|
<br />, .
<br />
<br />In all of these stuuics adequate releases \;e~e r.nintainc<l for dmmstl:::.~':;~ "at."."
<br />supply and ,,'atcr quality control. As dcplcti'OllS inm.1sC;-avci";;,, pool leveL
<br />c!ecit5:fsc'iliids<ir.ie(lctrllc"ntal eff"cts on recreation all ,I fish and I>ildlife cell),;
<br />be expectccl, but canllot be qU~lltified. Since Ooou control ~lQ'''':,' ~p" C:l~,;!';:.'
<br />.al>tl- operational proceuures Here -he+d the saI:le ill all stl!llics, rer:arulc5s of
<br />depl <.:tio!1s, serl'ic(: to flood contTol lwul<.l be u.naffected. Siloi l;.rly, irTig,1tio/1
<br />servj.ce [yo::"! the main ste~n reservoirs 'vas fully pl'ovitlcJ for und.er all c.ondi tiO:1S
<br />of Hater use for coal. The t\'iO functions \,:h iclt \'lOuld be most :Jffected ar(:
<br />hydropo;'ler gencration and navir.ation.
<br />
<br />The cxpccte:u ~':...L~_0 to p~l\':0r under all condi.tions of upstrci1i!j \-::ltC:l~ U~0 ell:1
<br />c2~iJ.)' he (p:<lntifi'~~~ fro:n tj~l) rosel'voir refulation studies, a$ sh()\';n (i!1
<br />ExhiLi~ S. '1'his O;\ilibit shm.:s the peaking c~p3.Lility awl tile :n.cra~:c a:!I;u~d
<br />energy ~c~lcration for c.::.ch of the three co:11 dcvclopl1;cnt assu~.~ltil')ns, ~lS
<br />corr:p;~rcd to results frou tho Framc\~'or.k study. Ai thou~il the avcrt1gc C!i'~:;~~~Y
<br />gcnc;:atioi1 c..!'JCl"e2.SC:s 5 i gnificantl Y \;lith j ncrc;1scd dcp.lc tions, t.hi 5 dC(:.....:..:;i~C:
<br />is l~ss fOl' cach of the three coal uevelopn,nt projec:icns thml cnvisj,C:l~u ill
<br />the rl'~;:;c~.;oI'k s tt~d)'" The :~lltc of dccrea~:c in C]}(:..CJ~Y ge;~cl~a.tion for '(;i'.': J!l~);,:":
<br />likely dei' leU on cOi"tJition (Curve I: on Exilibi t 3) is less tk:a );,,:; bee" use": .in
<br />most prc.....-.ic>u:;; plt:imliJig sl.udics.
<br />
<br />The expected ~_cr\'iC:_~:...-!?__~1~\:jJ~~!!9!1 under Vt~2'iou$ pr.oj cctions of Fj>stri;:1::i r:;:-~"l:t:;j'
<br />use can aJs0 be r;lli-l.]!"..i.fi{'u to f,r.:~,le deGree. 11d.5 ::.5 (~[;li:OJl~;tl'ilt0,J on l-,;.:ilih::'-i:. (,
<br />\'1jlidl prC'sc;nts the lcnf~th of the r.::.\'ignticn sn~~SOIl ,',:hic!i. can t:: (;XPl~CL(:!.! fG~~ C~i.c.h
<br />of th(~ th:.~r:~~ C03.1 ti.~:vcJo~}::.8ilt projection:. ~lld for the. Fratle~';or): 5tl.ltly. t.s .Ul.
<br />the cJ.sc; or ro:':er, t!~0 c[[ccts of t!.~pJ.CtiO:15 P:~t~(:r each of the tllrc:c (>)~~J.
<br />G.cvcloJ)j.~:;d: FJ..1j~':; OJ', r~~~l\1:.:c-d na\'i.~atinll SC~1.S0Jl:':; a:'C not ~s ;;ic'tL;r,:[;Ilt;11
<br />as cnvi5jc:i~;d i.n the l:l"~r.;c"\-,'o1"k pl~c;l and V.)'C CG~;lp:ll'ublc to l.'!1r'.l has b'~-C:ii cxpC'r.:~...:c.:.
<br />as It ~';;:s~lt of previolls ~tuJi(;s. Another factor 1,lhich is TltO)'C: d.i.:fficl.ilt 1.0
<br />qllar~ti{:t) b;l~ \-;hich is .if~:jOrt~~nt to navlg':l.tion is the qu:!....ltity (If fJe-:: ii~ th~
<br />river JU1'.il~Z the nL:vlg~tjo~1 sc::.son. Di..:"(~ct COi:l}1:tl"is!:nls or. thi~~ qa'.!.J1.t:~l:Y 11:1':'.:: 11:-';:'
<br />been J.l?c;c, ~)u: iil ~ci1cJ:;],l the highet' dp.pJ.ction projectioI1s ,'.'ill )"e~lllt in
<br />inc::rca5c~d P.t~::lcers of J~anths ',dth flOl-.'s at minil::.l.!.'1 satisfactory lcVr~l~: ~~'~d t:~(;
<br />praL~ble need [(,1' "ddi tionaJ. dre<.l~inr..
<br />
<br />An a5sl1r~d sU!lply' ()f \-.'atcr for coal development in the qU~H1titics indic<.:tcd {'.,Ju,d
<br />. r('ql,irc rCf,ul.:ltiolJ hy rescl''.!:Jirs. This is dcr:.lons tr?tod hy Exhi ilj t 7 l'.hi"r:h ~.;hv'.'s I
<br />the lD51 flo~.j at ~::Lr: Go.rrison dn:n site a~ rCEulate:d by the main s tCIiI ::l~~cl key I
<br />upstl"caj;l tTiuut0.ry rC"sc:t~voixs and the flol-l as it h'ould hn-"c becn \.:."itho,rt ::'(\\~\i.l~~t.i(JIl.
<br />The unregulated flm,s !:ould h;,\'c been very 101-1 in Alir.ust nnG Septc~'ber lU\tt I
<br />insuffi<:.icnt to l-r:eet the expected \.:<1t~r rC(luircll!cnts. Similar situati(Hl~
<br />prevail in other years, 'as sho\;1l by Exhibits S through 13. Exhibit B I
<br />presents monthly flo\;s at Fort Pcck Dnm for the period 1893-1972 for "ater use
<br />conditions as they existed in 1949. Exhibit 9 presents the same information I
<br />except that the data arc arranged in rank order (by months) instead of '
<br />chronologically. T\;o lines have been added to Exhibit 9 to indicate those i
<br />months "hen flo\<s at Fort Peck \<ould not have been suffiicicnt ,;i thout I
<br />stora~e regulation to meet water deman<.ls. The solid line incloses those j
<br />months ( 4 in July, 12 in August and 1 in September) "hen flO\<s '<ould have I
<br />been insufficient under 1970 \<ater resource development conditions. The dashed I
<br />
<br />
<br />i
<br />5 I
<br />
<br />I
<br />I
<br />I
<br />I
<br />I
<br />.
<br />I
<br />I
<br />I
<br />I
<br />I
<br />I
<br />
|