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<br />Thea rage run-off of the Colorado for the years of l'Scordar_ctlJotil
<br />sU1Phur,.,1 year.s,' 523.0,'00 acre, ", fee,tJ...G,.,.l.enw,ood. ,SPrt,.,..,ng..s.' tnclu."d,tXl€l,<:jl.,.",~,..,d,.~.'.i,.,FOl','"i!t."
<br />3,413,000 re..1'eet, Frldta, 6,,00.000 aore-feet. Theile amounts are ilxoll#ii~,
<br />of' supply' ns_d in present ti'r~aUon otpolorado River Basin,l~ll. ,.,';; '.', '
<br />- '. - -.
<br />j , --~
<br />low1ngis the estimatede.mounto,~ wlI-'ter aw.ilable . for .,d~'!le,'.',' rSl.,
<br />u.ge8lrea above the Colorado..BigThompson colleotion s~tem"
<br />levation. . ,', . ' "
<br />
<br />
<br />The f'
<br />'f'rOlll the d
<br />8,260 teet '
<br />
<br />YI:ELD OF GRANBY RE.$SRVOIR
<br />
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<br />Stre'
<br />site for t
<br />1935 and II
<br />1'eoo1'dsOl1
<br />'cover the
<br />
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<br />f'lowreClo.-ds available on the CQloradoRiver near theG$nby tt1.l\ r
<br />years 190a..ll and 19~5"36,and on WillC!W Creek f'or the.~~'~~f':'
<br />6, were supplemented by estinlateli based on ava.ilablestree.m..tli)w ,
<br />he. Colorado R:I:-ver at Hot SulPhUl',QPrings'ai1d Glenwo04 SJlrtngs~4
<br />-year, period, 1900, to 1936. inclusi ve. ~
<br />-~
<br />
<br />
<br />A cap
<br />!Granby Relle
<br />were set as
<br />,Shadow Mo'
<br />,.tioable all
<br />'leaves an'
<br />
<br />ityof 482,ooOacr,e-feetwa.s seleotlld!l-s the best ClIl.paoi'i;Yf:Qii1the.
<br />oir., considering' cost and use. "Of'thisos.pacity, 20.00pac~teeir
<br />de 1'01' dead storage toredllce PUlllPirlg 11f'tsforwa.ters,d~l1ve+,d to
<br />in Reservoir. A f'urth$r objective is to keep to the 1~$1:; 1#'ac+
<br />the e:xp OS ure of' 'res,erVoir~bed~hen storage isexhaust.cn Thi!p .'
<br />the capacity of' 462.000 acre-fellt. ' '
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<br />i1' operating studies are baslld on thll following conditiorth ,'<1("
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<br />
<br />corded (orestirnated) pe.stflowsot Colorado River !l.t~~d~,L'
<br />GranbyDe.ms reduced by2? perollnt prior to 1906, and 13peroE/Pt'
<br />of the flC!W of the North Fork at , GrlUld Lake to allow for incr~si~
<br />y the Grand River di toh. ' ',' '
<br />
<br />(a)
<br />Mounta1na
<br />thereai'bel' ,
<br />4iversions
<br />
<br />(b) ;.
<br />;the flow' 0
<br />'trOlll May t
<br />
<br />l10w Creek diverted to reservoirtot~e extent of 90 peroent q~
<br />,:illOj'( Creek and otherstree.ms, int'erceptE1d by the diversion ol'(tlal
<br />October, inclUl!lve, of eaoh year. . ..
<br />~;
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<br />(0) rawberry. Meadow, and",alden Hollow~Cr!leks also diverted whell~l'~
<br />practioabl The flow of these strE1a1ns,togetherwith some additio~l wa.~rs
<br />capturable 1'0lIl Willow Creek at t 1m.es, are :expected to offset evapol$tipn"nd
<br />'seepe.gelo es in exoess of present losses from the Granby and Shadow Moui\tIl.U~
<br />Rllservoii' 's tes. ~~'f,
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<br />'unt 11 Uaril
<br />~dlt1ons- :so
<br />'15 to Sllpt
<br />:and to m,il\
<br />;ClOlllputat1c>
<br />
<br />1'elE1ases rran'Granby Darn for any reason.
<br />
<br />. . .
<br />an$mounte.1n tunnel to be operated 11.'1; full capacity frO!JlOctobtti:
<br />:31 f'ollowi,!gi with operati()Us 1;hereai'ber gaged tof'it ~~~ott~oh~'
<br />s toavoiq. spills and yetooIJ)e~trf1,te flows in the pel'i~Of ~ly;
<br />bel' 15,fol" thE1 pUrpOSE1S of'best4illtribution in PO'WEll'p1'04~fl'1fJion'
<br />he reregulating storage rE1quirements on the eastern slope. 'the"
<br />assumed infalliblE1 forE1casts of run-off. .~'
<br />4
<br />
<br />W
<br />,each year :
<br />
<br />minimum storagll hold-over of lOOiooO aO,1"ll"feet on September :30: 01',:,
<br />assure dE1pendable power prodMt:\.oi1in Winter. .~:
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