Il 123 / Ch 2 over I-55
FairSangamon County, Illinois · Williamsville Intchg · Structure no. 084017100000000
- Built
- 1974
- 51 years old, rebuilt 2020
- Condition
- Fair
- inspected July 2024
- Type
- Stringer/Multi-beam or Girder
- Steel Continuous
- Length
- 276 ft
- 2 main spans
- Daily traffic
- 8,100
- 2023 count
- Owner
- State
- State Highway Agency
About this bridge
Il 123 / Ch 2 over I-55 is a steel continuous stringer/multi-beam or girder carrying Il 123 / Ch 2 over I-55 in Sangamon County, Illinois. It was built in 1974 and reconstructed in 2020, so it is 51 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 8,100 vehicles a day, roughly 25% of them trucks, projected to reach 6,111 by 2046. The structure is 276 ft (84 m) long and 69 ft wide. If it were closed, the detour would be 8.1 mi (13 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 | 6 Satisfactory | Structural elements show some minor deterioration. |
| Substructure | 7 Good | Some minor problems. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was Il 123 / Ch 2 over I-55 built?
It was built in 1974, making it 51 years old in 2025. It was reconstructed in 2020.
What condition is Il 123 / Ch 2 over I-55 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 July 2024.
How much traffic does Il 123 / Ch 2 over I-55 carry?
About 8,100 vehicles per day (2023 count), of which roughly 25% are trucks.
How long is Il 123 / Ch 2 over I-55?
The structure is 276 ft (84 m) long with a longest span of 110 ft (33.6 m) and a deck 69 ft wide.
Who owns Il 123 / Ch 2 over I-55?
It is owned by the State Highway Agency.