Nj 23 over Mill Brook
PoorSussex County, New Jersey · 0.36 MI N of CR 653 · Structure no. 1905161
- Built
- 1962
- 63 years old
- Condition
- Poor
- inspected March 2023
- Type
- Box Beam or Girders - Multiple
- Prestressed Concrete
- Length
- 53 ft
- 1 main span
- Daily traffic
- 6,227
- 2024 count
- Owner
- State
- State Highway Agency
About this bridge
Nj 23 over Mill Brook is a prestressed concrete box beam or girders - multiple carrying Nj 23 over Mill Brook in Sussex County, New Jersey. It was built in 1962, so it is 63 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 6,227 vehicles a day, roughly 7% of them trucks, projected to reach 7,472 by 2044. The structure is 53 ft (16.2 m) long and 66 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 | 6 Satisfactory | Structural elements show some minor deterioration. |
| Superstructure | 4 Poor | Advanced section loss, deterioration, spalling or scour. |
| 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 Nj 23 over Mill Brook built?
It was built in 1962, making it 63 years old in 2025.
What condition is Nj 23 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 23 over Mill Brook carry?
About 6,227 vehicles per day (2024 count), of which roughly 7% are trucks.
How long is Nj 23 over Mill Brook?
The structure is 53 ft (16.2 m) long with a longest span of 47 ft (14.3 m) and a deck 66 ft wide.
Who owns Nj 23 over Mill Brook?
It is owned by the State Highway Agency.