County Route 645 over Little Flat Brook
FairSussex County, New Jersey · 0.2 MI NW of US 206 · Structure no. 1900P21
- Built
- 1936
- 89 years old, rebuilt 1981
- Condition
- Fair
- inspected March 2023
- Type
- Stringer/Multi-beam or Girder
- Steel
- Length
- 35 ft
- 1 main span
- Daily traffic
- 586
- 2023 count
- Owner
- County
- County Highway Agency
About this bridge
County Route 645 over Little Flat Brook is a steel stringer/multi-beam or girder carrying County Route 645 over Little Flat Brook in Sussex County, New Jersey. It was built in 1936 and reconstructed in 1981, so it is 89 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 586 vehicles a day, roughly 5% of them trucks, projected to reach 693 by 2043. The structure is 35 ft (10.7 m) long and 25 ft wide. 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 5 or 6. Minor deterioration is present but the structure is sound.
| Component | Rating | Meaning |
|---|---|---|
| Deck | 6 Satisfactory | Structural elements show some minor deterioration. |
| 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 | 7 Good | Some minor problems. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was County Route 645 over Little Flat Brook built?
It was built in 1936, making it 89 years old in 2025. It was reconstructed in 1981.
What condition is County Route 645 over Little Flat Brook 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 March 2023.
How much traffic does County Route 645 over Little Flat Brook carry?
About 586 vehicles per day (2023 count), of which roughly 5% are trucks.
How long is County Route 645 over Little Flat Brook?
The structure is 35 ft (10.7 m) long with a longest span of 31 ft (9.4 m) and a deck 25 ft wide.
Who owns County Route 645 over Little Flat Brook?
It is owned by the County Highway Agency.