US 421 over Little Eagle Creek
FairBoone County, Indiana · 03.59 N I-465 · Structure no. 032130
- Built
- 1971
- 54 years old, rebuilt 2019
- Condition
- Fair
- inspected February 2023
- Type
- Stringer/Multi-beam or Girder
- Prestressed Concrete Continuous
- Length
- 195 ft
- 3 main spans
- Daily traffic
- 13,297
- 2018 count
- Owner
- State
- State Highway Agency
About this bridge
US 421 over Little Eagle Creek is a prestressed concrete continuous stringer/multi-beam or girder carrying US 421 over Little Eagle Creek in Boone County, Indiana. It was built in 1971 and reconstructed in 2019, so it is 54 years old, older than the Indiana 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 13,297 vehicles a day, roughly 9% of them trucks, projected to reach 15,288 by 2038. The structure is 195 ft (59.4 m) long and 47 ft wide. If it were closed, the detour would be 2.5 mi (4 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 | 7 Good | Some minor problems. |
| Superstructure | 7 Good | Some minor problems. |
| Substructure | 6 Satisfactory | Structural elements show some minor deterioration. |
| Channel and channel protection | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was US 421 over Little Eagle Creek built?
It was built in 1971, making it 54 years old in 2025. It was reconstructed in 2019.
What condition is US 421 over Little Eagle 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 February 2023.
How much traffic does US 421 over Little Eagle Creek carry?
About 13,297 vehicles per day (2018 count), of which roughly 9% are trucks.
How long is US 421 over Little Eagle Creek?
The structure is 195 ft (59.4 m) long with a longest span of 63 ft (19.3 m) and a deck 47 ft wide.
Who owns US 421 over Little Eagle Creek?
It is owned by the State Highway Agency.