US 4 over NH108
GoodStrafford County, New Hampshire · .7 MI from Madbury T.L. · Structure no. 007001200012200
- Built
- 1966
- 59 years old
- Condition
- Good
- inspected June 2024
- Type
- Stringer/Multi-beam or Girder
- Steel Continuous
- Length
- 157 ft
- 3 main spans
- Daily traffic
- 10,545
- 2023 count
- Owner
- State
- State Highway Agency
About this bridge
US 4 over NH108 is a steel continuous stringer/multi-beam or girder carrying US 4 over NH108 in Strafford 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 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 10,545 vehicles a day, roughly 5% of them trucks, projected to reach 15,606 by 2043. The structure is 157 ft (47.9 m) long and 51 ft wide.
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 US 4 over NH108 built?
It was built in 1966, making it 59 years old in 2025.
What condition is US 4 over NH108 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 2024.
How much traffic does US 4 over NH108 carry?
About 10,545 vehicles per day (2023 count), of which roughly 5% are trucks.
How long is US 4 over NH108?
The structure is 157 ft (47.9 m) long with a longest span of 65 ft (19.8 m) and a deck 51 ft wide.
Who owns US 4 over NH108?
It is owned by the State Highway Agency.