Il 171 EB (archer) over 79th ST WB
GoodCook County, Illinois · 0.8 M E US 45 · Structure no. 016003800000000
- Built
- 2021
- 4 years old
- Condition
- Good
- inspected November 2023
- Type
- Stringer/Multi-beam or Girder
- Prestressed Concrete
- Length
- 88 ft
- 1 main span
- Daily traffic
- 21,500
- 2022 count
- Owner
- State
- State Highway Agency
About this bridge
Il 171 EB (archer) over 79th ST WB is a prestressed concrete stringer/multi-beam or girder carrying Il 171 EB (archer) over 79th ST WB in Cook County, Illinois. It was built in 2021, so it is 4 years old, younger than the Illinois average of 45.3 years.
The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 8 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.
It carries about 21,500 vehicles a day, roughly 15% of them trucks, projected to reach 16,362 by 2046. The structure is 88 ft (26.9 m) long and 53 ft wide. If it were closed, the detour would be 1.2 mi (2 km).
Location
Open in Google MapsCondition and inspection
All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.
| Component | Rating | Meaning |
|---|---|---|
| Deck | 8 Very Good | No problems noted. |
| Superstructure | 8 Very Good | No problems noted. |
| Substructure | 8 Very Good | No problems noted. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was Il 171 EB (archer) over 79th ST WB built?
It was built in 2021, making it 4 years old in 2025.
What condition is Il 171 EB (archer) over 79th ST WB in?
The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in November 2023.
How much traffic does Il 171 EB (archer) over 79th ST WB carry?
About 21,500 vehicles per day (2022 count), of which roughly 15% are trucks.
How long is Il 171 EB (archer) over 79th ST WB?
The structure is 88 ft (26.9 m) long with a longest span of 79 ft (24 m) and a deck 53 ft wide.
Who owns Il 171 EB (archer) over 79th ST WB?
It is owned by the State Highway Agency.