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<br />E56 <br /> <br />FLOODS OF lil65 IN THE UNITED STATES <br /> <br />SUMrndARY OF FLOODS <br /> <br />E57 <br /> <br />TABLE 21.-Flood stage!! and discharges, June-August,-in Utah-Continued <br /> <br />Period Year <br /> <br />J=.. <br />August <br />1965 <br /> <br />Ooge <br />height <br />(feet) <br /> <br />Discharge <br /> <br />The U.S. Forest Service reported that there was.above-average snow- <br />fall in the mountains for the water year. The area that mainly con- <br />tributed to the flooding was above the 9,200-foot altit.ude, which was <br />the approximate snowline before the flood, After the flood, the snowline <br />had moved up to 9,900 feet. Therefore, the snow on about .14 square <br />miles of the. Sheep Creek drainage basin had completely melted during <br />the period of flooding. <br />Precipitation at Half Moon Park in the Sheep Creek basin was <br />about 3 inches during the period June 9-10. Other rainfall amounts, <br />in inches, were: <br /> <br />No. <br /> <br />Stream and place of <br />determination <br /> <br />Drainage-. Known befol'e <br />area June 1965 <br />(sqmi) <br /> <br />Maximum floods <br /> <br />Reenr- <br />Ols renoo <br />in",",'" <br />("",,) <br /> <br />Sevier Lake bpaln <br /> <br />28 Sixmile Creek near Sterl~__ <br />29 Twist Canyon n~ <br />.Annabella. <br /> <br />29 ~959-6S t9S9 u__....__ 12.48 <br />2.57 ::::::::::::::::::: t~: 1~ h_.~.26 <br /> <br />820,__________ <br />1,050 21.6 <br />34,930 .(1) <br /> <br />Cedar City Valley ---. <br /> <br />Allen's Ranch <br />Manila (east of Spirit Roosevelt Vernal <br />Lake) <br /> <br />30 Fiddlers Canyon near <br />Cedar City. <br />31 Dry Canyon near Cedar <br />City. <br />32 Salt Creek near Cedar City__ <br />33 Coal Creek tributary at east <br />side of Red Hill near <br />Cedar City. <br /> <br />7.S hh...u__..n____ Aug. 17 ,...~~...n. <br />.9 nh__h........__. Aug. 17 _d..U... <br />~i's ::::::::::::::::::: t:::: i~ :::::~::::. . <br /> <br />34,730 <br />33,.670 <br />1,120 <br />'300 <br /> <br />(') <br />.(4) <br />(') <br />(') <br /> <br />June 8~_____u______u_________._~_____:_______ <br />9__~__u_~__n'________ ___:._u________.n <br />10____________u_________++_._oo_______~___ <br />11___..________..._____00_.....__________+_ <br />12________...__n____~__...____u______.... <br /> <br />0,02 <br />.~1 , <br />.30 <br />,45 <br />,10 <br /> <br />o <br />,17 <br />."40 <br />,75 <br />.03 <br /> <br />-----i:i7n-..muo:w-~. <br /> <br />Type of aamage <br />Roads and bridges________..:.________ <br />Crops _____________~______________ <br />~l diversion_~-------~--~--~--- <br />Canal h~dings---~-----~________~- <br />(lanaIs ________________.__________ <br />])~ ---~------------------------ <br />Damage to f.ences and iand_________ <br /> <br />L088e8 <br />$4.700 <br />4,970 <br />6,500 <br />10, 000 <br />25,050 <br />2,500 <br />560 <br /> <br />The highest rates of runoJf froni fhis storm were measured at Ashley <br />Creek above Red Pine Creek n~r Vernal (ste. 12) and at South Fork <br />Sheep Creek near Manila (sta. 5) where the peak discharges were <br />respectively 8.8 and 7,4 times thatoI a 50'yearflood, ' <br />On July 18, thunderstorms i-aged across northern Utah' causing <br />flooding in some areas. In Ameri= Fork Canyon seven mud slides <br />caused floodwater to overtop the road and wash it out, and many <br />campers were marooned between the.'mud slides for several hours. <br />Floodwater swept through bu:ildingsat theTimpanogas'Cave National <br />Monument causing considerable damage. The U.S. National Park <br />Service reported 2.18 inches of rain at Timpanogas Cave National <br />Monument between 1800 hours and 2200 hours on July 18: <br />A sootion of Utah Highway 68 about 3 miles north of Elberta was <br />washed out. Extensive daniage was done to crops and young fruit trees <br />at a land development project north of Elberta. <br />Peak flows in American Fork Canyon (sta. 24-26) and in Utah Lake <br />tributary near Elberta (sta. 27) exceeded those of 50-year floods by <br />ratios of from 1.3 to 9.7; <br />Flash floods OCCUlTed on small streams (sta, 1:>-15) in the Uinta basin <br />on July 22. Only 0:30 inch of rain was rocorded at Vernal Airport, <br />and lesser amounts were recorded at other sites in the area. Because the <br />storms were over small areas.and were of high intensity, the reported <br />rainfall figures show no relation to the intensity of the stornis. <br /> <br />I From u.s. Forest Service. <br />2 Ratio of peak discharge to W-yea.r Rood. <br />. 3 Estimate based OD field llUl'Vey.. <br />4 Probably exceed$ iSO-year :flOOd. <br />ar:d~r:Jel~feAh:n~a:- d~~ sq mi: the reservoir has Dot b~n n.sed. ~inC9 1958 becau.$e of :educed storage <br />! Several times the 5O-year flood. . <br />1 Includes that part of BuUberry Creek above flood dike. <br />S Site and datum tben in use. <br /> <br />~irch Creek road-was estimated at $8;000, $'7,000, and $50,OOOrespec- <br />tlvely. Damage to rQads and bridges in the Wasatch.Nation.aLForest <br />was estimated. at $35,000. Damage to cultivated land was Considerable, <br />and seven. campers at Palisades campground on Sheep Creek were <br />drowned when they were swept away by the floodwaters during the <br />night. ' . <br />The Soil Conservation Service reported flood damage in the Uinta <br />basin as follows: . . <br /> <br />Total_______________________ 54,280 <br />