TR 491 over Drainage Ditch
FairLaSalle County, Illinois · N 18th E 560 · Structure no. 050322900000000
- Built
- 1967
- 58 years old
- Condition
- Fair
- inspected April 2024
- Type
- Channel Beam
- Concrete
- Length
- 40 ft
- 1 main span
- Daily traffic
- 150
- 2016 count
- Owner
- Town / Township
- Town or Township Highway Agency
About this bridge
TR 491 over Drainage Ditch is a concrete channel beam carrying TR 491 over Drainage Ditch in LaSalle County, Illinois. It was built in 1967, so it is 58 years old, older 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 150 vehicles a day, roughly 40% of them trucks, projected to reach 152 by 2046. The structure is 40 ft (12.2 m) long and 26 ft wide.
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 | 7 Good | Some minor problems. |
| Superstructure | 7 Good | Some minor problems. |
| Substructure | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
| Channel and channel protection | 7 Good | Some minor problems. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was TR 491 over Drainage Ditch built?
It was built in 1967, making it 58 years old in 2025.
What condition is TR 491 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 April 2024.
How much traffic does TR 491 over Drainage Ditch carry?
About 150 vehicles per day (2016 count), of which roughly 40% are trucks.
How long is TR 491 over Drainage Ditch?
The structure is 40 ft (12.2 m) long with a longest span of 39 ft (11.9 m) and a deck 26 ft wide.
Who owns TR 491 over Drainage Ditch?
It is owned by the Town or Township Highway Agency.