N3720 over Bois Darc Creek
GoodBryan County, Oklahoma · 1.0W .8N of Cobb · Structure no. 254830000000000
- Built
- 1998
- 27 years old
- Condition
- Good
- inspected May 2024
- Type
- Stringer/Multi-beam or Girder
- Prestressed Concrete
- Length
- 77 ft
- 1 main span
- Daily traffic
- 70
- 2022 count
- Owner
- County
- County Highway Agency
About this bridge
N3720 over Bois Darc Creek is a prestressed concrete stringer/multi-beam or girder carrying N3720 over Bois Darc Creek in Bryan County, Oklahoma. It was built in 1998, so it is 27 years old, younger than the Oklahoma average of 47.8 years.
The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 8 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.
It carries about 70 vehicles a day, roughly 10% of them trucks, projected to reach 112 by 2042. The structure is 77 ft (23.6 m) long and 29 ft wide. If it were closed, the detour would be 0.6 mi (1 km).
Location
Open in Google MapsCondition and inspection
All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.
| Component | Rating | Meaning |
|---|---|---|
| Deck | 8 Very Good | No problems noted. |
| Superstructure | 8 Very Good | No problems noted. |
| Substructure | 8 Very Good | No problems noted. |
| Channel and channel protection | 7 Good | Some minor problems. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was N3720 over Bois Darc Creek built?
It was built in 1998, making it 27 years old in 2025.
What condition is N3720 over Bois Darc Creek in?
The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in May 2024.
How much traffic does N3720 over Bois Darc Creek carry?
About 70 vehicles per day (2022 count), of which roughly 10% are trucks.
How long is N3720 over Bois Darc Creek?
The structure is 77 ft (23.6 m) long with a longest span of 75 ft (22.9 m) and a deck 29 ft wide.
Who owns N3720 over Bois Darc Creek?
It is owned by the County Highway Agency.