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. ��./�/1�R (S g R) E-20 <br /> .� <br /> . DOWNSLOPE DIK ; WIDTH <br /> 1. If lat�dslape is 3% or ��lore, subtract rock layer width froin <br /> ldsorption widtll to � �btain minimum downslope dike toe <br /> Z� ft - _/O ft = 1 a ft <br /> . Calculate mound hei� ,ht at edge of rock layer oi� downslope <br /> side; <br /> a. Determine dep h of clean sand fill at upslope edge of rock � Y�,�,.To���.., <br /> � layer: Separatio� /. O feet >���+�'��►� <br /> b. Multiply rock 1 �yer width by landslope to determine drop °�P^��, ���.- <br /> lri elevation; 5 opeDifference orrmvY�ru,vc�.,s,.or��,o,xx�Kw��r,�� <br /> 8 !/YLRtNC[.__IIOOr__'.•_.._. <br /> /o : . 6 °Io -�- 100 = o. 6 ft „�e. � <br /> c Add depth of c ean sand deplh of clean sand for <br /> separation at d �wnslope edge to depth of rock layer to � � ' <br /> deptll of soil ba kfill to get mc�und heigllt at downslope � <br /> edge of rock la�, er; � <br /> /, o ft + /. o _ ft + �D ft+ O, 6 ft = .�, 6 ft . <br /> d. L'nte'r table on �age �-18 witli landslope and downslope <br /> dike ratio. Sel� ct dike multiplier of S. Z 6 <br /> e. Multiply dike �;iultiplier by downslope mound height <br /> to get downslo �e dike width: S 26 x .3. G - /�9 ft <br /> g. Compare the v �lues of step G.1 and Step G.2.f. Select the <br /> greater of the t� �o values as tlle downslope dike width; <br /> /�• � ��.'t Kock I�ycr width(dI) <br /> -- h. Calculate upslc�pe dike widlh using upslope mound <br /> height and ups'.ope dike mulliplier from page E-18; <br /> . �. � X�•`J = /r / f t Upslope d Ikc widih(h) <br /> i. Total inound v� idth is the stim of upslope dike width plus °"`""''<',".�'k°,°""h',, <br /> rock layer wid�h plus downslope dike width; <br /> g• 7 ft + io.o ft + �� 9 ft = .�� 6 ft <br /> 3. If landslope �s 2.9 per�:ent or less; basal width includes both the <br /> upslope and downsl� �pe dike,widths. <br /> a. Calcult�te dow�islope dike width using steps G.2.a. <br /> throu�h G.2.f; feet <br /> b. Calculate upslc�pe dike widlll using upslope mound <br /> heigllt and dik�� multiplier from Page E-18; <br /> x ft = ft <br /> c. Add downslo��� dike width to upslope dike widlh to rock <br /> layer width <br /> ft + ft + ft = ft <br /> E-18 <br /> - oWns�P� -� ps oy� <br /> ]:t � Sd 6:1 70 7,1 4•.1 1 6:l 6:1 70 �i1 <br /> R sl.>�+e <br /> 0 J.0 �.0 � 5.0 6.0 7.0 3.0 1.0 5.0 6.0 7.0 8.0 <br /> -� 1 �.p9 � � '� 4.17 526 6�8 75) 2.91 3.85 �.76 5.66 654 7.41 <br /> 2 3.19 6J5 556 6.82 8.16 2.83 J.70 !SI SJ6 6.14 6.9U <br /> J lJ0 �54 5.88 7J2 8.86 2.75 357 435 SAB 5.79 6.l5 <br /> 1 3.41 4.76 625 7.89 9.72 2.68 �.lS {.17 �.N4 S.�b 6.06 <br /> 5 l57 5.00 6.67 857 10.77 2.b1 33J 4.00 4.62 5.19 5.71 <br /> '"(;" ).66 526 7.14 9J8 12.1Y/ 256 713 3.85 IAt �.93 5.41 <br /> ..7 3.80 T556 7.G9 I0�4 1J.77 2.48 �).12 3.70 �.23 �.7U 5.13 <br /> A 3.95 S.BB 813 1156 15.91 2.62 J.OI �57 4.Q5 {.49 4.88 <br /> ' 9 d.11 625 9.09 13.04 18.92 236 2.9d 3A5 7.90 �3� �.65 <br /> 10 C.29 6.67 10.0 15.00 27�3 231 2.86 J33 3.75 4.12 4.64 <br /> ll 4.48 7.14 11.11 17.(S 30.47 226 2.78 3.7J ).61 3.95 126 <br /> 12 A.69 7.69 _ 1250 21.4J 47.75 2.21 2.70 3.12 J.09 3.BQ 6.08 <br />