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E-20 <br />13. DOWNSLOPE DIKE WIDTH <br />1. If landslope is 3% or more, subtract rock layer width from <br />�- adsorption width to obtain minimum downslope dike toe <br />20.0 ft - /0 ft = /a, o ft <br />2. Calculate mound height at edge of rock layer on downslope <br />side; <br />a. Determine depth of clean sand fill at upslope edge of rock <br />layer: Separation /. 2 feet <br />b. Multiply rock layer width by landslope to determine drop <br />in elevation; Slope Difference <br />c. Add depth of clean sand depth of clean sand for <br />separation at downslope edge to depth of rock layer to <br />depth of soil backfill to get mound height at downslope <br />edge of rock layer; <br />/, 2 ,ft + /, o ft + /. o ft+ V. Y ft = 3, a ft <br />d. Enter table on page E-18 with landslope and downslope <br />dike ratio. Select dike multiplier of S! 76 <br />e. Multiply dike -multiplier by downslope mound_height <br />to get downslope dike width: Y. 76 x j?. 6 =. /7. / ft <br />g. Compare the values of step G.1 and Step G.2.f. Select the <br />greater of the two values as the downslope dike width; <br />17,1 feet <br />h. Calculate upslope dike width using upslope mound <br />height and upslope dike multiplier from page E-18; <br />2 x 3, S = //.oft <br />i. Total mound width is the sum of upslope dike width plus <br />rock layer width plus downslope dike width; <br />//. G ft + /o ft + /7. / ft = 39. / ft <br />13. If landslope is 2.9 percent or less, basal width includes both the <br />upslope and downslope dike widths. <br />a. Calculate downslope dike width using steps G.2..a. <br />through G.21, feet <br />b. Calculate upslope dike width using upslope mound <br />height and dike multiplier from Page E-18; <br />x ft - ft <br />C. Add downslope dike width to upslope dike width to rock <br />layer width <br />ft + ft + ft. = ft <br />.TOPSOM..I <br />fLO►•t tee I MOCK "Urrt! <br />Nark layer width (d21 <br />UNbM dice width W <br />Oodtutd W d Ike width (. <br />3:1 <br />5:1 <br />5:1 <br />0 <br />3D <br />4.0 <br />$O <br />7A <br />7A <br />2.11 <br />LA <br />32i <br />$O <br />476 <br />6A <br />SA4 <br />7A <br />134 <br />1A <br />?At <br />1 <br />3A1 <br />d.17 <br />$26 <br />�729 <br />7" <br />9.14 <br />23,1 <br />370 <br />�31 <br />$3� <br />k11 <br />1•W <br />2 <br />3 <br />3 <br />3.11 <br />330 <br />e3S <br />eS.L <br />SSL <br />6AS <br />S.S1 <br />US <br />337 <br />SAS <br />�31 <br />1.17 <br />1A1 <br />eM <br />17f <br />JA1 <br />•AS <br />6A1 <br />3A1 <br />17i <br />13f <br />SA <br />S72 <br />f0.77 <br />IAS <br />2A1 <br />333 <br />LAD <br />1A2 <br />1.11 <br />1.71 <br />fAt <br />S <br />• <br />3S3 <br />]As <br />Sm <br />S2s <br />1A7 <br />7.0 <br />f3S <br />12A7 <br />231 <br />323 <br />3.12 <br />SAS <br />37D <br />ul <br />123 <br />d.f1 <br />470 <br />$.13 <br />1151 <br />1373 <br />IL91 <br />SAS <br />2A2 <br />3z <br />337 <br />L.fi <br />1.Lf <br />L30 <br />4M <br />LAS <br />1 <br />Y <br />3.�i <br />1.11 <br />SL <br />i25 <br />S33 <br />ID1 <br />11-% <br />tS.q <br />231 <br />231 <br />Lid <br />2311 <br />SAS <br />133 <br />1.90 <br />37S <br />••l2 <br />4A4 <br />10 <br />421 <br />1A7 <br />IQA <br />17AS <br />2333 <br />3>lA3 <br />226 <br />2.75 <br />1� <br />3A1 <br />1.41 <br />7.1f <br />3.10 <br />426 <br />e a <br />11 <br />. i <br />4AS <br />a Le <br />7.1• <br />7 % <br />11.11 <br />1230 <br />21.41 <br />43 75 <br />2 1 <br />2.70 <br />-? <br />