Il 23 over Coon Creek
FairMcHenry County, Illinois · 0.6 M S I-90 Toll · Structure no. 056027700000000
- Built
- 2011
- 14 years old
- Condition
- Fair
- inspected October 2021
- Type
- Stringer/Multi-beam or Girder
- Steel Continuous
- Length
- 144 ft
- 3 main spans
- Daily traffic
- 3,250
- 2023 count
- Owner
- State
- State Highway Agency
About this bridge
Il 23 over Coon Creek is a steel continuous stringer/multi-beam or girder carrying Il 23 over Coon Creek in McHenry County, Illinois. It was built in 2011, so it is 14 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 3,250 vehicles a day, roughly 11% of them trucks, projected to reach 3,480 by 2046. The structure is 144 ft (43.9 m) long and 48 ft wide.
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 | 7 Good | Some minor problems. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was Il 23 over Coon Creek built?
It was built in 2011, making it 14 years old in 2025.
What condition is Il 23 over Coon 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 October 2021.
How much traffic does Il 23 over Coon Creek carry?
About 3,250 vehicles per day (2023 count), of which roughly 11% are trucks.
How long is Il 23 over Coon Creek?
The structure is 144 ft (43.9 m) long with a longest span of 49 ft (14.9 m) and a deck 48 ft wide.
Who owns Il 23 over Coon Creek?
It is owned by the State Highway Agency.