Oak Tree RD CR 604 over Lehigh Valley Line
PoorMiddlesex County, New Jersey · 2.9MI N of I287&NJ27 JCT · Structure no. 1253164
- Built
- 1931
- 94 years old
- Condition
- Poor
- inspected September 2023
- Type
- Girder and Floorbeam System
- Steel
- Length
- 168 ft
- 1 main span
- Daily traffic
- 18,708
- 2023 count
- Owner
- Unknown
- Unknown
About this bridge
Oak Tree RD CR 604 over Lehigh Valley Line is a steel girder and floorbeam system carrying Oak Tree RD CR 604 over Lehigh Valley Line in Middlesex County, New Jersey. It was built in 1931, so it is 94 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 poor condition with a lowest component rating of 4 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.
It carries about 18,708 vehicles a day, roughly 4% of them trucks, projected to reach 22,827 by 2043. The structure is 168 ft (51.2 m) long and 32 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 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.
| Component | Rating | Meaning |
|---|---|---|
| Deck | 4 Poor | Advanced section loss, deterioration, spalling or scour. |
| Superstructure | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
| Substructure | 6 Satisfactory | Structural elements show some minor deterioration. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was Oak Tree RD CR 604 over Lehigh Valley Line built?
It was built in 1931, making it 94 years old in 2025.
What condition is Oak Tree RD CR 604 over Lehigh Valley Line in?
The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in September 2023.
How much traffic does Oak Tree RD CR 604 over Lehigh Valley Line carry?
About 18,708 vehicles per day (2023 count), of which roughly 4% are trucks.
How long is Oak Tree RD CR 604 over Lehigh Valley Line?
The structure is 168 ft (51.2 m) long with a longest span of 94 ft (28.7 m) and a deck 32 ft wide.
Who owns Oak Tree RD CR 604 over Lehigh Valley Line?
It is owned by the Unknown and maintained by the State Highway Agency.