Nh 4 over Salmon Falls River
GoodStrafford County, New Hampshire · At Maine State Line · Structure no. 022301160008600
- Built
- 1970
- 55 years old, rebuilt 2011
- Condition
- Good
- inspected August 2024
- Type
- Stringer/Multi-beam or Girder
- Steel Continuous
- Length
- 164 ft
- 2 main spans
- Daily traffic
- 10,507
- 2023 count
- Owner
- State
- State Highway Agency
About this bridge
Nh 4 over Salmon Falls River is a steel continuous stringer/multi-beam or girder carrying Nh 4 over Salmon Falls River in Strafford County, New Hampshire. It was built in 1970 and reconstructed in 2011, so it is 55 years old, younger 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 10,507 vehicles a day, roughly 5% of them trucks, projected to reach 15,550 by 2043. The structure is 164 ft (50 m) long and 52 ft wide. If it were closed, the detour would be 3.7 mi (6 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 | 8 Very Good | No problems noted. |
| Superstructure | 7 Good | Some minor problems. |
| Substructure | 7 Good | Some minor problems. |
| Channel and channel protection | 7 Good | Some minor problems. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was Nh 4 over Salmon Falls River built?
It was built in 1970, making it 55 years old in 2025. It was reconstructed in 2011.
What condition is Nh 4 over Salmon Falls River 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 August 2024.
How much traffic does Nh 4 over Salmon Falls River carry?
About 10,507 vehicles per day (2023 count), of which roughly 5% are trucks.
How long is Nh 4 over Salmon Falls River?
The structure is 164 ft (50 m) long with a longest span of 80 ft (24.4 m) and a deck 52 ft wide.
Who owns Nh 4 over Salmon Falls River?
It is owned by the State Highway Agency.