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<br />
<br />38 S ..t MISi>OURI Rn'ER BASl~
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<br />15
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<br />of tll(' ~Iissollri Hin'r, The ).(ar('h t100dg r('!lult from meltinA' snow
<br />in tht: pluins UN'ft alH)\"(! :-'ioux City Dnd the bn'lik.up of rinr ice.
<br />TIH'SC lIoUtls are usually fl.ccornpnnit'd IJ)' only il. slllull amount of
<br />pil"t'ipilJl.tion, ,rune> floods result froru snow Ilmw" ill tlit' Iieauwatf'r
<br />mountains tlccompanif't! hy hf'll,'it'r ruillfu]!. In llthlitiou flush floods
<br />of Ion" oril{ill t'll.u~ )1I'11\'." dlllllng"" !H.url." t"'f'r)' yellr, Se"ere floods
<br />betw'~t'n ~iiHlX City fllld the 100llth o(,l~urrl.d in 18H, 1881, 1903,
<br />1908, 1909, 1915, i9:?7, 1935, 1942, Dnd 1943, Floorl Hows from the
<br />"lissouri Hin~r contribute >>ubstnlllially to Hood stngi'S nIld dH.lll11.gi'S
<br />sloH!? the :\Iissis...ippi Hiw.t, Belwt'eti Sioux City lllld Ihe mout]l of
<br />the :\lis:iOuri nhout J .800,000 tlcn's of IlInd, Inrgely cultinltA'd Iind
<br />highly prodUdi\'(', 8N' sulljed to illl111dation at exlrt'me rin'r states.
<br />Irnpottunt llrt'Ui'I in Sioux City, Ornlillll, Council Blufh, Ilnd the KUllsus
<br />Citys, and pllrls or nJl of over 50 slIlllller municiplllitil's, ute included
<br />iu the flood plain. In ~Ill.t{'h, ~lar, llnd ,Juue of 1943 \'ory sen're
<br />floods ot:curret! which o\'t'rtopp('J or causNI fllilllre of lJenrly 1\11 the
<br />levees on tlli' ~lissouri Hivt'r hdow Sioux Cit\.. The di\'ision engineer
<br />estimll.t~ the dumllg"t"S of illeSt' thre!' 1I0ods 1I10ng the mllin stem bt,low
<br />Sioux Cit~. at S:J;j.OOO,OOO. ruder ~t'lll'rlll pttn'ision8 of th~ Flood
<br />Control ~\ct of 1941 and the net for emcrg'l'Il(,~' 1I00d ('outrol work
<br />apprond .July I:!, 19-13, tlHl Dl'pllttnwnt spent $800,000 for n>scuo
<br />lIud enwtgt'lll'Y work llud is now 111<sisting locnl intt'tt'sts in it-storing-
<br />tlwir h'vel's to afford the original t1('gi(~e of protection which is ('5ti.
<br />nUlh'.1 to l"Ost 81,800,000.
<br />5. ImprovCIIH'flts eOllslrul'ted bv local intt'rf'sts 10 g('eure r1,li('f from
<br />floods nlong tht, .:\fi",sl)lJn Hi\'l'r f,e{wt'('1l Sioux Cil\' Rntl the mouth
<br />consist of level'S and tlrninl'lg(' works nt Inlllly'lot:lllitit's. Tllt'sc im.
<br />pron'lIlt'lIts, which are t't'portro 10 haw' cost $20,000,000, gt'llerally
<br />afrOi'll only minor protf'ctioll to Ihe at~ll..s indlltlt'(1. By till' Flood
<br />.Cl)ntrol Act nppro\.('t1 .fullt' 22. 1\1313, Cong-n'ss authoriz('d the COil.
<br />etrul'tioll I)f 1f"\'t't,S lint! Willi;; II) IIfrorll prolt'ctiou from tlnotls at the
<br />KUll~l\S Citj'6 in uC'A'ordl\lwl' "ith plalls appro\'l't1 hy the CIJief of
<br />Engilll't.rs 011 t('COmml'lulatioll of the nonnl of Engill{,l.rg for Rivt'iS
<br />and lIurbot'!'l ami us fllllt'IHI"d 1,\' furlht'r 8.ll('\'('\,S 81U1 studit'!;. Tlli'!
<br />work IIllS "('{:'II PIlt'til!.lly eomplt'i('d. I II II surve)' rl'Jlurt of ,Julle 27,
<br />1942, iOullllliUed t~) the Chid of En~ill('l'n:. tIlt' division cngin(,t'r
<br />N'Commf'ntls modificlltion of the plan to iudude tl. cul-otT lll'l\r Ihe
<br />KnlllOus Citys nud YRriOUS changes in t.he prot<>etiHJ work!', lIe I'!'ti-
<br />malt'S the hllal cost of tbe works until'r his Illod.itit'd pI1i1l at
<br />$15,200,000. T1w Flood Contl'(ll Act of Au!:ust IS, 1941, authotiZt'd
<br />hank t'rosiOIl}lrl'\'t'lllion.....ork8 in1be vicinity of Sioux Cit\, nutlleyees
<br />for protN'lion ud.....p('n Sioux City nwl Knnsful Cit,y Il.I1J nuthorizNI
<br />gl,OOO,OOO for initiation of construction. Tllesc It'ye~ would a/Tord
<br />prott'f'lion from II Hood l'imilllr to that of 1938. 1'\0 conslruction hil8
<br />~'I't "(-'('ll lUult'rtaken. By thl' Flood Cont:rol Act of ,JUllt' 28, 1938,
<br />Congrf'&; llppro\'1:,d n gelll'rnl compt't'hensi\'(~ plan for flooJ conlrol
<br />and othl'r \llIrpo..es in the ~fis,~ollri Hiv('r Basin ano, for its initiulion
<br />IIlld pl!..rliH aceompli!."hl1wnt, lIutlwrizell $9,OtlO,000 fot rest'r\'oirs 10
<br />[)(' St'lt>('letl and npproYt'd b,' Ille Chief of EllgillN'fl'.. The Floull
<br />COlllml "\ct of AU~llst IS, '1941, authonzpd tll(' approprintion of
<br />~'j ,000,000 tu.lditiorHl.l for prosecution of the plan, includmg tbe Harllln
<br />COllnl~' lh'''''ryoir 011 Ht'puhliclIn HiYl'r Rud stich otIwr SUppll'IlWlltal
<br />flood control W(lrks on the Ih'publiclln Hiwr n:< thp &'(.tetsry of Wat
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