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G. Downslope Berm Width l. If the landslope is 1°'0 or more, subtract the rock layer width from the absorption width to obtain minimum do�vnslope berm toe: 27 - 10 = 17 feQt minimum downslope. 2. Calculate the minimum mound size: a. Determine the depth of clean till at the upslope edge of the rock layer: (required seperation) 3' - 2' = 1 feet b. Add the depth of clean sand for 2a, the depth of the rock laver, and 1' for the topsoil cover needed to determine the mound height at the upslope edge of the rock layer; 1 - 1 =1 = 3 c. Szlect the table multiplier for the upslope berm based on land slope against�:1 berm slope. 3.?3 d. ivlultiply the berm multiplier by the upslope mound height to determine the upslope width; 3 � 3.23 = 10feet e. �lultiply the rock layer width by the landslope to determine the elevation drop; (10Y6)/ 100 = .6feet f. Add the depth 2e to 2b to detertnine the mound height at the downslope edge of the rock layer; .6 = 3 = 3.6Feet g. Select the ta.ble multiplier for the downslope berm based on the land slope against 4:1 berm slope. �.?6 h. Multiply the berm multiplier for the downslope mound height to determine the downslope width; Land Downslope Upslope 3.6 Y �.26 = 19 feet slope berm multipliers berm muitipliers i. Compare the values in G.1 'n°�° for given ratios for�iven ratios � (17 feet) and step G.?h (20 feet). Select the �eater of the two values 4:1 ':1 4:1 �:i � as the downslope berm width; 19 feet. o �.00 s.00 �t.00 �.00 j. Total mound width is the sum 1 4.1� �.;6 ;.gs =�.�6 of G.2d, D.2 and G.2i; 10 � 10 + 19 =39 feet. '- ��5 5.56 3.�0 =�.5=� i k. Total mound length is the sum � 4.54 s.sg 3.s� �.3s of G.?d, D.3, and G.2d ; 4 a.75 625 �.4s �.�� 10 = �0 + 10 = 70 feet 5 s.00 6.67 �.�3 a.00 Final Dimensions of the 1�Iound 6 5.26 �.�4 323 �.ss 7 5.56 7.69 3.12 3.70 39 feet bv 70 feet 8 S.s$ 8.33 3.03 �.s� 9 6.25 9.09 2.94 3.�5 10 6.67 10.00 2.86 3.33 11 7.14 11.11 2.78 3.'=3