TR 129 over Duff Armstrong Ditch
FairMason County, Illinois · 2 MI Ssw Easton · Structure no. 063410500000000
- Built
- 1988
- 37 years old
- Condition
- Fair
- inspected February 2025
- Type
- Box Beam or Girders - Multiple
- Prestressed Concrete
- Length
- 32 ft
- 1 main span
- Daily traffic
- 75
- 2024 count
- Owner
- Town / Township
- Town or Township Highway Agency
About this bridge
TR 129 over Duff Armstrong Ditch is a prestressed concrete box beam or girders - multiple carrying TR 129 over Duff Armstrong Ditch in Mason County, Illinois. It was built in 1988, so it is 37 years old, younger than the Illinois average of 45.3 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 75 vehicles a day, roughly 13% of them trucks, projected to reach 76 by 2046. The structure is 32 ft (9.8 m) long and 24 ft wide. If it were closed, the detour would be 3.1 mi (5 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 | 6 Satisfactory | Structural elements show some minor deterioration. |
| Superstructure | 6 Satisfactory | Structural elements show some minor deterioration. |
| Substructure | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
| Channel and channel protection | 4 Poor | Advanced section loss, deterioration, spalling or scour. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was TR 129 over Duff Armstrong Ditch built?
It was built in 1988, making it 37 years old in 2025.
What condition is TR 129 over Duff Armstrong 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 2025.
How much traffic does TR 129 over Duff Armstrong Ditch carry?
About 75 vehicles per day (2024 count), of which roughly 13% are trucks.
How long is TR 129 over Duff Armstrong Ditch?
The structure is 32 ft (9.8 m) long with a longest span of 30 ft (9 m) and a deck 24 ft wide.
Who owns TR 129 over Duff Armstrong Ditch?
It is owned by the Town or Township Highway Agency.