I-89 SB over Columbus Avenue
GoodMerrimack County, New Hampshire · 2.9 MI Sutton T.L · Structure no. 018800790008400
- Built
- 1967
- 58 years old, rebuilt 1989
- Condition
- Good
- inspected April 2023
- Type
- Stringer/Multi-beam or Girder
- Steel
- Length
- 69 ft
- 1 main span
- Daily traffic
- 9,810
- 2023 count
- Owner
- State
- State Highway Agency
About this bridge
I-89 SB over Columbus Avenue is a steel stringer/multi-beam or girder carrying I-89 SB over Columbus Avenue in Merrimack County, New Hampshire. It was built in 1967 and reconstructed in 1989, so it is 58 years old, older than the New Hampshire average of 56.9 years.
The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.
It carries about 9,810 vehicles a day, roughly 9% of them trucks, projected to reach 14,518 by 2043. The structure is 69 ft (21 m) long and 44 ft wide. If it were closed, the detour would be 1.2 mi (2 km).
Location
Open in Google MapsCondition and inspection
All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.
| Component | Rating | Meaning |
|---|---|---|
| Deck | 7 Good | Some minor problems. |
| Superstructure | 7 Good | Some minor problems. |
| Substructure | 7 Good | Some minor problems. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was I-89 SB over Columbus Avenue built?
It was built in 1967, making it 58 years old in 2025. It was reconstructed in 1989.
What condition is I-89 SB over Columbus Avenue in?
The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in April 2023.
How much traffic does I-89 SB over Columbus Avenue carry?
About 9,810 vehicles per day (2023 count), of which roughly 9% are trucks.
How long is I-89 SB over Columbus Avenue?
The structure is 69 ft (21 m) long with a longest span of 65 ft (19.8 m) and a deck 44 ft wide.
Who owns I-89 SB over Columbus Avenue?
It is owned by the State Highway Agency.