US 34/ FAP 591 over Big Rock CR
FairKendall County, Illinois · 4.3 M. W. of Il 47 · Structure no. 047005100000000
- Built
- 1990
- 35 years old, rebuilt 2014
- Condition
- Fair
- inspected February 2022
- Type
- Stringer/Multi-beam or Girder
- Prestressed Concrete
- Length
- 162 ft
- 3 main spans
- Daily traffic
- 16,000
- 2023 count
- Owner
- State
- State Highway Agency
About this bridge
US 34/ FAP 591 over Big Rock CR is a prestressed concrete stringer/multi-beam or girder carrying US 34/ FAP 591 over Big Rock CR in Kendall County, Illinois. It was built in 1990 and reconstructed in 2014, 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 16,000 vehicles a day, roughly 7% of them trucks, projected to reach 18,487 by 2046. The structure is 162 ft (49.4 m) long and 72 ft wide. If it were closed, the detour would be 1.9 mi (3 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 | 8 Very Good | No problems noted. |
| Substructure | 7 Good | Some minor problems. |
| Channel and channel protection | 8 Very Good | No problems noted. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was US 34/ FAP 591 over Big Rock CR built?
It was built in 1990, making it 35 years old in 2025. It was reconstructed in 2014.
What condition is US 34/ FAP 591 over Big Rock CR 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 February 2022.
How much traffic does US 34/ FAP 591 over Big Rock CR carry?
About 16,000 vehicles per day (2023 count), of which roughly 7% are trucks.
How long is US 34/ FAP 591 over Big Rock CR?
The structure is 162 ft (49.4 m) long with a longest span of 59 ft (17.9 m) and a deck 72 ft wide.
Who owns US 34/ FAP 591 over Big Rock CR?
It is owned by the State Highway Agency.