Il 171 NB First Av over S&s Canal
FairCook County, Illinois · 0.2 M SE I-55 · Structure no. 016048700000000
- Built
- 1963
- 62 years old, rebuilt 2016
- Condition
- Fair
- inspected April 2024
- Type
- Stringer/Multi-beam or Girder
- Steel Continuous
- Length
- 795 ft
- 11 main spans
- Daily traffic
- 39,600
- 2023 count
- Owner
- State
- State Highway Agency
About this bridge
Il 171 NB First Av over S&s Canal is a steel continuous stringer/multi-beam or girder carrying Il 171 NB First Av over S&s Canal in Cook County, Illinois. It was built in 1963 and reconstructed in 2016, 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 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 39,600 vehicles a day, roughly 9% of them trucks, projected to reach 24,089 by 2046. The structure is 795 ft (242.2 m) long and 43 ft wide. If it were closed, the detour would be 5 mi (8 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 | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
| 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 Il 171 NB First Av over S&s Canal built?
It was built in 1963, making it 62 years old in 2025. It was reconstructed in 2016.
What condition is Il 171 NB First Av over S&s Canal 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 Il 171 NB First Av over S&s Canal carry?
About 39,600 vehicles per day (2023 count), of which roughly 9% are trucks.
How long is Il 171 NB First Av over S&s Canal?
The structure is 795 ft (242.2 m) long with a longest span of 174 ft (52.9 m) and a deck 43 ft wide.
Who owns Il 171 NB First Av over S&s Canal?
It is owned by the State Highway Agency.