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C. 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 feet
<br /> b. Multiply rock Iayer width by landslope to determine drop
<br /> 1 row[ovn,<''
<br /> in elevation; Slope Difference _ E "R«A,4
<br /> ID x 0 % �' 100 = 0 feet ,,,,,-,I,:..,,,,:..nt ,, ."
<br /> c. Add depth of clean sand depth of clean sand for Upolop.kit -� . ' f "1„1t;s r;;mi'' .:
<br /> separation at upslope edge (2a) to depth of rock layer to Rod Did 0� °'`°P
<br /> rock depth and the depth of cover to find the total mound `ft" p••M•r
<br /> height at upslope edge of rock layer; �`"..
<br /> 2- ft + 1ft +.1 ft = 4 feet
<br /> d. Enter table on page bottom with landslope and upslope
<br /> dike ratio. Select dike multiplier of, 4, 0 Z.sox Io: 1040
<br /> e, Multiply dike multiplier by upslope mound height 4x B IS= 5z45
<br /> to get upslope dike width: , 0"x er = J CD feet 41410x K. r. 6ett.
<br /> f. Add the depth of slope difference (2b) to the upslope
<br /> height to get the downslope height . 4t.' + ) = 4- feet CP88$ +z-7ic z554-
<br /> g. Enter table on page E-18 with landslope and downslope
<br /> dike ratio. Select dike multiplier of .4- •
<br /> h. Multiply dike multiplier by downslope mound height
<br /> to get downslope dike width: 4 x4- = l feet
<br /> i. Mininmum mound width is the sum of upslope dike
<br /> width plus rock layer width plus downslope dike width; .• ; rrr{;r; r{ :/: '... ;ti{::'{ , :::{•'`;: ::r,;.; :.:
<br /> l ft = t;c (o;easgwdik
<br /> + t O ft + I� ft feet R« lScd'tiVidlh� �'�: . . . . . .. . _L�... ...;{:.
<br /> ,.:..,..;;;,t.,,,,,..„;;;.;;;;;,..;;;,:,,::{ '+?ti'ti tiff�1 5:'''�'��y''''"'�•�: '; •
<br /> j. Subtract the Minimum width G.i from the Absorption - - - -:.,: - :,.. 4.
<br /> width F.4 to find the Additional Downslope required for = •..•_,.:_.._ :.:;;;
<br /> Absorption vpsbpe6i61 •'dth 1::`'•;,:;..v:.4,, ...upsiopeDau:w�ath
<br /> ft- ft = feet .::1,4,h0.,....,..,...0,...4."....,......-......;;,
<br /> �Y ;;r{;}.." r'•,}r:;�r'•:'•r ,•::ti'r r ti.;r':•.+:. ,::,..
<br /> k. Add the Additional Downslope required for Absorption;::;;�,., .;r, ':r, ; :iW1io D,'3ia'FV►d111 ` �;
<br /> the Total :11.:1;10:1;::,4:;•;:::,0i':.;::."yq`"" .r"
<br /> to the downslope dike width and recalulate "{' { '''' : :• :'; ' ' K.C. ' : .r`''c
<br /> dike f {t.• r{ ::• ;{ , �:r,+r{;;,;;, : '.;,?;:;+;�� trr•+�tirtti{ '
<br /> Mound Width which is is the sum of upslope ,' t:::
<br /> '.,:N1r%1:%,:1:%t:•r 1;' '.tir::.r:......r:;r::.•:::%:;rr.,r.,r.;I:r
<br /> width plus rock layer width plus downslope dike width " `'
<br /> 'ft + ft + _ft = 42. feet Tout Length_,_,.__
<br /> 1. Total mound length is the sum of upslope dike width
<br /> plus rock layer length plus upslope dike width;
<br /> Ifo ft+ SO ft +J19_,ft = 251 feet
<br /> ..wns opo Ile:opo
<br /> 3:1 4:1 5:1 4:1 711 3.1 4:1 6;1 7:1 8:1
<br /> %slop.
<br /> 0 3.0 ,A,Q_ 5.0 6.0 7.0 3.0 4.0 5.0 60 7.0 8.0
<br /> 1 3.09 4.17 5.26 6.38 7.53 2.91 `3W' 4.76 5.60 6.54 7.41
<br /> 2 3.19 4.35 5.56 7.32 216 2.75 3.57 4.13 S.6 8.79 6.45
<br /> 3 6,14 6.90
<br /> 4 3.41 350 476 6.2.1
<br /> 5 343 5.00 6.67 1� 107 2.9.72 61 3.33 4.00 4.62 5.9 5.3.45 447 4.84 5,46 71
<br /> 6 346 5.26 7.14 9.38 12.07 2.54 3.23 3.15 4.41 4.93 5.41
<br /> • 7 3.80 554 7.69 10.34 13.73 2.48 ' 212 3.70 4.23 4.70 513
<br /> •
<br /> 1 395 5.81 8.33 1154 15.91 2.42 3.03 3_57 4.05 4.49 4.88
<br /> 9 4.11 6.23 9.09 13.04 18.92 2.36 2.94 3.4.5 3.90 4.30 4.63
<br /> 10 429 6.67 10.0 15.00 2333 2.31 2.86 3.23 3.75 4.32 4.44
<br /> 11 4.48 7.14 11.11 17.65 30.43 2.24 2.75 3.23 3.61 3,95 426
<br /> 12 449 7.69 1230 21.43 43.75 2.21 2.70 3.12 3.49 3.80 4,01
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