TR 321 over Miller CR
GoodMontgomery County, Illinois · 4 MI SW Hillsbro · Structure no. 068334600000000
- Built
- 2001
- 24 years old
- Condition
- Good
- inspected January 2025
- Type
- Box Beam or Girders - Multiple
- Prestressed Concrete
- Length
- 70 ft
- 1 main span
- Daily traffic
- 50
- 2020 count
- Owner
- Town / Township
- Town or Township Highway Agency
About this bridge
TR 321 over Miller CR is a prestressed concrete box beam or girders - multiple carrying TR 321 over Miller CR in Montgomery County, Illinois. It was built in 2001, so it is 24 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 50 vehicles a day, projected to reach 51 by 2046. The structure is 70 ft (21.2 m) long and 27 ft wide. If it were closed, the detour would be 3.1 mi (5 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 | 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 TR 321 over Miller CR built?
It was built in 2001, making it 24 years old in 2025.
What condition is TR 321 over Miller CR 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 January 2025.
How much traffic does TR 321 over Miller CR carry?
About 50 vehicles per day (2020 count).
How long is TR 321 over Miller CR?
The structure is 70 ft (21.2 m) long with a longest span of 67 ft (20.4 m) and a deck 27 ft wide.
Who owns TR 321 over Miller CR?
It is owned by the Town or Township Highway Agency.