The mound width for a bed system shall be determined by the following equation:
W = J + A + I (Equation 9-6)
For SI: 1 foot = 304.8 mm.
The mound width for a trench system shall be determined by the following equation:
For SI: 1 foot = 304.8 mm.
where:
J = 3(D + F + G)SU
I = 3(E + F + G)SD
The upslope correction factor (SU) and the downslope correction factor (SD) shall be determined based on the slope in accordance with Table 903.5.5.
TABLE 903.5.5
DOWNSLOPE AND UPSLOPE WIDTH CORRECTIONS
FOR MOUNDS ON SLOPING SITES
| SLOPE | DOWNSLOPE CORRECTION FACTOR (SD) | UPSLOPE CORRECTION FACTOR (SU) |
| 0 | 1 | 1 |
| 1 | 1.03 | 0.97 |
| 2 | 1.06 | 0.94 |
| 3 | 1.10 | 0.915 |
| 4 | 1.14 | 0.89 |
| 5 | 1.18 | 0.875 |
| 6 | 1.22 | 0.86 |
| 7 | 1.27 | 0.83 |
| 8 | 1.32 | 0.80 |
| 9 | 1.38 | 0.785 |
| 10 | 1.44 | 0.77 |
| 11 | 1.51 | 0.75 |
| 12 | 1.57 | 0.73 |