Nh 31 over Contoocook River
FairHillsborough County, New Hampshire · 1.24 Mi. NE Hancock Tl · Structure no. 002100960008700
- Built
- 1934
- 91 years old
- Condition
- Fair
- inspected May 2024
- Type
- Frame
- Concrete
- Length
- 89 ft
- 1 main span
- Daily traffic
- 1,693
- 2023 count
- Owner
- State
- State Highway Agency
About this bridge
Nh 31 over Contoocook River is a concrete frame carrying Nh 31 over Contoocook River in Hillsborough County, New Hampshire. It was built in 1934, so it is 91 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 5 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 1,693 vehicles a day, roughly 4% of them trucks, projected to reach 2,505 by 2043. The structure is 89 ft (27.1 m) long and 34 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 5 or 6. Minor deterioration is present but the structure is sound.
| Component | Rating | Meaning |
|---|---|---|
| Deck | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
| Superstructure | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
| 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 31 over Contoocook River built?
It was built in 1934, making it 91 years old in 2025.
What condition is Nh 31 over Contoocook 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 May 2024.
How much traffic does Nh 31 over Contoocook River carry?
About 1,693 vehicles per day (2023 count), of which roughly 4% are trucks.
How long is Nh 31 over Contoocook River?
The structure is 89 ft (27.1 m) long with a longest span of 80 ft (24.4 m) and a deck 34 ft wide.
Who owns Nh 31 over Contoocook River?
It is owned by the State Highway Agency.