N3990 over Post Oak Creek
FairWashington County, Oklahoma · 2. E 7.7 N of US 60 · Structure no. 261440000000000
- Built
- 2002
- 23 years old
- Condition
- Fair
- inspected October 2024
- Type
- Culvert
- Concrete
- Length
- 39 ft
- 3 main spans
- Daily traffic
- 100
- 2022 count
- Owner
- County
- County Highway Agency
About this bridge
N3990 over Post Oak Creek is a concrete culvert carrying N3990 over Post Oak Creek in Washington County, Oklahoma. It was built in 2002, so it is 23 years old, younger than the Oklahoma average of 47.8 years.
The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 6 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 100 vehicles a day, roughly 10% of them trucks, projected to reach 160 by 2042. The structure is 39 ft (12 m) long and 30 ft wide. If it were closed, the detour would be 3.7 mi (6 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 |
|---|---|---|
| Channel and channel protection | 6 Satisfactory | Structural elements show some minor deterioration. |
| Culvert | 6 Satisfactory | Structural elements show some minor deterioration. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was N3990 over Post Oak Creek built?
It was built in 2002, making it 23 years old in 2025.
What condition is N3990 over Post Oak Creek 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 October 2024.
How much traffic does N3990 over Post Oak Creek carry?
About 100 vehicles per day (2022 count), of which roughly 10% are trucks.
How long is N3990 over Post Oak Creek?
The structure is 39 ft (12 m) long with a longest span of 12 ft (3.7 m) and a deck 30 ft wide.
Who owns N3990 over Post Oak Creek?
It is owned by the County Highway Agency.