds, and from SUmmer thunderstorms. Annual precipitation varies from 8 inches to a high of 20 inches in the mountainous areas. 2.3 Principal Flood Problems Most of the flood-producing storms in the study area occur during the May-through-August period, The most severe storms occur in the transitional periods of late spring or early fall, when polar air intrusions are more intense. Isolated summer thunderstorms are frequently severe, but limited in areal extent, Available records do not indicate that snowmelt has contributed significantly to flood occurrences in the study area, Floods are characterized by high peak flows, moderate volumes. and short durations. The May 1935 flood is the largest recorded flood (55,000 cubic feet per second (cfs)) on Fountain Creek above its confluence with Jimmy Camp Creek (Reference 2), This storm, which was concentrated chiefly over the Kettle Creek basin, also caused the largest known flood on Monument Creek: 50,000 cfs (Reference 3), In Colorado Springs, Monument Cree~, attained its peak flow within 2-1/2 hours and was back within the banks 3 hours later. The flow rate of this flood exceeded th., estimated 500-year peak flcw rate for the area. Below the conflnence of Fountain and Jimmy Camp Creeks, the June 1965 flood probably exceeded all known floods in El Paso County. This flood was primarily from Jimmy Camp Creek, At a point 4.5 miles above its confluence with Fountain Creek, the estimated peak discharge was 124,000 cfs (Reference 2), which is estimated to have a recurrence interval exceeding 500 years, . 2,4 Flood Protection Measures The National Dceanic and Atmospheric Administration, in cooperation with communities within El Paso County, has established a Flash 4