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Otto Associates, Engineers and Land Surveyors, Inc. <br /> F. ABSORPTION WIDTH <br /> 1. Absorption width equals absorption ratio(see Figure D-33)times rock layer width <br /> 2.67 x 10.0 ft = 26.7 ft <br /> G. MOUND SLOPE WIDTH&LENGTH(Greater than 1%) <br /> 1. Downslope absorption width=absorption width minus rock layer width <br /> 27 feet - 10 feet= 17 feet <br /> 2. Calculate mound size <br /> UPSLOPE <br /> a.Determine depth of clean sand at upslope edge of rock layer=3 feet minus distance to restricting layer(C1) <br /> 3 ft - 1.67 ft= 1.33 feet <br /> b.Mound height at the upslope edge of rock layer=depth of clean sand for separation(G2a) <br /> at upslope edge plus depth of rock layer(1 foot)to depth of cover(1 foot) <br /> 1.33 ft+1 ft+1 ft= 3.33 feet <br /> c.Upslope berm multiplier based on land slope,(see figuT;D-34) <br /> Select berm multiplier of 3.7 <br /> d.Upslope width=berm multiplier(G2c)times iipslope mound,helght(G2b): <br /> 3.7 x 3.33 It = 12.3 feet <br /> D-0 A. SLOPE MUl T1P1.19RTAf1JX <br /> Lmd LTraor -II tl4 TA1 <br /> $10 VAdG lebi�afautuioaa �+irul.Ypi S wioMk <br /> is pc r�ios slope <br /> 7r 1 <br /> 0 3A 4A S.0 6.6 7.0 8.6 3.0 4A SA 6.0 7.0 <br /> 1 2.411 SJS 4.76 SAA 6.54 7 3I 3A9 4.17 SIA 6.38 7.53 <br /> 2 291 3.76 434 5J6 6.14 696 3.13 43S.:. 5S6 ; 692 8.14 <br /> 3 In 3.57 435 SAO SX9; 6.43 331! 454 S98 7311 8.86 <br /> 4 2A5 3.45 417 494 SA6 6A6 $.41 476 6.25 WK 9.72 <br /> 5 2.61 3.33 406 4.62 539' On " 3.83' SAd; 6.67; 8W 18.77 <br /> 6 254 3.23 395 4.41 491' 5.41 'T 3.66' 526 7.14 936 1207 <br /> 7 2A8 L12 3.76 4.23 4.76 S.13 190 556 7JA 10.34 1333 <br /> 1 2.42 303 357 4AS 4A-9 498 3.45 �SAO 8.13. 1154 1591 <br /> 9 234 2M 3AS JA9 4.W 4A5:-,j 4.11 6:25' 9 d3 13A4 iS92 <br /> 10 Z31 286 333 396 4.12; 4.44 .a 4.Z9 8.69 1`100 1506 2331 <br /> 11 2.26 2.76 3.2E 3.63 30S 4.26 _ 4AS 7.14 1L11 17.65 30.43 <br /> i. <br /> 12 U1 2.70 3.12 e3A8 3.00 4M 400 7 9.;' 'i33tD; AL4,# 0.',5 <br /> DOWNSLOPE <br /> e.Drop in elevation=rock layer width(D2)times percent landslope(C5)/100 ` <br /> 10 ft x 7 "'i" :'k 1160= 0.7 feet <br /> f.Downslope mound height=depth of clean sand for slope difference(G2e) <br /> at downslope rock edge plus the mound height at the upslope edge of rock layer(2b) <br /> 0.70 ft + 3.33 ft= 4.0 feet <br /> g.Downslope berm multiplier based on percent land slope(see Figur D-34) 7.69 <br /> h.Downslope width=downslope multiplier(G2g)times downslope mound height(G2f) <br /> 7.69. x 4.0 ' = 31.0 feet <br /> I.Select greater of G1 and G2h as the downslope width 31.0 feet <br /> j.Total mound width is the sum of upslope(G20 width plus rock layer width(D2)plus downslope width(G2i) <br /> 12.3 ft+ 10.0 ft+ 31.0 ft= 53.3 feet <br />