Il 99 over Swamp Ditch
FairSchuyler County, Illinois · 1M S Il 101 · Structure no. 085201100000000
- Built
- 1939
- 86 years old, rebuilt 1990
- Condition
- Fair
- inspected April 2023
- Type
- Culvert
- Concrete
- Length
- 23 ft
- 2 main spans
- Daily traffic
- 400
- 2023 count
- Owner
- State
- State Highway Agency
About this bridge
Il 99 over Swamp Ditch is a concrete culvert carrying Il 99 over Swamp Ditch in Schuyler County, Illinois. It was built in 1939 and reconstructed in 1990, so it is 86 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 400 vehicles a day, roughly 14% of them trucks, projected to reach 480 by 2046. The structure is 23 ft (7 m) long. If it were closed, the detour would be 14.9 mi (24 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 |
|---|---|---|
| Channel and channel protection | 6 Satisfactory | Structural elements show some minor deterioration. |
| Culvert | 6 Satisfactory | Structural elements show some minor deterioration. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was Il 99 over Swamp Ditch built?
It was built in 1939, making it 86 years old in 2025. It was reconstructed in 1990.
What condition is Il 99 over Swamp Ditch 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 April 2023.
How much traffic does Il 99 over Swamp Ditch carry?
About 400 vehicles per day (2023 count), of which roughly 14% are trucks.
How long is Il 99 over Swamp Ditch?
The structure is 23 ft (7 m) long with a longest span of 10 ft (3 m).
Who owns Il 99 over Swamp Ditch?
It is owned by the State Highway Agency.