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<br />SOME FLOODS IN THE BOCKY MOUNTAIN REGION. 109
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<br />Rainfall in Big Horn drainf!-08 basin, Wyo'J July 14-ft6, 1923, in inches.
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<br />Station. 1< " 16 17 18 ,. 20 21 22 23 .. 2' 2. Total.
<br />PaviDiou_______________. ----- ----- u__. ---- ----- .---- .---- 0.40 -Ti: [1(1 1.20 -i-32- 0.70 '-30
<br />Diversion dam__________ Tr, 0.19 Tr, ---. u___ Tr, crot- -'-Or .38 ,03 3.06
<br />Lander ...n____h_______ 0.16 ,22 ___OM ---.- o.S6 .10 ,21 --:05- .36 1.98
<br />Middle Fork____________ ,4' ,22 11.03 __OM ----- ---.- ---.- __n_ ,3. ,3. ... ,65 '-42
<br />Rivertan..._____________ ,40 .58 ,fYl ,02 1.90 .12 ,02 '-11
<br />~i:ioiiS:::::::::::: .54 ,38 -1:20- .25 ,30 1.47
<br /> -:Sr ,17 '1.22 .40 2,,"
<br />Worland ~__U___U__h_ .02 ,94 ,16 1,",
<br />Hyattville______________ -:i5- -if;: 1,50 -ift:- 1.50
<br />Basin___________________ -'-Or -'-30. --:~r --.-liS- ,17
<br />~t:::::::::::::::::: -:ir -T-;: -ft: -.-ir -:i5- -.12 1_22
<br /> Tr, .12 ,10 ,33 1.02
<br />Shoshone dam ______u__ n___ __on ----- ----- __h. ----- .---- _nn ,30 .10 ._n__ .60 .10 1.10
<br />Deaver a _________.._____ _n._ .---- ----- ..... _.-.- -.-.- ----- ,31 _11 -.-.- __._n ,04 Tr, .47
<br />Lovell________._._______ Tr, -'i'i: .Ti: .__u __n_ ----- ----- -:if -:07- -T-i: -Tr:- .fYl -Tr:- ,OS
<br />Powell.n_~_~__________. ----~ __n_ __h~ .--.- ----- ,.. .4.
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<br />.. .. Regular Weather Bureau station; precipitation for M-honr period ending at midnight.
<br />& Precipitation .mea&Ured In morning for 24-hour period ending at that time.
<br />NOTE.-Ex.ceP.t as otherwise Indicated.. observations-are generallY made late In the alternoon. neBI' 5t!n-
<br />set, and precipitation recorded is tor 24-nour period ending at that time. . ','
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<br />One ac~unt of the storm on the Big Horn was given by U. S. G.
<br />Early, agent of the Chicago, Burlington & Quincy Railroad at Bonne-
<br />ville, who stated that a severe electric storm began about 10,30 p, m,
<br />July 23, and heavy rain fell until 3,30 a. ill, July 24, The total
<br />amount of rainfall during this period was estimated at several inches,
<br />although no measurement was made. A storm appeared to come
<br />. from the southwest and met one from the northeast about 20 miles
<br />east of Bonneville (about the center of the Badwater drainage basin).
<br />H. D. Comstock, of the Bureau of Reclamation, project manager
<br />at Riverton, made the following statement regarding the storm near
<br />Riverton: -
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<br />Heavy, scattered showers fell on the evening of July 21 but did little damage.
<br />Very heavy rain fen between 4 and 7 p, m. July 22, One cloudburst extended
<br />some 15 or 20 miles east of H UdsOD, which is 17 miles southwest of Riverton. I
<br />reached Hudson near the end of the storm and estimated-that at least 1.5 inches
<br />fell there in 1}2 hours. To the east the rain was probably heavier. Simult8.ne~
<br />ously there was a. heavy storm beginning near Lander and extending northwest
<br />along the foot of the mount~. The heavy general rain began at Riv~on about
<br />lOp. m, July 23 and lll8ted until 3 a, m.July 24, Riverton seems to be near the
<br />south boundary of the storm area, which extended at least 50 miles east' and over
<br />50 miles northwest and north to'.. point beyond the Owl' Creek Mountains.
<br />About 5 p. m. July 24 a very severe cloudburst occurred over an area 10 miles
<br />in diameter;eentering over sec. 23, T. 3 N., R.. 2 W., 'during which 2.20 inches
<br />of rain fell in less than an hour. Heavy ~ occurred at various points every
<br />afternoon and evening until July 27. ~e area. just west of Pavillion received its
<br />most intense"rainfall on the evening of-July 25. ' .
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<br />Stream-flow records at regular gaging stations, estimated maxir!tum
<br />run-off of small tributaries in the drainage basin (p, 111), and state-
<br />ments of residents show, in connection with the rainfall records, that
<br />there were three distinct areas in which the rainfall was high. The
<br />main area, the rain in which was the chief cause of the flood, cent~.red
<br />445960-25-8
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