N4320 over Thompson Creek
FairCraig County, Oklahoma · 3.4 MI N of SH 600 · Structure no. 233450000000000
- Built
- 1991
- 34 years old
- Condition
- Fair
- inspected August 2024
- Type
- Tee Beam
- Prestressed Concrete
- Length
- 121 ft
- 3 main spans
- Daily traffic
- 100
- 2022 count
- Owner
- County
- County Highway Agency
About this bridge
N4320 over Thompson Creek is a prestressed concrete tee beam carrying N4320 over Thompson Creek in Craig County, Oklahoma. It was built in 1991, so it is 34 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 121 ft (36.9 m) long and 28 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 |
|---|---|---|
| Deck | 6 Satisfactory | Structural elements show some minor deterioration. |
| Superstructure | 7 Good | Some minor problems. |
| Substructure | 7 Good | Some minor problems. |
| Channel and channel protection | 8 Very Good | No problems noted. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was N4320 over Thompson Creek built?
It was built in 1991, making it 34 years old in 2025.
What condition is N4320 over Thompson 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 August 2024.
How much traffic does N4320 over Thompson Creek carry?
About 100 vehicles per day (2022 count), of which roughly 10% are trucks.
How long is N4320 over Thompson Creek?
The structure is 121 ft (36.9 m) long with a longest span of 40 ft (12.2 m) and a deck 28 ft wide.
Who owns N4320 over Thompson Creek?
It is owned by the County Highway Agency.