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<br />'. <br /> <br />. <br /> <br />. <br /> <br />,...... .., <br />G,)"--~ <br /> <br />49 <br /> <br />this is diffi~~lt to predi~t on ~c~ount of t~e -~Fr3cJd~nted <br /> <br />chd.I'act81' of t:lJ ojlJrati~ns. <br /> <br />A structur..; n~c;Js:3ary to .;olviJ thJ -problam of '~hc <br /> <br />Colorado Hi ""r by a dam in Boulc.'3r Canyon is so high and so <br /> <br />fw- b.Jyond tha pr ~C.Jd,.LTt,s tlut it S..}Llf.u.3 advisab18 ':Ii th duo <br /> <br />care for 3nginJ~r~ng sa!~~ty ~1d 3conornlf. to avoid going <br /> <br />ou.tside of such pr~c~}de~ts so l'<;1T ~s pos;;:ibL~. For this raaacn <br /> <br />it saJms to b3 dZ..Ji~J.bl'3 to b"J.ild t:1.3 .3tructilra of cOi1cr~to in <br /> <br />acccrda.nce \"Ii ti ;811 est_,-:~liir.1,Jd theory cO~lfii"':-Jed. b~.. n"JJTl82"OUS <br /> <br />ctnd v8.riaci. pr3C8::10.3:"1t.;. A roc~~-fill st:r.t.~ct1.<r.:.: mir;ht b3 c:wapor <br /> <br />b-o..t o-,;r axpJriJ:1c:J i.3 so lL;J ted tndt ~.re C.:1:-.1. not be s~"e that <br /> <br />this \v111 bJ th~ casJ, and if SO~~ Ul1for3s3~n di!iicultiJs, <br /> <br />S'.1ch a.s blo\'I-outs under t;.:3 roc~: fill. 3houl1 b.) anGount~r.3d, <br /> <br />ita a}..11~l;,se mi~2.t ,JV.311 JJ :;r~....tJ~~ t3;m that of a co'!:.crate <br /> <br />struCt-.:r'3. and ~w.~ ca."'l :1.Ot o':'J S"Dxe th'J.t it ':lOuld. ")3 '::~ltirely <br /> <br />safa.. <br />