Il 47 over Silver Creek
FairMcHenry County, Illinois · 9.0 S of State Line · Structure no. 056005500000000
- Built
- 1985
- 40 years old
- Condition
- Fair
- inspected September 2023
- Type
- Culvert
- Concrete Continuous
- Length
- 35 ft
- 2 main spans
- Daily traffic
- 4,500
- 2023 count
- Owner
- State
- State Highway Agency
About this bridge
Il 47 over Silver Creek is a concrete continuous culvert carrying Il 47 over Silver Creek in McHenry County, Illinois. It was built in 1985, so it is 40 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 4,500 vehicles a day, roughly 11% of them trucks, projected to reach 6,660 by 2046. The structure is 35 ft (10.7 m) long.
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 |
|---|---|---|
| Channel and channel protection | 6 Satisfactory | Structural elements show some minor deterioration. |
| Culvert | 6 Satisfactory | Structural elements show some minor deterioration. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was Il 47 over Silver Creek built?
It was built in 1985, making it 40 years old in 2025.
What condition is Il 47 over Silver 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 September 2023.
How much traffic does Il 47 over Silver Creek carry?
About 4,500 vehicles per day (2023 count), of which roughly 11% are trucks.
How long is Il 47 over Silver Creek?
The structure is 35 ft (10.7 m) long with a longest span of 17 ft (5.2 m).
Who owns Il 47 over Silver Creek?
It is owned by the State Highway Agency.