N3120 over Salt Fork Arkansas River
FairKay County, Oklahoma · 5.5W 3.4S of I-35/US60 · Structure no. 192700000000000
- Built
- 1976
- 49 years old
- Condition
- Fair
- inspected January 2023
- Type
- Stringer/Multi-beam or Girder
- Prestressed Concrete
- Length
- 503 ft
- 5 main spans
- Daily traffic
- 88
- 2022 count
- Owner
- County
- County Highway Agency
About this bridge
N3120 over Salt Fork Arkansas River is a prestressed concrete stringer/multi-beam or girder carrying N3120 over Salt Fork Arkansas River in Kay County, Oklahoma. It was built in 1976, so it is 49 years old, older 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 88 vehicles a day, roughly 15% of them trucks, projected to reach 141 by 2042. The structure is 503 ft (153.2 m) long and 33 ft wide. If it were closed, the detour would be 11.2 mi (18 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 | 6 Satisfactory | Structural elements show some minor deterioration. |
| 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 N3120 over Salt Fork Arkansas River built?
It was built in 1976, making it 49 years old in 2025.
What condition is N3120 over Salt Fork Arkansas River 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 January 2023.
How much traffic does N3120 over Salt Fork Arkansas River carry?
About 88 vehicles per day (2022 count), of which roughly 15% are trucks.
How long is N3120 over Salt Fork Arkansas River?
The structure is 503 ft (153.2 m) long with a longest span of 100 ft (30.5 m) and a deck 33 ft wide.
Who owns N3120 over Salt Fork Arkansas River?
It is owned by the County Highway Agency.