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� ` • <br /> � <br /> 01/08/2003 Page 2 <br /> MOUND DIMENSIONS <br /> ' G. DETERMINE BERM WIDTH <br /> 1. Minimum Downslope Wdth =Adsorption Width - Rockbed Width <br /> 26.7 - 10 = 16.7 feet <br /> � 2. To calculate Minimum Mound Size: <br /> a. Determine depth of clean sand fill at upslope edge of rock layer: <br /> Separation 3 2.0 ft = 1_0 feet of sand below bed <br /> b. Add depth of clean sand for separation (2a) at upslope edge, depth of rock layer(1ft) <br /> to depth of cover(1 ft) to find the mound height at the upslope edge of rock layer: <br /> a 1.00 ft + 1ft + 1ft = 3.0 feet <br /> � 3. Percent Slope = 5 % <br /> 4. Select Upslope Berm Multiplier= 3.3 <br /> � 5. Multiply upslope berm multiplier by mound height to find upslope berm width: <br /> 3.33 x 3.0 feet = 10.0 feet upslope berm <br /> � 6. Add depth of sand for slope difference between upslope edge <br /> and downslope edge of rockbed to mound height: <br /> � 3.00 feet + 0.5 feet = 3.50 feet <br /> 7. Select Downslope Multiplier= 5 <br /> 8. Multiply downslope berm multiplier by mound height to find upslope berm width: <br /> " 3.50 feet x 5 = 18.0 feet downslope width <br /> 9. Compare the values of G1 8� G9, select the greater of the two values for downslbpe width. <br /> 16.7 feet or 18.0 feet = 18.0 feet <br /> � 10. Total mound width = upslope berm + rockbed width + downslope berm <br /> � 10 feet + 10 feet + 18.00 feet = 38 feet <br /> � 11. Total mound length is the sum of berm widths + rock layer length <br /> ; <br /> 10.0 feet + 63 feet + 10.0 feet = 83 feet lona <br /> � <br /> FINAL DIMENSIONS: 38 FEET x 83 FEET <br /> � <br /> � <br /> � <br /> � <br /> � <br />