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<br />flo... the reservOir level will have nsen to eievallon 6014 5, the 100 <br />01 the fuse plug and any Increase In tlo... '...II! wash outlhe fuse <br />plug allo''''lng the auxlharv Spillway to opera;e <br />Water tor Ireatmenl""llI enter Ihe Footnllls funnel ihraugh an <br />Inla;"e tower located on tne nght abutment upstream 01 me dam <br />The to....er ,.,111 have tour galed openings each 75 fl wide by 15 <br />It high They Will be localecl al succeSSlvel'llower levels 10 aHow <br />selective wltharawals tram dlr.erent reseNDlr depths A second <br />Intake tower kx:ated 82 It from the !Irs! and hlQher on me nght <br />bank '''''In serve the C:l'y at Aurora waler system It will be OOUlpped <br />....Ith two Side gates operating under balanced head <br /> <br />Site GernogV <br /> <br />Because a! the higher lOads placed on a smaller loundaton area <br />geologIC conSlderallons are even more Important In arCh dam <br />SIting than tor other types a! dams At the Strontla Spnngs SIte <br />46 bOre holes totaling 7,522 11 .....ere dnlied and tested under <br />Harza s dlrectl()n dunng the predesqn and design stages ThiS <br />detallea drilling program identified a shear lOne Uf1(ler the lower <br />Ihlrd of [he nght abutment and beneath the valley tloor whICh <br />would have Inlroouced conSIderable foundation problems If the <br />dam were b\JIlt atlhe original locallon FourtE!€n addlllonal holes <br />were drlHed to define the downstream limits of Ihe Shear lOne <br />and to Check the posSlt)liIly 01 a downstream adjustment of the <br />dam aJl.rS II was lound that by moving the a"'ls 135 It downSlream <br /> <br />CIo~-upolmeconlraclfOflfOlm laa;>sevaralmgtugh block No lOarlQ <br />JowOlOCl< No 9 shows me aClual mlCkness ottheOam neijrcrest <br />elevaliOll Groul SlOPS can De seen piOlrU(jlr/Q from me contraclJOll /OInT <br />fac.e Waler hoses lor PJS1COO1lng 01 concrete can Of:' seen susrended <br />on the downSlream lace <br /> <br /> <br />8 <br /> <br /> <br />Curved 1000ms being Used'fl SDtllwav constructIOn to obtain a Ski-lump <br />sha0f' mal ....iU /fIrow /he waler Imo I!'le plunge pool whlCl'llS e1C;.;;waIOO' <br />from /he dOLNnSlream rrver Channel <br /> <br />!he foundation problems could be minimized WIlt10ut changing <br />the dimenSions or geomelry of the dam sIQnlhcanlly <br />The bedrock at the site IS a mtgmallte comple'" ot coarse- <br />grained Igneous (granitIC) rock. and foliated (layered) melamOf- <br />ptllC rocks The foliated structure results In a pronounced set of <br />partlngs In the rock mass In addition. the rock is Inlersected by <br />two ...'ell developed sets at taintS Smalllaulls are also present. <br />but !he e",posed bedrock shows no eVidence of Widespread <br />tauitlng <br />The entire dam toundallon area Will be consolidated by grout. <br />Ing Underseepage and uplil1 pressures Will t€ controlled by a <br />grout curtain and a Irne of drain holes downstream of the graul <br />curtain leading Into an Internal drainage gallery running paral~1 <br />fa the base 01 Ihe dam The steeply downstream diPPIng shear <br />zone benea/h the cenlral ponlOn of the dam loundatlon Will be <br />lreated wl!h a multiple-row grout cunaln and aU)lltaf). drain hOles <br /> <br />Design of the Dam <br /> <br />The d€SlQn 01 the arch dam IS basea on the results at two In- <br />dependent types of analy5ls the complete trial load methocl and <br />the three.dlmenSlonal flMe element method The analyses were <br />earned out tor the folloWing loading cases <br /> <br />1} a Normal pool elevation 6002 plus dead load plus temper. <br />ature plus lCe load plus Sill <br />b, Minimum ~I elevatiOn 5935 plus dead load plus tem- <br />perature plus Ice load plus Silt <br />