Route Nj 21 over Third River
FairEssex County, New Jersey · 0.4 MI South of Rt 3 JCT · Structure no. 0717158
- Built
- 1961
- 64 years old
- Condition
- Fair
- inspected February 2023
- Type
- Stringer/Multi-beam or Girder
- Prestressed Concrete
- Length
- 129 ft
- 3 main spans
- Daily traffic
- 47,850
- 2023 count
- Owner
- State
- State Highway Agency
About this bridge
Route Nj 21 over Third River is a prestressed concrete stringer/multi-beam or girder carrying Route Nj 21 over Third River in Essex County, New Jersey. It was built in 1961, so it is 64 years old, older 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 5 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 47,850 vehicles a day, roughly 5% of them trucks, projected to reach 58,390 by 2043. The structure is 129 ft (39.3 m) long and 113 ft wide. If it were closed, the detour would be 1.9 mi (3 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 | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
| Superstructure | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
| Substructure | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
| Channel and channel protection | 8 Very Good | No problems noted. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was Route Nj 21 over Third River built?
It was built in 1961, making it 64 years old in 2025.
What condition is Route Nj 21 over Third 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 February 2023.
How much traffic does Route Nj 21 over Third River carry?
About 47,850 vehicles per day (2023 count), of which roughly 5% are trucks.
How long is Route Nj 21 over Third River?
The structure is 129 ft (39.3 m) long with a longest span of 51 ft (15.5 m) and a deck 113 ft wide.
Who owns Route Nj 21 over Third River?
It is owned by the State Highway Agency.