The mound will slope off at both ends. By adding on the end slope length, the overall length of the finished mound can be outlined on the site. Be sure that design specifications require that all trees are removed from this location. If soil is mounded around the base of a tree it will die.
End Slope Length = (Mound side slope factor) * (Average depth of sand fill under absorption area + Aggregate depth + Distribution protection depth + Mound cap depth)
End Slope Length:
The recommended mound side slope is 3:1 in this design example.
| End Slope Length | = (Mound side slope factor) * (Average depth of sand fill under absorption area + Aggregate depth + Distribution cover depth) |
| = 3*([22+28]/2 inches + 9 inches + 12 inches) | |
| = 138 inches | |
| = 11.5 ft |