Commonwealth Avenu over Flagg Creek
FairCook County, Illinois · 0.4MI S of 47th ST · Structure no. 016680400000000
- Built
- 1990
- 35 years old
- Condition
- Fair
- inspected November 2023
- Type
- Stringer/Multi-beam or Girder
- Steel Continuous
- Length
- 99 ft
- 3 main spans
- Daily traffic
- 425
- 2022 count
- Owner
- City
- City or Municipal Highway Agency
About this bridge
Commonwealth Avenu over Flagg Creek is a steel continuous stringer/multi-beam or girder carrying Commonwealth Avenu over Flagg Creek in Cook County, Illinois. It was built in 1990, so it is 35 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 425 vehicles a day, roughly 4% of them trucks, projected to reach 530 by 2046. The structure is 99 ft (30.2 m) long and 39 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 | 6 Satisfactory | Structural elements show some minor deterioration. |
| Substructure | 7 Good | Some minor problems. |
| 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 Commonwealth Avenu over Flagg Creek built?
It was built in 1990, making it 35 years old in 2025.
What condition is Commonwealth Avenu over Flagg Creek 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 November 2023.
How much traffic does Commonwealth Avenu over Flagg Creek carry?
About 425 vehicles per day (2022 count), of which roughly 4% are trucks.
How long is Commonwealth Avenu over Flagg Creek?
The structure is 99 ft (30.2 m) long with a longest span of 36 ft (11 m) and a deck 39 ft wide.
Who owns Commonwealth Avenu over Flagg Creek?
It is owned by the City or Municipal Highway Agency.