Ch 50 over Rayhill Slough
PoorSt. Clair County, Illinois · 1.50MI S Ill 177 · Structure no. 082302100000000
- Built
- 1954
- 71 years old, rebuilt 1988
- Condition
- Poor
- inspected February 2024
- Type
- Stringer/Multi-beam or Girder
- Steel Continuous
- Length
- 159 ft
- 3 main spans
- Daily traffic
- 475
- 2023 count
- Owner
- County
- County Highway Agency
About this bridge
Ch 50 over Rayhill Slough is a steel continuous stringer/multi-beam or girder carrying Ch 50 over Rayhill Slough in St. Clair County, Illinois. It was built in 1954 and reconstructed in 1988, so it is 71 years old, older than the Illinois average of 45.3 years.
The most recent inspection reported to the Federal Highway Administration rates it in poor condition with a lowest component rating of 4 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.
It carries about 475 vehicles a day, roughly 12% of them trucks, projected to reach 556 by 2046. The structure is 159 ft (48.5 m) long and 29 ft wide. If it were closed, the detour would be 8.7 mi (14 km).
Location
Open in Google MapsCondition and inspection
The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.
| Component | Rating | Meaning |
|---|---|---|
| Deck | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
| Superstructure | 4 Poor | Advanced section loss, deterioration, spalling or scour. |
| Substructure | 6 Satisfactory | Structural elements show some minor deterioration. |
| 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 Ch 50 over Rayhill Slough built?
It was built in 1954, making it 71 years old in 2025. It was reconstructed in 1988.
What condition is Ch 50 over Rayhill Slough in?
The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in February 2024.
How much traffic does Ch 50 over Rayhill Slough carry?
About 475 vehicles per day (2023 count), of which roughly 12% are trucks.
How long is Ch 50 over Rayhill Slough?
The structure is 159 ft (48.5 m) long with a longest span of 60 ft (18.3 m) and a deck 29 ft wide.
Who owns Ch 50 over Rayhill Slough?
It is owned by the County Highway Agency.