TR-40 over The Slough
FairLawrence County, Illinois · 2 MI Ese Chauncey · Structure no. 051324300000000
- Built
- 1984
- 41 years old
- Condition
- Fair
- inspected January 2024
- Type
- Box Beam or Girders - Multiple
- Prestressed Concrete
- Length
- 72 ft
- 2 main spans
- Daily traffic
- 50
- 2021 count
- Owner
- Town / Township
- Town or Township Highway Agency
About this bridge
TR-40 over The Slough is a prestressed concrete box beam or girders - multiple carrying TR-40 over The Slough in Lawrence County, Illinois. It was built in 1984, so it is 41 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 6 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 50 vehicles a day, roughly 4% of them trucks, projected to reach 51 by 2046. The structure is 72 ft (21.9 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 | 6 Satisfactory | Structural elements show some minor deterioration. |
| Channel and channel protection | 7 Good | Some minor problems. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was TR-40 over The Slough built?
It was built in 1984, making it 41 years old in 2025.
What condition is TR-40 over The Slough 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 January 2024.
How much traffic does TR-40 over The Slough carry?
About 50 vehicles per day (2021 count), of which roughly 4% are trucks.
How long is TR-40 over The Slough?
The structure is 72 ft (21.9 m) long with a longest span of 34 ft (10.4 m) and a deck 24 ft wide.
Who owns TR-40 over The Slough?
It is owned by the Town or Township Highway Agency.