N4020 over Cotton Creek
FairWashington County, Oklahoma · 4E 2.8N of U.S. 75 · Structure no. 275520000000000
- Built
- 2007
- 18 years old
- Condition
- Fair
- inspected October 2024
- Type
- Stringer/Multi-beam or Girder
- Prestressed Concrete
- Length
- 108 ft
- 1 main span
- Daily traffic
- 100
- 2022 count
- Owner
- County
- County Highway Agency
About this bridge
N4020 over Cotton Creek is a prestressed concrete stringer/multi-beam or girder carrying N4020 over Cotton Creek in Washington County, Oklahoma. It was built in 2007, so it is 18 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 108 ft (32.8 m) long and 29 ft wide. If it were closed, the detour would be 7.5 mi (12 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 | 6 Satisfactory | Structural elements show some minor deterioration. |
| Substructure | 7 Good | Some minor problems. |
| Channel and channel protection | 6 Satisfactory | Structural elements show some minor deterioration. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was N4020 over Cotton Creek built?
It was built in 2007, making it 18 years old in 2025.
What condition is N4020 over Cotton 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 N4020 over Cotton Creek carry?
About 100 vehicles per day (2022 count), of which roughly 10% are trucks.
How long is N4020 over Cotton Creek?
The structure is 108 ft (32.8 m) long with a longest span of 105 ft (32 m) and a deck 29 ft wide.
Who owns N4020 over Cotton Creek?
It is owned by the County Highway Agency.