| Diameter (in) | Repair Cost ($) | Replacement Cost ($/ft) | Paralleling Cost ($/ft) |
| 6 | 281 | 93 | 84 |
| 8 | 412 | 97 | 94 |
| 10 | 589 | 106 | 101 |
| 12 | 775 | 116 | 118 |