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<br />OOlO~:3
<br />
<br />.
<br />
<br />e::cept on the abutments where it would narrow 'miformly to 20 feet
<br />at the ends. A gravel blo.nkot \'Iould be placed under the riprap,
<br />"nd a drain provided in tIle downstl'enI_~ toe. The Ie ft end of the de-m
<br />would ~ave a reverse curve in the alinement to ~coommodate a spill-
<br />\"Iay chute through the dam,
<br />
<br />Table 17.--Sw,unary of data - Design No. 2
<br />
<br />(Y.loo2-...Peak 23,OO..2....?fs, flood volume 6,000 acre-fee';; in 18 hou;:::..)
<br />
<br />.
<br />
<br />Total storage capacity at max. wos. el 4,16407
<br />StorQ6e nare wos~ el 4115905
<br />Active storage (irrigation) w. So el 4,143.5 to 4,159.5
<br />Storage at min. W9S~ e1 4,~4335
<br />Inac~ive storage w.so e114,120
<br />Outlet capacity W,s, e14,l23.5
<br />Spillway cc.paci ty w. So el 4, 164. 7
<br />Diversion capacity w.s, el 4,150
<br />Elev~tion top of drum
<br />Elevation ma~num water surface
<br />Elevntiarr normal water surface
<br />Elevation orest of spillway
<br />Approximate height of dam above streambed
<br />Approximate height of dam above bottom of cutoff
<br />Length of crest of dum
<br />Total volume in embanlanen-t
<br />Total estimc.ted cost (current prices)
<br />Cos't per acre-foot of total storage at nor. \"1, s.
<br />Preliminary Estimate No, 20-D_I088
<br />
<br />13, BOD
<br />8,650
<br />7,450
<br />1,200
<br />000
<br />100 c fs
<br />784 cfs
<br />300 cfs
<br />4,172
<br />4, 164. 7
<br />4,159.5
<br />4,159.5
<br />62 feet
<br />trench 89 feet
<br />1,365 15. feGt
<br />334,000 cu. yd.
<br />$906,4T!
<br />-iIT6:r. 78
<br />
<br />acro-feot
<br />acre-feet
<br />acre-feet
<br />acre-feet
<br />
<br />Dam _ The potenti!ll rolled-e!lrth dc.m \';ould rise c-fproximately
<br />62 feet above t:,e streambed ~nd 89 feet above the bottom of the cut-
<br />off trench, The length along the crest would be 1,365i feet, The top
<br />width would be 25 fee-t at e levc.tion 4, 172. The upstream slol'B would
<br />be 3 to I protected by 3 feet of riprap to elevation 4,142, the
<br />locntion of a 20_foot berm, then 4 to 1 to the g:"ound su,.face. Tho
<br />do\"mstream slope ,.,ould be 2 to 1 to elevation 4,132, 5 to I to elevn-
<br />tion 4,122, thence 4 to 1 to srou.'ld surfc,ceo The entire bnse of the
<br />dnm would be stripped and \"/Quld have' a cutoff trench to bedrock wi-th
<br />centerl.;_ne 15 feet upstream from tho o."is. The tronch would hnve "
<br />mo,ximu.'Il de?l;h of a.pproximr.tely 4'7 feot and" bottom width of 30 feot,
<br />exc8pt un the o.butments ..here it would narrow uniformly to 20 f88t nt
<br />the ends, A gravel blanket would be placed under tho riprc.? o.nd 0.
<br />dro.in providod in the dO\"ffistrec.m toe., The 18ft and of the d"m would
<br />hnve n reVerse curve in the nlinemen~ ~o ~ccommodute a spil:~QY chuto
<br />through the dam.
<br />
<br />.
<br />
<br />Distribution Works
<br />
<br />There >lould be no need for additional irrJ.,7,cc.ti'-,.n "-,,,1 d'_e';l'U",t."\Oll
<br />v~orks since ex5.s-t,..;..nG s+.rlH.:>{.;'U.(JB -..'l(J',ld 1\8 '-1fi.G~
<br />
<br />54
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