TR 421 over Mitchell Creek
GoodShelby County, Illinois · 1.8 MI W of Cowden · Structure no. 087349400000000
- Built
- 1999
- 26 years old
- Condition
- Good
- inspected March 2023
- Type
- Box Beam or Girders - Multiple
- Prestressed Concrete
- Length
- 113 ft
- 3 main spans
- Daily traffic
- 375
- 2024 count
- Owner
- Town / Township
- Town or Township Highway Agency
About this bridge
TR 421 over Mitchell Creek is a prestressed concrete box beam or girders - multiple carrying TR 421 over Mitchell Creek in Shelby County, Illinois. It was built in 1999, so it is 26 years old, younger than the Illinois average of 45.3 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 375 vehicles a day, roughly 4% of them trucks, projected to reach 278 by 2046. The structure is 113 ft (34.4 m) long and 24 ft wide. If it were closed, the detour would be 3.7 mi (6 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 | 7 Good | Some minor problems. |
| Substructure | 8 Very Good | No problems noted. |
| Channel and channel protection | 8 Very Good | No problems noted. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was TR 421 over Mitchell Creek built?
It was built in 1999, making it 26 years old in 2025.
What condition is TR 421 over Mitchell 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 March 2023.
How much traffic does TR 421 over Mitchell Creek carry?
About 375 vehicles per day (2024 count), of which roughly 4% are trucks.
How long is TR 421 over Mitchell Creek?
The structure is 113 ft (34.4 m) long with a longest span of 37 ft (11.3 m) and a deck 24 ft wide.
Who owns TR 421 over Mitchell Creek?
It is owned by the Town or Township Highway Agency.