CH-20 over Davidson Creek
FairMarion County, Illinois · 1 MI W Tonti · Structure no. 061317900000000
- Built
- 1977
- 48 years old
- Condition
- Fair
- inspected March 2024
- Type
- Channel Beam
- Concrete
- Length
- 26 ft
- 1 main span
- Daily traffic
- 350
- 2022 count
- Owner
- County
- County Highway Agency
About this bridge
CH-20 over Davidson Creek is a concrete channel beam carrying CH-20 over Davidson Creek in Marion County, Illinois. It was built in 1977, so it is 48 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 350 vehicles a day, roughly 17% of them trucks, projected to reach 354 by 2046. The structure is 26 ft (7.9 m) long and 30 ft wide. If it were closed, the detour would be 3.1 mi (5 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 | 7 Good | Some minor problems. |
| Superstructure | 7 Good | Some minor problems. |
| 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-20 over Davidson Creek built?
It was built in 1977, making it 48 years old in 2025.
What condition is CH-20 over Davidson Creek 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 2024.
How much traffic does CH-20 over Davidson Creek carry?
About 350 vehicles per day (2022 count), of which roughly 17% are trucks.
How long is CH-20 over Davidson Creek?
The structure is 26 ft (7.9 m) long with a longest span of 25 ft (7.6 m) and a deck 30 ft wide.
Who owns CH-20 over Davidson Creek?
It is owned by the County Highway Agency.