Basal Width = (Linear Loading Rate)/(Basal Loading Rate)
The basal width should be outlined on the site and protected from construction traffic and equipment. (Note: The basal width is normally less than the mound side widths, which are required to provide a mound side slope no steeper than 3:1.)
Basal Width:
| Basal Width | = (Linear Loading Rate)/(Basal Loading Rate) |
| = (4 gpd/lf) /(0.6 gpd/ft2) | |
| = 6.7 ft |
The basal width is 6.7 - 4 = 2.7 feet wider than the distribution area width.