The bottom of the distribution area must be constructed level. Therefore, the sand fill will be deeper on the downslope side of the distribution area.
Mound Sand Fill Downslope Depth = (Mound Sand Fill Upslope Depth) + (Site Slope)*(Distribution Width)
Mound Sand Fill Downslope Depth:
The site slope is 12% in this design example.
| Mound Sand Fill Downslope Depth | = (Mound Sand Fill Upslope Depth) + (Site Slope)*(Distribution Width) |
| = (22 inches) + (0.12)*(48 inches) | |
| = 28 inches |