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<br />PnOJI:CT WORKS
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<br />Two designs have been prepared and are included in this report.
<br />However, final selection Vlould probably be an intermediate size,
<br />basad on final determinc,tion of the spillV1a;.' design flood. At normal
<br />water surface, 4,159,5 feet, for the two designs discussed below, the
<br />reservoir would be about 2,5 miles long and would have a maximum
<br />width of approximately 1 mile. The water surface area, at this
<br />elevation, would cover 860 acres, and the agGregate oapacity would be
<br />8,650 acre-feet.
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<br />Table 160--Surrmary of data - Design No. I
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<br />(Flood peak 25,000 cfs, flood volume 17,800 acre-feet in 24 h2urs.)
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<br />Total storage capacity nk~Xa w.s. el 4,171.1
<br />Storage capacity nor. wos. el 4,159,5
<br />Active "torage (irrigation) w.s, 4,143.5 to 4,159.5
<br />storage at min. w.s. el 4~143?5
<br />I;lactive storage at Vi.S, el 4,120
<br />Outlet car>aci,\;y at w.s. el. 4,123.5
<br />Spillway caFacity at w.s. el 4,17101
<br />Divcrsion caracity at w.s. el 4,150
<br />Elevaticn top of dam
<br />Elev:ition F.la.ximum wuter surface
<br />Elevntion normal wa. tar surface
<br />Elevation crest of spillway
<br />Arrroximate height of dam above
<br />Appreximnte height of deem above
<br />Length of crest of dam
<br />Total volun:e in embankment
<br />Toto.l esti.mnted cost (current prices)
<br />Cost per acre-foot of total storage at nor, 1'1, s.
<br />p,.elin:ino.ry Estimate Drawing No, 20_D_I090
<br />Preliminary Eetimate No. 20-D-l089
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<br />streambed
<br />bottom of outoff trenoh
<br />
<br />nero-feet
<br />acre-feet
<br />acre-feet
<br />acre-feet
<br />acre-f~et
<br />cfs
<br />cfs
<br />cfs
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<br />21,800
<br />8,650
<br />7,450
<br />1,200
<br />000
<br />lOO
<br />2,756
<br />300
<br />4,l78
<br />4, 171,1
<br />4,159,5
<br />4,159.5
<br />68 feet
<br />95 feet
<br />l,460i feet
<br />384,000 cu. yd.
<br />:;)1,117,607
<br />:;';129,20
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<br />Drun _ Tho potential rolled-earth dam would rise upproximately
<br />68 feet above the streo.mbed und 95 feet ubove the bottom of the
<br />cutoff trenoh, The len!';th along t:,e crest would be 1,160': feet. The
<br />top width would be 25 feet at elevation 4,178. The upstream slopo
<br />would be 3 to 1 protected by 3 feet of riprap to elevution 4,140, tlm
<br />locution of a 20-foot berm, then 4 to 1 to the ground surface. The
<br />do,vnstreum slope would be 2 to 1 to elevation 4,130, 5 to 1 to
<br />elevution 4,115, thence 2 to 1 to the groillld surface. The entire base
<br />of the dC\l1l would be stripped r,nd would have 0. cutoff trench to bodrock
<br />with oenterline 15 feet upstrc<lJll :"rom the "-xiso The trenoh would have
<br />a maximum rlepth of npproximately 47 foet rmd ['. bo;;tom \iidth of .30 -'act,
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