US302 Nh 10 Nh 18 over Ammonoosuc River
GoodGrafton County, New Hampshire · 3.9 MI Lisbon Tl · Structure no. 015302130005400
- Built
- 1950
- 75 years old, rebuilt 1987
- Condition
- Good
- inspected June 2024
- Type
- Stringer/Multi-beam or Girder
- Steel
- Length
- 155 ft
- 2 main spans
- Daily traffic
- 7,962
- 2023 count
- Owner
- State
- State Highway Agency
About this bridge
US302 Nh 10 Nh 18 over Ammonoosuc River is a steel stringer/multi-beam or girder carrying US302 Nh 10 Nh 18 over Ammonoosuc River in Grafton County, New Hampshire. It was built in 1950 and reconstructed in 1987, so it is 75 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 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 7,962 vehicles a day, roughly 4% of them trucks, projected to reach 11,783 by 2043. The structure is 155 ft (47.2 m) long and 55 ft wide. If it were closed, the detour would be 3.1 mi (5 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 | 7 Good | Some minor problems. |
| 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 US302 Nh 10 Nh 18 over Ammonoosuc River built?
It was built in 1950, making it 75 years old in 2025. It was reconstructed in 1987.
What condition is US302 Nh 10 Nh 18 over Ammonoosuc 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 June 2024.
How much traffic does US302 Nh 10 Nh 18 over Ammonoosuc River carry?
About 7,962 vehicles per day (2023 count), of which roughly 4% are trucks.
How long is US302 Nh 10 Nh 18 over Ammonoosuc River?
The structure is 155 ft (47.2 m) long with a longest span of 72 ft (21.9 m) and a deck 55 ft wide.
Who owns US302 Nh 10 Nh 18 over Ammonoosuc River?
It is owned by the State Highway Agency.