Nj 31 over S Branch Raritan River
GoodHunterdon County, New Jersey · 1.23 MI N of I-78 JCT · Structure no. 1013151
- Built
- 1996
- 29 years old
- Condition
- Good
- inspected July 2024
- Type
- Stringer/Multi-beam or Girder
- Prestressed Concrete
- Length
- 255 ft
- 2 main spans
- Daily traffic
- 31,802
- 2024 count
- Owner
- State
- State Highway Agency
About this bridge
Nj 31 over S Branch Raritan River is a prestressed concrete stringer/multi-beam or girder carrying Nj 31 over S Branch Raritan River in Hunterdon County, New Jersey. It was built in 1996, so it is 29 years old, younger than the New Jersey average of 58.5 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 31,802 vehicles a day, roughly 4% of them trucks, projected to reach 38,804 by 2044. The structure is 255 ft (77.7 m) long and 102 ft wide. If it were closed, the detour would be 1.9 mi (3 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 | 8 Very Good | No problems noted. |
| Substructure | 7 Good | Some minor problems. |
| Channel and channel protection | 8 Very Good | No problems noted. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was Nj 31 over S Branch Raritan River built?
It was built in 1996, making it 29 years old in 2025.
What condition is Nj 31 over S Branch Raritan 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 July 2024.
How much traffic does Nj 31 over S Branch Raritan River carry?
About 31,802 vehicles per day (2024 count), of which roughly 4% are trucks.
How long is Nj 31 over S Branch Raritan River?
The structure is 255 ft (77.7 m) long with a longest span of 125 ft (38.1 m) and a deck 102 ft wide.
Who owns Nj 31 over S Branch Raritan River?
It is owned by the State Highway Agency.