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<br />,'; '~;ecejent rains began on May 22, 1965, with as much as 2.68 in of rain reported for a single <br />::2\' Ju~e Land 5 were days of moderate rainfall, and light rain fell on the June 15, On June: 6, <br />n.,avy rains in basins to the north set off record floods in the Platte River tributaries, Northeast <br />c/ Colorado Springs, rainfall amounts that exceeded all previous records were recorded, Fourteen <br />Inches of rain were reported in the Palmer Ridge area, just north of the headwaters of Jimmy <br />Camp Creek, This tremendous amount of rain fell in approximately 4 h [20J. <br /> <br />The storm cells that developed on the afternoon of June 17, caused heavy rains in the headwaters <br />0; some streams for a second consecutive day. The rain gauge near Fountain recorded over 5 in <br />of rain in 2 h, ending about 1 :00 p,m, No gauges existed in the Jimmy Camp Creek Basin, but <br />the peak flow at the measurement point was believed to have occurred about 1 :30 p.m. <br /> <br />The peak measurement was made by the USGS, using slope-area measurement techniques, at a <br />site approximately 4.5 mi upstream from the confluence of Jimmy Camp Creek with Fountain <br />Creek. The drainage basin has an area of 54.3 mi2'and extends to elevations above 6800 h, The <br />stream slope averages 73 h/min. ' h ",' <br /> <br />Lag times were computed based on theoretical equations because no information was available <br />on the actual time distribution of the rainfall that occurred in the basin, Using a C value of 1,2, <br /> <br /> 180 <br /> 160 <br /> "0 <br /> " <br /> ~ <br /> u <br /> IS) 120 <br /> IS) <br /> IS) <br /> W 100 <br /> 15 <br /> '" <br /> a: <br /> I <br /> u 80 <br /> U1 <br /> H <br /> t:1 <br /> "- 6" <br /> 0 <br /> W <br /> f- <br /> a: <br /> '" 40 <br /> 20 <br />r e <br />I <br />I <br />, <br />I <br />! <br />I <br />! <br />I <br />L- <br /> <br />2213 I <br />I <br /> <br />PHF PEAK ~ 191000 Cr~ <br /> <br />~ 1 <br />l I \ <br />~ ! \ <br />f I \ <br />i j \ <br /> <br />r / \ <br />! J \, <br />LC..<__L ~-- ~._. <br /> <br />36 HOUR PHF VOLuMe ~ ?5~ee-AC-FT <br /> <br />BUREAU OF RECLAMRTION <br /> <br />PHF COMPARISON STUDY <br />PMP GENERAL STORM BASED ON HMR 55 <br />JIMMY CAMP CREEK NEAR FOUNTAIN COLORADO <br />LAG = 3.2 HR BUCKHORN DUH <br /> <br />HISTORIC FLOOD OCCURED JUNE 17 1965 <br />KLB 12,29/83 <br /> <br />., <br /> <br />" <br /> <br />5 <br /> <br />13 15 20 25 30 <br />TIME FROM BEGINNING OF RRINFRLL (h,.) <br /> <br />35 <br /> <br />40 <br /> <br />45 <br /> <br />Plate 4. - Computed PMF hydrograph and historic flood peak for Jimmy Camp Creek near Fountain, CO <br /> <br />15 <br /> <br />