FAS 339(CH 23) over Hillsbury Slough
FairChampaign County, Illinois · 1.5 MI S Ford CO Lin · Structure no. 010006800000000
- Built
- 1932
- 93 years old, rebuilt 1991
- Condition
- Fair
- inspected March 2023
- Type
- Box Beam or Girders - Multiple
- Prestressed Concrete
- Length
- 43 ft
- 1 main span
- Daily traffic
- 1,000
- 2021 count
- Owner
- County
- County Highway Agency
About this bridge
FAS 339(CH 23) over Hillsbury Slough is a prestressed concrete box beam or girders - multiple carrying FAS 339(CH 23) over Hillsbury Slough in Champaign County, Illinois. It was built in 1932 and reconstructed in 1991, so it is 93 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 1,000 vehicles a day, roughly 4% of them trucks, projected to reach 1,010 by 2046. The structure is 43 ft (13.1 m) long and 28 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 | 6 Satisfactory | Structural elements show some minor deterioration. |
| 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 FAS 339(CH 23) over Hillsbury Slough built?
It was built in 1932, making it 93 years old in 2025. It was reconstructed in 1991.
What condition is FAS 339(CH 23) over Hillsbury Slough 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 March 2023.
How much traffic does FAS 339(CH 23) over Hillsbury Slough carry?
About 1,000 vehicles per day (2021 count), of which roughly 4% are trucks.
How long is FAS 339(CH 23) over Hillsbury Slough?
The structure is 43 ft (13.1 m) long with a longest span of 42 ft (12.9 m) and a deck 28 ft wide.
Who owns FAS 339(CH 23) over Hillsbury Slough?
It is owned by the County Highway Agency.