Il 120 over Boone Creek
FairMcHenry County, Illinois · N Limits of Mchenry · Structure no. 056000600000000
- Built
- 1973
- 52 years old
- Condition
- Fair
- inspected June 2023
- Type
- Culvert
- Concrete Continuous
- Length
- 26 ft
- 3 main spans
- Daily traffic
- 25,900
- 2023 count
- Owner
- State
- State Highway Agency
About this bridge
Il 120 over Boone Creek is a concrete continuous culvert carrying Il 120 over Boone Creek in McHenry County, Illinois. It was built in 1973, so it is 52 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 25,900 vehicles a day, roughly 6% of them trucks, projected to reach 16,080 by 2046. The structure is 26 ft (7.9 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 | 7 Good | Some minor problems. |
| Culvert | 6 Satisfactory | Structural elements show some minor deterioration. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was Il 120 over Boone Creek built?
It was built in 1973, making it 52 years old in 2025.
What condition is Il 120 over Boone 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 June 2023.
How much traffic does Il 120 over Boone Creek carry?
About 25,900 vehicles per day (2023 count), of which roughly 6% are trucks.
How long is Il 120 over Boone Creek?
The structure is 26 ft (7.9 m) long with a longest span of 8 ft (2.4 m).
Who owns Il 120 over Boone Creek?
It is owned by the State Highway Agency.