US 46 over Black River
FairMorris County, New Jersey · 0.36 MI W of CR 642 · Structure no. 1409151
- Built
- 1978
- 47 years old
- Condition
- Fair
- inspected March 2023
- Type
- Slab
- Prestressed Concrete
- Length
- 45 ft
- 1 main span
- Daily traffic
- 16,609
- 2023 count
- Owner
- State
- State Highway Agency
About this bridge
US 46 over Black River is a prestressed concrete slab carrying US 46 over Black River in Morris County, New Jersey. It was built in 1978, so it is 47 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 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 16,609 vehicles a day, roughly 4% of them trucks, projected to reach 19,930 by 2043. The structure is 45 ft (13.7 m) long and 58 ft wide. If it were closed, the detour would be 3.1 mi (5 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 | 6 Satisfactory | Structural elements show some minor deterioration. |
| Superstructure | 6 Satisfactory | Structural elements show some minor deterioration. |
| Substructure | 6 Satisfactory | Structural elements show some minor deterioration. |
| Channel and channel protection | 7 Good | Some minor problems. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was US 46 over Black River built?
It was built in 1978, making it 47 years old in 2025.
What condition is US 46 over Black 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 March 2023.
How much traffic does US 46 over Black River carry?
About 16,609 vehicles per day (2023 count), of which roughly 4% are trucks.
How long is US 46 over Black River?
The structure is 45 ft (13.7 m) long with a longest span of 41 ft (12.5 m) and a deck 58 ft wide.
Who owns US 46 over Black River?
It is owned by the State Highway Agency.