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G. DOWNSI.OPE BERM WIDTH �'°p`���." �°""'�
<br /> 1. If landslope is 1% or more, ,�.;. �.:.x:::x;;x,::�.�,,..f 4'.��;
<br /> f� .c�h �w,x :a :�';
<br /> subtract rock layer width from adsorption width ;•,t?;d-;Y:�,' �,. ;�..a. ,'�::K�-.:A;,.,:
<br /> .. ... , ,.�
<br /> to obtain minimum downslope berm toe ., a�,s.,,a� ��:--,r � - ;, �>� f� ����rr;�>,,
<br /> - 6'Topsoil
<br /> �U, ft - ► � ft = -L�.- feet �c�soa U�� -
<br /> 2. Calculate Minunum mound Size � ��
<br /> a. Determine depth of clean sand fill at U��°p` 'dw
<br /> upslope edge of rock layer: �d�' Absosptl�Width
<br /> Separation 3' - /, � ft = �� 3 feet
<br /> b. Add depth of clean sand for separation (2a)
<br /> at upslope edge, depth of rock layer (1 foot) to depth of cover
<br /> (1 foot) to find the mound height at the upslope edge of rock layer;
<br /> /. 3 ft +�lft + lft = 3 -3 feet ' � -
<br /> c. Enter table with landslope and upslope berm r ` :;� ups` l�W'►aw� . _ .
<br /> ratio. Select berm multiplier of �,s`� �;l�s �.:. . �K.,�.:` '; "� � � . `� �
<br /> :.;U sIo Width;i:�c ;�:?aY, ' RocicBed ?a�?ax41a�::x,.�UPslo Width°�:'�:
<br /> d. Multiply berm multiplier by upslope mound �.� .. ;,: �:r��*'� 'nsa�, -[�5�:��Qb�°`� � :,:�.
<br /> _•�� 4�4�� 0..
<br /> height to find upslope berm width: �R � .`�.;.`'-. `°��'��` �' -��Q�� �.'. �, �;���""�� �
<br /> 3'I r.. � 1 i h� .,:....`v� , ,� . „
<br /> i.. �
<br /> 7. 3•� _�feet � . � ti',�-��`�����'a�,;�-���s ���r�� �r ���t,, ,w��r ���,,��,�,�J,�7�,,y,� , ,� �.
<br /> �X � • .p�� rt . tc ti � l� :�, M t''�i�t \ � C� .,� R .
<br /> �" r.. � ,;�,t" tir�(�'' br7i�� r,*ar7�r�7�:�Fi��(�� 1�,�� � �� i_ �'
<br /> e. Multiply rock layer width by ` ' 7 � '^' -_�_',��. ,.n`J�� � . ...� x � � '
<br /> � i^ ��,� � (i �.h�) �Y l.nr��, . �l�!ti.. i , �.:r
<br /> 4 . ' �,�4 Ww1W� It'4� � I �.�
<br /> landslope to determine drop in elevation; F � ��, � � �` `''
<br /> , ,��c�n w���� �
<br /> � �
<br /> � , �� � ,� ,„ , .,. � ,
<br /> /�x �.%+ 100 =�_feet � T ,' y , ,{ c i ,�: �,, ,.,, �
<br /> ,.
<br /> ., . ,
<br /> �: .�.;. ..�..:.�... �. .J.�p� µ (Ai���..,t1 l;�i.ri,:ti . :.. , ..:d�
<br /> f. Add depth of clean sand for slope ro�u„�, ►►�
<br /> difference (2e)at downslope edge, to
<br /> the mound height at the upslope edge
<br /> of rock layer (2b) to find the downslope height;
<br /> 3.3 ft + •�_ft= 3,� feet
<br /> g. Enter table with landslope and downslope berm ratio. Select
<br /> berm multiplier of 5.a� .
<br /> h. Multiply berm multiplier by downslope mound height to get
<br /> downslope berm width:
<br /> S.�� x 3,�7 = �1_ feet BF.RM SLOPE MUL'I'IPLIERS
<br /> i. Compare the values of step G.1 1 �
<br /> and Step G.2h�_ L'°d ���r� n��u�°,�i.�
<br /> Select the greater of the two values as the �� �►�w�� °"m�►°��'"°`
<br /> downslope berm width; �� feet
<br /> j. Total mound width is the sum of o 3.o a.o s.o 6.0 �.o �.o a.o s.o 6.0 �.o s.o
<br /> upslope berm (G.2C�� l 3.09 4.17 3.26 6.38 733 2.9I 3.85 4.76 5.66 6.54 7.41
<br /> width plus rock layer width (D.2) z 3.�9 a.3s s.s6 6.s2 a.ia z.ss s.�o a.sa 5.36 6.ia 6.�0
<br /> plus downslope berm width(G.2i); s 3.�o a.sa s.sa �.sz a.sa z.�s s.s� a.�s s.os s.�9 b.as
<br /> �/_ft+�ft+ �._ft = �.�,. feet a s.ai a.�a s.zs �.a9 9.�z z.ae 3.as a.i� a.sa s.aa e.o�
<br /> k. Total mound length is the sum of upslope s s.ss s.00 6.67 ss� io.r 2.6i 3.33 a.00 a.e2 s.i9 s.��
<br /> berm width (G.2d) plus rock layer length (D.3) 6 3.66 c�s��� zia 9.38 ►�.m �i_sa��3.z� � s.ss a.a� a.93 s.a�
<br /> plus upslope berm width (G.Z.C��; � 1.80 5.56 7.69 10.34 13.73 2.48 3.12 3.70 4.23 4.70 5.11
<br /> �-� ft + �s� ft + � ft = 31- feet S 3.93 s.as 8.33 i�.sa �s.9� x.az �.o� 3.s� a.os a.a9 a.sa
<br /> �,1 -� •)� ,+ 1�� ' I ( -� 9 4.1 I 6.25 9.09 13.04 18.92 2.36 2.44 3.45 3.90 4.30 4.63
<br /> 10 4.29 6.67 10.00 I3.00 23.33 2.31 286 3.33 3.75 a.12 4.aa
<br /> Final Dimensions. << 4.48 7.14 It.11 17.65 30.43 Z26 2.78 ).23 3.61 3.95 4.26
<br /> , 12 4.69 7.69 1250 21.43 43.75 2.21 270 3.12 3.49 3.80 4.08
<br /> 3 g X /o `1 �a��::.
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