I-89 SB over Nh 13
GoodMerrimack County, New Hampshire · 1.4 MI NW of Bow Tl · Structure no. 005201810005500
- Built
- 1959
- 66 years old, rebuilt 1993
- Condition
- Good
- inspected July 2024
- Type
- Stringer/Multi-beam or Girder
- Steel Continuous
- Length
- 147 ft
- 3 main spans
- Daily traffic
- 22,511
- 2023 count
- Owner
- State
- State Highway Agency
About this bridge
I-89 SB over Nh 13 is a steel continuous stringer/multi-beam or girder carrying I-89 SB over Nh 13 in Merrimack County, New Hampshire. It was built in 1959 and reconstructed in 1993, so it is 66 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 22,511 vehicles a day, roughly 6% of them trucks, projected to reach 33,316 by 2043. The structure is 147 ft (44.8 m) long and 62 ft wide. If it were closed, the detour would be 11.2 mi (18 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 Nh 13 built?
It was built in 1959, making it 66 years old in 2025. It was reconstructed in 1993.
What condition is I-89 SB over Nh 13 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 July 2024.
How much traffic does I-89 SB over Nh 13 carry?
About 22,511 vehicles per day (2023 count), of which roughly 6% are trucks.
How long is I-89 SB over Nh 13?
The structure is 147 ft (44.8 m) long with a longest span of 54 ft (16.5 m) and a deck 62 ft wide.
Who owns I-89 SB over Nh 13?
It is owned by the State Highway Agency.