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<br />-. <br /> <br />1438 <br /> <br />(Ini t10.1..D.e.YQ.IQl'lID r!t ) <br /> <br />Tho potolltio.l Twin I..c.k0 s Do.m, a s modified by tho Chief Enginoer <br />and shown or.. exhibit 12, pcq;e oI,!J, would be of Garth and rock fill, and <br />would be 10M.tod in tho co.nyon fermud by I..c.ko 'Creok. A blc.n!:ot \'Ii. th <br />o.n c.vcrc,~;o thiclmoss bf 10 fOvt would 0nond 500 feot upstrvo.rl frcnn tho <br />top of tho ()",bc~knont, beth in the ri vor bottorl and on tlle o.butmonts~ <br />Tho blo.nlcot c.nd abutments ,",auld noed protoction with ripr:J.p. Materials <br />D,re a.w,ilc.blo within tho vicinity of the damsite. Gro.nito cliffs a.bout <br />6 milos from tho dmsite c.fford a. SOUI'ce for ri:ora.p. <br /> <br />Twin lakos ~ featuros <br /> <br />Typo. . .... .. ....... .oarth and rock fill <br />Elcv., top. ... ...... .9,270 ft. <br />M.:lx. heiGht 0. bovo found at ion. .100) ft. <br />____._ _ _ _Longth of__crost_.__._...__.__. .'0' .4,:~CLft.._ <br />=---=--.-. -~~ -- -:-- _-....:.Cr_owrc.:wrdtli-=.=-;.....:...=-.-=--.--=-_.......:.~ i__.. _;.3_5--=f1;i~ - - --=---- u__ <br />::.~ -~ -=- =:'- -.-'---Mc.x.=thiclm0:ss"a.t;:brrse..=.=..,. .=;',5,80=,f't~-- c-~.:.., =-..;~. _ - <br />__ -=-_ -~_ -...::--.:-~Cut:o_ff~~:ti:o.ncli~~-~~~.~~-~.~.~~-=-;~.-nonf.)~.---: - _ =_ _.~ _- -:-=.. <br />__. ___. _ ~ _~_=_=o~~~~Cun,".-~~~~--".:--c -.':"-:-~'il'g-Oi~OSi"'cui-".ld~~ <br />------ ------- --- -.------ <br /> <br />c <br /> <br />------- <br />--~-- <br /> <br />-- <br /> <br />. <br /> <br />Tho spillway. which would be looa.ted on tho rir;ht awtment. weuld <br />consist of 0. co!:croto-lilood opon chc.nnel with E>. stilling pool. Ne woir <br />would bo providod o.t tho uPfCr end o.s tllO concrete lining of tho cho.lonol <br />floor would bo constructud to the spillwa.y crest clov:o,tion. A ch'mnel . <br />would be excavc"t0d to connect tho spillwa.y outlet tu the river. <br /> <br />Resorvuir outlet would be m,,-do by nectns of 0. conduit through tho <br />dam. Tl'll eutlot works wculd censist of 0. trc.shrc.ck, c. l4-foot, 6-inch <br />dim.lOtGr horsoshce conduit, a.n a-foot, 6-inch dic.motor rinr;-fellol"lOr <br />gctto in 0. b~to cho.nb0r noocr the a.xis, c. shaft to tho surfaco with 0. <br />hoist house o.t tho cre st, 0. 102-i"ch db.r.lutcr penstocl, in tho dovrnstreon <br />conduit, c.nd a 78-inch hollow jet vo.l vo in the povmrheuse. <br /> <br />Spillvr-y ~~d outlJt yorks feo.tures <br /> <br />---.-- ----- <br /> <br />Typo of spillwo.y. . . <br />Elov., top of cre at , <br />Length of crest .. .. <br />Milx. spillwa.y discho.rge . . <br />Outlut i.i1t~l,:o . . . .. . <br />E:c.ore;or.cy eut lot gc,to <br />Disch::-.rgo VC'.lvo. .... <br />U\jtlc t cenduit. , . <br />vutlct [:onstocl: . " ~ . <br />Outlot dischc-rge. <br /> <br />. open chctnr..ol <br />. . .9,256 ft. <br />. .40 ft. <br />. .2,64(.)":: sec. -ft. <br />, .tro.s~"'ck <br />.102 in, ring-follaver <br />.78 in. holl~l jot <br />. . .14-ftl) 6-in. diu, cOD.crote <br />. .102-i~. dia. <br />.800 soc.-i~. ct TI. S. <br />- ----- '--elov,-9,l-7-7-ft.--- ---- ----- ---- <br /> <br />. . . , <br /> <br />23 <br />