Wilton Road over Souhegan River
PoorHillsborough County, New Hampshire · 260FT RTE 31 · Structure no. 010400750011400
- Built
- 1938
- 87 years old, rebuilt 1986
- Condition
- Poor
- inspected November 2024
- Type
- Truss - Thru
- Steel
- Length
- 173 ft
- 1 main span
- Daily traffic
- 1,866
- 2023 count
- Owner
- City
- City or Municipal Highway Agency
About this bridge
Wilton Road over Souhegan River is a steel truss - thru carrying Wilton Road over Souhegan River in Hillsborough County, New Hampshire. It was built in 1938 and reconstructed in 1986, so it is 87 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 poor condition with a lowest component rating of 4 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.
It carries about 1,866 vehicles a day, roughly 4% of them trucks, projected to reach 2,761 by 2043. The structure is 173 ft (52.7 m) long and 32 ft wide. If it were closed, the detour would be 1.9 mi (3 km).
Location
Open in Google MapsCondition and inspection
The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.
| Component | Rating | Meaning |
|---|---|---|
| Deck | 6 Satisfactory | Structural elements show some minor deterioration. |
| Superstructure | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
| Substructure | 4 Poor | Advanced section loss, deterioration, spalling or scour. |
| Channel and channel protection | 6 Satisfactory | Structural elements show some minor deterioration. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was Wilton Road over Souhegan River built?
It was built in 1938, making it 87 years old in 2025. It was reconstructed in 1986.
What condition is Wilton Road over Souhegan River in?
The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in November 2024.
How much traffic does Wilton Road over Souhegan River carry?
About 1,866 vehicles per day (2023 count), of which roughly 4% are trucks.
How long is Wilton Road over Souhegan River?
The structure is 173 ft (52.7 m) long with a longest span of 168 ft (51.2 m) and a deck 32 ft wide.
Who owns Wilton Road over Souhegan River?
It is owned by the City or Municipal Highway Agency.