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<br />0011.70
<br />
<br />with about ~r,..toO acre" und"'T irrigllliun in 19-H.
<br />Tl:',lching II peak of about 96,000 acre... hy 1964. then
<br />decreasing 10 abfllll ,'..S.:300 aeft';; in 197s, Total head
<br />I)f livestock han. \-arifc-d from \ ear to \f'lIT hut in j;!:t'n-
<br />(-fa] han- steadil.... df'creibE-d a -10181 or" about 1 million
<br />hpad ()\(>r thf' 19H 10 197.>\ period.
<br />
<br />Streamflow al'l"rdilln,. dut' In f"fl:'st mana!':f'ment
<br />practic{'s in thE' subbasin were estimalt'd at 19....(10
<br />acn..ff:'t'l in 19H inc-reo,.ing 10 H.6r)l1 acrf.--f",et an-
<br />nually In 1971"..
<br />
<br />During the 19..t-i to 1918 perilld. thl' plJpulatLOn
<br />..hifted from a primarily rural population of alltlUl
<br />1~1).401l. or 6:2(', nf tht' 11l1al populotion. to a primanlv
<br />urhan population with 1:10.7/10 rural and Ifll,.Jo:,! ur.
<br />ban. ThiS change in population fel1t>('l,.; the growth due
<br />to f'IlN10" dl'\'f:'lnpnlt'1l1 in the >;llhha~in.
<br />
<br />Figure 27
<br />Yellowstone Subbasin
<br />1978 level Depleted Streamflow
<br />Yellowstone River near Sidney, Montana
<br />1944. 1960 and 1978
<br />
<br />.
<br />;:
<br />~
<br />o
<br />,
<br />9
<br />E
<br />.
<br />.
<br />
<br />SubbaSIn HISlorlC DeplelK)/1
<br />-Hi5tonc Streamflow
<br />SubbasIn 1978 level
<br />DepleliOfl
<br />-1978 level
<br />0. S
<br />
<br />.
<br />>
<br />.
<br />u
<br /><
<br />8
<br />~
<br />
<br />10.000
<br />
<br /> Vi "","" l,eamllOw _
<br /> ;:
<br /> z
<br /> I-
<br /> ~
<br /> ~
<br /> Average HistOriC Stream'lo.. 1944"{97
<br /> 9360,000 A.F
<br /> Average 1978 lever Depleted Stream/lOw 1944-
<br /> _ 9.270,000 A F
<br />-
<br /> ~
<br />
<br />15.000
<br />
<br />14,000
<br />
<br />"000
<br />
<br />12000
<br />
<br />11,000
<br />
<br />9.000
<br />
<br />1978
<br />
<br />6.000
<br />
<br />7.000
<br />
<br />6000
<br />
<br />5.000
<br />
<br />, 000
<br />
<br />19~.l
<br />
<br />19130
<br />Yea'
<br />
<br />1918
<br />
<br />FrlJm HlH to W:.'i. total d{'pletion>; jncrl'a~t.d only
<br />by ahout 2.'iO,1I1I0 anl'.feec howl'wr, during I9HO. total
<br />dt'p]t'tion~ wert' llhout ...flll,non (1nl'.ff't"t aho\'l' the 197~
<br />]E-HI. The dt'ITell.;(> in total annual de-pletion~ Iwtwf't'n
<br />19fi1l and 197..., i~ attrihule-d to a change in irrigation
<br />praClH'e and a df'crt'ilse- in ITrigatt'-d acrb throughout
<br />the perino 01 timt'.
<br />
<br />:\ graph 01 .;e]h.!t.d .\'ear.; oltht. 19:;0;, lewl dl'p]He-d
<br />"trt'aml1ow i,.. shown on Fi"'lJrt' 27 On thl' a\'erage,
<br />haH.d on (tw Hl,1--I to 197," adju"'led ~lreaml1ow and
<br />~uhjecl tn ,,\:Ite- waler right~, inter,..ul1f' compact" and
<br />in~trl'amf1m\ n'4uirement~. ~1.:!70,(HIIl <tert'-ft'e-t an.
<br />nllall~ an' availahle- for all non-consumpll\'l' and ne'"
<br />l'on,..umpti\(' u,..f'~ aho\'l' Ihis ~trt'llm gilg:e.
