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• <br /> - G. • DOWNSLOPE DIKE WIDTH <br /> 1. If landslope is 3% or more,subtract rock layer width from yc.�r1�. <br /> adsorption width to obtain minimum downslope dike toe V 11. , <br /> .2 o ft- /o ft = JO feet <br /> 2. Calculate Minimum mound size based on geometery: • r . <br /> a. Determine depth of clean sand fill at upslope edge of roc • <br /> . layer: Separation /•O feet <br /> f' b. Multiply rock layer width by landslope .� t root cover <br /> to determine drop in elevation; . • • • '1 of rto :ed <br /> Slope Difference separ3tior1 1 • feet <br /> dope Difference et <br /> /n x C., %+ 100 = d. 6 feet <br /> c. Add depth of clean sand for separation (2a) ups feet Width �w <br /> Rock Bed Width <br /> at upslope edge, depth of rock layer (1 foot) to depth of is feet DownSiope Width <br /> cover (1 foot) to find the mound height at the upslope edge f f feet <br /> of rock layer; • <br /> /,O ft + lft + lft= _ C1 feet <br /> d. Enter table with landslope and upslope dike ratio. <br /> . Select dike multiplier of •.1,073 . <br /> e. Multiply dike multiplier by upslope mound height ✓ <br /> to find upslope dike width:303 x -3` = IC) feet <br /> f. Add depth of dean sand for slope difference (2b) at ,. , <br /> • . downslope edge, to the mound height at the upslope edge t <br /> of rock layer (2c) to find the downslope height; '" <br /> • <br /> . 6i ?, ft +.3.6 ft =3,6, feet <br /> g. Enter table with landslope and downslope dike ratio. . . <br /> Select dike multiplier of 3..7 6 . . <br /> h. Multiply dike multiplier by downslope mound height • <br /> to get downslope dike width:3,Zrc x 3. G = /r feet <br /> i. Compare the values of step G.1 and Step G.2h Select the <br /> greater of the two values as the downslope dike width; "' , <br /> , <br /> lq feet <br /> ,t...ti6siooe widen:: <br />