TR 166 B over Drainage Ditch
FairLaSalle County, Illinois · E 10th RD N 590 · Structure no. 050353200000000
- Built
- 1991
- 34 years old
- Condition
- Fair
- inspected June 2024
- Type
- Box Beam or Girders - Multiple
- Prestressed Concrete
- Length
- 67 ft
- 2 main spans
- Daily traffic
- 25
- 2016 count
- Owner
- Town / Township
- Town or Township Highway Agency
About this bridge
TR 166 B over Drainage Ditch is a prestressed concrete box beam or girders - multiple carrying TR 166 B over Drainage Ditch in LaSalle County, Illinois. It was built in 1991, so it is 34 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 25 vehicles a day, roughly 4% of them trucks, projected to reach 25 by 2046. The structure is 67 ft (20.4 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 | 8 Very Good | No problems noted. |
| 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 166 B over Drainage Ditch built?
It was built in 1991, making it 34 years old in 2025.
What condition is TR 166 B over Drainage 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 June 2024.
How much traffic does TR 166 B over Drainage Ditch carry?
About 25 vehicles per day (2016 count), of which roughly 4% are trucks.
How long is TR 166 B over Drainage Ditch?
The structure is 67 ft (20.4 m) long with a longest span of 40 ft (12.1 m) and a deck 24 ft wide.
Who owns TR 166 B over Drainage Ditch?
It is owned by the Town or Township Highway Agency.