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<br />
<br />PHYSIOGRAPHY
<br />
<br />The ~lissollrl RJ\,t'1 drams a lotal lIf ;looUl S~q.J50
<br />square Imles HI the United Slales and Canada Whde the
<br />~lissouri RIver lhdf docs not .:fUSS the InterOdtlonal
<br />Boundary. lhere arc abl)Ul 9.7 J 5 ~uJre miles in (anad;J.
<br />drJined by lIS tfibul;H1cs. Wllhin the United Slat.;-), lhe
<br />\lissouri River BaslIl ":~'l1lpri~<.'s one-si'l.th of lhe contigu-
<br />ous area ll! the \alioll. II l11c1uJes all of \ebrask.J.: must
<br />of Montana. I'\onh Dakota. S\IUlh Dakuta. ;lod Wyommg.
<br />ahnUl one.halt uf K:lnS,;ls amI \lJssllun. ahoul ollc.fuunh
<br />of Colorado and Iowa: and J ~mal1 parI of \llllll<.'sola.
<br />In this Appendix. the \li%ouri R.J\'er Basin il1dudc~
<br />all of Ihl:' \lissouli Riwr drainage tnlhe llnlled Stat.:s,
<br />That pull ion of Ihe basin lying in Canada. the Gre;!!
<br />Divide Basin in Wyoming la hydrulogi,'ally dmed baSin
<br />on fhL' d1\idL' betweL'll the ,\lissouri Ri~'er BJSIn Jnd
<br />Ih.. Colorado Riv('r BJsll1l, and sevt'Tal smallel nun-
<br />contribullng aft'aS Jlong lhe OJSIll', OOUlldafY well' (',-
<br />eluded. Wilh Ih(' ex..:lusl'lI1 lIf lhese Jlea~, Ihe haSIIl
<br />Conl311lS ahnul 51.l,~q5 square mile, (lr nearly 3~4 mil-
<br />lion acres of bnd and walelllable ] 1
<br />
<br />Boundaries
<br />
<br />The baSin is an elungaled area Iyin!! dlJ!!onal1y lrom
<br />lhe northern Rl),'ky \lountains 10 lhe O/Jrk Plateaus and
<br />includes all or parts uf ] 0 sCltes. Its weSTern boundary
<br />coincides wilh lhe COnIinenlJ1 DIvide from norrhern
<br />\fontJnJ 10 lhe headwaters of lhe South Plalte River
<br />wesl 01 Colorado Springs, Colorado. From lhis areJ lhe
<br />southern boundJry of thl' bdsin eXlends east KlOSS the
<br />Great P1ams of Clllorado and KallSas and lhrough lhe
<br />northern portIOn llf the Olarks in \lissouri, [0 a juncllon
<br />With the \hssouri River on lhe \hsShSlppl Rl\'er l1ooJ.
<br />plains. This pOTIlOIl of lhe basin boundary follows a
<br />series ot ralher wdl d':-lined divides between lhe dramage
<br />of the Arkansas Ri\'er on the S,mlh and Ihe Soulh P1aue,
<br />Smok} Ihlt. and Kamas fivers to Ihe nOl1h.
<br />The norlhern boundary of Ihe basin ex lends from
<br />Ihe CQlltinental DIvide in Gla":ler \alional PaiL north.
<br />easlerl~ 10 and th('l\ce easterly 01 Crosby, \ollh Dakola
<br />The boundary Ihen ':onlinut'_~ in a southeaslerly dlrecllun
<br />
<br />CHAPTER 1
<br />
<br />BASIN DESCRIPTION
<br />
<br />Table 1 - DRAINAGE AREA, MISSOURI RIVER
<br />BASIN, UNITED ST ATES AND CANADA
<br />
<br /> Square ThouS.iilnd
<br /> UK,lIion ~lih:$ Ann
<br />\1L',ouri Rl'-er DrainJj!e Area,Canada
<br />10 \lls'J"irri J{IH'r neal 51. lOUI~,
<br />Indudln!!~on-{'ontlibutln!l '\rl'a'. 529.350 33/j,1!l~
<br />DJa1nal!c _"rea In Canada 9,115 6,nS
<br />[)ralnagc Area in the l'nile,l SI~I<".
<br />lndudin~ ~<ln.('onmbullng Area, 519,6JS J.\2,SM
<br />~on-{-(lnlflbulln!l ArcasAlon~ Ih,'
<br />lIasinRuundH} ifllhel'flill'd
<br />Stalc,~ot lndudedln lhe
<br />S1Ud~ ,
<br />Grcat D'Yldc lIa<;iflJndConl~unu,
<br />Arca,on 5\\Ccl\\aICt J{l"cr
<br />Drainaj!e and in ~orth !'lane
<br />R"l'r DrJlnJi:'"In \'innily uf
<br />Rawlins. Wy<)rnin~. 4,160 1.663
<br />Smoky Hill RIYCI DIJlrlaj!c,
<br />Cl'loradoand Kansas IRO 115
<br />Inbutal'C\~oltll of GaULo;(ln
<br />Re'Cl"\mr.~orth Dakota 300 191
<br />Tnbulali<.',of Jam,., and ~1j:
<br />51Ou, R..cr" ~otth and
<br />South Dakota 1.700 I,Ok8
<br />Tot;1I Non..{'ontri!>ut,n/!
<br /> -\10:-'" 6,3~O ~.OS!l
<br /> -
<br />B.a"n Land andWalcr .-\rea 513,195 3211508
<br />
<br />I_\.c..' ,,,1111" ~"-c,, "alc"hc.h Ihal ,j""ol,-"nlrohulrd"cCll)
<br />t" .."f",~ rUJlofl -\,~" fi~urn ..r.. ,'rrr""nl..I~,
<br />
<br />10 the jun":lioll of th... \lis'iouri and Ihe \Iississippi rivers_
<br />Along this ldtlel pllrlwn the basin boundary, th... dram-
<br />agl' dinde follows [he cresl (11' il number of landf\)rm~
<br />betwe...n lribulari...s olth... \!t:i-\lluri Rlv...r on the weST
<br />and the S,'lIf1S, Red. and \llssissippI ri\'elS to Ihe north
<br />and east.
<br />
<br />General Description
<br />
<br />Ele\'atiuns 1111he basin vary fwm high mountain peaks
<br />of 14,000 feel above mean sea 1",\'e1 and high mountain
<br />p:J.sses of ]] ,000 feel in the Rocky \lountains through
<br />foolhi1l~, plams, and river boll om lands to aboul 450 feel
<br />mean sea le\'el at the moulh of Ihe ,\hssouri RIver near
<br />51. Loul> (figure ':1,
<br />The mountamous areas 01 lhe basin are generally com.
<br />posed Qf hard ..:ryslallrne and sedlmenlary rQ(ks .....ith
<br />
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