FAS 666(CH 11) over Big Slough
GoodDouglas County, Illinois · 5 MI W of Arcola · Structure no. 021454800000000
- Built
- 2007
- 18 years old
- Condition
- Good
- inspected November 2021
- Type
- Stringer/Multi-beam or Girder
- Steel
- Length
- 72 ft
- 1 main span
- Daily traffic
- 1,400
- 2022 count
- Owner
- County
- County Highway Agency
About this bridge
FAS 666(CH 11) over Big Slough is a steel stringer/multi-beam or girder carrying FAS 666(CH 11) over Big Slough in Douglas County, Illinois. It was built in 2007, so it is 18 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 1,400 vehicles a day, roughly 16% of them trucks, projected to reach 1,061 by 2046. The structure is 72 ft (21.9 m) long and 42 ft wide. If it were closed, the detour would be 3.7 mi (6 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. |
| Channel and channel protection | 8 Very Good | No problems noted. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was FAS 666(CH 11) over Big Slough built?
It was built in 2007, making it 18 years old in 2025.
What condition is FAS 666(CH 11) over Big Slough 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 2021.
How much traffic does FAS 666(CH 11) over Big Slough carry?
About 1,400 vehicles per day (2022 count), of which roughly 16% are trucks.
How long is FAS 666(CH 11) over Big Slough?
The structure is 72 ft (21.9 m) long with a longest span of 70 ft (21.2 m) and a deck 42 ft wide.
Who owns FAS 666(CH 11) over Big Slough?
It is owned by the County Highway Agency.