Nh 31 over Souhegan River
FairHillsborough County, New Hampshire · .3 MI from Greenville Tl · Structure no. 027700770005200
- Built
- 1951
- 74 years old
- Condition
- Fair
- inspected April 2024
- Type
- Culvert
- Concrete
- Length
- 59 ft
- 1 main span
- Daily traffic
- 4,552
- 2023 count
- Owner
- State
- State Highway Agency
About this bridge
Nh 31 over Souhegan River is a concrete culvert carrying Nh 31 over Souhegan River in Hillsborough County, New Hampshire. It was built in 1951, so it is 74 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 fair condition with a lowest component rating of 6 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.
It carries about 4,552 vehicles a day, roughly 4% of them trucks, projected to reach 6,736 by 2043. The structure is 59 ft (18 m) long and 41 ft wide. If it were closed, the detour would be 8.1 mi (13 km).
Location
Open in Google MapsCondition and inspection
The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.
| Component | Rating | Meaning |
|---|---|---|
| Channel and channel protection | 6 Satisfactory | Structural elements show some minor deterioration. |
| Culvert | 6 Satisfactory | Structural elements show some minor deterioration. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was Nh 31 over Souhegan River built?
It was built in 1951, making it 74 years old in 2025.
What condition is Nh 31 over Souhegan River in?
The National Bridge Inventory rates it in fair condition. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. The last reported inspection was in April 2024.
How much traffic does Nh 31 over Souhegan River carry?
About 4,552 vehicles per day (2023 count), of which roughly 4% are trucks.
How long is Nh 31 over Souhegan River?
The structure is 59 ft (18 m) long with a longest span of 56 ft (17.1 m) and a deck 41 ft wide.
Who owns Nh 31 over Souhegan River?
It is owned by the State Highway Agency.