US 421 over Blinn Ditch
FairClinton County, Indiana · 01.68 N SR 75 · Structure no. 032190
- Built
- 1988
- 37 years old, rebuilt 2016
- Condition
- Fair
- inspected February 2023
- Type
- Slab
- Concrete Continuous
- Length
- 71 ft
- 3 main spans
- Daily traffic
- 3,720
- 2016 count
- Owner
- State
- State Highway Agency
About this bridge
US 421 over Blinn Ditch is a concrete continuous slab carrying US 421 over Blinn Ditch in Clinton County, Indiana. It was built in 1988 and reconstructed in 2016, so it is 37 years old, younger 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 5 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 3,720 vehicles a day, roughly 11% of them trucks, projected to reach 3,890 by 2026. The structure is 71 ft (21.7 m) long and 47 ft wide. If it were closed, the detour would be 23 mi (37 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 | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
| Superstructure | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
| Substructure | 7 Good | Some minor problems. |
| Channel and channel protection | 8 Very Good | No problems noted. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was US 421 over Blinn Ditch built?
It was built in 1988, making it 37 years old in 2025. It was reconstructed in 2016.
What condition is US 421 over Blinn Ditch 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 Blinn Ditch carry?
About 3,720 vehicles per day (2016 count), of which roughly 11% are trucks.
How long is US 421 over Blinn Ditch?
The structure is 71 ft (21.7 m) long with a longest span of 28 ft (8.5 m) and a deck 47 ft wide.
Who owns US 421 over Blinn Ditch?
It is owned by the State Highway Agency.