Laserfiche WebLink
<br />. <br /> <br />. <br /> <br />. <br /> <br />00105(; <br /> <br />Outlet Works <br />-- <br /> <br />A controllod outlot would be neecled for discharge of irrigation <br />-,'!o.ters. The outlet works ~ould be placod in 0. trench on the right <br />abutment. It would consist of a reinforced concrete conduit about <br />(45 feet long, with Q tr~s"x~ck structure set over the conduit nc~r <br />the upstream o~1d, a vertical access shaft from the crost of the dam <br />to Q gate-chanber centninin~' gates in a plug, ~nd Q stilling-basin at <br />the outlet. Excavation for the strueturo would be earried to a suitable <br />found~tion Clnd then 1:;Clckfilled with rolled material to tho elevation <br />desired for the found[\tion. The conduit would have a dimneter of 3 <br />. f'eet 9 inches, [\ shell thickness of 12 inch,s, and a flat base, C1.!t- <br />off collC1rs on approxim[\tely 30-foot centers would extend 30 inches <br />into the backfill ~nd prevent soepClf,e along tho b~rrol. Tho trashrack <br />str1'cture \'Iould be a,'proximc.tely 8 fect square o.nd 6 fect high y,i th <br />b~rs on all sidcs and topo It would rest on a circul~r shaft 10 feet <br />abovc the invort of tho oonduit. The accoss shaft would be located at <br />tho upstrccJ1l edge of the crest of the dnm, A sm~ll fill on the face <br />of' the d~m ';Iould provide a berm around the structure. The shaft would <br />be 5 feet in dio.metor and 60 to 65 feet dcep. Tho IOl'ler part ef treo <br />shaft would be enl~rged to 10 feot in dic.metcr for a gate-chnmbor ,'!hieh <br />would contain 2-foot 2-ineh by 2-foot 3-inch high-prossuro gates !,l~ccd <br />in ta,"dcl!1. The gatos, with the usual trnnsitions, would bo plc.ced in <br />a conoroto plug~ The shaft c.nd plug "!ould rest on a special reinforccd <br />concrote bc.se ~bout 22 feet long. A oontrol houso, ClDproximately 14 <br />feet square and 10 feot high, would protect the top of the shc.ft, <br /> <br />The discharge from the conduit would bo into c. stilling-b~sin 5 <br />fect wide. The total length of' tho struoturo would be 100 feet. It <br />I'IDuld havo a maximum depth of 11-1/2 feot for c. distance of 40 feet. <br />Forty foet of the upstream section l'Iould be 0. tr~,sition with a floor <br />on a ,P'lrabolical curve nnd with sido llUlls vnrying in depth from 5 to <br />1l,.,j,/2 feet. The downstreCJ11 20 fect wculd chango in dopth lmiformly <br />from ll-1/2 feet to 5 feot ':11101'0 it connects with thc outlet channel, <br />A cutoff \"Iall at thc ond of the structure would prevent undercutting. <br />An oarth chn.11l:C31 would oonvey tho water to Dry Creek. The oh..'UU101 <br />llOUld "be about 250 feet len~, with" oottom width ef 5 foot, depth of <br />15 to 20 foot, and apprcxi~~tcly 1~2 to I side slopcs. Riprap would <br />bc placod as rcquirod. Tho cc.pacity of tho outlot works would be 100 <br />ofs \"lith the reservoir water surfC\co o.t elova.tion 4, 12~.5. Tho <br />d.ivorsion capr.city would bo 300 cfs \'!ith the water surface at 4,150, <br /> <br />The slrGam.'~lo\'ll v!(ltlld be cared !"'or during construction by <br />e;:co.vating a channel from TJr-.r Creek to the inlet of "..he outlet con- <br />c.ui-t and building cofferdams above and telow tlm dnmsite. The <br />diversion chann'31 vlOuld. be about 200 feet long, 12 feet deep, ~~11d <br />would ;1[\Ve a bottom '1Jidth of 5 fect. Tl,e wide slopes !\'Quld defend on <br />the rK\.JcC'riG.l en00ullterecl :..~nd a.re cstiT!1l',tcd as 1-1/2 to 1. Reservoir <br />clos'..:.re Ho'y~ld be Flo.de by :::;top-logs 0r ::;'. GCete ut "t\e inl'Jt of the <br />cOl1lll.~it" ccnstructio~ of 2" cOl1c~"etc plug and. eIbovJ at th~ b3.se of tl18 <br />trasl;,r8.ck: .struaturo, o.n(l th~ il1G-t~f~ll[\tion of' tho gntes and i.Jlug e:t the <br />l;l.CCGSS shu:r-t. <br /> <br />55 <br />