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E-20 <br /> 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 /> ZO ft-_/ft= /0 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 NOU <br /> layer: Separation V I3� feet <br /> b. Multiply rock layer width by landslope to determine drop - <br /> in elevation; Slope Difference 2WMRSMM-LOPetinrROCRMforM <br /> /0 x 1 %+ 100= 7 ft , <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 /> ift +Jft + 1 ft+ ft $ ft <br /> d. Enter table on page E-18 with landslope and downslope <br /> dike ratio. Select dike multiplier of S-1 S <br /> e. Multiply dike multiplier by downslope mound height <br /> to get downslope dike width:� = z/ 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 /> 2 I feet Ro&leyer wwth(d21 <br /> h. Calculate upslope dike width using upslope mound <br /> height and upslope dike multiplier from page E-18; e��17:: <br /> -211 X -3. 1" /Oft Up.bpe dike width(h) <br /> L Total mound width is the sum of upslope dike width plus Downslope dike width(e) <br /> rock layer width plus downslope dike width; <br /> /D ft+1Q ft+ Z/ ft= AL-ft <br /> 3. 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 /> Vownslope Upsiope <br /> 3:1 41 5:1 6:1 7:1 3:1 41 5:1 &1 74 8:1 <br /> s elope <br /> 0 3.0 4A 51) 6.0 7.0 3.0 4.0 SA 6.0 7.0 8A <br /> 1 3.09 4.17 576 638 753 2.91 US 476 SA6 6S4 7A1 <br /> 2 3.19 435 S56 682 8.14 253 370 454 536 L14 L90 <br /> 3 330 454 598 732 8l6 2.75 357 435 Sm 5.79 6A5 <br /> 4 3A1 476 675 7M 9.72 2A8 3AS 417 454 SA 6A6 <br /> S 353 SAO 667 857 10.77 2AI 333 4.00 4.62 519 571 <br /> .13 <br /> 3US 4AI 03 SAI <br /> � 633 1154 1S7A9 1034 � 2A2 434) 3S7 4A5.70 4M4A709 4AS <br /> 9 4.11 62S 9.09 13.04 18.92 236 L94 3AS 3.90 430 4A5 <br /> 10 479 667 10.0 15.00 7333 231 256 333 3.75 412 4A4 <br /> 11 4.48 7.14 11.11 17AS 30.43 276 278 323 3A1 3.95 476 <br /> 12 4.69 769 1250 21.43 43.75 1 211 270 3.12 3.49 320 4A8 <br />