I-78 over Beaver Brook
PoorHunterdon County, New Jersey · 1 MI East of Rt 31 · Structure no. 1017163
- Built
- 1941
- 84 years old, rebuilt 1968
- Condition
- Poor
- inspected March 2024
- Type
- Culvert
- Concrete
- Length
- 30 ft
- 1 main span
- Daily traffic
- 130,244
- 2024 count
- Owner
- State
- State Highway Agency
About this bridge
I-78 over Beaver Brook is a concrete culvert carrying I-78 over Beaver Brook in Hunterdon County, New Jersey. It was built in 1941 and reconstructed in 1968, so it is 84 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 130,244 vehicles a day, roughly 9% of them trucks, projected to reach 156,789 by 2044. The structure is 30 ft (9.1 m) long. If it were closed, the detour would be 1.2 mi (2 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 |
|---|---|---|
| Channel and channel protection | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
| Culvert | 4 Poor | Advanced section loss, deterioration, spalling or scour. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was I-78 over Beaver Brook built?
It was built in 1941, making it 84 years old in 2025. It was reconstructed in 1968.
What condition is I-78 over Beaver Brook 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 March 2024.
How much traffic does I-78 over Beaver Brook carry?
About 130,244 vehicles per day (2024 count), of which roughly 9% are trucks.
How long is I-78 over Beaver Brook?
The structure is 30 ft (9.1 m) long with a longest span of 30 ft (9.1 m).
Who owns I-78 over Beaver Brook?
It is owned by the State Highway Agency.