TR 21 over Flat Branch
GoodShelby County, Illinois · 3 MI SE of Moweaqua · Structure no. 087350100000000
- Built
- 1996
- 29 years old
- Condition
- Good
- inspected April 2023
- Type
- Box Beam or Girders - Multiple
- Prestressed Concrete
- Length
- 224 ft
- 3 main spans
- Daily traffic
- 150
- 2024 count
- Owner
- Town / Township
- Town or Township Highway Agency
About this bridge
TR 21 over Flat Branch is a prestressed concrete box beam or girders - multiple carrying TR 21 over Flat Branch in Shelby County, Illinois. It was built in 1996, so it is 29 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 150 vehicles a day, roughly 3% of them trucks, projected to reach 101 by 2046. The structure is 224 ft (68.4 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 | 8 Very Good | No problems noted. |
| Superstructure | 8 Very Good | No problems noted. |
| Substructure | 7 Good | Some minor problems. |
| Channel and channel protection | 6 Satisfactory | Structural elements show some minor deterioration. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was TR 21 over Flat Branch built?
It was built in 1996, making it 29 years old in 2025.
What condition is TR 21 over Flat Branch 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 April 2023.
How much traffic does TR 21 over Flat Branch carry?
About 150 vehicles per day (2024 count), of which roughly 3% are trucks.
How long is TR 21 over Flat Branch?
The structure is 224 ft (68.4 m) long with a longest span of 74 ft (22.6 m) and a deck 24 ft wide.
Who owns TR 21 over Flat Branch?
It is owned by the Town or Township Highway Agency.