Ontario Road over I-74
PoorKnox County, Illinois · .5 MI N Henderson CR · Structure no. 048003600000000
- Built
- 1966
- 59 years old
- Condition
- Poor
- inspected December 2023
- Type
- Stringer/Multi-beam or Girder
- Steel Continuous
- Length
- 222 ft
- 4 main spans
- Daily traffic
- 200
- 2022 count
- Owner
- State
- State Highway Agency
About this bridge
Ontario Road over I-74 is a steel continuous stringer/multi-beam or girder carrying Ontario Road over I-74 in Knox County, Illinois. It was built in 1966, so it is 59 years old, older than the Illinois average of 45.3 years.
The most recent inspection reported to the Federal Highway Administration rates it in poor condition with a lowest component rating of 3 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.
It carries about 200 vehicles a day, roughly 5% of them trucks, projected to reach 278 by 2046. The structure is 222 ft (67.7 m) long and 32 ft wide. If it were closed, the detour would be 6.2 mi (10 km).
Location
Open in Google MapsCondition and inspection
The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.
| Component | Rating | Meaning |
|---|---|---|
| Deck | 3 Serious | Loss of section, deterioration, spalling or scour have seriously affected primary structural components. |
| Superstructure | 4 Poor | Advanced section loss, deterioration, spalling or scour. |
| Substructure | 6 Satisfactory | Structural elements show some minor deterioration. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was Ontario Road over I-74 built?
It was built in 1966, making it 59 years old in 2025.
What condition is Ontario Road over I-74 in?
The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in December 2023.
How much traffic does Ontario Road over I-74 carry?
About 200 vehicles per day (2022 count), of which roughly 5% are trucks.
How long is Ontario Road over I-74?
The structure is 222 ft (67.7 m) long with a longest span of 67 ft (20.4 m) and a deck 32 ft wide.
Who owns Ontario Road over I-74?
It is owned by the State Highway Agency.