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' • G. ' DOWNSLOPE DIKE WIDTH <br /> 1. If landslope is 2.9 percent or less,basal width includes both the <br /> upslope and downslope dike widths, <br /> 2. Calculate minimum mound size based on geometery: _, <br /> a. Determine depth of clean sand fill at upslope edge of rock <br /> layer: Separation + I. 0 feet " <br /> b. Multiply rock layer width by landslope to determine drop <br /> 401 <br /> in elevation; Slope Difference .6...e..... <br /> JD x g2. %+ 100 = • feet <br /> F 11n18rr <br /> c. Add depth of clean sand depth of clean sand forillt <br /> w+•1• <br /> separation of upslope edge(2a) to depth of rock layer to-`- <br /> rock depth and the depth of cover to find the total mound -``" <br /> height at upslope edge of rock layer; --Am ...r..........6 <br /> 1.0 ft + 1 ft + 1 ft = 3-0 feet . <br /> d. Enter table on page bottom with landslope and upslope <br /> dike ratio. Select dike multiplier of 3 .7 <br /> e. Multiply dike multiplier by upslope mound height -- <br /> to get upslope dike width: 3. 0 x,' .7 = 11 , feet <br /> f. Add the depth of slope difference(2b) to the upslope <br /> height to get the downslope height 3.D + • =_,3.2 feet <br /> g. Enter table on page E-18 with landslope and downslope <br /> dike ratio. Select dike multiplier of 4.3f <br /> h. Multiply dike multiplier by downslope mound F eight <br /> to get downslope dike width: q.3Sx 3. = i 4 feet <br /> i. Mininmum'mound width is the sum of upslope dike <br /> width plus rock layer width plus downslope dike width; :�•::V:•_:::;::::�•r�•:::� <br /> + I c.� U D►lt1 Widtl::. r t.. <br /> /1 ft /U ft + • ft= 3 S feet R« era wdi• �:.�h.''':: �� -�-•� : :•: <br /> j. Subtract the Minimum width G.i from the Absorption :•:::: • .•::.:.:t. <br /> width F.4 find . .V. <br /> to the Additional Downslope required for 4 r' <br /> Absorption :: <br />