Il 171 SB First Av over RR - Cn
FairCook County, Illinois · 0.3 M SE I-55 · Structure no. 016048800000000
- Built
- 1963
- 62 years old, rebuilt 2015
- Condition
- Fair
- inspected June 2023
- Type
- Stringer/Multi-beam or Girder
- Steel Continuous
- Length
- 166 ft
- 3 main spans
- Daily traffic
- 39,600
- 2023 count
- Owner
- State
- State Highway Agency
About this bridge
Il 171 SB First Av over RR - Cn is a steel continuous stringer/multi-beam or girder carrying Il 171 SB First Av over RR - Cn in Cook County, Illinois. It was built in 1963 and reconstructed in 2015, so it is 62 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 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 39,600 vehicles a day, roughly 9% of them trucks, projected to reach 24,089 by 2046. The structure is 166 ft (50.7 m) long and 55 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 | 8 Very Good | No problems noted. |
| Superstructure | 6 Satisfactory | Structural elements show some minor deterioration. |
| Substructure | 7 Good | Some minor problems. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was Il 171 SB First Av over RR - Cn built?
It was built in 1963, making it 62 years old in 2025. It was reconstructed in 2015.
What condition is Il 171 SB First Av over RR - Cn 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 2023.
How much traffic does Il 171 SB First Av over RR - Cn carry?
About 39,600 vehicles per day (2023 count), of which roughly 9% are trucks.
How long is Il 171 SB First Av over RR - Cn?
The structure is 166 ft (50.7 m) long with a longest span of 63 ft (19.2 m) and a deck 55 ft wide.
Who owns Il 171 SB First Av over RR - Cn?
It is owned by the State Highway Agency.