Il 40 over Rock River
GoodWhiteside County, Illinois · Sterling & Rock Fall · Structure no. 098011500000000
- Built
- 2012
- 13 years old
- Condition
- Good
- inspected July 2023
- Type
- Stringer/Multi-beam or Girder
- Steel Continuous
- Length
- 1,030 ft
- 8 main spans
- Daily traffic
- 19,800
- 2021 count
- Owner
- State
- State Highway Agency
About this bridge
Il 40 over Rock River is a steel continuous stringer/multi-beam or girder carrying Il 40 over Rock River in Whiteside County, Illinois. It was built in 2012, so it is 13 years old, younger than the Illinois average of 45.3 years.
The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.
It carries about 19,800 vehicles a day, roughly 2% of them trucks, projected to reach 19,998 by 2046. The structure is 1,030 ft (314 m) long and 78 ft wide. If it were closed, the detour would be 9.9 mi (16 km).
Location
Open in Google MapsCondition and inspection
All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.
| Component | Rating | Meaning |
|---|---|---|
| Deck | 7 Good | Some minor problems. |
| Superstructure | 8 Very Good | No problems noted. |
| Substructure | 8 Very Good | No problems noted. |
| Channel and channel protection | 8 Very Good | No problems noted. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was Il 40 over Rock River built?
It was built in 2012, making it 13 years old in 2025.
What condition is Il 40 over Rock River in?
The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in July 2023.
How much traffic does Il 40 over Rock River carry?
About 19,800 vehicles per day (2021 count), of which roughly 2% are trucks.
How long is Il 40 over Rock River?
The structure is 1,030 ft (314 m) long with a longest span of 141 ft (43.1 m) and a deck 78 ft wide.
Who owns Il 40 over Rock River?
It is owned by the State Highway Agency.