Il 121 over North Br Lake Fork
FairLogan County, Illinois · 3.9M E IL54-MT Pul.* · Structure no. 054002200000000
- Built
- 1931
- 94 years old, rebuilt 1989
- Condition
- Fair
- inspected February 2025
- Type
- Stringer/Multi-beam or Girder
- Steel Continuous
- Length
- 131 ft
- 3 main spans
- Daily traffic
- 2,850
- 2023 count
- Owner
- State
- State Highway Agency
About this bridge
Il 121 over North Br Lake Fork is a steel continuous stringer/multi-beam or girder carrying Il 121 over North Br Lake Fork in Logan County, Illinois. It was built in 1931 and reconstructed in 1989, so it is 94 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 2,850 vehicles a day, roughly 21% of them trucks, projected to reach 3,203 by 2046. The structure is 131 ft (39.9 m) long and 35 ft wide. If it were closed, the detour would be 34.2 mi (55 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 | 6 Satisfactory | Structural elements show some minor deterioration. |
| Superstructure | 7 Good | Some minor problems. |
| Substructure | 7 Good | Some minor problems. |
| 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 Il 121 over North Br Lake Fork built?
It was built in 1931, making it 94 years old in 2025. It was reconstructed in 1989.
What condition is Il 121 over North Br Lake Fork 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 February 2025.
How much traffic does Il 121 over North Br Lake Fork carry?
About 2,850 vehicles per day (2023 count), of which roughly 21% are trucks.
How long is Il 121 over North Br Lake Fork?
The structure is 131 ft (39.9 m) long with a longest span of 43 ft (13.1 m) and a deck 35 ft wide.
Who owns Il 121 over North Br Lake Fork?
It is owned by the State Highway Agency.