US 421 over Kankakee River
FairStarke County, Indiana · 02.87 N SR 10 · Structure no. 032450
- Built
- 1999
- 26 years old
- Condition
- Fair
- inspected August 2023
- Type
- Stringer/Multi-beam or Girder
- Prestressed Concrete Continuous
- Length
- 335 ft
- 4 main spans
- Daily traffic
- 5,115
- 2004 count
- Owner
- State
- State Highway Agency
About this bridge
US 421 over Kankakee River is a prestressed concrete continuous stringer/multi-beam or girder carrying US 421 over Kankakee River in Starke County, Indiana. It was built in 1999, so it is 26 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 5,115 vehicles a day, roughly 10% of them trucks, projected to reach 7,085 by 2030. The structure is 335 ft (102.1 m) long and 48 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 | 7 Good | Some minor problems. |
| 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 | 7 Good | Some minor problems. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was US 421 over Kankakee River built?
It was built in 1999, making it 26 years old in 2025.
What condition is US 421 over Kankakee 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 August 2023.
How much traffic does US 421 over Kankakee River carry?
About 5,115 vehicles per day (2004 count), of which roughly 10% are trucks.
How long is US 421 over Kankakee River?
The structure is 335 ft (102.1 m) long with a longest span of 83 ft (25.2 m) and a deck 48 ft wide.
Who owns US 421 over Kankakee River?
It is owned by the State Highway Agency.