E.3 Conduit Roughness Table (Conduit Roughness Tool)
The text files that are read or used in assigning conduit roughness by the Conduit Roughness Tool have the following data formats.
| Open | CONCRETE | 0.015 |
| Open | RIPRAP | 0.011 |
| Closed | C. ALUM | 0.014 |
| Closed | CMP | 0.012 |
| Closed | BRICK | 0.013 |
The first data column in the file shows the type of conduit cross section whether its open channel or closed structure.
The second data column in the file shows the conduit material.
The third data column in the file shows the user assigned roughness value for each conduit material.