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CT. DOWNSLOPE DIKE WIDTH <br /> 1. If landslope is 3% or more, subtract rock layer width from <br /> adsorption width to obtain minimum downslope dike toe for <br /> absorption: ; <br /> 2�.L ft- /U ft = 1 '? . feet t <br /> 2. Calculate minimum mound size based on geometery: <br /> a. Determine depth of clean sand fill at upslope edge of rock <br /> layer: Separation /. U feet <br /> b. Multiply rock layer width by landslope to determine drop <br /> in elevation; Slope Difference t' <br /> /D x %,- 100 = 6-2 feet <br /> c. Add depth of clean sand depth of clean sand for <br /> separation at upslope edge (2a) to depth of rock layer to °=W ` <br /> rock depth and the depth of cover to find the total mound °° ""'" <br /> height at upslope edge of rock layer; <br /> ), y ft + 1 ft + 1 ft = 7.13 feet <br /> d. Enter table on page bottom with landslope and upslope <br /> dike ratio. Select dike multiplier of a .ate <br /> e. Multiply dike multiplier by upslope mound height <br /> to get upslope dike width: ,2.U x _ / i-� feet <br /> f. Add the depth of slope difference(2b) to the upslope <br /> height to get the downslope height <br /> Z .�:' + , " = 7, t , feet <br /> g. Enter table on page bottom with landslope and <br /> downslope dike ratio. <br /> Select dike multiplier of S•a (.. <br /> h. Multiply dike multiplier by downslope mound height <br /> to get downslope dike width:-Z. (,. x 5.�t.� _Je feet <br /> i. Compare the values of step G.1 and Step G.2.h. Select the <br /> greater of the two values as the downslope dike width; _ �^ <br /> Gi feet <br /> j. Total mound width is the sum of upslope dike RocC.sea wtih wio of wa :.. <br /> width plus rock layer width plus downslope V. <br /> Rock Bed Length * * '* <br /> dike width; <br /> / 0 ft + I Q ft + /Cr ft = > feet Up lopes ;dlt_* ' iDike th <br /> ;.v o wiati; <br /> k. Total mound e length is the sum of u slo <br /> g P P <br /> dike width <br /> P lus rock layer length plus <br /> Y g <br /> upslope slo e dike width; <br /> 1u ft + 6 S ft + /C ft= r) 5' feet -Total Length <br /> C? <br /> Downslope Upslope <br /> 3:1 4:1 S:1 6:1 7:1 3:1 4:1 5:1 6:1 7:1 8:1 <br /> %dope <br /> 0 3.0 4.0 5.0 6.0 7.0 3.0 4.0 5.0 6.0 7.0 8.0 <br /> 1 3.09 4.17 5.26 6.38 7S3 2.91 3.85 4.76 5.66 6S4 7.41 <br /> 2 3.19 4.35 556 6.82 8.14 2.83 3.70 4S4 5.36 6.14 6.90 <br /> 3 330 454 5.88 732 8.86 2.75 357 4.35 5.08 5.79 6.45 <br /> 4 3A1 4.76 6.25 7.89 9.72 2.68 3.45 4.17 4.84 5.46 6.06 <br /> 5 353 5.00 6.67 8.57 10.77 2.6133 4.00 4.62 5.19 571 <br /> 6 C 526,�. 7.14 9.38 12.07 254 3.23 3.85 4.41 4.93 SAI <br /> 7 _____3.66 3.80- - 5.56 7.69 1034 13.73 2.48 3.2 3.70 4.23 4.70 5.13 <br /> 8 3.95 5.88 8.33 1154 15.91 2.42 3.03 357 CAS 4.49 4.88 <br /> 9 4.11 6.25 9.09 13.04 18.92 2.36 2.94 3.45 3.90 4.30 4.65 <br /> 10 429 6.67 10.0 15.00 2333 2.31 2.86 3.33 3.75 4.12 4.44 <br /> 11 4.48 7.14 11.11 17.65 30A3 2.26 2.78 3.23 3.61 3.95 426 <br /> 12 4.69 7.69 1250 21A3 43.75 121 2.70 3.12 3.49 3.80 4.08 <br />