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<br />H20
<br />
<br />FLOODS OF 1 9 65 1X TEE r:....-ITED STATt:S
<br />
<br />SOUTH PLATTE RIVER BASIN) COLORADO: JUNE 1965
<br />
<br />B')l
<br />-"
<br />
<br />10Ki p\(.(>('.Jp(l tho..:e of Ifl,-l7 D!l T()]] r;;tll' Crl'ek and Sand Crepk near
<br />.\1Irora by .~~-I- and itl P(>l'('Pllt. rl'~l\C('liu'],L but the dischar~c of Sand
<br />Creek at Denn'I' in 19G;j was only 7,l Iwn.'pllt of thar in 19:>7. This
<br />anomaly i..;; dllP to difl'erC'!lr(>s ill till' di4rihlltion and timing of the
<br />r;\illfall ill 1~j,-,7 ('()lllpari.'d \\,ith !f!fi,-"
<br />The illf!I)t\' from ~:llld and C']p:u. ('1'('01....: "\'1l1 t]H' f!n~~' np tn ~H;,800
<br />cfs at FOr! Lupton, :2s Illiles dO\\'l!-:trl';\lll frol1l 1)('1\\"('1". Thi~ dis-
<br />I..'hal'g-(' \\'a...: IllHI.h lllc)!'t' th:lll th,' 1l1:li!\ "]):1111\('] ('(\'1I1d ":lJ'r,\' :It rhi...; 10-
<br />C<liiOll, and it \\':L"; .Ll lllllP;O: tilt' ]li'(.'.iOll....: lll:IXilllUllI ill ;j>, H'nl'~ of
<br />l'(>('(lnl.
<br />Peak art<>nll:Hioll {I'll1\) ('hallll\'J qfll':\gP \'-a~ gn'ater than till' illf!o\\.
<br />from St. Vmin Creek and the Bj~ Th{)llJp~()1l and Cache la Po \let l'l'
<br />Ri"ers; therefore the peak disehal'W' on tllC' Somh Platte Hin_~r llear
<br />Kpl'sey was down to :?:)!;)OO ef:;. 'I'll(' ("l"(,;o:t 1\':\('he<1 ""('Idona 70 lwurs
<br />after it pas..'e<l Littleton, awl the discharge '''as only 18,800 cfs. Chan-
<br />nel .storage was Iiot ;(", signiflcant in the +:2-miie Ke1's('.y-\\-eldona reach
<br />because lllo3t of the flow l'PIll:lilH'd within the main ('hannel, and only
<br />'-:OI11i' bottom lands "'ere inuJl(latp(l. Tilt' ('olltl'ihlltion of Kiowa Creek
<br />
<br />Subwatershed J~33 has.\Il area of 1.12 square IuiIes, and the previ-
<br />ous nl.lximum ;'-llJinute inflow since 1956 was only 93 cfs. The uuxi-
<br />mum outflow ill 1D6;, was 2,600 cfs; therefore the maximurn
<br />oJ-minute inflow probaoly exceeded ~,.)OO cfs per square ulill:'.
<br />Kiowa. Creek at E1Lel't, 0.;) mile npstr('am from 'Vest I\:iowa Creek
<br />11 ad a peak discl1argl' lIf 11..-,00 cfs ;ll U}30 hours June: 17, an hOur be-
<br />fore ',""cst Kiowa C;'('ck ('n'~tcd at :?OJJOO cfs (1ig, 7). The flood rca<:hed
<br />BeIllll'lt. about -10 lllile.": down :i[ream from Elbcrt, at (ll:~O 110Hl'S .Jnne
<br />IS, and the peak discl1,\l'ge was 24,DOO cfs. Between Bennett and the
<br />" " ...~. ," r-t --. .~ _1 ~ -~ "','\ ,..;l.~ 1'1.., iJ~,,{l .-1;.::-
<br />'''('''''' ')1 1\.'('\\'.' \. ,...,,,. '{ lll" ;,lHee Ul ;l1)U{t... u~, .1u.C::-C, ~.lC HUU" , .~
<br />~il:~:;~':l 'to su:.ll ;::ll~~~~:~t 'th:tt~th(> flo\\: ill'ar the mouth was nol enough
<br />
<br />1DO.OOO .-
<br />
<br /> r
<br /> 10.000.--
<br /> ,
<br /> ,
<br />c r
<br />z r
<br />0
<br />Ol I
<br />~
<br />;:; IOOO~-
<br />~ E
<br />to c
<br />::' ,
<br />u
<br />"
<br />0
<br />u
<br />'" 100:,
<br />..;
<br />0
<br />~
<br />~ ,
<br />" ,.
