I-89 NB over US 4 Nh 10
GoodGrafton County, New Hampshire · 2.6 MI from Vt Sl · Structure no. 014400930010900
- Built
- 1966
- 59 years old
- Condition
- Good
- inspected November 2024
- Type
- Stringer/Multi-beam or Girder
- Steel
- Length
- 115 ft
- 1 main span
- Daily traffic
- 22,727
- 2023 count
- Owner
- State
- State Highway Agency
About this bridge
I-89 NB over US 4 Nh 10 is a steel stringer/multi-beam or girder carrying I-89 NB over US 4 Nh 10 in Grafton County, New Hampshire. It was built in 1966, 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 8 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.
It carries about 22,727 vehicles a day, roughly 9% of them trucks, projected to reach 33,635 by 2043. The structure is 115 ft (35.1 m) long and 61 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 | 9 Excellent | No problems noted. |
| Superstructure | 9 Excellent | No problems noted. |
| Substructure | 8 Very Good | No problems noted. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was I-89 NB over US 4 Nh 10 built?
It was built in 1966, making it 59 years old in 2025.
What condition is I-89 NB over US 4 Nh 10 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 November 2024.
How much traffic does I-89 NB over US 4 Nh 10 carry?
About 22,727 vehicles per day (2023 count), of which roughly 9% are trucks.
How long is I-89 NB over US 4 Nh 10?
The structure is 115 ft (35.1 m) long with a longest span of 108 ft (32.9 m) and a deck 61 ft wide.
Who owns I-89 NB over US 4 Nh 10?
It is owned by the State Highway Agency.