Il 29 over Salt Creek
FairMason County, Illinois · Mason Menard CO Line · Structure no. 065050100000000
- Built
- 2002
- 23 years old
- Condition
- Fair
- inspected March 2023
- Type
- Stringer/Multi-beam or Girder
- Steel Continuous
- Length
- 1,342 ft
- 3 main spans
- Daily traffic
- 2,000
- 2023 count
- Owner
- State
- State Highway Agency
About this bridge
Il 29 over Salt Creek is a steel continuous stringer/multi-beam or girder carrying Il 29 over Salt Creek in Mason County, Illinois. It was built in 2002, so it is 23 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 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 2,000 vehicles a day, roughly 18% of them trucks, projected to reach 1,616 by 2046. The structure is 1,342 ft (409 m) long and 35 ft wide. If it were closed, the detour would be 39.8 mi (64 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. |
| Channel and channel protection | 8 Very Good | No problems noted. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was Il 29 over Salt Creek built?
It was built in 2002, making it 23 years old in 2025.
What condition is Il 29 over Salt 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 2023.
How much traffic does Il 29 over Salt Creek carry?
About 2,000 vehicles per day (2023 count), of which roughly 18% are trucks.
How long is Il 29 over Salt Creek?
The structure is 1,342 ft (409 m) long with a longest span of 240 ft (73.2 m) and a deck 35 ft wide.
Who owns Il 29 over Salt Creek?
It is owned by the State Highway Agency.