I-89 SB over Columbus Avenue
Good Condition59 years old9,810 vehicles/day
Location
| State | New Hampshire |
| County | Merrimack |
| Location | 2.9 Mi Sutton T.l |
| Carries | I-89 SB |
| Crosses | Columbus Avenue |
| Coordinates | 43.40923, -72.02606 |
Condition Ratings
| Overall Condition | Good |
| Deck | 7 (Good) |
| Superstructure | 7 (Good) |
| Substructure | 7 (Good) |
| Scour Critical | Not applicable |
Physical Characteristics
| Material | Steel |
| Design | Stringer/Multi-beam |
| Total Length | 68.9 ft (21 m) |
| Max Span | 65.0 ft (19.8 m) |
| Deck Width | 44.0 ft (13.4 m) |
| Deck Area | 281.4 sq m |
| Main Spans | 1 |
| Year Built | 1967 (reconstructed 1989) |
Traffic
| Avg Daily Traffic | 9,810 (2023) |
| Truck Traffic | 9% |
| Lanes On Bridge | 2 |
| Lanes Under Bridge | 2 |
Inspection & Ownership
| Last Inspection | 423 |
| Inspection Frequency | Every 24 months |
| Owner | State Highway Agency |
| Historical Significance | Bridge is not eligible for the National Register |
| Structure Number | 018800790008400 |