Prospect Street over Ammonoosuc River
FairGrafton County, New Hampshire · 6.6 MI from Littleton Tl · Structure no. 002400710013700
- Built
- 1928
- 97 years old, rebuilt 2011
- Condition
- Fair
- inspected August 2023
- Type
- Truss - Thru
- Steel
- Length
- 111 ft
- 1 main span
- Daily traffic
- 178
- 2023 count
- Owner
- City
- City or Municipal Highway Agency
About this bridge
Prospect Street over Ammonoosuc River is a steel truss - thru carrying Prospect Street over Ammonoosuc River in Grafton County, New Hampshire. It was built in 1928 and reconstructed in 2011, so it is 97 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 178 vehicles a day, roughly 4% of them trucks, projected to reach 263 by 2043. The structure is 111 ft (33.8 m) long and 18 ft wide. If it were closed, the detour would be 6.8 mi (11 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 | 7 Good | Some minor problems. |
| Superstructure | 7 Good | Some minor problems. |
| Substructure | 6 Satisfactory | Structural elements show some minor deterioration. |
| Channel and channel protection | 8 Very Good | No problems noted. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was Prospect Street over Ammonoosuc River built?
It was built in 1928, making it 97 years old in 2025. It was reconstructed in 2011.
What condition is Prospect Street over Ammonoosuc 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 August 2023.
How much traffic does Prospect Street over Ammonoosuc River carry?
About 178 vehicles per day (2023 count), of which roughly 4% are trucks.
How long is Prospect Street over Ammonoosuc River?
The structure is 111 ft (33.8 m) long with a longest span of 102 ft (31.1 m) and a deck 18 ft wide.
Who owns Prospect Street over Ammonoosuc River?
It is owned by the City or Municipal Highway Agency.