US 4 Nh 16 Tpk NB over Little Bay RD
GoodStrafford County, New Hampshire · Dover-Newington T.L. · Structure no. 006502010002500
- Built
- 1966
- 59 years old, rebuilt 2018
- Condition
- Good
- inspected July 2023
- Type
- Stringer/Multi-beam or Girder
- Steel Continuous
- Length
- 1,598 ft
- 9 main spans
- Daily traffic
- 34,298
- 2023 count
- Owner
- Toll Authority
- State Toll Authority
About this bridge
US 4 Nh 16 Tpk NB over Little Bay RD is a steel continuous stringer/multi-beam or girder carrying US 4 Nh 16 Tpk NB over Little Bay RD in Strafford County, New Hampshire. It was built in 1966 and reconstructed in 2018, so it is 59 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 34,298 vehicles a day, roughly 8% of them trucks, projected to reach 50,761 by 2043. The structure is 1,598 ft (487.1 m) long and 75 ft wide. If it were closed, the detour would be 18 mi (29 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 | 8 Very Good | No problems noted. |
| Superstructure | 8 Very Good | No problems noted. |
| 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 4 Nh 16 Tpk NB over Little Bay RD built?
It was built in 1966, making it 59 years old in 2025. It was reconstructed in 2018.
What condition is US 4 Nh 16 Tpk NB over Little Bay RD 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 July 2023.
How much traffic does US 4 Nh 16 Tpk NB over Little Bay RD carry?
About 34,298 vehicles per day (2023 count), of which roughly 8% are trucks.
How long is US 4 Nh 16 Tpk NB over Little Bay RD?
The structure is 1,598 ft (487.1 m) long with a longest span of 275 ft (83.8 m) and a deck 75 ft wide.
Who owns US 4 Nh 16 Tpk NB over Little Bay RD?
It is owned by the State Toll Authority.