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<br />. <br /> <br />rl " /.... ... <br />~JJ..; <br /> <br />I <br /> <br />[ <br />I: <br /> <br />II <br />[ <br />II <br /> <br />. <br /> <br />! <br />I <br />I <br /> <br />I <br /> <br />j <br /> <br />! <br /> <br />'. <br /> <br />5'0 <br /> <br />Comparison of Bo'ulde>r Conyon Resorvoir <br />'Nith other posGi-ole sites. <br /> <br />The dommd fo!" " l?..rgc regul..ting r'JS~l",')ir ,)n the <br /> <br />Lower Colorclo is urgent 3Jld iI!lpcrati ve, fi rst, for l"eguli\- <br /> <br />ting floods, second, for prOViding stor~e water for irriga- <br /> <br />tion, ~d thircl, for power. Without tho power, the roscrvoir <br /> <br />is not feasible ~t a:l, as the expense would be too gr~at to <br /> <br />be borne by tho othGr interests alono. <br /> <br />The rascrvoi~ 8i te provided. bJ" :l. clam in Boulder CMyon, <br /> <br />or its eontinu~tion, Bl~ck C~lyon, is tho lowest ~oi~t on <br /> <br />the Colorado Riv8r whor8 a site of sufficient cap~city can <br /> <br />be found. Above this si te the Gr.md C,myon occurs, and no <br /> <br />resdrvoi~ of c~p~Jity s'ufficiont to central the entire flow <br /> <br />of the ri,,,r occurs until we roach a point above the Grand <br /> <br />C"-nyon N,tioneJ. P',l'k. A site has been proposed above the <br /> <br />mouth of the Pari,,- Riv~r in Glen Ce_"1.yo'l, md it hP.s been <br /> <br />urged th~t a rcs~r\.oir formed hero would, for ~ given height <br /> <br />of dPm provide gre?t<::l" stor"'!1e e..pC\city, 'll1d would so r'og'Jl..te <br /> <br />the flcois :'.s tc f~cili t-?t8 the cor:.stl....J.ction of other d?IGS <br /> <br />fa.rthc:c dovm. Those .:~rc valid 3.rgum'Jnts, so far ~s. they go, <br /> <br />but such ? rJs::>rvoir \/:.uld not answer prcsl3nt purposes for <br /> <br />Se"ilcr,w, l'llaaor.9. Bctwl~3n the Glon C3nJ"o:c, ,,",d Boulder C?.nyon <br /> <br />.itcs about 50,000 s~~~rG miles of drain~go flows into tha <br /> <br />Colorado, including t;", Little Color3do, t~e Virgin, tile Pax1a, <br /> <br />th.J K..1.ll~b, "-nd mmy sl!l2.l1Jr tribUl;:'.ri'Js. 'This region j'.lZ'niS;DS <br /> <br />2.b01.lt 10 par cent o~ t1le W?t"Jr s'U;pply p?..ss1:ag Boulder C3.IlYon. <br /> <br />~nd most of it is subjoct to torr~nti31 summer rainS, ~d to <br />