US-421 over Martin Fk-Cumberland R
GoodHarlan County, Kentucky · 1.3 Mi. S Harlan City Lmt · Structure no. 048B00180N
- Built
- 2000
- 25 years old
- Condition
- Good
- inspected June 2023
- Type
- Stringer/Multi-beam or Girder
- Prestressed Concrete Continuous
- Length
- 204 ft
- 3 main spans
- Daily traffic
- 2,750
- 2022 count
- Owner
- State
- State Highway Agency
About this bridge
US-421 over Martin Fk-Cumberland R is a prestressed concrete continuous stringer/multi-beam or girder carrying US-421 over Martin Fk-Cumberland R in Harlan County, Kentucky. It was built in 2000, so it is 25 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 2,750 vehicles a day, roughly 11% of them trucks, projected to reach 2,750 by 2042. The structure is 204 ft (62.2 m) long and 47 ft wide. If it were closed, the detour would be 49.7 mi (80 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 Martin Fk-Cumberland R built?
It was built in 2000, making it 25 years old in 2025.
What condition is US-421 over Martin Fk-Cumberland R 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 June 2023.
How much traffic does US-421 over Martin Fk-Cumberland R carry?
About 2,750 vehicles per day (2022 count), of which roughly 11% are trucks.
How long is US-421 over Martin Fk-Cumberland R?
The structure is 204 ft (62.2 m) long with a longest span of 80 ft (24.4 m) and a deck 47 ft wide.
Who owns US-421 over Martin Fk-Cumberland R?
It is owned by the State Highway Agency.