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. 124 CONTRIBUTIONS TO HYDROLOGY OF UNITED STATES, 1923-1924. and their convergence caused a concentration of the clouds, which resulted in' a cloudburst. The area thus affected extended from the mouth of Buckhorn Creek to a point near Fletcher Hill, 5 miles above Mason'Ville; above that point little rain fell. The rain started about 5 p. m, June 15 and lasted for several hours. A rancher who lives a short distance above the mouth of Missouri Canyon reported that during the period of greatest intensity 2 % inches of water was caught , in 30 minutes in a tub in his yard. The -ground was well saturated from previous rains, being thus unable to absorb much of this rainfall. The following table shows the maximum discharge at the three points where it was measured: . . Maximum discharge at points in Buckhorn Creek basin, June 15~ 19~9. Marlmum dIs- charge (seeond- feet). Drainage area (square miles). Toto!. Par square , mDeof ar.. affected. Area Total. .. d:OU;g flood. Time of . flood crest s"..,.. Locality. Bttekborn Creek ".__ Half a Inile south of Mason- viDe. Redstone Creek. '.'h MasonviDe....._________nn._ Missouri Canyon.._ Nearmouth (sec.26, T.6N.R. 70W.), ,. 10,500 '.820 '."" "2 ... 1,820 134 .. 2.' 40- IOp.In. '21 'Do. . Z,,4 6.30 p. m. . Two cross sections, measured'Mol feet apart, and slOpe between found to be 0.0085; some brush and d!bris. otberwfs6smooth; "n"-O.045. - '. .. Two cross sections measured 392 feet apart, and slope between found to be 0.0148; some brush but (airly smoothseetioD;..n.....O.03tl. ' -' . . . Three cross sections measured in distance of 2SO feet, and slope of entire d1stance found to be 0.027; fairly smooth iUCtlpt in places where it is rocky; "n"..0.036. - - The flood in Missouri Canyon occmed several hours before that in Buckhorn Creek and probably did not ,contribute greatly to the latter flood. As the point at which the Buckhorn flood was estiniated is below the mouth of Redstone Creek, the measured flow in the Buckhorn includes the flow of the Redstone, 'which leaves about 3,700 second-feet to be contributed by the Buckhorn itself during the crest flow. lIDNOB. FLOODS, Data on three minor floods in small areas are presented in the following table: -MtWimum discharge of minor floOds in the Rocky Mountain region, JOSS. Mamnnm diseharge (second-feet). D,_ S"..,.. . Date. ar.. Par aqoara , Total. ...... (Diiles). mila, - _. . , luly 26,1923 01,000 1,270 L6 M~ Gulch 1* mllea above Golden. Colo......~._.___ SkyrOcket Creek at Ouray, Colo___.~n.._.._..__._______ 1D1y 20;1023 ~OOO 0,000 L. South Sand Draw in sec. 3, T. 3 N., R. 3 W. Wind River Aug. 21,1923' 2,"" meridian, Wyo__._____...~...;.__'...________._:._....'._. ..-......-- .---.._-.. . From two cross seet10ns -194 feet apart; slope fonn.d to be 0.000; "n"-O.04O.