NH120 over I-89
GoodGrafton County, New Hampshire · .7MI from JCT RTE 4 · Structure no. 014401280012600
- Built
- 1966
- 59 years old, rebuilt 1999
- Condition
- Good
- inspected June 2023
- Type
- Stringer/Multi-beam or Girder
- Steel Continuous
- Length
- 210 ft
- 4 main spans
- Daily traffic
- 11,531
- 2023 count
- Owner
- State
- State Highway Agency
About this bridge
NH120 over I-89 is a steel continuous stringer/multi-beam or girder carrying NH120 over I-89 in Grafton County, New Hampshire. It was built in 1966 and reconstructed in 1999, so it is 59 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 11,531 vehicles a day, roughly 4% of them trucks, projected to reach 17,065 by 2043. The structure is 210 ft (63.9 m) long and 113 ft wide. If it were closed, the detour would be 8.1 mi (13 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 | 8 Very Good | No problems noted. |
| Substructure | 8 Very Good | No problems noted. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was NH120 over I-89 built?
It was built in 1966, making it 59 years old in 2025. It was reconstructed in 1999.
What condition is NH120 over I-89 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 June 2023.
How much traffic does NH120 over I-89 carry?
About 11,531 vehicles per day (2023 count), of which roughly 4% are trucks.
How long is NH120 over I-89?
The structure is 210 ft (63.9 m) long with a longest span of 61 ft (18.7 m) and a deck 113 ft wide.
Who owns NH120 over I-89?
It is owned by the State Highway Agency.