Ill 4-150 over Marys River
FairRandolph County, Illinois · W of Steeleville · Structure no. 079000700000000
- Built
- 1928
- 97 years old, rebuilt 1977
- Condition
- Fair
- inspected September 2024
- Type
- Stringer/Multi-beam or Girder
- Steel
- Length
- 188 ft
- 1 main span
- Daily traffic
- 5,500
- 2023 count
- Owner
- State
- State Highway Agency
About this bridge
Ill 4-150 over Marys River is a steel stringer/multi-beam or girder carrying Ill 4-150 over Marys River in Randolph County, Illinois. It was built in 1928 and reconstructed in 1977, so it is 97 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 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 5,500 vehicles a day, roughly 33% of them trucks, projected to reach 5,303 by 2046. The structure is 188 ft (57.3 m) long and 46 ft wide. If it were closed, the detour would be 29.8 mi (48 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 | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
| 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 Ill 4-150 over Marys River built?
It was built in 1928, making it 97 years old in 2025. It was reconstructed in 1977.
What condition is Ill 4-150 over Marys River 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 September 2024.
How much traffic does Ill 4-150 over Marys River carry?
About 5,500 vehicles per day (2023 count), of which roughly 33% are trucks.
How long is Ill 4-150 over Marys River?
The structure is 188 ft (57.3 m) long with a longest span of 102 ft (31.1 m) and a deck 46 ft wide.
Who owns Ill 4-150 over Marys River?
It is owned by the State Highway Agency.