US 3 Nh 11 over Winnisquam Lake
GoodBelknap County, New Hampshire · Sanbornton-Belmont Tl · Structure no. 023102310007300
- Built
- 1973
- 52 years old, rebuilt 2006
- Condition
- Good
- inspected August 2024
- Type
- Stringer/Multi-beam or Girder
- Steel Continuous
- Length
- 474 ft
- 4 main spans
- Daily traffic
- 16,322
- 2023 count
- Owner
- State
- State Highway Agency
About this bridge
US 3 Nh 11 over Winnisquam Lake is a steel continuous stringer/multi-beam or girder carrying US 3 Nh 11 over Winnisquam Lake in Belknap County, New Hampshire. It was built in 1973 and reconstructed in 2006, so it is 52 years old, younger 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 16,322 vehicles a day, roughly 4% of them trucks, projected to reach 24,156 by 2043. The structure is 474 ft (144.5 m) long and 53 ft wide. If it were closed, the detour would be 6.8 mi (11 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 US 3 Nh 11 over Winnisquam Lake built?
It was built in 1973, making it 52 years old in 2025. It was reconstructed in 2006.
What condition is US 3 Nh 11 over Winnisquam Lake 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 August 2024.
How much traffic does US 3 Nh 11 over Winnisquam Lake carry?
About 16,322 vehicles per day (2023 count), of which roughly 4% are trucks.
How long is US 3 Nh 11 over Winnisquam Lake?
The structure is 474 ft (144.5 m) long with a longest span of 130 ft (39.6 m) and a deck 53 ft wide.
Who owns US 3 Nh 11 over Winnisquam Lake?
It is owned by the State Highway Agency.