Ch 23 Quercus Grov over Cahokia Creek
FairMadison County, Illinois · 1.5M N of Carpenter · Structure no. 060323900000000
- Built
- 1984
- 41 years old
- Condition
- Fair
- inspected October 2023
- Type
- Box Beam or Girders - Multiple
- Prestressed Concrete
- Length
- 346 ft
- 5 main spans
- Daily traffic
- 100
- 2021 count
- Owner
- County
- County Highway Agency
About this bridge
Ch 23 Quercus Grov over Cahokia Creek is a prestressed concrete box beam or girders - multiple carrying Ch 23 Quercus Grov over Cahokia Creek in Madison County, Illinois. It was built in 1984, so it is 41 years old, younger 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 100 vehicles a day, roughly 11% of them trucks, projected to reach 107 by 2046. The structure is 346 ft (105.5 m) long and 30 ft wide. If it were closed, the detour would be 6.8 mi (11 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 | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
| Superstructure | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
| Substructure | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
| Channel and channel protection | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was Ch 23 Quercus Grov over Cahokia Creek built?
It was built in 1984, making it 41 years old in 2025.
What condition is Ch 23 Quercus Grov over Cahokia 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 October 2023.
How much traffic does Ch 23 Quercus Grov over Cahokia Creek carry?
About 100 vehicles per day (2021 count), of which roughly 11% are trucks.
How long is Ch 23 Quercus Grov over Cahokia Creek?
The structure is 346 ft (105.5 m) long with a longest span of 69 ft (21 m) and a deck 30 ft wide.
Who owns Ch 23 Quercus Grov over Cahokia Creek?
It is owned by the County Highway Agency.