US-421 over Red Bird River
FairClay County, Kentucky · 14.35 MI S. JCT Ky 80 · Structure no. 026B00104N
- Built
- 1986
- 39 years old
- Condition
- Fair
- inspected October 2021
- Type
- Stringer/Multi-beam or Girder
- Prestressed Concrete Continuous
- Length
- 251 ft
- 3 main spans
- Daily traffic
- 1,224
- 2022 count
- Owner
- State
- State Highway Agency
About this bridge
US-421 over Red Bird River is a prestressed concrete continuous stringer/multi-beam or girder carrying US-421 over Red Bird River in Clay County, Kentucky. It was built in 1986, so it is 39 years old, younger than the Kentucky average of 46.6 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 1,224 vehicles a day, roughly 5% of them trucks, projected to reach 1,224 by 2042. The structure is 251 ft (76.6 m) long and 31 ft wide. If it were closed, the detour would be 5 mi (8 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 | 7 Good | Some minor problems. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was US-421 over Red Bird River built?
It was built in 1986, making it 39 years old in 2025.
What condition is US-421 over Red Bird 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 October 2021.
How much traffic does US-421 over Red Bird River carry?
About 1,224 vehicles per day (2022 count), of which roughly 5% are trucks.
How long is US-421 over Red Bird River?
The structure is 251 ft (76.6 m) long with a longest span of 96 ft (29.4 m) and a deck 31 ft wide.
Who owns US-421 over Red Bird River?
It is owned by the State Highway Agency.