<br />
<br />Wl'slern Dakotas Subbasin
<br />
<br />The \restern Uakota~ Stlhba~in co\'t'rs 77,119
<br />squart' miles in lht' north central part of the :\lissouri
<br />Rin'r ha"in, FiJ:Urt' :!A (page 3:ll.
<br />
<br />l'rinnpal trihut:-trit',.. tll tht' \!l..;,..(Juri Hin-r Includf'
<br />the Little \tl~sotlri, Knife, Ht'llrt, Cannunhall. (;rand.
<br />\loreau, Che-.\'t'nnt'. Had and \\'hite Hi\e-rs_ TIlt" to-
<br />pography i,; rolling with e-It'\'ations i1vera~ing :!,OOO
<br />("'l'!. Tht' Hlad; Hill.. Ill' :-;otlth Daknt1i and thl' Had.
<br />Janns 01 :\orth Dakola art' two uniqllt' topogmphi{'
<br />are-as in lilt' sllhhasin. TIll! majilfit\. 01 tht' suhha"in is
<br />of a prairie grassland t'co~...,..lf"m. Exlt'nsj"e rlryli1nd
<br />farming of t he crop fall"w typt' ha\'t> dt>\'t']opt'ri in west.
<br />t'rn :'\orth ()Hkotll.
<br />
<br />The majllrit.... 01 lht' ~\Jbhasin art'a is located in
<br />;-";"rth and Soulh Ilakptil. Smilll parIs r\ft' a!sl1ll1{'Rted
<br />in \fontana, \ryoming and :\'t'hrnska, H<tl1ching and
<br />larming arf' !hf' prf'dominatf' t'conomic ~t'{.tors. Tour.
<br />I,..m I,.. al~" an impllrtanl ,..{-'{'tor of tht, t'conom..... The
<br />pronu{'\wn of enert.:.- hw]" from l'tlfll and lignite de-.
<br />pl''''lt~, a,.. we-II a,.. the prl'duetioll of crudtO' oil and nat.
<br />ura] ga... prp\'idt' signifil'llnl t'{'onomir <lI'ti\'ity. Gold
<br />mint.d in Tilt' Hhwk Hill~ ;l{'('IIUllt,.. for <l high percent
<br />01 \hl' naliollil] productioll. (;round water resource'"
<br />aTe IUnlted I1nd gPIWTil]h- <Ir(, ,)f poor qualit.....
<br />
<br />~urlan. waler ~uppli(-.; in t1H' tributary Slr('am~ lirt'
<br />tht, ft'~ult of "'prmg ....now melt and ~t1mlller thunder.
<br />"howt'f.;. :h a n'~lllt, ....treaml1ow;; In the trihutary
<br />..trt'<lm~ ate ('xtremt,l.... variable from ....l'ar to ....ear. Th('
<br />~urfilt'e ",ater nlltl1tlw pomt -..e]e{'ted for Ihi."'- subba"in
<br />I." Ihi' l--,,(~~ g-<lj!t' numher O(H~l;\n110 I..cated 011 the
<br />\11~~ollri Hi\'('r .'II Furt Randall Dam, :'nuth Dakota.
<br />Tht, drainagt' area ;ih/l\(' thaI pllin! i~ apptoximatt.l....
<br />~1;~,i)n(J square milt''''-. For the 19-H to 197", period of
<br />record. Ihe .'I\eragt' recorded ~tre<lmnnw at that point
<br />was about :!."dil-l c.L~.. or \'';.6 milliun acre. feet an.
<br />nualh.
<br />
<br />At thi,.. timp Ihert' are- no impllrls l.lr {'Xports of water
<br />to or from this sllhha",-in.
<br />
<br />Four major fl,,..t't\Hir,.. ha\e he-t'n cnnt-truct('d 1l11h('
<br />.;uhhasll1, all on tht, \Ii.'>souri main ..tern. In tt>rm" of
<br />normal capanty tht, Oaht> re..er\'oir at 19.3 million
<br />ill're.je-('t I~ the Iflrgbt. Cllrn"nn Dam and jt~ l.ake
<br />
<br />:H
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