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67/21/2004 14:01 3262382343 HENTGES PAG� 07/�4 <br /> G. dOWNSI�PE BERM WIDTM (Slope � 1%) <br /> 1. Slope: 5.0 If landslope is 1°� o�more, subtract rock layer width fram <br /> �dsarption width to obtain minimum downslope berm toe: <br /> 24.0 ft minus 10.� ft rock = 14.0 Foot minimum adsorption area <br /> 2. Calculate minimum mound size: <br /> a. Determine depth of clean s�nd at upslope edge of rock layer: <br /> From Site Evaluation step C1: 1$.0 inches clean s�nd <br /> b. Add depth of clean s�nd (2a) at upslope edge, plus•1 foot of rock plus 1 foot <br /> af cover to get mound height at upslope edge or rock layer. . <br /> 1 S.0 in / 12 = 1_50 feet + 1 ft + 1 ft = 3.50 fee�upslope height <br /> c. Enter tabte with landslope to get uplsope berm multiplier of 3.33 ' <br /> d. Multiply berm multiplier 2c by upslope mound height 2b to get uplope berm width: <br /> 3.33 X 3.50 equats 11.7 feet upsiope berm width <br /> e. Multiply rock layer width D2 by landslope to get drop in elevation: <br /> 1 d.00 feet X 5.0 %slope = SQ.OQ / 100 = 0.5Q feet <br /> f. Add depth of clean sand for slope differen�e 2e at dawnslope edge, to the <br /> mound height at tt'te upslope edge of rock layer 2b to find downslape height: <br /> 3,50 feet + 0.50 feet = 4.00 f�eet downslope height <br /> g. Enter t�ble with landslope and dawnslope berm multiplier of: 4.29 <br /> h. Multiply berm multiplier by downslope mou�d height to get downslope berm width: <br /> 4.29 feet X 4.00 equals 17.2 _feet dawnslope berm width <br /> i. Compare values of step G1 14.0 ft 8 G2h 17.2 ft <br /> The greater of the finro vakues 17.2 is the dov+rnslope berm width <br /> j. Total maund width is the sum vf upslope berm width G2d, plus rock (ayer width <br /> D2, plus downslope berm width G2i: <br /> 11.7 feet + 1 Q.0 feet + 17.2 feet = 38.$ ft wide <br /> k. Total mound length is the sum of uptsape bermwidth G2d, plus rock layer length <br /> D3, plus upslope berm width G2d: <br /> 11.7' feet + 62.3 feet + 11.7 feet = 85.fi ft long <br /> i. FINAL M�UND DIMENStON IS: 38.8 ft wide X 85.6 ft lon <br /> SLpPE SLOPE MUL'CIPLIER PSLOPE MUL7IPLIER <br /> 3701 4T01 3Tp1 4t01 <br /> 3.00 4.00 3.00 4,00 <br /> 1.0 3.0� 4.17 291 3.85 <br /> 20 3.19 4,35 2.83 3.70 <br /> 3.0 3.3D 4.54 2.75 3.57 <br /> 4.0 3.41 4.76 2.68 3.45 <br /> 5.0 3•53 5.00 281 3_33 <br /> 9.0 3.88 5.28 2,54 3.23 <br /> 7,0 3.80 5.58 2.48 3.12 <br /> 8.0 3.85 5.e8 a.a2 3.03 <br /> 9.0 4.11 6.25 2.38 2,94 <br /> 10.0 4.� 6.6? 2.31 2.86 <br /> 1 t.0 4.48 7,14 2.28 2.76 <br /> 1z.o a.� 7.8a 2.21 z.7o <br /> PAGE S O� 1� <br />