US 421 over Flat Creek
GoodFranklin County, Kentucky · 1.95 MI N of Ky 12 · Structure no. 037B00108N
- Built
- 2017
- 8 years old
- Condition
- Good
- inspected July 2024
- Type
- Box Beam or Girders - Multiple
- Prestressed Concrete
- Length
- 69 ft
- 1 main span
- Daily traffic
- 787
- 2019 count
- Owner
- State
- State Highway Agency
About this bridge
US 421 over Flat Creek is a prestressed concrete box beam or girders - multiple carrying US 421 over Flat Creek in Franklin County, Kentucky. It was built in 2017, so it is 8 years old, younger than the Kentucky average of 46.6 years.
The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.
It carries about 787 vehicles a day, roughly 12% of them trucks, projected to reach 787 by 2039. The structure is 69 ft (20.9 m) long and 32 ft wide. If it were closed, the detour would be 19.3 mi (31 km).
Location
Open in Google MapsCondition and inspection
All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.
| Component | Rating | Meaning |
|---|---|---|
| Deck | 7 Good | Some minor problems. |
| Superstructure | 8 Very Good | No problems noted. |
| 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 Flat Creek built?
It was built in 2017, making it 8 years old in 2025.
What condition is US 421 over Flat Creek in?
The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in July 2024.
How much traffic does US 421 over Flat Creek carry?
About 787 vehicles per day (2019 count), of which roughly 12% are trucks.
How long is US 421 over Flat Creek?
The structure is 69 ft (20.9 m) long with a longest span of 67 ft (20.4 m) and a deck 32 ft wide.
Who owns US 421 over Flat Creek?
It is owned by the State Highway Agency.