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<br />',,"-,-="~' ';::'""'?"~_~~~~~-r~C"'--"~:-'- <br /> <br />. . . <br /> <br />60. Cache 10. ?oudre Ri.ver. :.11 tho majer floeds ef record 0:1 the <br /> <br />Caoho 1a Poudro River have oocurl'ed in tho spring, Thoy Here causod by <br /> <br />vory intonso cloudbursts with small areal extent oocurring c.t the timos tho <br /> <br />strocm Wf..S ',ig;h from snoviIllelt. <br /> <br />61. The flood of I.:ny 20-21. 1904 is tho groatcst of wl-.i.ch dofir:itCJ <br /> <br />reoord is c.vailc.blc. It was cn.usc('. by r::p ic:i Snovilnolt in tLo mountains nnd. :JY <br /> <br />ho"',,y rains of oloudburst intensity ovvr the r.o"dwCltors of tho North Fork <br /> <br />and Boxoldor Creok. Tho poak di sch,"rf,c e l' tl:u North For,; d Livermoro, <br /> <br />Golor"clo vms ostim!l.ted to be 20.000 second-foot "Ed tho.t of the Cac:lO 10. <br /> <br />PoudrG Rivor near tho mouth of tho canyon te be 57,000 svoond-fect, The <br /> <br />discharge from the I30Acldcr Crook.. w~1ich 011.-C ers the; C::.:.ch.(; 10. Poudl"e Riv(;r <br /> <br />botwoon Fort Collins s.nd Grooley, Colorc.[lo, w';.s estimatod to ')0 7, 50() S0COlld- <br /> <br />feet. Because of the large amount of rod soil cc.rriod by this flood from <br /> <br />"Hook a~d Jvloore Glade" und Boxulc.:or Crook, it vms knovm c.s tho "red" flood. <br /> <br /> <br />62. Tho flood of June 21_26. 1917 was oausod by rains felling on a <br /> <br />hoo.vy snow covoring in the mountai ns and local rains in tho lower bo.sin. <br /> <br />This flood 'V"C.s hiShcst noar Greolo~{, Colorado. Tho mo.xh.1u.tn do.ilJ.''" discharge <br />d.1.-..1- (1 <br />W!l.s 5,800 seoond-feot on Juno 2.~ noar tho mouth of the oanyon, unti 4,24,0 <br /> <br />seoondoofGet on Juno 25 ~t the mouth of t!,o stream. "pC) pock disoho.I'ge at <br /> <br />Greeley wc.s 13,000 second_foot. <br /> <br />63. Floods also ocourrod in 1814, 1864. and 1876. Othor r"inor .::'loods <br /> <br />roported occurred in 1900. 1903; 1907. 1921, 1923, mld 1938. ~ flood in <br /> <br />1891 resulted i'rom a heavy rainstorm r,nd r"wid snm'l!lle1t en the hor.dl1ntors <br /> <br />Md vms augmented by the i'cci1ure of tho ChCJ1lbers Lake D~J"!l. Tho roportod <br /> <br />peak disehc.rgo of t;-,e 1891 flood nenr tho mouth of the canyon was 21,000 <br /> <br />sooond-feot, <br /> <br />6,1. Flui ns tributarieo. <br /> <br />Tho m"'jor portion of' tho plains rogion in <br /> <br />tho South P18.ti:;a Rivor ba.sin to tho oust ['.no. s:uth of the riycr bolow Denvor, <br /> <br />Coloro.do is drained by Box Zldor.. Kiowc., Bijou, and Beo.vor Creeks. ~"roquontly <br /> <br />oleudbursts occur ove!' this region o.nd CIl.USO floods on those strcc.ms. <br /> <br />II-30 <br />