(A) (1) Minimum pipe size is eight inches in diameter. A minimum pipe size of four inches with a minimum slope of 2% will be allowed for laterals only.
(2) Unless otherwise permitted by the Engineer, the slopes shown in the following table will be the minimum for sewer sizes shown:
Pipe Diameter | Minimum Slope (Feet per Foot) | Desirable Slope (Feet per Foot) |
8 inches | 0.0034 | 0.005 |
10 inches | 0.0025 | 0.004 |
12 inches | 0.0020 | 0.0032 |
15 inches | 0.0016 | 0.0024 |
(B) (Larger sewer sizes shall have a minimum slope as specified by the Engineer.)
(C) Sewer design will be based on District capacity model as to ultimate total volume of flow expected from the tributary area. All sewers shall be designed and constructed to give mean velocities, when flowing half full, of not less than 2.0 feet per second based on Manning’s formula using an “n” value of 0.013.
(Ord. 2019-02, passed 4-25-2019)