Nj 57 over Mill Brook
PoorWarren County, New Jersey · 4.6 MI W of Rt 31 JCT · Structure no. 2105159
- Built
- 1922
- 103 years old
- Condition
- Poor
- inspected March 2023
- Type
- Stringer/Multi-beam or Girder
- Steel
- Length
- 36 ft
- 1 main span
- Daily traffic
- 11,809
- 2023 count
- Owner
- State
- State Highway Agency
About this bridge
Nj 57 over Mill Brook is a steel stringer/multi-beam or girder carrying Nj 57 over Mill Brook in Warren County, New Jersey. It was built in 1922, so it is 103 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 11,809 vehicles a day, roughly 7% of them trucks, projected to reach 14,503 by 2043. The structure is 36 ft (11 m) long and 33 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 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 | 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 | 4 Poor | Advanced section loss, deterioration, spalling or scour. |
| Channel and channel protection | 6 Satisfactory | Structural elements show some minor deterioration. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was Nj 57 over Mill Brook built?
It was built in 1922, making it 103 years old in 2025.
What condition is Nj 57 over Mill 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 2023.
How much traffic does Nj 57 over Mill Brook carry?
About 11,809 vehicles per day (2023 count), of which roughly 7% are trucks.
How long is Nj 57 over Mill Brook?
The structure is 36 ft (11 m) long with a longest span of 31 ft (9.4 m) and a deck 33 ft wide.
Who owns Nj 57 over Mill Brook?
It is owned by the State Highway Agency.