<br />u !-
<br />~
<br />0 "-
<br /> , "-
<br /> "- I
<br /> "-
<br /> "- I
<br /> I
<br /> 10.
<br /> r
<br /> 1200 1.00
<br /> JUNE
<br />
<br />UJ the Sonth PLltt(. Hin'l" \\",t~ \'Pi'Y :::m:dlllotYi-irh:::tanc1ing the IKcUl'-
<br />rence of major floocls ill the head\Y:Jtpl':" of Kio\\';"\. Creek.
<br />
<br />KIOWA CREEK AX]) llUOU CHEEK BASIXS
<br />
<br />The floods on upper Kio.....a. and BijOii C:n~f'ks o'''CEITt?d i)!l trtU!~
<br />
<br />.~
<br />"
<br />-. ,
<br />
<br />24-30 hours after the floods 011 Phllll aile! Cherry Creeks. Fpstream
<br />from Elhert 011 Kiowa Creek and its tributaries, the crests occurred
<br />between lU(I] alld 20;)0 hours .June 17. East and IYest Bijon Cn'"ks
<br />peaked at 2400 hOllrs,June 17 near Deer Trail alld Byers.
<br />SufficiC'llt l'(>('ol'ds were obtained at three of fire Soil Conserratioll
<br />Sen.ice flood-retention reSCITOil's near Elbert to allow computation
<br />of the maximum tl-lHillute inflow. Snbwatershed H-:1 has a drainage
<br />area of 2.S~ square lIliJ('~, and tilt' lIJ:lXilllllm ti.nli1ltlte inflow was (i,HSO
<br />efs, or :?,440 cfs })\'1' ::;({llal'C mile. This iuflow rate waS reduced to a peak
<br />outflow of 2.010 cfs. Tile maximum i>-minute iJlflo\y frOlu snbwatersllc<l
<br />Q-51 was 1.:350 cfs, or :!,2!)O ('f:-: pel' sqnare mile, from 0.50 square mile.
<br />This inflow rate was l'('dw'(-'d only (i P(-'l"('(-'Ilt to a peak olltflO\\" of 1,270
<br />efs. The dr.linag-c arl'a () f .sllh\\'att'I':-,lwd B-D is O.li4 square mile, and
<br />the maximum 5-minnt(' inflow was Ml7 cfs, or H:Ji1 ('fs pel' sqnare mile.
<br />The outflow reached a 111:txiHllllll of a:3 cis.
<br />At K-7V ReselToil', the peak outflow in 19()5 was 2,:)70 efs, GO per-
<br />cent more than the pre,.ious maximum outflow, Presumabl.r~ the maxi-
<br />mum ;j-millute illfio\Y ill IHn.j also exeeedcd the ."),:250 cfs inflow of 1HZ)7
<br />01' was at least 1,700 cfs per square mile from ;).20 square miles.
<br />
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<br />
<br />EXPLANATION
<br />
<br />
<br />Kiowa Creek at K-79 Reservoir
<br />Drainage area (sq miJ 3.20
<br />
<br />--=
<br />
<br />Kiowa Creek at Elbert
<br />Droinage area (sq mil 28.6
<br />
<br />=
<br />
<br />"
<br />
<br />West Kiowa Creek at Elbert
<br />Droinage orea (sq mi} 35,9
<br />
<br />.ioOO
<br />
<br />2<00
<br />
<br />0400
<br />
<br />0800
<br />
<br />1200
<br />JUNE 18. 1965
<br />
<br />1600
<br />
<br />2:100
<br />
<br />17. 1965
<br />
<br />Jo'Wl'llt: 7.-Discharge hyurographs nt ~eh.('tl'<1 gaging stations in Kiowa Cn't"k
<br />ba<i;..,
<br />
<br />333-527 0-69~4
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