FAS 661(CH 20) over Kaskaskia River
FairColes County, Illinois · N of Cooks Mills · Structure no. 015005600000000
- Built
- 1937
- 88 years old, rebuilt 1981
- Condition
- Fair
- inspected January 2025
- Type
- Stringer/Multi-beam or Girder
- Steel Continuous
- Length
- 279 ft
- 4 main spans
- Daily traffic
- 600
- 2024 count
- Owner
- County
- County Highway Agency
About this bridge
FAS 661(CH 20) over Kaskaskia River is a steel continuous stringer/multi-beam or girder carrying FAS 661(CH 20) over Kaskaskia River in Coles County, Illinois. It was built in 1937 and reconstructed in 1981, so it is 88 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 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 600 vehicles a day, roughly 10% of them trucks, projected to reach 657 by 2046. The structure is 279 ft (85 m) long and 33 ft wide. If it were closed, the detour would be 1.2 mi (2 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 | 7 Good | Some minor problems. |
| Channel and channel protection | 7 Good | Some minor problems. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was FAS 661(CH 20) over Kaskaskia River built?
It was built in 1937, making it 88 years old in 2025. It was reconstructed in 1981.
What condition is FAS 661(CH 20) over Kaskaskia River 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 January 2025.
How much traffic does FAS 661(CH 20) over Kaskaskia River carry?
About 600 vehicles per day (2024 count), of which roughly 10% are trucks.
How long is FAS 661(CH 20) over Kaskaskia River?
The structure is 279 ft (85 m) long with a longest span of 76 ft (23.2 m) and a deck 33 ft wide.
Who owns FAS 661(CH 20) over Kaskaskia River?
It is owned by the County Highway Agency.